fenji_bijiao

This source code shows in a simple way how we can conver a time domain signal to frequency domain signal by fast fourier transform.

stuff for the serial modem on ELSA cards

调用函数来计算正，逆哈尔1-D DWT的主程序(Main program for calling functions to compute forward and inverse Haar 1-D DWT)

利用MATLAB自带的优化工具箱求解,包括数据信息(Built using MATLAB toolbox for solving optimization)

Buck double loop control

地震子波的提取，直接关系到地震资料分辨率，提取子波的方法很多，本程序采用了基于复赛谱的子波提取(Seismic wavelet extraction, directly related to the resolution of seismic data, wavelet extraction are many ways, this program uses spectrum based on wavelet extraction semi-finals)

knn-K近邻法实现两分类的函数代码，输入为两类的样本特征，和待测试的样本向量，输出为分类结果。(knn-K nearest neighbor method to achieve the two categories of function code, enter the characteristics of two types of samples, and samples to be tested vector, the output for the classification.)

matlab从入门到精通清晰版 周建兴版本的(Zhou Jianxing version of the clear version matlab from entry to the master)

该程序实现的锁相环，运行环境为matlab，二阶的环路滤波器(The program realization of phase-locked loop, operating environment for matlab, the second-order loop filter)

电动执行机构是连接控制器与执行器(阀门)的部件，从控制出来的是离散信号，经零阶保持器后成为一个方波 信号，值都是阶跃跳动，而阀门的实际工作是有一定的行程时间的，即实际上阀门是不可能实现阶跃跳动的，故此需要一个电动执行器，将控制器的阶跃信号变为连续变化信号，假定阀门的行程时间与阀门开度变化成正比。(Electric Actuator is connected controller and actuator (valve) parts, from the control out of the discrete signal by zero-order cage became a square wave signal, values are step-beating, but the actual work of the valve there is a certain amount of travel time, that is, in fact the valve can not be achieved step beat, and therefore need an electric actuator, the controller of the step change in the signal into a continuous signal, assuming that the valve and the valve travel time changes in direct proportion to the door opening.)