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The goal of the present document is to give a starting point for people newly
interested in R. I chose to emphasize on the understanding of how R Works,
with the aim of a beginner, rather than expert use.
標(biāo)簽：
R
上傳時(shí)間：
2016-04-08
上傳用戶：mrchen...
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This chapter introduces concepts on cooperating objects and wireless sensor net-
Works that will be used in the following chapters. It also introduces the Embedded
WiSeNts Coordination Action. Finally, it presents an overview of the book and the
relations between the following chapters.
標(biāo)簽：
Cooperating
Embedded
Systems
上傳時(shí)間：
2020-05-27
上傳用戶：shancjb
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In case you haven’t noticed, multimedia communication over IP and wireless net-
Works is exploding. Applications such as BitTorrent, used primarily for video
downloads, now take up the lion’s share of all traffic on the Internet. Music file
sharing, once on the legal cutting edge of massive copyright infringement on col-
lege campuses around the world, has moved into the mainstream with signifi-
cant legal downloads of music and video to devices such as the iPod and nu-
merous other portable media players.
標(biāo)簽：
Multimedia
Over
IP
上傳時(shí)間：
2020-05-31
上傳用戶：shancjb
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The ever-increasing demand for private and sensitive data transmission over wireless net-
Works has made security a crucial concern in the current and future large-scale, dynamic,
and heterogeneous wireless communication systems. To address this challenge, computer
scientists and engineers have tried hard to continuously come up with improved crypto-
graphic algorithms. But typically we do not need to wait too long to find an efficient way
to crack these algorithms. With the rapid progress of computational devices, the current
cryptographic methods are already becoming more unreliable. In recent years, wireless re-
searchers have sought a new security paradigm termed physical layer security. Unlike the
traditional cryptographic approach which ignores the effect of the wireless medium, physi-
cal layer security exploits the important characteristics of wireless channel, such as fading,
interference, and noise, for improving the communication security against eavesdropping
attacks. This new security paradigm is expected to complement and significantly increase
the overall communication security of future wireless netWorks.
標(biāo)簽：
Communications
Physical
Security
Wireless
Layer
in
上傳時(shí)間：
2020-05-31
上傳用戶：shancjb
-
n the first part of this book, we give an introduction to the basic applications of wireless com-
munications, as well as the technical problems inherent in this communication paradigm. After a
brief history of wireless, Chapter 1 describes the different types of wireless services, and Works
out their fundamental differences. The subsequent Section 1.3 looks at the same problem from
a different angle: what data rates, ranges, etc., occur in practical systems, and especially, what
combination of performance measures are demanded (e.g., what data rates need to be transmitted
over short distances; what data rates are required over long distances?) Chapter 2 then describes
the technical challenges of communicating without wires, putting special emphasis on fading and
co-channel interference. Chapter 3 describes the most elementary problem of designing a wireless
system, namely to set up a link budget in either a noise-limited or an interference-limited system.
After studying this part of the book, the reader should have an overview of different types of
wireless services, and understand the technical challenges involved in each of them. The solutions
to those challenges are described in the later parts of this book.
標(biāo)簽：
Communications
Wireless
Edition
2nd
上傳時(shí)間：
2020-06-01
上傳用戶：shancjb
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The use of optical free-space emissions to provide indoor wireless commu-
nications has been studied extensively since the pioneering work of Gfeller
and Bapst in 1979 [1]. These studies have been invariably interdisciplinary in-
volving such far flung areas such as optics design? indoor propagation studies?
electronics design? communications systems design among others. The focus
of this text is on the design of communications systems for indoor wireless
optical channels. Signalling techniques developed for wired fibre optic net-
Works are seldom efficient since they do not consider the bandwidth restricted
nature of the wireless optical channel.
標(biāo)簽：
Communication
Wireless
Optical
Systems
上傳時(shí)間：
2020-06-01
上傳用戶：shancjb
-
This book is the result of Works dedicated to specific applications of
metaheuristics in smart electrical grids. From electric transmission,
distribution netWorks to electric microgrids, the notion of intelligence refers
to the ability to propose acceptable solutions in an increasingly more
restrictive environment. Most often, it refers to decision-making assisting
tools designed to support all human action.
標(biāo)簽：
Metaheuristics
Intelligent
Electrical
NetWorks
for
上傳時(shí)間：
2020-06-07
上傳用戶：shancjb
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LIKE SO MANY OTHERS , THIS BOOK WAS WRITTEN BECAUSE WE COULDN ’ T FIND ONE LIKE IT . We
needed something to hand to all of those people who have come to us asking for “a good
book to read on RFID.” When we looked for candidates we found some great books, but
most were aimed at electrical engineers or top-level managers, with very little for those of
us who are in between. This book is for developers, system and software architects, and
project managers, as well as students and professionals in all of the industries impacted by
Radio Frequency Identification (RFID) who want to understand how this technology
Works. As the title suggests, this book is about RFID in general and not just the most
recent developments; however, because so much is going on in the area of RFID for the
supply chain and especially the Electronic Product Code (EPC), we have devoted consider-
able space to these topics. Regardless of the type of RFID work you may be doing, we
think you will find something useful here.
標(biāo)簽：
Essentials
RFID
上傳時(shí)間：
2020-06-08
上傳用戶：shancjb
-
The purpose of this book is to help anyone involved in small-scale geophys-
ical surveys. It is not a textbook in the traditional sense, in that it is designed
for use in the field and concerns itself with practical matters – with the-
ory taking second place. Where theory determines field practice, it is stated,
not developed or justified. For example, no attempt is made to explain why
four-electrode resistivity Works where two-electrode surveys do not.
標(biāo)簽：
Field_Geophysics
上傳時(shí)間：
2020-06-09
上傳用戶：shancjb
-
If one examines the current literature on GPS receiver design, most of it is quite a
bit above the level of the novice. It is taken for granted that the reader is already at a
fairly high level of understanding and proceeds from there. This text will be an
attempt to take the reader through the concepts and circuits needed to be able to
understand how a GPS receiver Works from the antenna to the solution of user
position.
標(biāo)簽：
Fundamentals_of_Global_Positionin
g_System
上傳時(shí)間：
2020-06-09
上傳用戶：shancjb
