计算器，计算（不含优先级）0.0

RTCM3.0差分数据格式解码，将二进制的原始数据进行解码、转换为十进制的数据(RTCM3.0 differential data decoder)

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osg地图，在vs2010和qt5上面搭建地图软件框架(Osg map, in the vs2010 and qt5 above the map software framework)

The chart routine vb calls vc dll()

历史上最强大的windows日志系统，性能是log4c的3倍 (History' s most powerful windows log system performance is log4c of 3 times)

说明：  Objective-C基础学习,适合初学者的一本基础书籍(Objective-C basic learned,it is very useful for begin learner.)

说明：  基于51单片机的超声波测距显示系统，利用超声波模块进行测距，通过数码管显示数值，代码简单，通俗易懂。(The ultrasonic ranging display system based on 51 single chip computer uses the ultrasonic module to measure the distance. The numerical value is displayed by the digital tube. The code is simple and easy to understand.)

由opencv2.3.1+vs2008编写的界面程序，可以通过界面对话框上的控制按钮来控制笔记本电脑上相机的开启与关闭。(Opencv2.3.1+vs2008 written by the interface program, you can control on your laptop on and off the camera via the control buttons on the dialog interface.)

检测NAT类型的客户端，程序中指定了服务器IP地址，用户可以自行修改(Detect NAT type of the client, the program specifies the server IP address, the user can modify)

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