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this is a document about radio frequency identification RFID, this was a project ,i have done last year ,actually this technology is a very inpotrtant one due to its relation with newest technologies , like GPS , or the miniturization of integrated circuits ,and that is described in chapter 3 . chapter 1 gives an introduction of the technology RFID , chapter 2 gives a discussion of a library using RFID , and chapter 3 is about the future of RFID , and finally the conclusion .
標簽：
this
identification
frequency
document
上傳時間：
2014-01-10
上傳用戶：gtzj
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本書是英文版，但內容非常不錯，本書目錄如下：
Table of Contents
SIP—Understanding the Session Initiation Protocol, Second Edition
Foreword to the First Edition
Preface to - the Second Edition
Preface to - the First Edition
Chapter 1 - SIP and the Internet
Chapter 2 - Introduction to SIP
Chapter 3 - SIP Clients and Servers
Chapter 4 - SIP Request Messages
Chapter 5 - SIP Response Messages
Chapter 6 - SIP Header Fields
Chapter 7 - Related Protocols
Chapter 8 - Comparison to H.323
Chapter 9 - Wireless and 3GPP
Chapter 10 - Call Flow Examples
Chapter 11 - future Directions
Appendix A - Changes in the SIP Specification from RFC 2543 to RFC 3261
標簽：
英文
上傳時間：
2014-01-06
上傳用戶：爺的氣質
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Program helping you to remember the route.
It cab be route from conference room to coffee-room, it can be tourist trip, it can be pathway in labyrinth. during first traversal you make notes in you phone, specifying direction of movement and target of each step. Phone remembers how much time each steps takes. Then you can just inspect information about this trip and check duration of each stage and the whole trip. You can also replay it in forward and backward direction. So if somebody show you the shortest way to coffee machine, you can easily find the way back and can repeat this trip in future.
標簽：
route
coffee-room
conference
remember
上傳時間：
2014-01-05
上傳用戶：1159797854
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PhD research, you have already
made a decision that will have a major impact on the success of your
project, and perhaps even on your future career. You have chosen to
work in a particular research group, under the guidance of a particular
thesis advisor or supervisor.
標簽：
have
research
decision
already
上傳時間：
2017-09-14
上傳用戶：cursor
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Before you even get started on your PhD research, you have already
made a decision that will have a major impact on the success of your
project, and perhaps even on your future career. You have chosen to
work in a particular research group, under the guidance of a particular
thesis advisor or supervisor.
標簽：
have
you
decision
research
上傳時間：
2013-11-28
上傳用戶：asdfasdfd
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A MATLAB program has been written to investigate Orthogonal Frequency Division
Multiplexing (OFDM) communication systems. This program is valuable for future researchers
simulating systems that are too theoretically complex to analyze. Single-carrier QAM and multicarrier
OFDM are compared to demonstrate the strength of OFDM in multipath channels. Two
graphical user interface demonstrations show some of the basic concepts of OFDM.
標簽：
Multiplexing
investigate
Orthogonal
Frequency
上傳時間：
2013-12-09
上傳用戶：redmoons
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Lithium–sulfur (Li–S) batteries with high energy density and long cycle life are considered to be one of the most promising next-generation energy-storage systems beyond routine lithium-ion batteries. Various approaches have been proposed to break down technical barriers in Li–S battery systems. The use
of nanostructured metal oxides and sulfides for high sulfur utilization and long life span of Li–S batteries is reviewed here. The relationships between the intrinsic properties of metal oxide/sulfide hosts and electrochemical performances of Li–S batteries are discussed. Nanostructured metal oxides/ sulfides hosts used in solid sulfur cathodes, separators/interlayers, lithium- metal-anode protection, and lithium polysulfides batteries are discussed respectively. Prospects for the future developments of Li–S batteries with nanostructured metal oxides/sulfides are also discussed.
標簽：
電池
納米結構
硫化物
金屬氧化物
上傳時間：
2017-11-23
上傳用戶：653357637
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This book provides an overview of recent innovations and achievements in the broad areas of cyber-physical systems (CPS), including architecture, networking, systems, applications, security, and privacy. The book discusses various new CPS technologies from diverse aspects to enable higher level of innovation towards intelligent life. The book provides insight to the future integration, coordination and interaction between the physical world, the information world, and human beings. The book features contributions from renowned researchers and engineers, who discuss key issues from various perspectives, presenting opinions and recent CPS-related achievements.Investigates how to advance the development of cyber-physical systems
Provides a joint consideration of other newly emerged technologies and concepts in relation to CPS like cloud computing, big data, fog computing, and crowd sourcing
Includes topics related to CPS such as architecture, system, networking, application, algorithm, security and privacy
標簽：
Cyber-Physical
Systems
上傳時間：
2019-04-21
上傳用戶：danyun
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Abstract—In the future communication applications, users
may obtain their messages that have different importance levels
distributively from several available sources, such as distributed
storage or even devices belonging to other users. This
scenario is the best modeled by the multilevel diversity coding
systems (MDCS). To achieve perfect (information-theoretic)
secrecy against wiretap channels, this paper investigates the
fundamental limits on the secure rate region of the asymmetric
MDCS (AMDCS), which include the symmetric case as a special
case. Threshold perfect secrecy is added to the AMDCS model.
The eavesdropper may have access to any one but not more than
one subset of the channels but know nothing about the sources,
as long as the size of the subset is not above the security level.
The question of whether superposition (source separation) coding
is optimal for such an AMDCS with threshold perfect secrecy
is answered. A class of secure AMDCS (S-AMDCS) with an
arbitrary number of encoders is solved, and it is shown that linear
codes are optimal for this class of instances. However, in contrast
with the secure symmetric MDCS, superposition is shown to
be not optimal for S-AMDCS in general. In addition, necessary
conditions on the existence of a secrecy key are determined as a
design guideline.
標簽：
Fundamental
Limits
Secure
Class
on
of
上傳時間：
2020-01-04
上傳用戶：kddlas
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The world population is continuously growing and reached a significant evolution of
the society, where the number of people living in cities surpassed the number of people
in rural areas.
標簽：
Building
future
Cities
Smart
上傳時間：
2020-05-23
上傳用戶：shancjb
