ch8example1prog1

矩形域上的二阶椭圆差分格式，适合偏微分方程的学习，是有限差分格式(this is the equetion about the partial differetial equotion)

技术说明文档：基于分形理论的电树枝物理现象的计算机仿真研究(Technical Document: Electrical treeing simulation based on fractal theory)

主层次分析的过程及matlab的实现，有四个文件也就是四个函数(The main analytic hierarchy process and the realization of matlab four is four functions)

本文在介绍MIMO无线通信系统模型的基础上，通过对比分析几种常用空时编码方法，选定空时分组码对信号进行编码并建立瑞利衰落信道模型，通过对两发一收及两发两收系统的仿真，研究接收天线数对系统接收信号可靠性的影响。之后进一步扩展到不同发射矩阵条件下研究多发一收系统的频谱利用率及误符号率，分析不同天线数目，不同发射矩阵条件下空时正交分组码检测算法的性能。(This paper introduced the MIMO wireless communication system model, through the comparative analysis of several commonly used method of space-time coding, grouping code for the selected space-time signal is encoded and establish Rayleigh fading channel model, through two rounds one and two rounds of closing Simulation of two closed systems, research receiving antennas to receive signals affect the reliability of the system. After further extended to study the conditions under different emission matrix of multiple spectral efficiency and symbol error rate of a closed system, analyze the different number of antennas, the performance under different emission matrix orthogonal space-time block codes condition detection algorithm.)

说明：  计算数独的好方法，能够快速解决问题，使用方便(Good way to calculate the number of independent, able to quickly solve the problem, easy to use)

QPSK波形及其经过带宽为4hz的带通滤波器(QPSK waveform and its after 4HZ bandwidth of the bandpass filter)

MATLAB_SIMULINK通信系统建模与仿真分析(MATLAB_SIMULINK communications system modeling and simulation analysis)

matlab工具箱，可以实现很多功能。解决许多问题！(The matlab toolbox, can realize many functions. Solve many problems!)

利用MATLAB爬虫示例，自动下载GPM-IMERG-FINAL数据(Automatically download GPM-IMERG-FINAL data using MATLAB crawler example)

用于脑部分割的一个简单的MATLAB程序(For brain segmentation with a simple MATLAB program)