handheld electronic devices play a key role in our everydaylives. Because dependability is paramount, handhelds arecarefully engineered with lightweight power sources forreliable use under normal conditions. But no amount ofcareful engineering can prevent the mistreatment theywill undergo at the hands of humans. For example, whathappens when a factory worker drops a bar code scanner,causing the battery to pop out? Such events areelectronically unpredictable, and important data storedin volatile memory would be lost without some form ofsafety net—namely a short-term power holdup systemthat stores suffi cient energy to supply standby power untilthe battery can be replaced or the data can be stored inpermanent memory.
介紹一種采用單片機技術和基站器件EM4095的手持式低頻RFID讀卡器方案。首先對整個系統框架進行說明，然后介紹主要功能模塊的設計，給出了各模塊的原理圖。重點描述了基站器件EM4095的性能參數和功能原理，最后描述了該系統的主程序流程圖。
Abstract:
In this paper,a handheld RFID reader based on MCU and EM4095 is introduced.At first，the configuration of this system is explained.Then the design of main modules and schematic documents are particularly presented.The parameters and principle of the chip EM4095 are introduced in detail. At last，the main software flow is given
We would like to welcome you as a user of the Allegro CX, a rugged, handheld fi eld PC for data collection. Developed with the input of data collection professionals worldwide, the Allegro CX is adaptable and versatile for use in a wide variety of data collection environments. The Allegro CX continues to utilize our ergonomic, lightweight design that is standard in our line of Allegro Field PCs. This design makes your Allegro easy to use for extended periods while moving to and from data collection sites in the fi eld.
WINDOWS CE 通信指南(附光盤)
本書配套光盤內容包括：本書的英文版電子書；SDK for Windows CE，handheld PC Professional Edition 3.0；范例源代碼；送“Internet互聯網即時通”多媒體學習軟件。
本書是Microsoft Windows CE開發人員指南系列叢書之一。Microsoft Windows CE是公司為系統資源有限的設備開發的一種小型操作系統。因為Windows CE具有模塊化的設計特征，所以能夠適用于多種設備，包括從手提PC（H/PC）到嵌入式系統。全書共分十章：Windows CE通信概述，串行通信，電話API，遠程訪問服務，Windows插口，Windows連網，Internet連接，安全支持提供者接口密碼技術和無線服務。
本書是為Windows CE開發人員編寫的，是Windows CE應用程序開發人員必備的手冊，同時也可作為廣大科技人員，大專院校相關專業師生自學的參考書。
本書配套光盤內容包括：本書的英文版電子書；SDK for Windows CE，handheld PC Professional Edition 3.0；范例源代碼；送“Internet互聯網即時通”多媒體學習軟件。
PIXIL is a small footprint operating environment, complete with
PDA PIM applications, a browser and multimedia applications
for small handheld and flat-panel based devices.
Most code samples included on this CD were developed with Microsoft Visual C++ version 5.0 and the Microsoft Windows CE Toolkit for Visual C++ version 5.0. The Sspi and Crypto samples were developed with Microsoft Visual C++ version 6.0 and the Microsoft Windows CE Toolkit for Visual C++ 6.0. The code in sample applications is ported for a handheld PC, but the programming concepts that are presented apply to all Windows CE-based platforms.
This book is an in-depth exploration into eVB s inherent features, and how to use them to solve likely mobile application programming tasks. After reading the book the reader will be able to write applications tackling a wide array of business problems for Windows CE-powered devices, both customized and for PocketPC and handheld PC products. This book will help ease the transition into the language, and provide a reference for even more experienced developers.
32feet.NET is a shared-source project to make personal area networking technologies such as Bluetooth, Infrared (IrDA) and more, easily accessible from .NET code. Supports desktop, mobile or embedded systems. 32feet.NET is free for commercial or non-commercial use. If you use the binaries you can just use the library as-is, if you make modifications to the source you need to include the 32feet.NET License.txt document and ensure the file headers are not modified/removed. The project currently consists of the following libraries:-
Bluetooth
IrDA
Object Exchange
Bluetooth support requires a device with either the Microsoft, Widcomm, BlueSoleil, or Stonestreet One Bluetopia Bluetooth stack. Requires .NET Compact Framework v3.5 or above and Windows CE.NET 4.2 or above, or .NET Framework v3.5 for desktop Windows XP, Vista, 7 and 8. A subset of functionality is available for Windows Phone 8 and Windows Embedded handheld 8 in the InTheHand.Phone.Bluetooth.dll library.
In recent years, cellular voice networks have transformed into powerful packet-switched
access networks for both voice communication and Internet access. Evolving Universal
Mobile Telecommunication System (UMTS) networks and first Long Term Evolution
(LTE) installations now deliver bandwidths of several megabits per second to individual
users, and mobile access to the Internet from handheld devices and notebooks is no
longer perceived as slower than a Digital Subscriber Line (DSL) or cable connection.
Bandwidth and capacity demands, however, keep rising because of the increasing number
of people using the networks and because of bandwidth-intensive applications such as
video streaming. Thus, network manufacturers and network operators need to find ways
to continuously increase the capacity and performance of their cellular networks while
reducing the cost.
