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The dynamics of orbit uncertainty in an unstable orbital environment are discussed with specific application to the orbit determination of a halo orbit about the Earth{Sun L1 point. This article documents a simplified orbit determination covariance program developed under Telecommunications and Mission Operations Division Technology support. The program is ideally suited to investigate spacecraft trajectory navigation in challenging environments, where the basic dynamics of the trajectory can no longer be modeled using near-Keplerian motion.

fifty years of coding theory，一篇经典的讲述纠错编码的IEEE文档，适合纠错编码读者阅读。里面详细讲述的纠错编码的发展史，包括BCH、RS、卷积码、Turbo码等编码-fifty years of coding theory, a classical error-correcting code on the IEEE document, suitable for error-correcting code readers. Which describe in detail the history of the development of error correction coding, including BCH, RS, convolutional codes, Turbo codes encoding

它能够把MATLAB的应用程序直接转变成Windows COM组件。MATLAB COM BUILDER给用户提供了另外一种代码重用以及程序发布的方式，它使得MATLAB应用程序更加容易发布和配置。-It is able to MATLAB application directly into a Windows COM components. MATLAB COM BUILDER provides the user with another code reuse, and procedures issued by way, it makes it easier to publish MATLAB applications and configuration.

TCP/IP（传输控制协议/Internet协议）：它是许多网络用于通信的通信协议。

The following is a WinZipped Visual C++ 5.0 project that implements a windows-based communication interface for the Nomad Scout robot. This is a windows interface-- there is no main(), but the part you need to look at is called RobotMain() and is located in robot.c. Simply unzip this code on your Windows 95 or Windows NT machine, connect up your Nomad Scout to serial port 1, and run the code. Examples meant for pattern matching are provided in robot.c

ITU SS7 AIF message format and codes part 5

可视电话的信令流程分析，主要是基站和终端之间的交互-video telephony signaling processes, mainly between the base station and terminal interactive

IPX通讯控件，由Winsock封装而成，附源代码-IPX communications control, derived from Winsock Packaging, with source code

delphi入门基本程序,包括OPC的通用协议,在这个基础上进行各个厂家的设备的数据采集-basic entry procedures, including the OPC common agreement on the basis for all manufacturers of the equipment data acquisition

环境监测无线传感器网络节点的设计 针对环境监测的要求,开发了一种兼容型的无线传感器网络节点系统。该系统以MSP430FG4618为核心,采用 CC2420 214G射频芯片,软件上移植了德州仪器( TI) ZigBee协议栈,并在应用层开发了通信程序。该系统可以组建成稳定的网状网络,功耗低,数据传输稳定.-Environmental monitoring wireless sensor network node designed for environmental monitoring requirements, to develop a compatible system for wireless sensor network node. The system MSP430FG4618 as the core, using radio frequency chip CC2420 214G, software transplanted Texas Instruments (TI) ZigBee protocol stack, and the application layer has developed a communication program. The system can be formed into a stable mesh networking, low power consumption, data transmission and stability.