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说明：  二阶锁相环simulink仿真，可以看一看(Second-order PLL Simulink simulation, you can see)

模拟涡旋光束传输过程,simulate vortex beam propagation

一些你不懂得的元器件英文名称这里都可以找到，(Some of the components you do not know the name in English can be found here,)

说明：  主要目的是从心电信号中提取R波，matlab编写(Extraction of R wave)

快速傅里叶变换滤波器的matlab程序算法设计及使用(It is a FFT-Filter designed by MATLAB code.Design and Application of Matlab Algorithm for Fast Fourier Transform Filter)

说明：  计算非连通多边形的面积和面积，输出其面积和形心坐标(Calculating the area and centroid of unconnected polygon)

寻库小车程发动机h桥测试灯循迹等，图和源程序可供大家参考学习，不错的资料，难得的-Carsearchdatabaseprocedures

基于逆波兰法的计算器程序，该计算器支持小数输入和正负数输入，支持四则运算以及指数运算，也支持括号的使用。(Reverse Polish law based calculator program, the calculator supports input and negative decimal number input, support four operations and index calculation, and also supports the use of parentheses.)

建筑工程类的一些规范，欢迎下载，或许有用-some kind of construction norms, welcome to download, perhaps useful

设计了IIR低通滤波器，需要的可以参考一下子的-Designed IIR low-pass filter at once need to refer to the