resources on communication

今天又开放了

2008-04-01T17:42:00.000+08:00

gfw暂时开放

2007-10-22T12:39:00.000+08:00

难得今天可以连上

抓虾-The Best of Technology Writing 2006

2007-09-25T09:53:00.001+08:00

你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：

The Best of Technology Writing 2006

"The essays collected in this book are sparkling, imaginative pieces of journalism that just happen to be about technology. People steeped in the world of AJAX or Massively Mulitplayer Online Games will find a lot to value here, but so will readers simply in search of good writing." —James Fallows, National Correspondent for Atlantic Monthly "The human [...]

抓虾-WiMAX: Technology for Broadband Wireless Access

2007-09-25T09:51:00.001+08:00

你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：

WiMAX: Technology for Broadband Wireless Access

WiMAX Broadband Wireless Access Technology, based on the IEEE 802.16 standard, is at the origin of great promises for many different markets covering fixed wireless Internet Access, Backhauling and Mobile cellular networks. WiMAX technology is designed for the transmission of multimedia services (voice, Internet, email, games and others) at high data rates (of the order [...]

抓虾-Algorithm Collections for Digital Signal Processing Applications using Matlab

2007-09-25T09:50:00.001+08:00

你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：

Algorithm Collections for Digital Signal Processing Applications using Matlab

The Algorithms such as SVD, Eigen decomposition, Gaussian Mixture Model, HMM etc. are scattered in different fields. There is the need to collect all such algorithms for quick reference. Also there is the need to view such algorithms in application point of view. Algorithm Collections for Digital Signal Processing Applications using MATLAB attempts to satisfy [...]

抓虾-（长篇）明朝的那些事儿－历史应该可以写得好�碵989]

2007-08-20T08:40:00.001+08:00

你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：

（长篇）明朝的那些事儿－历史应该可以写得好看[989]

（长篇）明朝的那些事儿－历史应该可以写得好看[989]

所谓扶乩，是一种玄乎其玄的玩意儿，大致方法是皇帝把要问的问题写在纸上，然后密封起来，由太监转交给道士，再由道士当众烧毁，权当是转交给神仙，这就算是问完问题了。

那么答案去哪里找呢？你总不能指望天上掉块砖头，上面写着几个大字"我不知道"吧。

正确的程序是这样的，先找来一个沙盘，在沙盘上搭个架子，架子上有两根树枝，分别由两个太监用指头搭住，等到道士把皇帝的问题烧掉，不，是转交神仙，两人便即刻作中风状，两眼紧闭，任由指头在沙上乱画，神仙的答案就是这个了。

可能有人会问，要是画的四不像，那该怎么办，告诉你，不要紧，皇帝大人自然会去琢磨，毕竟我们也不能指望神仙大人的书法水平。

二十多年来，皇帝一直通过这种方式和神仙沟通、交流心得、请教问题，于是疑问又出现了，以嘉靖的性格，怎么能够几十年如一日去研究扶乩中出现的莫名其妙的符号呢？

嘉靖并不是一个有耐心的人，所以答案是，他所看到的并不是鬼画符，而是足以识别的汉字。

其实用指头搭在树枝上，也是可以写出规范回答的，但需要一个条件——故意，只要你没有被鬼上身，只要你还有清醒的意识，你的手腕就能让你写出清晰的汉字，当然这绝不是神仙的意图，而是你自己的答复。

也就是说，嘉靖先生费尽心机得到的所谓神仙热线，不过是出自几个道士太监的手笔，但由于他过于期待上天的信息，所以仍然无怨无悔地相信了它几十年。

其实这也怪不得道士和太监，人家也是迫不得已，你写那些无聊的问题，还不许人看，偏偏还要神仙回信，乱画一气你又看不懂，看不懂就要发脾气，到时自然还是下人们遭殃，道士也好，太监也罢，大家出来混，不过是想混饭吃，何苦难为人呢，就这么忽悠着过吧。

而在这个把戏中，最为关键的人却不是皇帝，而是那个烧掉纸的道士。

因为他是转交皇帝问题的人，也是最为重要的一环，所以这个职位一向由皇帝最宠信的道士担任，比如之前的邵元节，后来的陶仲文，以及现在的蓝道行。

蓝道行人如其名，还真是有点道行，据说他算命看相十分之准，名声很大，便被推举进宫为皇帝服务，并担任那个烧纸的工作。

抓虾-Nature.in.Fragments.The.Legacy.of.Sprawl.eBook-EEn

2007-07-21T08:44:00.001+08:00

你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：

Nature.in.Fragments.The.Legacy.of.Sprawl.eBook-EEn

书名：Nature in Fragments: The Legacy of Sprawl (American Museum of Natural History Series on Biodiversity)
编者：Elizabeth A. Johnson, Michael W. Klemens
出版商：Columbia University Press
发行日期：2005年9月26日
语言：英语
ISBN-10/ISBN-13：0231127790／978-0231127790
http://www.amazon.com/Nature-Fragme.../dp/0231127790/

抓虾-Wiley.QoS.Over.Heterogeneous.Networks.Jun.2007.eBook-BBL

2007-07-05T20:29:00.001+08:00

你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：

Wiley.QoS.Over.Heterogeneous.Networks.Jun.2007.eBook-BBL

电子书：异构网络QoS。
http://eu.wiley.com/WileyCDA/WileyT...047001752X.html

抓虾-IGI.Global.Design.Pattern.Formalization.Techniques.Mar.2007.eBook-BBL

2007-06-29T10:19:00.000+08:00

你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：

IGI.Global.Design.Pattern.Formalization.Techniques.Mar.2007.eBook-BBL

书名：Design Pattern Formalization Techniques《设计模式形式化技术》
编者：Toufik Taibi
出版商：IGI Publishing
发行日期：2007年3月30日
语言：英语
ISBN：1599042193
这是一本介绍设计模式的书，通过对不同设计模式形式化技术的讲解，来满足设计者不同需求。
http://www.amazon.com/exec/obidos/tg/detail/-/1599042193/

抓虾-IGI - Architectural Design of Multi-Agent Systems: Technologies and Techniques

2007-06-21T09:22:00.001+08:00

你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：

IGI - Architectural Design of Multi-Agent Systems: Technologies and Techniques

TITLE : Architectural Design of Multi-Agent Systems: Technologies and Techniques (Premier Reference Series) (Hardcover)
AUTHOR : by Hong Lin (Editor)
PUBLISHER : IGI Global publisher
ISBN : 1599041081
EDITION : 1st
PUB DATE : June 05, 2007
LANGUAGE : English

Agent-oriented design has become on of the most active areas in the
field of software engineering. Although great advances have been made in
the study of the architectural design of agent systems, the complexity
and multi-disciplinary approaches of this constantly growing field are
currently of a premature nature compared to where they should be.
Architectural Design of Multi-Agent Systems: Technologies and Techniques
provides a compilation of advanced research results focusing on
architecture and modeling issues of multi-agent systems. This study
serves as a reference for further research on system models,
architectural design languages, formal methods and reasoning, module
interface design, and design issues. Architectural Design of Multi-Agent
Systems: Technologies and Techniques presents high-level issues such as:
modeling agent systems in cognitive sciences, knowledge management,
in-depth exposure of agent theory, and state-of-the-art research on
design quality of agent systems.

URL: http://www.amazon.com/exec/obidos/tg/detail/-/1599041081/
(more…)

抓虾-CRC.Press.Wireless.Ad.Hoc.and.Sensor.Networks.Apr.2007.eBook-BBL

2007-06-20T09:25:00.001+08:00

你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：

CRC.Press.Wireless.Ad.Hoc.and.Sensor.Networks.Apr.2007.eBook-BBL

书名：无线专场和传感器网络：协议，性能和控制（控制工程）
作者：Jagannathan Sarangapani
出版商：CRC
发行日期：April 23, 2007
语言：英语
ISBN-10/ISBN-13： 0824726758/978-0824726751
http://www.amazon.com/exec/obidos/tg/detail/-/0824726758/

抓虾-Next Generation SDH/SONET: Evolution or Revolution

2007-06-19T15:10:00.001+08:00

你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：

Next Generation SDH/SONET: Evolution or Revolution

Hardcover: 254 pages Publisher: Wiley (April 29, 2005) Language: English ISBN-10: 0470091207 Since the turn of the twentieth century, telecommunications has shifted from traditional voice transport to data transport, although digitized voice is still a large contributor. Instead of an evolution of existing transport standards, a revolution was necessary in order to enable additional data-related transport. Share This

抓虾-Wiley Encyclopedia of Telecommunications , 5 Volume Set

2007-06-19T15:08:00.000+08:00

你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：

Wiley Encyclopedia of Telecommunications , 5 Volume Set

John G. Proakis,

抓虾-Wiley Encyclopedia of Telecommunications , 5 Volume Set

2007-06-19T10:28:00.001+08:00
    你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：


Wiley Encyclopedia of Telecommunications , 5 Volume Set



John G. Proakis,

抓虾-Excel for Scientists and Engineers: Numerical Methods

2007-06-16T15:17:00.003+08:00
    你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：


Excel for Scientists and Engineers: Numerical Methods



E. Joseph Billo,

抓虾-Quantum Theory of Magnetism, 3rd Edition

2007-06-16T15:17:00.001+08:00
    你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：


Quantum Theory of Magnetism, 3rd Edition



Robert M. White,

抓虾-Experimental Aspects of Quantum Computing

2007-06-16T15:15:00.001+08:00
    你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：


Experimental Aspects of Quantum Computing



Henry O. Everitt,

抓虾-Pattern-Oriented Software Architecture Volume 4: A Pattern Language for Distributed Computing

2007-06-16T14:52:00.001+08:00
    你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：


Pattern-Oriented Software Architecture Volume 4: A Pattern Language for Distributed Computing

    Hardcover: 636 pages Publisher: Wiley (May 11, 2007) Language: English ISBN-10: 0470059028 The eagerly awaited Pattern-Oriented Software Architecture (POSA) Volume 4 is about a pattern language for distributed computing. The authors will guide you through the best practices and introduce you to key areas of building distributed software systems. POSA 4 connects many stand-alone patterns, pattern collections and pattern languages [...]

抓虾-Wireless Sensor Networks: Technology, Protocols, and Applications

2007-06-16T13:14:00.001+08:00
    你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：


Wireless Sensor Networks: Technology, Protocols, and Applications

    Infrastructure for Homeland Security Environments
Wireless Sensor Networks helps readers discover the emerging field of low-cost standards-based sensors that promise a high order of spatial and temporal resolution and accuracy in an ever-increasing universe of applications. It shares the latest advances in science and engineering paving the way towards a large plethora of new applications in such areas as infrastructure protection and security, healthcare, energy, food safety, RFID, ZigBee, and processing.

Unlike other books on wireless sensor networks that focus on limited topics in the field, this book is a broad introduction that covers all the major technology, standards, and application topics. It contains everything readers need to know to enter this burgeoning field, including current applications and promising research and development; communication and networking protocols; middleware architecture for wireless sensor networks; and security and management.

The straightforward and engaging writing style of this book makes even complex concepts and processes easy to follow and understand. In addition, it offers several features that help readers grasp the material and then apply their knowledge in designing their own wireless sensor network systems:

Examples illustrate how concepts are applied to the development and application of

wireless sensor networks

Detailed case studies set forth all the steps of design and implementation needed to solve real-world problems

Chapter conclusions that serve as an excellent review by stressing the chapter's key concepts

References in each chapter guide readers to in-depth discussions of individual topics

This book is ideal for networking designers and engineers who want to fully exploit this new technology and for government employees who are concerned about homeland security. With its examples, it is appropriate for use as a coursebook for upper-level undergraduates and graduate students.

Presents a comprehensive survey of the research developments in the field of wireless sensor networks. Includes networking protocols, medium access control, and routing and transport protocols. For researchers and practitioners.

About the Author

Kazem Sohraby, PhD, is Professor of Electrical Engineering in the College of Engineering at the University of Arkansas. Dr. Sohraby has also served as head of the university's Department of Computer Science and Computer Engineering, and as Director of Telecommunications Management Department at Stevens Institute of Technology, Hoboken, New Jersey. Prior to his university appointment, Dr. Sohraby spent much of his career at Bell Labs Advanced Communication Technologies Center. His work resulted in more than twenty new patents for Bell Labs.

Daniel Minoli has worked and published extensively in the field of IT security, with more than thirty years of hands-on experience in IT, telecommunications, wireless, and networking. He has helped develop systems and solutions for such organizations as Advanced Research Projects Agency (ARPA) think tanks, Bell Telephone Laboratories, ITT, Prudential Securities, Telcordia (Bell Communications Research), AT&T, Leading Edge Networks, Capital One Financial, SES Americom, New York University, Rutgers University, Stevens Institute of Technology, and Société Générale de Financement du Québec. His columns have been published in Computerworld, Network World, and Network Computing.

Taieb Znati, PhD, is a Professor in the Department of Computer Science at the University of Pittsburgh. Dr. Znati's recent work focuses on the design and analysis of network protocols for wired and wireless communications, sensor networks, network security, agent-based technology with collaborative environments, and middleware.

抓虾-Self-Similar Processes in Telecommunications

2007-06-16T13:13:00.001+08:00
    你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：


Self-Similar Processes in Telecommunications


For the first time the problems of voice services self-similarity are discussed systematically and in detail with specific examples and illustrations.

'Self-Similar Processes in Telecommunications' considers the self-similar (fractal and multifractal) models of telecommunication traffic and efficiency based on the assumption that its traffic has fractal or multifractal properties (is self-similar). The theoretical aspects of the most well-known traffic models demonstrating self-similar properties are discussed in detail and the comparative analysis of the different models' efficiency for self-similar traffic is presented.

This book demonstrates how to use self-similar processes for designing new telecommunications systems and optimizing existing networks so as to achieve maximum efficiency and serviceability. The approach is rooted in theory, describing the algorithms (the logical arithmetical or computational procedures that define how a task is performed) for modeling these self-similar processes. However, the language and ideas are essentially accessible for those who have a general knowledge of the subject area and the advice is highly practical: all models, problems and solutions are illustrated throughout using numerous real-world examples.

Adopts a detailed, theoretical, yet broad-based and practical mathematical approach for designing and operating numerous types of telecommunications systems and networks so as to achieve maximum efficiency

Places the subject in context, describing the current algorithms that make up the fractal or self-similar processes while pointing to the future development of the technology

Offers a comparative analysis of the different types of self-similar process usage within the context of local area networks, wide area networks and in the modeling of video traffic and mobile communications networks

Describes how mathematical models are used as a basis for building numerous types of network, including voice, audio, data, video, multimedia services and IP (Internet Protocol) telephony

The book will appeal to the wide range of specialists dealing with the design and exploitation of telecommunication systems. It will be useful for the post-graduate students, lecturers and researchers connected with communication networks disciplines.

About the Author

Oleg I. Sheluhin is Head of Department of the Radio Engineering and Systems department of Moscow State Technical University of Service (MSTUS). He specializes in the areas of statistical radio engineering, radio systems theory and information systems simulation.

Sergey M. Smolskiy is Head of the Department of Radio Receivers in the Moscow Power Engineering Institute (MPEI). He has extensive experience in the field of telecommunications and is an active member of IEEE. His recent research topics include low distance radar systems and radio measuring systems.

Andrey V. Osin is currently Assistant Professor in the Department of Radio Engineering and Radio Systems at MSTUC. His PhD thesis focused on imitation modeling of self-similar processes in telecommunications and he has since published widely on the subject in numerous articles and conference journals.

抓虾-The Design and Analysis of Algorithms (Monographs in Computer Science)

2007-06-11T12:39:00.001+08:00
    你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：


The Design and Analysis of Algorithms (Monographs in Computer Science)

     The design and analysis of algorithms is one of the two essential cornerstone topics in computer science (the other being automata theory/theory of computation). Every computer scientist has a copy of Knuth's works on algorithms on his or her shelf. Dexter Kozen, a researcher and professor at Cornell University, has written a text for graduate [...]

抓虾-MIMO System Technology for Wireless Communications

2007-06-08T17:00:00.001+08:00
    你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：


MIMO System Technology for Wireless Communications

     Hardcover: 400 pages Publisher: CRC (March 28, 2006) Language: English ISBN-10: 0849341906 This book assembles coverage on all aspects of MIMO technology along with up-to-date information on key related issues. Contributors from leading academic and industrial institutions across the globe share their expertise and lend the book a global perspective. Share This

抓虾-MIMO System Technology for Wireless Communications (Electrical Engineering and Applied Signal Pro

2007-06-05T16:27:00.001+08:00
    你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：


MIMO System Technology for Wireless Communications (Electrical Engineering and Applied Signal Processing)

    Use of multiple antennas at both ends of wireless links is the result of the natural progression of more than four decades of evolution of adaptive antenna technology. Recent advances have demonstrated that multipleinput-multiple-output (MIMO) wireless systems can achieve impressive increases in overall system performance. The potential to provide the next major leap forward for wireless communications has led this technology to becoming the next frontier of wireless communications. As a result, it has received the attention not only of the international R&D community, but also of the wireless communications industry. This is evidenced from the international standardization efforts in the context of UMTS (e.g., 3GPP) and IEEE 802.11 (for wireless LANs) and also in the context of proposals for next generation (4G and beyond) wireless systems.

This book, MIMO System Technology for Wireless Communications, is a compilation of the work of several authors. The goal is not only to provide a complete reference source for readers interested in MIMO systems, but also to provide up-to-date information on several key issues related to the technology. For this reason, considerable effort was made to cover most of the elements of the technology and the related issues, some of which are not currently treated in the available textbooks.

抓虾-Wiley.Digital.Data.Integrity.May.2007.eBook-BBL

2007-06-03T11:07:00.003+08:00
    你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：


Wiley.Digital.Data.Integrity.May.2007.eBook-BBL

    书名：数字数据完整性：从被动防护到主动管理的演化
作者： David B Little, Skip Farmer, Oussama El-Hilali
出版商：Wiley
发行日期：2007年5月18日
语言：英语
ISBN-10/ISBN-13：0470018275/978-0470018279
http://www.amazon.com/Digital-Data-...80747887&sr=1-1

抓虾-Wiley.Self.Similar.Processes.in.Telecommunications.Apr.2007.eBook-BBL

2007-06-03T11:07:00.002+08:00
    你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：


Wiley.Self.Similar.Processes.in.Telecommunications.Apr.2007.eBook-BBL

    书名：电信中的自相似过程
作者：Oleg Sheluhin, Sergey Smolskiy, Andrew Osin
出版商：Wiley
发行日期：2007年4月27日
语言：英语
ISBN-10/ISBN-13：0470014865 /978-0470014868
http://www.amazon.com/Self-Similar-...80749087&sr=1-1

抓虾-Wiley.Pattern.Oriented.Software.Architecture.Volume.4.May.2007.eBook-BBL

2007-06-03T11:07:00.001+08:00
    你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：


Wiley.Pattern.Oriented.Software.Architecture.Volume.4.May.2007.eBook-BBL

    书名：面向模式的软件体系结构：分布式计算的模式语言 (卷4)
作者：Frank Buschmann, Kevlin Henney, Douglas C. Schmidt
出版商：Wiley
发行日期：2007年5月11日
语言：英语
ISBN-10/ISBN-13：0470059028/978-0470059029
http://www.amazon.com/Pattern-Orien...80748545&sr=1-2

抓虾-Self-Similar Processes in Telecommunications

2007-06-03T10:52:00.001+08:00
    你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：


Self-Similar Processes in Telecommunications

    For the first time the problems of voice services self-similarity are discussed systematically and in detail with specific examples and illustrations. Self-Similar Processes in Telecommunications considers the self-similar (fractal and multifractal) models of telecommunication traffic and efficiency based on the assumption that its traffic has fractal or multifractal properties (is self-similar). The theoretical aspects of [...]

抓虾-Wireless Sensor Networks: Technology, Protocols, and Applications

2007-05-30T12:18:00.003+08:00
    你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：


Wireless Sensor Networks: Technology, Protocols, and Applications

    Infrastructure for Homeland Security Environments Wireless Sensor Networks helps readers discover the emerging field of low-cost standards-based sensors that promise a high order of spatial and temporal resolution and accuracy in an ever-increasing universe of applications. It shares the latest advances in science and engineering paving the way towards a large plethora of new applications in [...]

抓虾-TCP Performance over UMTS-HSDPA Systems

2007-05-30T12:18:00.001+08:00
    你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：


TCP Performance over UMTS-HSDPA Systems

    TCP Performance over UMTS-HSDPA Systems provides a comprehensive study of the effect of TCP both on achieved application bit rate performance and system capacity. The book describes how to reduce, with or without modification of TCP implementations, the effect of wireless networks on TCP. Emphasizing the effect of scheduling to improve TCP performance over wireless [...]

抓虾-IEEE 802 Wireless Systems: Protocols, Multi-Hop Mesh/Relaying, Performance and Spectrum Coexisten

2007-05-29T09:07:00.001+08:00
    你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：


IEEE 802 Wireless Systems: Protocols, Multi-Hop Mesh/Relaying, Performance and Spectrum Coexistence

    Throughout the next decade, 802 wireless systems will become an integral part of fourth generation (4G) cellular communication systems, where the convergence of wireless and cellular networks will materialize through support of interworking and seamless roaming across dissimilar wireless and cellular radio access technologies. IEEE 802 Wireless Systems clearly describes the leading systems, covering IEEE 802.11 WLAN, IEEE 802.15 WPAN, IEEE 802.16 WMAN systems' architecture, standards and protocols (including mesh) with an instructive approach allowing individuals unfamiliar with wireless systems to follow and understand these technologies. Ranging from digital radio transmission fundamentals, duplex, multiplexing and switching to medium access control, radio spectrum regulation, coexistence and spectrum sharing, this book also offers new solutions to broadband multi-hop networking for cellular and ad hoc operation. The book

Gives a comprehensive overview and performance evaluation of IEEE 802.11, 802.15 and 802.16

Includes a tutorial like introduction to the basics of wireless communication

Discusses challenges in mesh/multi-hop relaying networks and provides profound solutions for their realization with 802 Wireless Systems

Covers spectrum sharing on different levels and provides solutions for coexistence, cooperation and interworking of 802 Wireless Systems that are following the same or different standards, but share the same spectrum

Includes a detailed overview and introduction on cognitive radio and dynamic spectrum access

Accompanying website contains simulation software and provides slides of the figures and tables from the book ready for course presentation

This book is an essential text for advanced undergraduate students with a basic working knowledge of wireless communication, graduate students and engineers working in the field of wireless communications.

This book offers a reliable guide and the fundament for lectures on IEEE 802 Wireless Systems providing figures and tables ready to be downloaded for course presentation. Additionally, a complete implementation of an protocol emulator is offered for download to facilitate an understanding, visualization and performance evaluation of IEEE 802.11.

抓虾-Apress.Use.Case.Driven.Object.Modeling.with.UML.Jan.2007.eBook-BBL

2007-05-29T09:06:00.001+08:00
    你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：


Apress.Use.Case.Driven.Object.Modeling.with.UML.Jan.2007.eBook-BBL

    书名：UML中的用例驱动对象建模
作者：Doug Rosenberg, Matt Stephens
出版商：Apress
发行日期：2007年1月11日
语言：英语
ISBN-10/ISBN-13：1590597745/978-1590597743
http://www.amazon.com/Use-Case-Driv...80318761&sr=8-1

抓虾-Addison-Wesley - Object-Oriented Analysis and Design with Applications (3rd Edition)

2007-05-25T12:02:00.001+08:00
    你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：


Addison-Wesley - Object-Oriented Analysis and Design with Applications (3rd Edition)



TITLE : Object-Oriented Analysis and Design with Applications (3rd Edition) (Hardcover)
AUTHOR : by Grady Booch (Author), Robert A. Maksimchuk (Author), Michael W. Engel (Author),
Bobbi J. Young (Author), Jim Conallen (Author), Kelli A. Houston (Author)
PUBLISHER : Addison-Wesley Professional publisher
ISBN : 020189551X
EDITION : 3rd
PUB DATE : April 30, 2007
LANGUAGE : English

Object-Oriented Design with Applications has long been the essential
reference to object-oriented technology, which, in turn, has evolved to
join the mainstream of industrial-strength software development. In this
third edition–the first revision in 13 years–readers can learn to
apply object-oriented methods using new paradigms such as Java, the
Unified Modeling Language (UML) 2.0, and .NET. The authors draw upon
their rich and varied experience to offer improved methods for object
development and numerous examples that tackle the complex problems faced
by software engineers, including systems architecture, data acquisition,
cryptoanalysis, control systems, and Web development. They illustrate
essential concepts, explain the method, and show successful applications
in a variety of fields. You'll also find pragmatic advice on a host of
issues, including classification, implementation strategies, and
cost-effective project management. New to this new edition are:

- An introduction to the new UML 2.0, from the notation's most
fundamental and advanced elements with an emphasis on key changes
- New domains and contexts
- A greatly enhanced focus on modeling–as eagerly requested by
readers–with five chapters that each delve into one phase of the
overall development lifecycle.
- Fresh approaches to reasoning about complex systems
- An examination of the conceptual foundation of the widely
misunderstood fundamental elements of the object model, such as
abstraction, encapsulation, modularity, and hierarchy
- How to allocate the resources of a team of developers and mange the
risks associated with developing complex software systems
- An appendix on object-oriented programming languages This is the
seminal text for anyone who wishes to use object-oriented technology to
manage the complexity inherent in many kinds of systems.

URL: http://www.amazon.com/exec/obidos/tg/detail/-/020189551X/
(more…)

抓虾-Addison.Wesley.Object.Oriented.Analysis.and.Design.with.Applications.3rd.Edition.May.2007.eBook-B

2007-05-24T11:59:00.002+08:00
    你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：


Addison.Wesley.Object.Oriented.Analysis.and.Design.with.Applications.3rd.Edition.May.2007.eBook-BBL

    书名：关于程序的面向对象分析和设计
作者：Grady Booch等
出版商：Addison-Wesley Professional
发行日期：April 30, 2007
语言：英语
ISBN-10/ISBN-13：020189551X/978-0201895513
http://www.amazon.com/exec/obidos/tg/detail/-/020189551X/

抓虾-Wiley.Ultra.Wideband.Signals.and.Systems.in.Communication.Engineering.2nd.Edition.Mar.2007.eBook-

2007-05-24T11:59:00.001+08:00
    你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：


Wiley.Ultra.Wideband.Signals.and.Systems.in.Communication.Engineering.2nd.Edition.Mar.2007.eBook-LinG

    书名：通讯工程中的超宽带信号和系统
出版商：Wiley (第2版)
发行日期：2007年3月9日
语言：英语
ISBN-10：0470027630
ISBN-13：978-0470027639
http://www.amazon.com/Wideband-Sign...79930927&sr=1-1

抓虾-Auerbach.Multi.Objective.Optimization.in.Computer.Networks.Using.Metaheuristics.Mar.2007.eBook-BB

2007-05-12T21:09:00.003+08:00
    你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：


Auerbach.Multi.Objective.Optimization.in.Computer.Networks.Using.Metaheuristics.Mar.2007.eBook-BBL

    电子书：计算机网络中的多目标优化。
http://www.amazon.com/Multi-Objecti...s/dp/0849380847

抓虾-Auerbach.Wireless.Ad.Hoc.Networking.Mar.2007.eBook-BBL

2007-05-12T21:09:00.001+08:00
    你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：


Auerbach.Wireless.Ad.Hoc.Networking.Mar.2007.eBook-BBL

    电子书：Ad Hoc网络。
http://www.auerbach-publications.co...h/advsearch.asp

抓虾-Prentice.Hall.Fundamentals.of.WiMAX.Feb.2007.eBook-BBL

2007-05-08T14:43:00.001+08:00
    你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：


Prentice.Hall.Fundamentals.of.WiMAX.Feb.2007.eBook-BBL

    Jeffrey G. Andrews, Arunabha Ghosh, 和 Rias Muhamed 所著, Prentice.Hall 出版发行的图书: 《WiMAX基础:弄懂宽带无线网络技术(Fundamentals of WiMAX: Understanding Broadband Wireless Networking)》。
http://www.amazon.com/Fundamentals-...s/dp/0132225522

抓虾-Essential MATLAB for Engineers and Scientists, Third Edition

2007-04-26T21:43:00.001+08:00
    你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：


Essential MATLAB for Engineers and Scientists, Third Edition


书名:Essential MATLAB for Engineers and Scientists, Third Edition

作者：Brian Hahn, Dan Valentine
出版：Newnes publisher， 3rd 2007
ISBN：0750684178
格式：PDF；2.9MB；448页

下载链接/download link：
Rapidshare

抓虾-Wireless Networks: Multiuser Detection in Cross-Layer Design (Information Technology: Transmissio

2007-04-22T21:44:00.001+08:00
    你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：


Wireless Networks: Multiuser Detection in Cross-Layer Design (Information Technology: Transmission, Processing and Storage)

    Cross-layer design seeks to enhance the capacity of wireless networks significantly through the joint optimization of multiple layers in the network, primarily the physical (PHY) and medium access control (MAC) layers. Although there are advantages of such design in wireline networks as well, this approach is particularly advantageous for wireless networks due to the properties (such as mobility and interference) that strongly affect performance and design of higher layer protocols. This unique monograph is concerned with the issue of cross-layer design in wireless networks, and more particularly with the impact of node-level multiuser detection on such design. It provides an introduction to this vibrant and active research area insufficiently covered in existing literature, presenting some of the principal methods developed and results obtained to date. Accompanied by numerous illustrations, the text is an excellent reference for engineers, researchers and students working in communication networks.

Wireless networking is undergoing a transformation from what has been primarily a medium for supporting voice traffic between telephones, into what is increasingly becoming a medium for supporting traffic among a variety of digital devices transmitting media of many types (voice, data, images, video. etc.) Wireline networking underwent a similar transformation in the 1990s, which led to an enormous build-up in the capacity of such networks, primarily through the addition of new optical fiber, switches and other infrastructure. Creating a similar build-up in the capacity of wireless networks presents many challenges, including notably the scarcity of two of the principal resources for providing high capacity in wireless networks, namely power and bandwidth. Moreover, the physical nature of wireless communication channels themselves, involving such features as mobility, interference, and fading, adds to the challenge of providing high-quality multimedia communications to large groups of users.

抓虾-Network Management Fundamentals

2007-04-07T19:49:00.001+08:00
    你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：


Network Management Fundamentals


书名:Network Management Fundamentals

作者：Alexander Clemm
出版：Cisco Press publisher 2006-11
ISBN：1587201372
格式：PDF；4.4MB；240页

下载链接/download link：
Rapidshare

抓虾-MATFOR.v4.10.070328.in.Absoft.Fortran-TBEMATFOR.v4.10.070328.in.C.Plus.Plus-TBEMATFOR.v4.10.070

2007-04-04T20:15:00.001+08:00
    你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：


MATFOR.v4.10.070328.in.Absoft.Fortran-TBE MATFOR.v4.10.070328.in.C.Plus.Plus-TBE MATFOR.v4.10.070328.in.Lahey.Fortran-TBE MATFOR.v4.10.070328.in.NET-TBE MATFOR.v4.10.070328.in.Visual.Fortran-TBE

    MATFOR是一套计算和绘图函数库，分别用以提高Absoft Fortran，C++，Lahey Fortran，.NET，Visual Fortran环境下的编程能力，专为科技工作者和工程人员设计，库中的函数可以进行精确的计算，动态的将数据可视化，并且有效缩短了处理时间。其特性有：高级二维/三维可视化、实时动画、运行时间数据处理、电影式报告、Matlab式语法。
http://www.ancad.com/overview.html

抓虾-OFDM for Wireless Communications Systems

2007-03-26T22:13:00.001+08:00
    你好！
你的朋友"shenjun"（shenjun.pku@gmail.com）从抓虾网（http://www.zhuaxia.com/）给你推荐了一篇文章，内容如下：


OFDM for Wireless Communications Systems

    Written by leading authority Ramjee Prasad, this timely new work offers a complete understanding of OFDM technology and applications in wireless communications systems, placing emphasis on wireless LANs and PANs. OFDM is a key technology for beyond 3G communications, promising robust, high capacity, high speed wireless broadband multimedia networks. In this practical resource, established and new technologies are explained clearly and comprehensively, from OFDM basics to a detailed account of a new technique, hybrid OFDM CDMA slow frequency hopping.

My wireless (mobile) garden is full of flowers with varieties of flavors, for example,
CDMA, OFDM, and so forth.

Last year I realized my "OFDM flower" has become a "paragon" with the successful
completion of the work of of several masters, doctoral, and postdoctoral
candidates, for example Mohindar Jankiraman, Dusan Matic, Klaus Witrisal, Uma
Jha, Richard van Nee, Shinsuke Hara, Hiroshi Harada, and so on. Therefore, I
decided to put together in one place their interesting and valuable contributions,
particularly of those of Klaus, Jankiraman, Uma, and Richard.

Although I coauthored OFDM for Wireless Multimedia Communications with
Richard and Multicarrier Techniques for 4G Mobile Communications with Shinsuke,
this book is very different in that it presents an overview of the wireless local
area network (WLAN), wireless personal area network (WPAN), frequencydomain
channel model, a novel hybrid OFDM concept, and a practical OFDM
system.

Auerbach.Wireless.Mesh.Networking.Architectures.Protocols.and.Standards.Dec.2006.eBook-BBL

2007-03-14T12:22:00.001+08:00
Auerbach.Wireless.Mesh.Networking.Architectures.Protocols.and.Standards.Dec.2006.eBook-BBL AUERBACH出版的《无线网格网络结构协议和标准》。Pdf格式。 http://www.amazon.com/exec/obidos/tg/detail/-/0849373999/ ... Source: http://0daycheck.eastgame.net/0day/archives/97618_Auer.html

Lifehacker: 88 Tech Tricks to Turbocharge Your Day

2007-03-14T09:49:00.001+08:00
Lifehacker: 88 Tech Tricks to Turbocharge Your Day 书名:Lifehacker: 88 Tech Tricks to Turbocharge Your Day 作者：Gina Trapani 出版：Wiley 2007 ISBN：0470050659 格式：PDF；8.87MB；336页下载链接/download link： http://rapidshare.com/files/20466202/Wiley.Lifehacker.Dec.2006.rar.html ... Source: http://www.cnshare.org/index.php/2007/03/lifehacker/

Wiley Interscience Design and Analysis of Distributed Algorithms Oct 2006 eBook-BBL

2007-03-11T20:38:00.001+08:00
Wiley Interscience Design and Analysis of Distributed Algorithms Oct 2006 eBook-BBL Design and Analysis of Distributed Algorithms (c) by Wiley-Interscience publisher The PDF eBook with ISBN: 0471719978 and Pub Date: October 27, 2006 Was successfully packed into: 01 disks by size 2.88mb It became possible on: 03/04/2007 This text is based on a simple and fully reactive computational model that allows for intuitive comprehension and logical designs. The principles and techniques presented can be applied to any distributed computing environment ( e.g., distributed systems, communication networks, data networks, grid networks, internet, etc.). The text provides a wealth of unique material for learning how to design algorithms and protocols perform tasks efficiently in a distributed computing environment. ... Source: http://www.ebookshare.net/2007/03/09/wiley-interscience-design-and-analysis-of-distributed-algorithms-oct-2006-ebook-bbl/

Multicarrier Techniques for 4G Mobile Communications

2007-03-07T15:24:00.001+08:00
Multicarrier Techniques for 4G Mobile Communications At recent major international conferences on wireless communications, there have been several sessions on beyond third generation (3G) or fourth generation (4G) mobile communications systems, where modulation/demodulation and multiplexing/multiple access schemes related to multicarrier techniques have drawn a lot of attention. We often met at the conference venues and realized that no book covered the basics of multicarrier techniques to recent applications aiming at the 4G systems. Therefore, we decided to write a book on multicarrier techniques for 4G mobile communications systems. This book provides a comprehensive introduction to multicarrier techniques including orthogonal frequency division multiplexing (OFDM), putting much emphasis on the analytical aspects by introducing basic equations with derivations. This book will help solve many problems encounter... Source: http://www.pdfchm.com/book/multicarrier-techniques-for-4g-mobile-communications-6551/

Mobile Radio Networks: Networking and Protocols

2007-03-06T14:13:00.001+08:00
Mobile Radio Networks: Networking and Protocols The continuing growth of the Global System for Mobile Communications (GSM) based mobile telephones has brought with it increasingly rapid growth in interest in mobile communications interconnect problems and standards. For the rapid proliferation of mobile communications to be sustained without overloading the system, harmonization of the networks of the service providers is crucial. These considerations are at the heart of this timely and topical book, which focuses upon the issues of network standardization as well as upon the emerging new techniques. Focuses upon the issues of network standardization as well as upon the emerging new techniques. Building on the success of the first edition Mobile Radio Networks continues to be the authoritative text on the radio-related and network-oriented functions of the digital communications networks t... Source: http://www.pdfchm.com/book/mobile-radio-networks-networking-and-protocols-6534/

Signals and Systems with MATLAB Computing and Simulink Modeling 3rd Ed

2007-02-27T10:50:00.000+08:00
Signals and Systems with MATLAB Computing and Simulink Modeling 3rd Ed 书名：Signals and Systems with MATLAB Computing and Simulink Modeling 3rd Ed 作者：Steven T. Karris 出版：Orchard Publications; 3rd Edition 2006 ISBN：0974423998 格式：PDF；4.5MB; 650页下载链接/download link： http://rapidshare.com/files/16151421/Signals.and.Systems.with.MATLAB.rar ... Source: http://www.cnshare.org/index.php/2007/02/signals-systems-matlab-computing-simulink-modeling/

OFDM Wireless LANs: A Theoretical and Practical Guide - Sams

2007-02-27T10:42:00.000+08:00
eBooks Portal v4.0 » OFDM Wireless LANs: A Theoretical and Practical Guide - Sams

OFDM Wireless LANs: A Theoretical and Practical Guide - Sams
Contributed by Mr.Blue | 414 Views

OFDM Wireless LANs: A Theoretical and Practical Guide explores OFDM WLAN basics, including components of OFDM and multi-carrier WLAN standards. This book also provides a practical approach to OFDM by including software and hardware examples and detailed implementation explanations. And it defines and explains the mathematical concepts behind OFDM necessary for successful OFDM WLAN implementations.

Download here
Password : www.ebooksportal.org

Scientific and Engineering C++ : An Introduction with Advanced Techniques and Examples

2007-02-27T10:23:00.000+08:00
:: Xpressionsz - The eBooks Heaven » Scientific and Engineering C++ : An Introduction with Advanced Techniques and Examples

Scientific and Engineering C++ : An Introduction with Advanced Techniques and Examples
Posted by admin under Science And Engineering

Book Info
Brings the power of C++ to science and engineering programming. Builds on knowledge of both FORTRAN and C, the languages most familiar to scientists and engineers. DLC: C++ (Computer program language)

From the Inside Flap
Like many scientists and engineers, much of our work involves writing computer programs. Recently we have been writing those programs in C++. We think that our programs are better and that we can do better science and engineering with these programs because they are written in C++. We think you should try C++, and we wrote this book to help you get started.

C++ is one of several new languages that use a programming style called object-oriented programming. To write large programs that are correct, readable, modifiable, affordable, and efficient requires the same creative effort and persistence characteristic of other endeavors in science and engineering. Traditional programming languages, including FORTRAN and C, force us to communicate with the computer in a demeaningly simplistic manner. C++ and an object-oriented programming style elevate the communication to a more abstract level: They provide means for investing intellectual effort to produce better-quality programs and thus better-quality science and engineering, from a given programming project.

Learning C++ will be exciting. Although most of the programming ideas used in languages like FORTRAN, PASCAL, and C are still used in object-oriented programs, the new concepts reorganize the work. Like all new fields, object-oriented programming will seem foreign and exotic. C++ embodies a decade of new ideas from computer science backed up by practical experience. These new ideas will stimulate your thinking about programming and its role in your work. We hope you will find, as we have, that this new view changes programming from a tedious, albeit engaging, process to an intellectual enterprise more comparable to the processes we employ in other scientific and engineering work. Purpose

The purpose of this book is to teach you how to use C++ and the object-oriented programming style to produce better-quality programs, with an emphasis on scientific and engineering programs. Most such programs today are written in FORTRAN or C and without the benefit of any particular programming methodology. For small programs of strictly numerical content, FORTRAN or C may be adequate. However, larger programs and programs containing nonnumerical code are too expensive to understand, to revise, and to improve if written in FORTRAN or C. We present object-oriented programming as a design and programming style that addresses these problems and C++ as a programming language designed to allow efficient use of the object-oriented style. If you are still using FORTRAN or C in your programming, we invite you to explore a new world, the world of object-oriented programming in C++. Audience

Our book teaches object-oriented programming in C++, using examples from science and engineering. It is not a book about scientific computing or numerical analysis nor an introduction to programming. The book moves rapidly through the basic features and syntax of C++, material readily assimilated by an engineer or scientist experienced in programming or, indeed, by any experienced programmer. Our aim is to move quickly beyond syntax and rules to the more interesting and important concepts and techniques of object-oriented programming in C++. The latter part of the book applies the concepts and techniques developed to substantive examples. The examples are drawn primarily from science and engineering, but the concepts and techniques are broadly applicable.

http://rapidshare.de/files/15820708/Scientific_and_Engineering_C___-_Barton.djvu.html

Related ebooks:

Computational Engineering - Introduction to Numerical Methods
Writing Scientific Software: A Guide to Good Style
Writing Scientific Software: A Guide to Good Style
Discrete Signals and Inverse Problems: An Introduction for Engineers and Scientists
Introduction to programming in Python 2.4
Nanophysics and Nanotechnology : An Introduction to Modern Concepts in Nanoscience
Categories for Software Engineering
Introduction to Parallel Computing
Software Engineering
Beowulf Cluster Computing with Windows (Scientific and Engineering Computation)

Writing Scientific Software: A Guide to Good Style

2007-02-27T10:21:00.000+08:00
:: Xpressionsz - The eBooks Heaven » Writing Scientific Software: A Guide to Good Style

Writing Scientific Software: A Guide to Good Style
Posted by admin under Programming

The core of scientific computing is designing, writing, testing, debugging and modifying numerical software for application to a vast range of areas: from graphics, meteorology and chemistry to engineering, biology and finance. Scientists, engineers and computer scientists need to write good code, for speed, clarity, flexibility and ease of re-use. Oliveira and Stewart's style guide for numerical software points out good practices to follow, and pitfalls to avoid. By following their advice, readers will learn how to write efficient software, and how to test it for bugs, accuracy and performance. Techniques are explained with a variety of programming languages, and illustrated with two extensive design examples, one in Fortran 90 and one in C++: other examples in C, C++, Fortran 90 and Java are scattered throughout the book. This manual of scientific computing style will be an essential addition to the bookshelf and lab of everyone who writes numerical software.

http://rapidshare.com/files/17611570/_2006-09__0521675952_Writing_Scientific_Software_A_Guide_to_Good_Style.rar

Related ebooks:

Writing Scientific Software: A Guide to Good Style
The Elements of C++ Style
Software Evolution and Feedback: Theory and Practice
Scientific and Engineering C++ : An Introduction with Advanced Techniques and Examples
Investment Science

Code Craft: The Practice of Writing Excellent Code
The Best Software Writing I
Implementing the IEEE Software Engineering Standards
Scientific American May 2006
Coder to Developer: Tools and Strategies for Delivering Your Software

Numerical Simulations and Case Studies Using Visual C++.Net

2007-02-11T22:03:00.001+08:00
Numerical Simulations and Case Studies Using Visual C++.Net Master the numerical simulation process required to design, test and support mobile and parallel computing systems. An accompanying ftp site contains all the Visual C++ based programs discussed in the text to help readers create their own programs. With its focus on problems and solutions, this is an excellent text for upper-level undergraduate and graduate students, and a must-have reference for researchers and professionals in the field of simulations. More information about Visual C++ based programs can be found at: ftp: //ftp.wiley.com/public/sci_tech_med/numerical_simulations/ Numerical computing has come a long way since the discovery of the first computer in the early 1940s. Computers have brought changes to the world through their capability to handle and solve problems that we... Source: http://www.pdfchm.com/book/numerical-simulations-and-case-studies-using-visual-c-net-6224/

The Handbook of Ad hoc Wireless Networks

2007-02-10T13:38:00.001+08:00
The Handbook of Ad hoc Wireless Networks An ad hoc wireless network one without a well-defined infrastructure provides mobile communication capabilities for temporary situations, such as disaster recovery, conventions, military actions, and various healthcare and academic applications. This handbook provides comprehensive reference materials on ad hoc wireless networks, from the basic concepts, techniques, systems and protocols of wireless communication to the particulars [...]... Source: http://www.ebooksportal.org/2007/02/the-handbook-of-ad-hoc-wireless-networks.ebp

C++ Network Programming Volume.1 Mastering Complexity with ACE and Patterns

2007-02-08T20:09:00.001+08:00
C++ Network Programming Volume.1 Mastering Complexity with ACE and Patterns As networks, devices, and systems continue to evolve, software engineers face the unique challenge of creating reliable distributed applications within frequently changing environments. C++ Network Programming, Volume 1, provides practical solutions for developing and optimizing complex distributed systems using the ADAPTIVE Communication Environment (ACE), a revolutionary open-source framework that runs on dozens of hardware platforms [...]... Source: http://www.ebooksportal.org/2007/02/c-network-programming-volume1-mastering-complexity-with-ace-and-patterns.ebp

Data Networks IP and the Internet Protocols Design and Operation - John Wiley & Sons

2007-02-02T12:38:00.001+08:00
Data Networks IP and the Internet Protocols Design and Operation - John Wiley & Sons Data Networking is a capability that allows users to combine separate data bases, telecommunication systems, and specialised computer operations into a single integrated system, so that data communication can be handled as easily as voice messages. Data communications is the problem of getting information from one place to another reliably (secure both from channel disruptions [...]... Source: http://www.ebooksportal.org/2007/02/data-networks-ip-and-the-internet-protocols-design-and-operation-john-wiley-sons.ebp

Fundamentals of Wireless Communication - Cambridge University Press

2007-02-01T14:09:00.001+08:00
Fundamentals of Wireless Communication - Cambridge University Press The past decade has seen many advances in physical layer wireless communication theory and their implementation in wireless systems. This textbook takes a unified view of the fundamentals of wireless communication and explains the web of concepts underpinning these advances at a level accessible to an audience with a basic background inprobability and digital communication. [...]... Source: http://www.ebooksportal.org/2007/01/fundamentals-of-wireless-communication-cambridge-university-press.ebp

Essentials of Error Control Coding - Wiley

2007-02-01T14:08:00.001+08:00
Essentials of Error Control Coding - Wiley Rapid advances in electronic and optical technology have enabled the implementation of powerful error-control codes, which are now used in almost the entire range of information systems with close to optimal performance. These codes and decoding methods are required for the detection and correction of the errors and erasures which inevitably occur in digital information [...]... Source: http://www.ebooksportal.org/2007/01/essentials-of-error-control-coding-wiley.ebp

moodle open source course management system

2007-01-30T21:07:00.001+08:00
Moodle is a course management system (CMS) - a free, Open Source software package designed using sound pedagogical principles , to help educators create effective online learning communities. You can download and use it on any computer you have handy (including webhosts), yet it can scale from a single-teacher site to a 50,000-student University. This site itself is created using Moodle, so check out the Moodle Demonstration Courses or read the latest Moodle Buzz.

How to Do Everything with PHP and MySQL

2007-01-29T22:29:00.001+08:00
How to Do Everything with PHP and MySQL 书名：How to Do Everything with PHP and MySQL 作者：Vaswani 出版：McGraw-Hill 2005 ISBN：0072257954 格式：PDF；10MB；400页下载链接/download link： http://rapidshare.com/files/12969753/0072257954.rar ... Source: http://www.cnshare.org/index.php/2007/01/php-mysql/

Industrial Strength C++ - Prentice Hall

2007-01-29T16:35:00.001+08:00
Industrial Strength C++ - Prentice Hall This book greatly expands the public domain "Ellemtel" C++ coding standard. Guidelines have been carefully selected and consisely formulated to define a C++ coding standard that should be valid and usable for almost all programmers. Text and code examples explain each individual rule and recommendation. Adopting this book as the company C++ coding standard helps [...]... Source: http://www.ebooksportal.org/2007/01/industrial-strength-c-prentice-hall.ebp

History of Wireless - IEEE Press

2007-01-29T16:33:00.003+08:00
History of Wireless - IEEE Press Important new insights into how various components and systems evolved Premised on the idea that one cannot know a science without knowing its history, History of Wireless offers a lively new treatment that introduces previously unacknowledged pioneers and developments, setting a new standard for understanding the evolution of this important technology.Starting with the background-magnetism, electricity, [...]... Source: http://www.ebooksportal.org/2007/01/history-of-wireless-ieee-press.ebp

Handbook of Applied Cryptography - CRC Press

2007-01-29T16:33:00.001+08:00
Handbook of Applied Cryptography - CRC Press Cryptography, in particular public-key cryptography, has emerged in the last 20 years as an important discipline that is not only the subject of an enormous amount of research, but provides the foundation for information security in many applications. Standards are emerging to meet the demands for cryptographic protection in most areas of data communications. Public-key [...]... Source: http://www.ebooksportal.org/2007/01/handbook-of-applied-cryptography-crc-press.ebp

National Electrical Code(R) Handbook

2007-01-28T17:54:00.000+08:00
National Electrical Code(R) Handbook The National Electrical Code® is an internationally accepted safety code for electrical and power wiring. It specifies the minimum provisions necessary for protecting people and property from hazards arising from the use of electricity and electrical equipment. Anyone involved in any phase of the electrical industry must be aware of how to use and apply [...]... Source: http://www.xpressionsz.com/archives/6200

Special Edition Using Microsoft Office Outlook 2003

2007-01-28T14:57:00.001+08:00
Special Edition Using Microsoft Office Outlook 2003 This is the ONLY book you need to achieve maximum productivity when using this messaging and groupware application! Special Edition Using Microsoft Office Outlook 2003 is a business-focused guide to Microsoft Outlook. It focuses on maximizing user productivity with real-world techniques in real-world environments. Topics covered include using Outlook as a personal information manager; collaborating with calendars; staying organized with the Outlook Journal; using Outlook securely; working remotely with Exchange server; programming in Outlook; and using VBA in Outlook. The accompanying CD includes a FREE copy of Woody's Office Power Pack (WOPR) the #1 enhancement to Office. This software sells for $49.99 but you get it here for free with no obligations attached! About the Author Patricia Cardoza is an Exchang... Source: http://www.pdfchm.com/book/special-edition-using-microsoft-office-outlook-2003-6071/

A Short Introduction to Queueing Theory

2007-01-28T14:53:00.001+08:00
A Short Introduction to Queueing Theory This document covers the most important queueing systems with a single service center. Only some basics are mentioned for queueing networks.... Source: http://www.freetechbooks.com/about474.html If you no longer wish to receive message like this, please contact the sender.

Notes on Optimization

2007-01-27T21:44:00.001+08:00

Notes on Optimization Presents in a compact and unified manner, the main concepts and techniques of mathematical programming and optimal control to students having diverse technical backgrounds.... Source: http://www.freetechbooks.com/about483.html If you no longer wish to receive message like this, please contact the sender.

Quantitative System Performance - Computer System Analysis Using Queueing Network Models

2007-01-27T21:34:00.001+08:00

Quantitative System Performance

Computer System Analysis Using Queueing Network Models

Edward D. Lazowska, John Zahorjan,
G. Scott Graham, Kenneth C. Sevcik

This text was published by Prentice-Hall, Inc., in 1984. It remains the definitive work on analytic modelling of computer systems. The publisher has returned the copyright to the authors, who make the material available here for viewing or downloading, in Adobe Acrobat PDF format (free Acrobat reader available here).

START HERE -- The easiest way to access the book online is through the hyperlinked Table of Contents available through this link.

Want to download the entire text to your PC? 21MB zip file may be ftp'd here.

Contents
Preface
I. Preliminaries
1. An Overview of Queueing Network Modelling
2. Conducting a Modelling Study
3. Fundamental Laws
4. Queueing Network Model Inputs and Outputs

II. General Analytic Techniques
5. Bounds on Performance
6. Models with One Job Class
7. Models with Multiple Job Classes
8. Flow Equivalence and Hierarchical Modelling

III. Representing Specific Subsystems
9. Memory
10. Disk I/O
11. Processors

IV. Parameterization
12. Existing Systems
13. Evolving Systems
14. Proposed Systems

V. Perspective
15. Extended Applications
16. Using Queueing Network Modelling Software

VI. Appendices
17. Constructing a Model from RMF Data
18. An Implementation of Single Class, Exact MVA
19. An Implementation of Multiple Class, Exact MVA
20. Load Dependent Service Centers

Index

Windows Developer Power Tools - O’Reilly

2007-01-27T20:47:00.001+08:00
Windows Developer Power Tools - O'Reilly Software developers need to work harder and harder to bring value to their development process in order to build high quality applications and remain competitive. Developers can accomplish this by improving their productivity, quickly solving problems, and writing better code.A wealth of open source and free software tools are available for developers who want [...]... Source: http://www.ebooksportal.org/2007/01/27/windows-developer-power-tools-oreilly/ If you no longer wish to receive message like this, please contact the sender.

Microsoft.Press.Code.Complete.2nd.Edition.June.2004.CHM.ebook-FOS

2007-01-25T22:34:00.001+08:00
This item was sent to you by shenjun.pku@gmail.com from Google Reader. Microsoft.Press.Code.Complete.2nd.Edition.June.2004.CHM.ebook-FOS Microsoft发布的《代码大全》第二版，CHM格式的电子书籍。 ISBN: 0-7356-1967-0 页码：960页... Source: http://0daycheck.eastgame.net/0day/archives/92531_Micr.html If you no longer wish to receive message like this, please contact the sender. Try Google Reader today: http://www.google.com/reader/

Network Coding Theory - Now Publishers

2007-01-25T19:36:00.001+08:00
Network Coding Theory - Now Publishers
Network Coding Theory provides a tutorial on the basic of network coding theory. It presents the material in a transparent manner without unnecessarily presenting all the results in their full generality. Store-and-forward had been the predominant technique for transmitting information through a network until its optimality was refuted by network coding theory. Network [...]

Operating Systems: Design and Implementation (Second Edition) - Prentice Hall

2007-01-25T11:47:00.001+08:00
Operating Systems: Design and Implementation (Second Edition) - Prentice Hall
Most books on operating systems deal with theory while ignoring practice While the usual principles are covered in detail, the book describes a small, but real UNIX-like operating system: MINIX The book demonstrates how it works while illustrating the principles behind it Operating Systems: Design and Implementation Second Edition provides the MINIX source code The relevant selections of the MINIX code are described in detail...

Content Distribution Networks: An Engineering Approach

2007-01-24T20:23:00.001+08:00
Content Distribution Networks: An Engineering Approach
Content distribution networks (CDNs) are the most promising new techniques for coping with the huge and swiftly growing volume of Internet traffic. In essence, CDNs are groups of proxy-servers located at strategic points around the Internet and arranged so as to ensure that a download request can always be handled from the nearest server. In this, the first reference in the field, a recognized CDN pioneer describes the various technologies involved and explains how they came together to form a working system. With the help of case studies, he covers all the practical basics and provides invaluable implementation schemes.

Describes the various technologies involved and explains how they cam together to form a working system. With the help of case studies, the author covers all the practical basics and provides invaluable implementation schemes.

A thorough exploration of content distribution networks and their applications
The exponential growth of Internet traffic has created a huge demand for techniques that improve the speed and efficiency of data delivery. One of the most important emerging approaches in this area is the use of a content distribution network (CDN), which involves employing several distributed sites to improve the scalability and responsiveness of applications. Written for network operators, ISPs, network architects, researchers, and advanced computer science students alike, here is a much-needed comprehensive overview of the fundamentals of a content distribution network. It describes the components that make up a CDN, delineates the different technologies that can be used within the network, and illustrates how several Web-based applications can be accelerated using a CDN.

The book covers such key topics as:

Basic architecture for content distribution networks

Applying CDNs to different business environments

Schemes to improve the scalability of a server site

Commonly deployed load-balancing techniques (including domain name—based techniques)

Performance monitoring

Managing the integrity and consistency of data

Different interconnection arrangements within a CDN

Managing security and trust relationships within the network

Comparisons with application layer ad hoc content distribution networks such as Napster and Gnutella

Both an "under-the-hood" look at how CDNs work and a guide to practical applications of CDN technologies, Content Distribution Networks: An Engineering Approach is a must-have reference for anyone who operates a Web site, manages an intranet, or needs to master this rapidly emerging, powerful new technology.

About the Author
Dinesh C. Verma is Manager of the Enterprise Networking Group at the IBM T. J. Watson Research Center, Yorktown Heights, New York. He received his PhD from the University of California, Berkeley, and holds more than ten patents in the area of computer networking. A widely published expert in the field, Dr. Verma is the author of Policy-Based Networking: Architecture and Algorithms and Supporting Service Level Agreements on IP Networks. He is also an active member of the IETF and the ATM Forum.

Mobile Agents for Telecommunication Applications

2007-01-24T20:22:00.003+08:00
Mobile Agents for Telecommunication Applications

Provides an overview of how the mobile code can be used in networking with the aim of developing further intelligent information retrieval, network and mobility management, and network services.

Proceedings of the Second International Workshop, MATA, on Mobile Agents for Telecommunication Applications, held in Paris, France, September 18-20, 2000. Major paper topics included network management, Ad-hoc networks and applications, and active networks.

This publication is concerned with mobile agents for telecommunication applications. Papers have been selected from those presented during MATA'00 in Paris, the MATA reviewers having reviewed this second version of the papers presented here.

Mobile agents refer to self-contained and identifiable computer programs that can move within the network and can act on behalf of the user or another entity. Most current research work on the mobile agent paradigm has two general goals: reduction of network traffic and asynchronous interaction. These two goals stem directly from the desire to reduce information overload and to efficiently use network resources.

There are certainly many motivations for the use of a mobile agent paradigm. However, intelligent information retrieval, network and mobility management, and network services are currently the three most cited application targets for a mobile agent system.

We provide in this publication an overview of how mobile codes could be used in networking. A huge field of application is now open and a research community really exists. We have tried here to illustrate this emerging application domain of mobile agents and mobile code.

Error Correcting Coding and Security for Data Networks: Analysis of the Superchannel Concept

2007-01-24T20:22:00.001+08:00
Error Correcting Coding and Security for Data Networks: Analysis of the Superchannel Concept
"…a comprehensive view of error coding theory and explores its use and implementation at all network layers…"
(Computing Reviews.com, February 1, 2006)

This book provides a systematic approach to the problems involved in the application of error-correcting codes in data networks.

Over the last two decades the importance of coding theory has become apparent. Thirty years ago developers of communication systems considered error-correcting coding to be somewhat exotic. It was considered as an area of interest only for mathematical engineers or mathematicians involved in the problems of engineering. Today however, theory is an important part of any textbook on communications, and the results of coding theory have become standards in data communication. The increasing demand for communications quality and the progress in information technologies has led to the implementation of error-correcting procedures in practice and an expansion in the area of error-correcting codes applications.

Error correcting coding is often analyzed in terms of its application to the separate levels within the data network in isolation from each other. In this fresh approach, the authors consider the data network as a superchannel (a multi-layered entity) which allows error correcting coding to be evaluated as it is applied to a number of network layers as a whole. By exposing the problems of applying error correcting coding in data networks, and by discussing coding theory and its applications, this original technique shows how to correct errors in the network through joint coding at different network layers.

Discusses the problem of reconciling coding applied to different layers using a superchannel approach

Includes thorough coverage of all the key codes: linear block codes, Hamming, BCH and Reed-Solomon codes, LDPC codes decoding, as well as convolutional, turbo and iterative coding

Considers new areas of application of error correcting codes such as transport coding, code-based cryptosystems and coding for image compression

Demonstrates how to use error correcting coding to control such important data characteristics as mean message delay

Provides theoretical explanations backed up by numerous real-world examples and practical recommendations

Features a companion website containing additional research results including new constructions of LDPC codes, joint error-control coding and synchronization, Reed-Muller codes and their list decoding

By progressing from theory through to practical problem solving, this resource contains invaluable advice for researchers, postgraduate students, engineers and computer scientists interested in data communications and applications of coding theory.

Network Algorithmics: An Interdisciplinary Approach To Designing Fast Networked Devices - Morgan

2007-01-24T20:19:00.001+08:00
Network Algorithmics: An Interdisciplinary Approach To Designing Fast Networked Devices - Morgan Kaufmann
In designing a network device, you make dozens of decisions that affect the speed with which it will performsometimes for better, but sometimes for worse. Network Algorithmics provides a complete, coherent methodology for maximizing speed while meeting your other design goals.Author George Varghese begins by laying out the implementation bottlenecks that are most often encountered [...]

Operating Systems: Design and Implementation (Second Edition) - Prentice Hall

2007-01-24T20:18:00.003+08:00
Operating Systems: Design and Implementation (Second Edition) - Prentice Hall
Most books on operating systems deal with theory while ignoring practice. While the usual principles are covered in detail, the book describes a small, but real UNIX-like operating system: MINIX. The book demonstrates how it works while illustrating the principles behind it. Operating Systems: Design and Implementation Second Edition provides the MINIX source code. The [...]

Operating Systems Concepts - John Wiley & Sons

2007-01-24T20:18:00.001+08:00
Operating Systems Concepts - John Wiley & Sons
Celebrating its 20th anniversary, Silberschatz: Operating Systems Concepts, Sixth Edition, continues to provide a solid theoretical foundation for understanding operating systems. The Sixth Edition offers improved conceptual coverage and added content to bridge the gap between concepts and actual implementations. Threads has been added to this latest edition and includes coverage of Pthreads and Java [...]

Fundamentals of Project Management

2007-01-23T18:16:00.002+08:00

Fundamentals of Project Management

Quality Progress "It contains alot of wisdom at a small cost." --This text refers to the Paperback edition. Book Description In today's time-based and cost-conscious global business environment,...

This is a summary of this blog, more you can find in the blog !

Economists’ Mathematical Manual, 4th Edition

2007-01-23T18:16:00.001+08:00
Economists' Mathematical Manual, 4th Edition

书名：Economists' Mathematical Manual, 4th Edition 经济学家数学手册

作者：Knut Syds

Brain Storm: Tap into Your Creativity to Generate Awesome Ideas and Remarkable Results

2007-01-22T18:09:00.000+08:00
Brain Storm: Tap into Your Creativity to Generate Awesome Ideas and Remarkable Results

书名：Brain Storm: Tap into Your Creativity to Generate Awesome Ideas and Remarkable Results

作者：Jason Rich
出版：Career Press 2003
ISBN：1564146685
格式：CHM；5.6MB;187页

下载链接/download url：
http://rapidshare.com/files/12424718/1564146685.rar

Creative Design on Trucks

2007-01-22T11:15:00.001+08:00

Creative Design on Trucks

Communications Systems

2007-01-22T10:49:00.001+08:00

Communications Systems

A new edition that takes students to the cutting edge and back!
Extensively revised and updated, this new fourth edition of COMMUNICATION SYSTEMS is the most complete undergraduate textbook on the theories and principles behind today's most advanced communications systems.

New features include:

MATLAB computer experiments that demonstrate important aspects of communication theory

Expanded coverage of emerging digital technologies, such as digital subscriber line (DSL), carrierless amplitude modulation/phase modulation (CAP), and discrete multi-tone (DMT)

Dozens of examples that relate theory to real-world communication systems

Superbly organized, the text skillfully guides students through topics ranging from pulse modulation to passband digital transmission, and from random processes to error-control coding. Throughout, Haykin presents difficult concepts in language that students can easily understand.

让你真正了解世界的十本书

2007-01-21T14:50:00.001+08:00
让你真正了解世界的十本书
我们生活在这个纷繁的世界，面对变幻莫测的大自然和熙熙攘攘的人类，岂止有十万个为什么要问？因此，下面这十本书或许能帮助我们真正理解所身处的这个世界。
一、闯入神秘的世界 ——《梦的解析》(作者:弗洛伊德)

这本书原本计划于1899年出版，但是，一位颇富眼光的出版商看出了此书的价值，将它的出版定在具有纪念意义的1900年。

《梦的解析》作为一本具有划时代意义之作，其伟大之处并不在于对"性"的惊世骇俗的探讨，而恰恰是那些关于梦的独特、新颖的见解，引导人们推开"梦"这扇大门，第一次真正走进人类深藏的内心世界，发现无法被意识所控制的潜意识，竟然蕴含了如此丰富的心理内容和巨大的创造力。弗洛伊德用一种最理性的声音诉说了人类的无理性，从更深的层次上阐述了人类的生存状况。

有人评价说，尽管在弗洛伊德之前，潜意识问题就已若隐若现地在一些作品中流露，但就像利夫和布伦丹曾触及到美洲海岸一样，只有弗洛伊德证明了潜意识确实存在，并对其丰富多彩和惊恐可怖加以揭示，是这个领域的哥伦布。

弗洛伊德对20世纪人类的焦虑和梦魇从人性上进行了探讨，他所创立的精神分析学派成为20世纪最流行的人本主义心理学派，是哲学上法兰克福学派"批评理论"的重要渊源，今天，在超现实主义、自然主义、抽象主义的文学艺术作品中，我们都可以感受到它的巨大影响。

二、靠推论创造奇迹——《论运动物体的电动力学》(作者:爱因斯坦)

1905年，一位供职于瑞士国家专利局、名叫爱因斯坦的26岁德国人，在德国科学杂志《物理年报》上连续发表了三篇论文。其中《论运动物体的电动力学》，提出了根本有别于传统观念的空间、时间理论。

在《论运动物体的电动力学》中，爱因斯坦一改以往人们头脑中的观念，论证了时间和空间是相对的，只有独立于观察者之外的光速是个常数。爱因斯坦证明，当物体的速度接近光速时，其长度就会减小，质量就会增加，时间就会放慢。由此推论，假如物体的速度与光的速度相同时，其长度为0，质量不会再增加，而且时间也就停止了。

爱因斯坦根据这种不可能性得出了一个结论：任何物体都不会以光速和超过光速运动。这项被称为"相对论"的理论弥补了牛顿物理学长达两个世纪的不足，爱因斯坦将时间与空间相结合，创立了新的四维宇宙空间的学说。

1916年，阿尔贝特&S226;爱因斯坦发表了《广义相对论的基础》，完成了他对牛顿物理学的修正。这一次，爱因斯坦把"物质"的概念引入了他的相对论中，他认为，物质也是空间的一种属性，同样与时间密不可分。

相对论彻底改变了人们对时空观的认知，带来了整个物理学的革命。值得一提的是，尽管对于绝大多数人而言，相对论显然是一个艰深的理论，但爱因斯坦却一直没有放弃将它介绍给普通大众的努力。

相对论被认为是"人类思想史中最伟大的成就之一"，其中人们最熟悉的著名公式，E＝mc2，为人类掌握核技术打下了理论基础。在爱因斯坦的一生中，他一直被公认为本世纪最伟大的思想家。

三、因思考而更迷惘 ——《太阳照样升起》 (作者:海明威)

"一个人并不是生来要给打败的，你尽可以把他消灭掉，可就是打不败他。"——欧内斯特&S226;海明威

1926年，欧内斯特·海明威的小说《太阳照样升起》出版后，"迷惘的一代"这一称呼迅速被人们接受，这部小说被奉为当时青年人的《圣经》。使用海明威式的简短而厌世的语言成了人们交谈的时尚，而那种粗犷而敏感的叙事风格，同样为人们所喜爱。

《太阳照样升起》是作者最敏锐地捕捉到社会脉搏的作品。作为一位自传性很强的作家，海明威本身就是那些在战争严重摧残的道德环境中成长起来的青年中的一员。他参加过那场令人刻骨铭心的战争，他目睹了军功章在战后市场上被廉价出售，他身边的年轻人整日寻欢作乐，醉生梦死。这使海明威更加迷惘痛心。

《太阳照样升起》的原型是作者所处的包括作家、艺术家和需求刺激的社会名流的圈子。但它却写出了普通大众的真实的生存状态。

他笔下的人物，无法投身于任何伟大的事业，而只能在英勇的、壮美的、有时甚至是残酷的场景中寻求生存的意义。

"迷惘的一代"并非浑沌的一代，正因为思考，才会迷惘。纵观海明威一生作品中创造的主人公，也经历了一个由迷惘空虚到勇敢抗争的过程。事实上，"迷惘的一代"中的绝大多数人在十几年后，又投身到了为正义和生存而战的反法西斯斗争中。《太阳照样升起》敏锐而准确地捕捉到了时代精神，其意义已经远远超出了文学的范畴。

时至今日，读者仍然会被其中蕴含的苍凉所打动。

四、挣脱漩涡的方舟 ——《就业、利息和货币通论》(作者：凯恩斯)

"有一个基本心理法则，我们可以确信不疑。一般而论，当所得增加时，人们将增加其消费，但消费的增加，没有其所得增加得那么多。" ——J．M．凯恩斯

1929年，一场空前的经济危机席卷西方，使资本主义世界陷入了严重的萧条和失业的漩涡之中，股市的崩溃，使人们终生的积蓄在顷刻间化为乌有。但是，经济学家们仍然认为，资本主义制度是一个自我调节的系统，任何干预都是有害的。因此，在最初的几年，西方各国政府都采取了一种袖手旁观的态度，甚至坚信"繁荣近在咫尺"。

危机一发而不可收，1933年，西方国家的失业人口已达3千万，是1929年的5倍多。对于普通人而言，30年代初，找到一份工作，是最为迫切的一件事。人们在问：这场大萧条何时能够终结，怎样才能制止经济衰退？

在苦苦的期待之中，1936年，英国经济学家J．M．凯恩斯在其《就业、利息和货币通论》中，终于为挽救资本主义经济开出了"药方"。在书中，凯恩斯对各国政府自由放任的经济政策进行了猛烈的攻击。凯恩斯断言，市场不是万能的。在对大萧条进行了细致的研究后，凯恩斯提出了一国总产量和就业量取决于"有效需求"的理论。

他认为，增加资本的关键是增加需求，而这需要依靠大量、稳定的就业。失业的直接原因是社会对企业生产产品的需求不断减少，导致资本家不再增加投资，而引发就业减少，造成工人失业。消除失业的办法，在于实行国家干预。当货币政策刺激投资增长的力度不足以完全实现市场调节时，国家必须使用财政政策，把资金直接投资于"公共工程"，以便扩大内需。

《就业、利息和货币通论》是西方经济学一部里程碑式的著作，在西方国家引起了巨大的轰动，迅速被各国广泛采纳。凯恩斯甚至被誉为"经济学领域的哥白尼"。有人说："如果不读凯恩斯的著作，就没有资格谈论经济学。"事实证明，凯恩斯的经济学观点不但避免了大萧条中的资本主义经济所遭受灭顶之灾，而且在高经济增长、低失业率的五六十年代，凯恩斯主义及其衍生的宏观经济理论，被惊人地证明富有成效。

作为现代最有影响的经济学家，凯恩斯的《通论》在西方同《物种起源》和《资本论》相提并论，直至今天，它仍在为西方经济学提供着学术源泉。

五、存在着并自由着 ——《存在与虚无》（作者：保罗·萨特)

"我的位置将不是一个聚焦点，而是一个出发点。" ——让－保罗·萨特

1943年，法国思想家让－保罗&S226;萨特的《存在与虚无》一书，树立起存在主义的大旗，号召人们在危机中寻求自由和光明。从30年代起，萨特就被认为是一个社会的反抗者，一个"不断地以个人的名义和人们自由的名义向现代世界提出抗议，想恢复人的价值"的哲学家。

萨特的思想一生都在变化，但"人"和"自由"一直是他理论的出发点。在萨特看来，人之所以比物高贵，就是因为人可以自由决定自己的存在，自由地选择自己的本质。萨特说出了那个时代许多人的心理感受：世界令人失望，人生充满荒谬。但萨特并不因此绝望。他告诉人们，人类的希望在于，用自己的行动反抗荒诞的世界。因为人是自由的，人是一切价值的创造者，没有上帝，没有任何超人的力量，更没有任何他人能改变你的命运。人是成为英雄还是成为懦夫，全靠你自己去选择。每个人都应该自由地选择自己的道路，为自己的生活创造独特的价值。

在《存在与虚无》中，萨特以人为中心，号召人们在无法改变的情境下，通过自由选择不断创造自己的存在，承担自由的重负，对自己、对整个世界承担责任。这种哲学引起了饱受战争创伤、目睹人性惨遭践踏的迷惘的一代的强烈共鸣。成千上万的青年人自封为"存在主义者"，身穿"存在主义服装"，过"存在主义人生"。人们在咖啡馆里谈论存在主义、在剧院里观看存在主义。此前，还没有一种哲学思潮能够如此深入人心，存在主义运动从哲学和文学运动，扩展成了一场群众运动。

七、指出社会发展方向————《资本论》（作者：卡尔·马克思）

《资本论》的出版时间是1867-1894年。

马克思生前只看到"资本论"这一大部头著作的第一卷得以出版，他的赞助人恩格斯编辑出版了马克思起草的另外两卷。《资本论》揭示了资本主义是人类社会发展的一个丑陋阶段，资本家不可避免而且毫无道德的通过工资剥削压榨工人，来获取最大利润。马克思在这里深入地分析了商品,揭示了价值规律。

虽然马克思没能具体预知21世纪的资本主义和现代议会制政府基础上的自由富裕的社会，他没想到资产阶级也在学习<资本论>并正在克服自身危机和矛盾。但他通过分析商品社会后指出资本主义必然消亡等观点是多么有先见之明！

八、揭示危机的本源 ——《全球通史》（作者：斯塔夫里阿诺斯）

"人们十分自然地欢迎和采纳那些能提高生产率和生活水平的新技术，但是，人们却拒绝接受新技术所必需的社会变化。" ——斯塔夫里阿诺斯

世界文明是全人类的共有财富，然而，世界史研究，作为一门独立的学科，却始终没有摆脱以西方为中心的研究角度。因此，1970年，当斯塔夫里阿诺斯的《全球通史》出版时，格外引人注目。这部通史被认为是第一部由历史学家运用全球观点，囊括全球文明而编写的世界历史。

《全球通史》分为《1500年前的世界》和《1500年后的世界》两部分。作者认为，整个世界是一个不可分割的整体，因此，他将目光投向了那些对人类历史进程产生了巨大影响的历史事件，着重分析了各种历史事件之间的有机联系和相互作用。作者在记录西方文明发展的同时，同样对在儒家文化、阿拉伯文明等影响下的各国政治、经济、文化作了全面的分析，充分肯定了各民族对世界文明进程所作出的贡献。作者认为，1500年以前，各种文明是相对平行发展的，而在这之后，随着"发现新大陆"，各地区文明才真正走上了相互交流之路。

《全球通史》并不是简单地对人类文明的进程加以总结，它的精华在于，通过对历史现象的分析，对历史的发展提出了自己创造性的见解。作者对20世纪，尤其是第二次世界大战以来至70年代的这段历史给予了格外的关注。对于人类所面临的越来越多的社会问题，作者认为，其根源在于技术革命在全球范围内突飞猛进地发展，而社会革命却相对沉寂。正是这两种革命之间的时间滞差，使整个世界陷入了空前的危机。由于具有深刻的思想性和深厚的社会责任感，《全球通史》获得了极高的评价，被誉为当今社会的"救世箴言"。

九、破解时间的咒语 ——《时间简史》(斯蒂芬·霍金 )

"时间－空间在大爆炸奇点处开始，并会在大挤压奇点处或黑洞的一个奇点处结束。任何抛进黑洞的东西都会在奇点处被毁灭。" ——斯蒂芬·霍金

对于大多数人来说，1988年出版的一本科普读物《时间简史》，使他们开始知道斯蒂芬&S226;霍金，这位英国物理学家和宇宙论学者的名字。其实，早在1974年，霍金就曾使人为之侧目。当时他提出了一个令所有人震惊的结论。他断言，黑洞能够释放放射线。而根据科学界的"常识"，黑洞是一种假设的衰弱星体，其吸引力极强，甚至连光都无法摆脱其作用，怎么可能释放放射线呢？据说，霍金在牛津大学附近举行的一次天文学会议上所做的这番讲话曾把他的一位同行气得暴跳如雷。

事实上，霍金一直试图将爱因斯坦的相对论同量子理论综合起来，这也是爱因斯坦和其他科学家一直未能获得成功的领域。霍金提出的方程式有助于揭示，为什么宇宙在150亿年的时间里由一点扩展成无限，以及为什么它又以一种被称为"宇宙险境"的方式对其本身进行收缩。

因为他的研究，霍金被誉为本世纪继爱因斯坦后最重要的广义相对论学者和宇宙哲学家。

《时间简史》是一部讲述宇宙奥秘的科普读物，试图解答人类最古老的命题：时间是有始有终的吗？宇宙是无限的吗？在霍金展示给人们的新的宇宙图景中，他在经典物理学的框架内，证明了黑洞和大爆炸奇点的不可避免性；而在量子物理学的框架内，他研究的黑洞辐射理论证明，大爆炸的奇点不但被量子效应所抹平，而且宇宙正是起始于此。

十、聆听未来的召唤 ——《未来之路》(比尔·盖茨 )

"这是一个绝妙的生存时代，从来也没有过这么多的机会，让人

去完成从前根本无法做到的事情。"——比尔·盖茨

20世纪90年代，对于今天的我们来说，实在是太近了，近到来不及仔细地回味，近到看不清我们昨天所亲历的一切，会对未来产生怎样的影响。因此，选择比尔&S226;盖茨的《未来之路》，更主要的原因不是因为其非同凡响，而是它代表了对人类必将跨入信息时代的信念和对未来的憧憬。

提起盖茨，有人会带着复杂的表情说："哦，那个没有读完大学的家伙。"但是没有人会否认，这是一个富有传奇色彩的名字。45岁的盖茨已经在世界首富的宝座上坐了很长的时间。在短短20年内，从白手起家到拥有150亿美元的个人财产，与其说这是盖茨创造的奇迹，不如说是信息技术创造的奇迹。

简单的生产工具的运用，使人的手足得以延长；蒸汽、电力的使用，增强了人的体力；而信息技术的革命，拓展了人的视野，使个人的智力得以延伸。与工业时代相比，在信息时代，社会的生产和财富的积累方式都将发生翻天覆地的变化。而在世纪之交，人类也正在完成这两个时代的跨越。

在《未来之路》中，这位微软公司的总裁希望把他"对技术前景的展望，以及时不时冒出来的想法与这个时代共享"。盖茨详尽的阐述了"信息高速公路"对人类未来生活的影响。"更重要的是，我们可以对技术进步的优缺点都加以广泛的探讨，以便让社会成为一个整体……"。

来源：世界经理人文摘

Mathematics for Electrical Engineering and Computing

2007-01-20T15:39:00.001+08:00
Mathematics for Electrical Engineering and Computing

书名：Mathematics for Electrical Engineering and Computing

作者：Mary Attenborough
出版：Newnes 2003
ISBN：075065855X

下载链接/download link：
Rapidshare

How to Study, 2nd Edition

2007-01-20T15:38:00.000+08:00
How to Study, 2nd Edition

书名：How to Study, 2nd Edition (How to Study: Use Your Personal Learning Style to Help You Succeed When It Counts)

作者：Gail Wood
出版：Learning Express 2nd，2000
ISBN：157685308X
格式：208页；1,23MB
下载链接/download link：
Rapidshare

MatLab Programming

2007-01-20T15:29:00.001+08:00
MatLab Programming

书名：MatLab Programming

作者：David Kuncicky
出版：Prentice Hall 2003
ISBN：013035127X
格式：PDF; 1.9MB; 462KB;

下载链接/download link：
http://rapidshare.com/files/1428525/MLBProgram_muya.rar

MATLAB Programming for Engineers

2007-01-20T15:16:00.000+08:00
MATLAB Programming for Engineers

MATLAB Programming for Engineers

作者：Stephen J. Chapman
出版：Thomson-Engineering 2001
ISBN：0534390560
格式：PDF；2.3MB；496页

下载链接/download link：
http://rapidshare.com/files/9238014/Engineering_Mathlab_Programming.pdf.html

The Art of Software Architecture: Design Methods and Techniques - Wiley

2007-01-20T15:14:00.003+08:00
The Art of Software Architecture: Design Methods and Techniques - Wiley

* This innovative book uncovers all the steps readers should follow in order to build successful software and systems

* With the help of numerous examples, Albin clearly shows how to incorporate Java, XML, SOAP, ebXML, and BizTalk when designing true distributed business systems

* Teaches how to easily integrate design patterns into software design

* Documents all architectures in UML and presents code in either Java or C++

Download Here

Password: www.ebooksportal.org

朱威廉:我为什么不愿当Google中国总裁

2007-01-20T10:44:00.001+08:00

朱威廉:我为什么不愿当Google中国总裁

最近这个文章标题比较时髦, 我身边的不少朋友纷纷列举了很多不去出任Google中国总裁的理由.当然,还有些人没忘记顺便捎带上一句:"如果让我去做百度的总裁则会考虑."
　　我们必须注意的是,百度不但在技术领域正迅速缩短与Google的差距,与此同时,在市场占有量和本地化搜索方面已经遥遥领先.更令人担忧的是,Google似乎在品牌影响力方面也正在输给百度.譬如这句:"我为什么不愿当Google中国总裁"正在一些人当中蔓延.

　　其实,有很多公司的总裁是可以不当的.我希望Google的两位创始人和CEO要思考的是:为什么人家偏偏不当Google中国总裁?

　　既然百度已经成为纳斯达克上市公司,同样有着众多国外基金和境外投资者的支持,同样需要履行美国会计准则以及服从美国
证券管理委员会的监管条例.所以,我心中便没有了需要袒护谁的偏见.

　　我热爱Google,不但受益于Google Search,Google Earth,Gmail等极具人性化的产品,更曾经享受过其
股票从八十几美元一路飙升到三百多美元的喜悦.我认为Google不但是有史以来最伟大的企业之一,也将会持续的对互联网的进步以及科技的发展起到积极的推动作用.

　　我在网上看过Google中国总部办公环境的图片,其"吃喝玩乐"情况已经不亚于位于美国山景总部的程度了.再加上李老师公开的,反复不断的校园演讲以及一封又一封写给大学生的热情洋溢的信,Google其实已经在中国为自己储备了大量的人才.可是,已经正式进入中国市场将近两年的Google 为什么发展如此迟缓?究竟是什么阻挡了Google在中国前进的步伐?

　　我个人以为文化背景的差异和团队过于"技术"的组成不是 Google在中国难以超越竞争对手的理由.有一个事实是,除去Google CEO埃里克-施密特曾经来华外,两位天性好动的创始人赛吉-布林和拉里-佩奇却从未将脚踏入过中国.种种迹象表明,赛吉-布林和拉里-佩奇还在犹豫,或许是对Google中国策略依然不够坚定.

　　我记得两位创始人当年为与Yahoo争夺AOL欧洲业务,曾经在空中指令私人喷射客机掉头直飞伦敦,最终赢得了这场为Google日后迅速发展起到决定性的业务.将相同的重视和魄力拿到中国市场,百度也许就不会说五年后很难再看到Google了.

　　让百度暂时领跑并不可怕,对于Google来说致命的是失去中国――这个很快将成为全球最大份额的互联网市场.而没有了中国市场的有力保障 ,Google的全球化战略部署将落为空谈,其后果难以想象.

　　品牌也好,市场也好,渠道也好,归根结底只是一件事情:Google在中国尚未成功,继续发展仍需大批有识之士.Google需要对本地化经营现状和人才战略的具体落实保持高度重视和清醒,尽管Google已经确立起自己明确的企业文化,但这种文化意识上的成功尚未随着Google中国的成立来到中国.

　　美国人具有牛仔的精神,Google一贯秉持"精英歧视"的观点不断遴选人才,并以精英之间的相互欣赏维系着企业组织的微妙平衡,从而创造出企业高速成长的奇迹.从这个意义上说,Google是个企业文化的另类,它成功了,从一片强手中拔身而出.

　　但这种另类的文化在中国遭遇传统的现实哲学.中国的问题是"非患寡而患不均",精英之间的倾轧大于和谐.良性的竞争,对于物质主义的崇拜往往大于精神境界的不懈追求.Google的创新文化遭遇了千年中国的文化惰性.我们有理由担心,Google中国会在自己制造的文化迷宫中迷失方向,忘记了创新的涵义不仅仅是局限在技术层面的创新而已.在竞争对手的辘辘战车声中,最终沦为巨大的社会实验乌托邦,一批天才儿童的失乐园.

　　所有热爱Google的人都不愿意看到这点,但至少现在还没有人可以阻止这种趋势.所以人们宁可作为一名旁观者,指点江山的同时寄希望于绝世高手,给Google中国带来希望――可能这也是大多数人表示"不愿当Google中国总裁"的心理情结.

　　我相信赛吉-布林和拉里-佩奇两位创始人将很快的赶到中国助阵.我也愿意相信李先生或许有能力带领Google在中国开辟天地,收复失地.我甚至想建议,服务于Google中国的众多有志青年可以暂时把桌上琳琅满目的水果.零食和饮料放在一边,与此同时大声对百度发誓:如果拿不下中国第一,我们就再也不在上班的时候吃吃喝喝了.也许,Google中国现在所需要的不是美国山景总部的奢华,而是早期位于Palo Alto的Google第一个车库办公室的简陋.毕竟,苦难才是一个企业的财富.

　　至于那些嚷嚷着不肯去Google中国做总裁的人们,恭喜你们失去了一个与世界级的伟大企业共同作战,并且有可能改变历史的伟大机会.

　　作者:朱威廉,曾创办联美广告.榕树下,曾任盛大高级副总裁.现任天联世纪总裁 DoNews特稿

zz Wikipedia: OSI model

2007-01-19T22:15:00.001+08:00
Wikipedia: OSI model - Wikipedia, the free encyclopedia

OSI model

Jump to: navigation, search

OSI Model

7 Application layer

6 Presentation layer

5 Session layer

4 Transport layer

3 Network layer

2 Data link layer
LLC sublayer
MAC sublayer

1 Physical layer

It has been suggested that this article or section be merged with Open Systems Interconnection. ( Discuss)

The Open Systems Interconnection Reference Model ( OSI Reference Model or OSI Model for short) is a layered, abstract description for communications and computer network protocol design, developed as part of the Open Systems Interconnection initiative. It is also called the OSI seven layer model.

[ edit] Purpose

OSI Model
The OSI model divides the functions of a protocol into a series of layers. Each layer has the property that it only uses the functions of the layer below, and only exports functionality to the layer above. A system that implements protocol behaviour consisting of a series of these layers is known as a ' protocol stack' or 'stack'. Protocol stacks can be implemented either in hardware or software, or a mixture of both. Typically, only the lower layers are implemented in hardware, with the higher layers being implemented in software.

The OSI reference model
This OSI model is roughly adhered to in the computing and networking industry. Its main feature is in the interface between layers which dictates the specifications on how one layer interacts with another. This means that a layer written by one manufacturer can operate with a layer from another (assuming that the specification is interpreted correctly). These specifications are typically known as Requests for Comments or "RFC"s in the TCP/IP community. They are ISO standards in the OSI community.
Usually, the implementation of a protocol is layered in a similar way to the protocol design, with the possible exception of a 'fast path' where the most common transaction allowed by the system may be implemented as a single component encompassing aspects of several layers.
This logical separation of layers makes reasoning about the behavior of protocol stacks much easier, allowing the design of elaborate but highly reliable protocol stacks. Each layer performs services for the next higher layer and makes requests of the next lower layer. As previously stated, an implementation of several OSI layers is often referred to as a stack (as in TCP/IP stack).
The OSI reference model is a hierarchical structure of seven layers that defines the requirements for communications between two computers. The model was defined by the International Organization for Standardization in the ISO standard 7498-1. It was conceived to allow interoperability across the various platforms offered by vendors. The model allows all network elements to operate together, regardless of who built them. By the late 1980's, ISO was recommending the implementation of the OSI model as a networking standard.
Of course, by that time, TCP/IP had been in use for years. TCP/IP was fundamental to ARPANET and the other networks that evolved into the Internet. (For significant differences between TCP/IP and ARPANET, see RFC 871.)
Only a subset of the whole OSI model is used today. It is widely believed that much of the specification is too complicated and that its full functionality has taken too long to implement, although there are many people who strongly support the OSI model. [1]

[ edit] Description of OSI layers

OSI Model

Data unit Layer Function

Host
layers Data Application Network process to application

Presentation Data representation and encryption

Session Interhost communication

Segments Transport End-to-end connections and reliability

Media
layers Packets Network Path determination and logical addressing (IP)

Frames Data link Physical addressing (MAC & LLC)

Bits Physical Media, signal and binary transmission

[ edit] Layer 7: Application Layer

The Application layer provides a means for the user to access information on the network through an application. This layer is the main interface for the user(s) to interact with the application and therefore the network. Some examples of application layer protocols include Telnet, applications which use File Transfer Protocol (FTP), applications which use Simple Mail Transfer Protocol (SMTP) and applications which use Hypertext Transfer Protocol (HTTP). Applications built to utilize a protocol, such as FTP, should not be confused with the protocols themselves, which often reside at the session layer.

[ edit] Layer 6: Presentation Layer

The Presentation layer transforms data to provide a standard interface for the Application layer. MIME encoding, data compression , data encryption and similar manipulation of the presentation is done at this layer to present the data as a service or protocol developer sees fit. Examples: converting an EBCDIC-coded text file to an ASCII-coded file, or serializing objects and other data structures into and out of, e.g., XML.

[ edit ] Layer 5: Session Layer

The Session layer controls the dialogues (sessions) between computers. It establishes, manages and terminates the connections between the local and remote application. It provides for either duplex or half-duplex operation and establishes checkpointing, adjournment, termination, and restart procedures. The OSI model made this layer responsible for "graceful close" of sessions, which is a property of TCP, and also for session checkpointing and recovery, which is not usually used in the Internet protocols suite.

[ edit ] Layer 4: Transport Layer

The Transport layer provides transparent transfer of data between end users, thus relieving the upper layers from any concern while providing reliable data transfer. The transport layer controls the reliability of a given link through flow control, segmentation/desegmentation, and error control. Some protocols are state and connection oriented. This means that the transport layer can keep track of the packets and retransmit those that fail. The best known example of a layer 4 protocol is the Transmission Control Protocol (TCP). The transport layer is the layer that converts messages into TCP segments or User Datagram Protocol (UDP), Stream Control Transmission Protocol (SCTP), etc. packets.

[ edit ] Layer 3: Network Layer

The Network layer provides the functional and procedural means of transferring variable length data sequences from a source to a destination via one or more networks while maintaining the quality of service requested by the Transport layer. The Network layer performs network routing functions, and might also perform segmentation/desegmentation, and report delivery errors. Routers operate at this layer―sending data throughout the extended network and making the Internet possible (also existing at layer 3 (or IP) are switches). This is a logical addressing scheme �C values are chosen by the network engineer. The addressing scheme is hierarchical. The best known example of a layer 3 protocol is the Internet Protocol (IP).

[ edit ] Layer 2: Data Link Layer

The Data Link layer provides the functional and procedural means to transfer data between network entities and to detect and possibly correct errors that may occur in the Physical layer. The best known example of this is Ethernet. Other examples of data link protocols are HDLC and ADCCP for point-to-point or packet-switched networks and Aloha for local area networks. On IEEE 802 local area networks, and some non-IEEE 802 networks such as FDDI, this layer may be split into a Media Access Control (MAC) layer and the IEEE 802.2 Logical Link Control (LLC) layer. It arranges bits from physical layer into logical chunks of data, known as frames.
This is the layer at which the bridges and switches operate. Connectivity is provided only among locally attached network nodes forming layer 2 domains for unicast or broadcast forwarding. Other protocols may be imposed on the data frames to create tunnels and logically separated layer 2 forwarding domains.

[ edit ] Layer 1: Physical Layer

The Physical layer defines all the electrical and physical specifications for devices. This includes the layout of pins, voltages, and cable specifications. Hubs, repeaters, network adapters and Host Bus Adapters (HBAs used in Storage Area Networks) are physical-layer devices. The major functions and services performed by the physical layer are:

Establishment and termination of a connection to a communications medium.
Participation in the process whereby the communication resources are effectively shared among multiple users. For example, contention resolution and flow control .
Modulation, or conversion between the representation of digital data in user equipment and the corresponding signals transmitted over a communications channel. These are signals operating over the physical cabling (such as copper and fiber optic) or over a radio link.

Parallel SCSI buses operate in this layer. Various physical-layer Ethernet standards are also in this layer; Ethernet incorporates both this layer and the data-link layer. The same applies to other local-area networks, such as Token ring, FDDI, and IEEE 802.11, as well as personal area networks such as Bluetooth and IEEE 802.15.4.

[ edit] Interfaces

In addition to standards for individual protocols in transmission, there are also interface standards for different layers to talk to the ones above or below (usually operating-system�Cspecific). For example, Microsoft Windows' Winsock, and Unix's Berkeley sockets and System V Transport Layer Interface, are interfaces between applications (layers 5 and above) and the transport (layer 4). NDIS and ODI are interfaces between the media (layer 2) and the network protocol (layer 3).

[ edit] Examples

Layer Misc. examples TCP/IP suite SS7 AppleTalk suite OSI suite IPX suite SNA UMTS

# Name

7 Application HL7, Modbus, SIP, SSI HTTP, RIP, SMTP, SMPP, SNMP, FTP, Telnet, NFS, NTP, RTP ISUP, INAP, MAP , TUP, TCAP AFP FTAM, X.400, X.500, DAP
APPC

6 Presentation TDI, ASCII, EBCDIC, MIDI, MPEG MIME, XDR, SSL , TLS (Not a separate layer)
AFP ISO 8823, X.226

5 Session Named Pipes, NetBIOS, SAP, SDP Port numbering in TCP and UDP. Session establishment in TCP. Telnet part of text based application protocols. SIP. (Not a separate layer with standardized API.)
ASP, ADSP, ZIP, PAP ISO 8327, X.225 NWLink DLC?

4 Transport NetBEUI, nanoTCP, nanoUDP TCP, UDP, SCTP
ATP, NBP, AEP, RTMP TP0, TP1, TP2, TP3, TP4, OSPF SPX, RIP

3 Network NetBEUI, Q.931 IP, ICMP, IPsec, ARP, BGP MTP-3, SCCP DDP X.25 ( PLP), CLNP IPX
RRC (Radio Resource Control)

2 Data Link Ethernet, 802.11 (WiFi), Token Ring, FDDI, PPP, HDLC, Q.921, Frame Relay, ATM, Fibre Channel PPP, SLIP MTP-2 LocalTalk, TokenTalk, EtherTalk, AppleTalk Remote Access, PPP X.25 ( LAPB), Token Bus IEEE 802.3 framing, Ethernet II framing SDLC MAC (Media Access Control )

1 Physical RS-232, V.35, V.34, I.430, I.431, T1, E1, 10BASE-T, 100BASE-TX, POTS, SONET, DSL, 802.11b, 802.11g
MTP-1 RS-232, RS-422, STP, PhoneNet X.25 ( X.21bis, EIA/TIA-232, EIA/TIA-449, EIA-530, G.703)
Twinax PHY (Physical Layer)

[ edit] Humor

The 7 layer model is sometimes humorously extended to refer to non-technical issues or problems. A common joke is the 10 layer model, with layers 8, 9, and 10 being the "user", "financial", and "political" layers, or the "money", "politics", and "religion" layers. Similarly, network technicians will sometimes refer to "layer-eight problems", meaning problems with an end user and not with the network.

The OSI model has also been jokingly called the " Taco Bell model", since the restaurant chain has been known for their 7 layer burrito.

Dick Lewis uses an analogy of James Bond delivering classified messages to illustrate the seven-layer model.

[ edit] See also

TCP/IP model
Internet protocol suite
List of network protocols
OSI protocols
Node

[ edit] External links

ISO standard 7498-1:1994 ( ZIP format)
Cybertelecom ― Layered Model of Regulation
OSI Model Tutorial
OSI Model Tutorial in Flash
Computer Networks and Protocol ― The OSI Reference Model
OSI Reference Model ― The ISO Model of Architecture for Open Systems Interconnection PDF, Hubert Zimmermann, IEEE Transactions on Communications, vol. 28, no. 4, April 1980, pp. 425 - 432.

玩命记忆 Unknown

2007-01-19T21:03:00.001+08:00

◎中文　名　玩命记忆
◎片　　名　Unknown
◎年　　代　2006
◎国　　家　美国
◎类　　别　剧情
◎语　　言　英语/惊秫/ 神秘
◎字　　幕　暂无
◎ IMDB评分 6.2/10 (166 votes)
◎导　　演　Simon Brand
◎主　　演　Mel Rodriguez ....
　　　　　　Wilmer Calderon ....
　　　　　　詹姆斯·卡维泽 James Caviezel ....
　　　　　　凯文·查普曼 Kevin Chapman .... McGahey
　　　　　　Clayne Crawford .... Anderson
　　　　　　Brittany Delano .... Police Secretary
　　　　　　Amparo Grisales ....
　　　　　　Katie Harfield .... Operator 59 (voice)
　　　　　　Victoria Justice .... Erin
　　　　　　格雷戈·金尼尔 Greg Kinnear ....
　　　　　　布丽姬·穆娜 Bridget Moynahan ....
　　　　　　乔·潘托里亚诺 Joe Pantoliano ....
　　　　　　巴里·佩珀 Barry Pepper ....
　　　　　　Jeffrey Daniel Phillips .... Ray
　　　　　　David Selby ....
　　　　　　
◎简　　介　
剧情简介：

　五个陌生人在一间封闭的仓库里醒来，发现他们都已失去记忆，完全不记得自己是谁，也不知道如何到了这里。但随着时间的流逝，他们推断出五个人中有的是人质，有的是绑匪，而绑匪头目正赶过来准备杀死人质，于是一场你死我活的猜谜行动就在幽闭空间中展开

一栋废弃仓库中，五名男子从昏迷中醒来，发现被软禁在一起，但他们竟全都丧失了记忆！能唤醒记忆的线索只有一份过期报纸，及一具警察尸体，种种迹象显示他们跟一桩绑票案有关，但究竟是谁绑架了谁？彼此是敌是友？真相抽丝剥茧后，将出现令你意想不到的惊诧逆转！

幕后制作：

悬疑、斗智动作片《玩命记忆》，拥有坚强的演员阵容、精彩的故事情节、以及独一无二的视觉风格。编剧以「五个人在一个空间里」为基础，就交织出无限紧张刺激的剧情，五个人在一间偏远仓库里，经过了一阵激烈的扭打，打翻了一大桶有毒的化学物质，在吸入这些物质后，他们因此陷入昏迷，再次醒来后，每个人都已失去记忆，在无从得知自己身份的情况下，模糊的记忆逐渐浮现，原来这是一场绑架勒赎事件。就在这个房间里，每当发现线索就会牵动记忆，让这几个人之间的关係瞬间骤变…，记忆不断重组，究竟谁是谁？谁能及早想起，活下去的胜算就越大！

电影中的场景空间越有限，演员的表演张力就越大，饰演五名主角的演员各有特色，分别是《受难记》吉姆卡维佐、《爱在心里口难开》金奖提名的奎格柯尼尔、《骇客任务》乔潘多林诺、《抢救雷恩大兵》巴瑞派伯，与《超感应频率》杰瑞米西斯托，他们在片中极尽衝突和挑衅之能事，展现密闭空间中的猜忌与紧张气氛，将剧情带到惊爆刺激的高潮。

Electric Circuits (7th Edition)

2007-01-19T20:58:00.001+08:00
Electric Circuits (7th Edition)

Electric Circuits (7th Edition)
Author: James W. Nilsson / Susan Riedel
URL: http://www.amazon.com/exec/obidos/redirect?tag=songstech-20&path=ASIN%2F0131465929

=650) window.open('http://ec1.images-amazon.com/images/P/0131465929.01._SCLZZZZZZZ_V1083195340_.jpg');" onload="if(this.width>'650')this.width='650';" border="0">
Product Details
pages: 992 pages
Publisher: Prentice Hall
ISBN: 0131465929
Average Customer Review: =650) window.open('http://ec1.images-amazon.com/images/G/01/x-locale/common/customer-reviews/stars-2-0.gif');" onload="if(this.width>'650')this.width='650';" border="0"> Based on 51 review(s).
Format:
Size:
Supplier:
Summary:

Electric Circuits, Seventh Edition features a redesigned art program, a new four-color format, and 75% new or revised problems throughout. In the midst of these changes, the book retains the goals that have made it a best-seller: 1) To build an understanding of concepts and ideas explicitly in terms of previous learning; 2) To emphasize the relationship between conceptual understanding and problem solving approaches; 3) To provide readers with a strong foundation of engineering practices. Chapter topics include Circuit Variables; Circuit Elements; Simple Resistive Circuits; Techniques of Circuit Analysis; The Operational Amplifier; Inductors, Capacitors, and Mutual Inductance; Response of First-Order RL and RC Circuits; Natural and Step Responses of RLC Circuits; Sinusoidal Steady-State Analysis; and more. For anyone interested in circuit analysis.

Download:

http://rapidshare.de/files/16531139/ElectricCircuits_muya.rar

Software Engineering for Internet Applications - The MIT Press

2007-01-19T20:19:00.000+08:00

Software Engineering for Internet Applications - The MIT Press

After completing this self-contained course on server-based Internet applications software, students who start with only the knowledge of how to write and debug a computer program will have learned how to build web-based applications on the scale of Amazon.com. Unlike the desktop applications that most students have already learned to build, server-based applications have multiple simultaneous users. This fact, coupled with the unreliability of networks, gives rise to the problems of concurrency and transactions, which students learn to manage by using the relational database system.

After working their way to the end of the book, students will have the skills to take vague and ambitious specifications and turn them into a system design that can be built and launched in a few months. They will be able to test prototypes with end-users and refine the application design. They will understand how to meet the challenge of extreme business requirements with automatic code generation and the use of open-source toolkits where appropriate. Students will understand HTTP, HTML, SQL, mobile browsers, VoiceXML, data modeling, page flow and interaction design, server-side scripting, and usability analysis.

The book, which originated as the text for an MIT course, is suitable for classroom use and will be a useful reference for software professionals developing multi-user Internet applications. It will also help managers evaluate such commercial software as Microsoft Sharepoint of Microsoft Content Management Server.

Download Here

Password: www.ebooksportal.org

Satellite Communication Systems Cross-layer Design

2007-01-19T14:49:00.000+08:00

Giambene, Giovanni (Ed.)
2007, Approx. 350 p., Hardcover
ISBN: 978-0-387-36897-9

Due: June 2007

About this book

Satellite communication systems represent an important solution to integrate and to complement terrestrial systems, since satellites allow the following advantages: (i) easy fruition of both broadcast and multicast high bit-rate multimedia services; (ii) provision of backup communication services for users on a global scale; (iii) efficient support of high-mobility cellular users (e.g., users on trains, planes, etc.); (iv) support of broadband applications and services in rural and remote areas for both fixed and mobile users.

Multimedia traffic support, multicast and broadcast services are the driving forces for new satellite systems that are expected to provide services with comparable Quality of Service (QoS) levels of terrestrial systems. In particular, the interest is here on the Satellite UMTS system for mobile users and the DVB-S/DVB-S2/DVB-RCS networks for broadband fixed users. New satellite network architectures, protocol design, and adaptivity schemes are necessary to allow the support of prospected future services.

Satellite resources are costly and satellite communications impose special constraints with respect to terrestrial systems in terms of channel model, attenuation, propagation delays, fading, etc. The ISO/OSI reference standard is based on a layering paradigm, a strict modularity and layer independence. Such classical approach may lead to non-optimal performance in IP-based next-generation satellite communication systems. In this framework, an optimized cross-layer approach is needed where interactions even between non-adjacent protocol layers are employed.

This book provides significant knowledge on innovative radio resource management schemes for satellite communication systems that exploit lower layer adaptivity and the knowledge of layer 3 IP QoS support and transport layer behavior. This book is an interesting novelty since it integrates competencies considering all the parts of system design (i.e., propagation aspects, radio resource management, access protocols, network protocols, transport layer protocols, etc.) to cover both broadband and mobile satellite systems. A detailed analysis of cross-layer air interface design will be provided with new simulation results, proving that such approach can permit to guarantee high QoS levels for differentiated traffic classes and high utilization of air interface resources. Two scenarios will be addressed for cross-layer optimization issues, that is the satellite version of the terrestrial UMTS for mobile users (3GPP) and the DVB-S/-S2/-RCS air interface for broadband fixed transmissions (ETSI).

This book is intended as the outcome of the research results obtained during the last two years in the workpackage 2430 (SatNEx project, www.satnex.org) leaded by Dr. Giovanni Giambene - University of Sienna, Italy.

Table of contents

Part I: Resource Management Framework for Satellite Communications.- Introduction.- Activity in Satellite Resrouce Management.- QoS Requirements for Multimedia Services.- Cross-Layer Approaches for Resource Management.- Part II: Cross-Layer Techniques for Satellite-Dependent Layers.- Access Schemes and PAcket Scheduling techniques.- Call Admission Control.- Dynamic Bandwith Allocation.- Part III: Cross-Layer Techniques for Satellite-Independent Layers.- Resource Mangement and Network Layer.- Resource Mangement and Transport Layer.- Cross-Layer Methods and Standardization Issues.

Written for:

System engineers, satellite networks engineers, researchers and advanced students working and studying in the field of satellite communications

关于开源课程

2007-01-18T20:16:00.000+08:00
几年前就听说了MIT的open course，把他们的课件都放在网上供大家下载，今天看到一个blog上提到，台湾在搞这个的中文化，称为开放式课程计划，这边也有一个网站，是中国开放式教育资源共享协会，但只提供原版，没有翻译。不过话说回来，台湾搞的中文化，还是不太符合我的习惯，比如把data communication networks译为资料通信网。

testmail

2007-01-18T11:55:00.001+08:00

No content

《玩命记忆》(Unknown)[DVDRip] | 电影 → 动作 | VeryCD → 下载

2007-01-18T11:43:00.000+08:00
《玩命记忆》(Unknown)[DVDRip] | 电影 → 动作 | VeryCD → 下载: "中文名称：玩命记忆
英文名称：Unknown
资源类型：DVDRip
发行时间：2006年
电影导演：Simon Brand
电影演员：Mel Rodriguez ....
　　　　　Wilmer Calderon ....
　　　　　詹姆斯·卡维泽 James Caviezel ....
　　　　　凯文·查普曼 Kevin Chapman .... McGahey
　　　　　Clayne Crawford .... Anderson
　　　　　Brittany Delano .... Police Secretary
　　　　　Amparo Grisales ....
　　　　　Katie Harfield .... Operator 59 (voice)
　　　　　Victoria Justice .... Erin
　　　　　格雷戈·金尼尔 Greg Kinnear ....
　　　　　布丽姬·穆娜 Bridget Moynahan ....
　　　　　乔·潘托里亚诺 Joe Pantoliano ....
　　　　　巴里·佩珀 Barry Pepper ....
　　"

princeton关于通信系统最优化的课程

2007-01-17T17:15:00.000+08:00
http://www.princeton.edu/~chiangm/class.html

OFDM for Wireless Communications Systems

2007-01-17T17:00:00.000+08:00

OFDM for Wireless Communication systems

Written by leading authority Ramjee Prasad, this timely new work offers a
complete understanding of OFDM technology and applications in wireless
communications systems, placing emphasis on wireless LANs and PANs. OFDM is
a key technology for beyond 3G communications, promising robust, high
capacity, high speed wireless broadband multimedia networks. In this
practical resource, established and new technologies are explained clearly
and comprehensively, from OFDM basics to a detailed account of a new
technique, hybrid OFDM CDMA slow frequency hopping.

Resource.Management.in.Wireless.Networking

2007-01-17T16:48:00.000+08:00

Springer.Resource.Management.in.Wireless.Networking.Jan.2005.eBook-DDU
今天用google desktop搜索了自己的硬盘，发现收藏的电子书里面，这本书与最近研究的utility的相关度很高，看来还需要精读。

OSI Model
7	Application layer
6	Presentation layer
5	Session layer
4	Transport layer
3	Network layer
2	Data link layer LLC sublayer MAC sublayer
1	Physical layer

OSI Model
	Data unit	Layer	Function
Host layers	Data	Application	Network process to application
		Presentation	Data representation and encryption
		Session	Interhost communication
	Segments	Transport	End-to-end connections and reliability
Media layers	Packets	Network	Path determination and logical addressing (IP)
	Frames	Data link	Physical addressing (MAC & LLC)
	Bits	Physical	Media, signal and binary transmission

Layer		Misc. examples	TCP/IP suite	SS7	AppleTalk suite	OSI suite	IPX suite	SNA	UMTS
#	Name	Misc. examples	TCP/IP suite	SS7	AppleTalk suite	OSI suite	IPX suite	SNA	UMTS
7	Application	HL7, Modbus, SIP, SSI	HTTP, RIP, SMTP, SMPP, SNMP, FTP, Telnet, NFS, NTP, RTP	ISUP, INAP, MAP , TUP, TCAP	AFP	FTAM, X.400, X.500, DAP		APPC
6	Presentation	TDI, ASCII, EBCDIC, MIDI, MPEG	MIME, XDR, SSL , TLS (Not a separate layer)		AFP	ISO 8823, X.226
5	Session	Named Pipes, NetBIOS, SAP, SDP	Port numbering in TCP and UDP. Session establishment in TCP. Telnet part of text based application protocols. SIP. (Not a separate layer with standardized API.)		ASP, ADSP, ZIP, PAP	ISO 8327, X.225	NWLink	DLC?
4	Transport	NetBEUI, nanoTCP, nanoUDP	TCP, UDP, SCTP		ATP, NBP, AEP, RTMP	TP0, TP1, TP2, TP3, TP4, OSPF	SPX, RIP
3	Network	NetBEUI, Q.931	IP, ICMP, IPsec, ARP, BGP	MTP-3, SCCP	DDP	X.25 ( PLP), CLNP	IPX		RRC (Radio Resource Control)
2	Data Link	Ethernet, 802.11 (WiFi), Token Ring, FDDI, PPP, HDLC, Q.921, Frame Relay, ATM, Fibre Channel	PPP, SLIP	MTP-2	LocalTalk, TokenTalk, EtherTalk, AppleTalk Remote Access, PPP	X.25 ( LAPB), Token Bus	IEEE 802.3 framing, Ethernet II framing	SDLC	MAC (Media Access Control )
1	Physical	RS-232, V.35, V.34, I.430, I.431, T1, E1, 10BASE-T, 100BASE-TX, POTS, SONET, DSL, 802.11b, 802.11g		MTP-1	RS-232, RS-422, STP, PhoneNet	X.25 ( X.21bis, EIA/TIA-232, EIA/TIA-449, EIA-530, G.703)		Twinax	PHY (Physical Layer)

resources on communication

今天又开放了

gfw暂时开放

抓虾-The Best of Technology Writing 2006

抓虾-WiMAX: Technology for Broadband Wireless Access

抓虾-Algorithm Collections for Digital Signal Processing Applications using Matlab

抓虾-（长篇）明朝的那些事儿－历史应该可以写得好�碵989]

抓虾-Nature.in.Fragments.The.Legacy.of.Sprawl.eBook-EEn

抓虾-Wiley.QoS.Over.Heterogeneous.Networks.Jun.2007.eBook-BBL

抓虾-IGI.Global.Design.Pattern.Formalization.Techniques.Mar.2007.eBook-BBL

抓虾-IGI - Architectural Design of Multi-Agent Systems: Technologies and Techniques

抓虾-CRC.Press.Wireless.Ad.Hoc.and.Sensor.Networks.Apr.2007.eBook-BBL

抓虾-Next Generation SDH/SONET: Evolution or Revolution

抓虾-Wiley Encyclopedia of Telecommunications , 5 Volume Set

抓虾-Wiley Encyclopedia of Telecommunications , 5 Volume Set

抓虾-Excel for Scientists and Engineers: Numerical Methods

抓虾-Quantum Theory of Magnetism, 3rd Edition

抓虾-Experimental Aspects of Quantum Computing

抓虾-Pattern-Oriented Software Architecture Volume 4: A Pattern Language for Distributed Computing

抓虾-Wireless Sensor Networks: Technology, Protocols, and Applications

抓虾-Self-Similar Processes in Telecommunications

抓虾-The Design and Analysis of Algorithms (Monographs in Computer Science)

抓虾-MIMO System Technology for Wireless Communications

抓虾-MIMO System Technology for Wireless Communications (Electrical Engineering and Applied Signal Pro

抓虾-Wiley.Digital.Data.Integrity.May.2007.eBook-BBL

抓虾-Wiley.Self.Similar.Processes.in.Telecommunications.Apr.2007.eBook-BBL

抓虾-Wiley.Pattern.Oriented.Software.Architecture.Volume.4.May.2007.eBook-BBL

抓虾-Self-Similar Processes in Telecommunications

抓虾-Wireless Sensor Networks: Technology, Protocols, and Applications

抓虾-TCP Performance over UMTS-HSDPA Systems

抓虾-IEEE 802 Wireless Systems: Protocols, Multi-Hop Mesh/Relaying, Performance and Spectrum Coexisten

抓虾-Apress.Use.Case.Driven.Object.Modeling.with.UML.Jan.2007.eBook-BBL

抓虾-Addison-Wesley - Object-Oriented Analysis and Design with Applications (3rd Edition)

抓虾-Addison.Wesley.Object.Oriented.Analysis.and.Design.with.Applications.3rd.Edition.May.2007.eBook-B

抓虾-Wiley.Ultra.Wideband.Signals.and.Systems.in.Communication.Engineering.2nd.Edition.Mar.2007.eBook-

抓虾-Auerbach.Multi.Objective.Optimization.in.Computer.Networks.Using.Metaheuristics.Mar.2007.eBook-BB

抓虾-Auerbach.Wireless.Ad.Hoc.Networking.Mar.2007.eBook-BBL

抓虾-Prentice.Hall.Fundamentals.of.WiMAX.Feb.2007.eBook-BBL

抓虾-Essential MATLAB for Engineers and Scientists, Third Edition

抓虾-Wireless Networks: Multiuser Detection in Cross-Layer Design (Information Technology: Transmissio

抓虾-Network Management Fundamentals

抓虾-MATFOR.v4.10.070328.in.Absoft.Fortran-TBEMATFOR.v4.10.070328.in.C.Plus.Plus-TBEMATFOR.v4.10.070

抓虾-OFDM for Wireless Communications Systems

Auerbach.Wireless.Mesh.Networking.Architectures.Protocols.and.Standards.Dec.2006.eBook-BBL

Lifehacker: 88 Tech Tricks to Turbocharge Your Day

Wiley Interscience Design and Analysis of Distributed Algorithms Oct 2006 eBook-BBL

Multicarrier Techniques for 4G Mobile Communications

Mobile Radio Networks: Networking and Protocols

Signals and Systems with MATLAB Computing and Simulink Modeling 3rd Ed

OFDM Wireless LANs: A Theoretical and Practical Guide - Sams

Scientific and Engineering C++ : An Introduction with Advanced Techniques and Examples

Writing Scientific Software: A Guide to Good Style

Numerical Simulations and Case Studies Using Visual C++.Net

The Handbook of Ad hoc Wireless Networks

C++ Network Programming Volume.1 Mastering Complexity with ACE and Patterns

Data Networks IP and the Internet Protocols Design and Operation - John Wiley & Sons

Fundamentals of Wireless Communication - Cambridge University Press

Essentials of Error Control Coding - Wiley

moodle open source course management system

How to Do Everything with PHP and MySQL

Industrial Strength C++ - Prentice Hall

History of Wireless - IEEE Press

Handbook of Applied Cryptography - CRC Press

National Electrical Code(R) Handbook

Special Edition Using Microsoft Office Outlook 2003

A Short Introduction to Queueing Theory

Notes on Optimization

Quantitative System Performance - Computer System Analysis Using Queueing Network Models

Quantitative System Performance

Computer System Analysis Using Queueing Network Models

Edward D. Lazowska, John Zahorjan,G. Scott Graham, Kenneth C. Sevcik

Windows Developer Power Tools - O’Reilly

Microsoft.Press.Code.Complete.2nd.Edition.June.2004.CHM.ebook-FOS

Network Coding Theory - Now Publishers

Operating Systems: Design and Implementation (Second Edition) - Prentice Hall

Content Distribution Networks: An Engineering Approach

Mobile Agents for Telecommunication Applications

Error Correcting Coding and Security for Data Networks: Analysis of the Superchannel Concept

Network Algorithmics: An Interdisciplinary Approach To Designing Fast Networked Devices - Morgan

Operating Systems: Design and Implementation (Second Edition) - Prentice Hall

Edward D. Lazowska, John Zahorjan,
G. Scott Graham, Kenneth C. Sevcik