主要是对SIM卡PPT的通信原理、通信安全的介绍，并通过实例编程传输详细对SIM卡的简单应用。并附有代码进行详解，对于这方面通信知识想了解的可以看看。
This paper mainly introduces the communication principle and security of the SIM card PPT, and transmits the simple application of the SIM card through the example programming. With detailed code, for this aspect of communication knowledge you want to know, you can see. (2018-11-21, ansys, 4196KB, 下载0次)
用于ansys输电线路仿真模型。本程序提供了详细的编程，直接复制到ansys里面就可以了。
Used for ansys transmission line simulation model.This program provides detailed programming, directly copy into ansys is ok. (2018-11-06, ansys, 1KB, 下载16次)
介绍了六节点三角形单元的基本原理，是使用matlab编程分析有限元问题的基础。
The basic principle of the six node triangular element is introduced. (2018-01-13, ansys, 371KB, 下载8次)