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产生陀螺和加速度计的数据，以便在组合导航或者纯惯性导航中进行仿真(A gyroscope and accelerometer data, so the combination of navigation or pure inertial navigation simulation)

GPS单点定位程序，卡尔曼滤波解算，matlab实现(GPS Single Point Positioning Program, Kalman Filter Solution and Matlab Implementation)

tftp server源代码，比较简单的例子。-tftp server source code, a relatively simple example.

Source code for flicker free drawing.

谷歌测试框架源码，非常有学习意义，可以直接在自己的工程中使用。(Google testing framework source code, very meaning of learning, you can use directly in their own projects.)

简要介绍了跨平台的开源场景图形API,本书专为准备开始学习OSG，并使用OSG 进行程序开发的开发者所编写。 本书所涉及的工具可能包括特定行业的应用软件，本书同时还提供有关虚拟现实 和仿真方面的介绍，这也正是OSG 的强大之处所在。(A Quick Introduction to the Cross-Platform Open Source Scene Graph API.This book is designed for ready to start learning OSG, and program development using OSG written by developers. Tools involved in the book may include industry-specific software applications, this book also provides information about virtual reality And presentation aspects of simulation, which is where the power of the OSG.)

组合数学，又称为离散数学，但有时人们也把组合数学和图论加在一起算成是离散数学。组合数学是计算机出现以后迅速发展起来的一门数学分支。计算机科学就是算法的科学，而计算机所处理的对象是离散的数据，所以离散对象的处理就成了计算机科学的核心，而研究离散对象的科学恰恰就是组合数学。组合数学的发展改变了传统数学中分析和代数占统治地位的局面(Combinatorial mathematics, also known as discrete math, but sometimes people put combinatorial mathematics and graph theory together are counted as discrete mathematics. Combinatorial mathematics are beyond the rapid development of computers with a branch of mathematics. Computer Science is the scientific method, and computer objects are handled by discrete data, so deal with discrete objects has become the core of computer science, and the study of discrete objects is precisely the combination of science and math. The development of combinatorial mathematics has changed the traditional analysis of math and algebra dominant situation)

Client程序同样分别创建一个TCP socket 和一个UDP socket，首先client使用TCP socket连接TCP Server。 连接成功后显示提示信息； 然后client端向TCP Server发送“GET UDP PORT”字符串，Server收到后向client回送自己的UDP Server 端口号（即Client端仅知道TCP Server的端口号而不知道UDP Server的端口号）； client在收到UDP Server的端口号后, 为用户显示3个选项： 1．“Get current time（TCP）”服务器时间 2．“Echo Mode（UDP）”回显6 3．“Exit the program”. -Client program also creates a TCP socket, respectively, and a UDP socket, the first client to use TCP socket connection TCP Server. After a successful connection displays a prompt message and then client-side to the TCP Server sends " GET UDP PORT" string, Server receipt back to the client to send their UDP Server port number (ie, Client-side only to know the TCP Server" s UDP port number do not know Server" s port number) client received UDP Server port number, in order to the user three options: 1. " Get current time (TCP)" server time 2. " Echo Mode (UDP)" echo 63. " Exit the program" .

说明：   字符串数组中的某个字符进行替换 统计每个数字出现的个数(A string array of characters in the replacement of Statistics figures for each number of)

产生16QAM基带信号，成型滤波通过AWG信道，接收端得到误码率和星座图。(The 16QAM baseband signal is generated, the shaping filtering is passed through the AWG channel, and the receiving end obtains the BER and constellation diagram.)