shock_filter

找函数的零点位置， 返回的是零点的index。 被找的函数须是连续函数 (Find zero points index of a continous function)

说明：  这是作者自己编写的基于matlab语言的程序设计。遗传算法的函数优化 应用。 (is prepared by the author himself on the Matlab programming language. Genetic Algorithms Optimization applications.)

由于实际信道中的多径和阴影效应，单个认知用户频谱感知的性能受到影响，因此需要靠不同用户间的协同频谱感知来对抗多径和阴影效应。本设计要求在文中采用一种协作机制，即两用户进行协作频谱感知，提高主用户的检测率，减少检测时间，并且得到捷变增益。要求给出仿真结果。(As the actual channel of the multi-path and shadow effect, a single user of spectrum sensing of cognitive performance are affected, it needs to depend on collaboration between different users of spectrum sensing to combat multipath and shadow effects. The design requirements in the text using a cooperation mechanism, namely, two user collaborative spectrum sensing, to improve the detection rate of the primary users, reducing detection time, and get agility gain. Required to give simulation results.)

主要实现并网过程中基于瞬时无功的谐波检测和无功补偿，能够很明显的看出补偿前后的电网电流波形对比图(Mainly realized in the process of harmonic detection based on instantaneous reactive power and reactive power compensation， can clearly see the grid before and after the compensation current waveform comparison chart)

小波去噪程序，调用matlab，db6基波，分解三次，用于声音处理，比一般滤波器要好用(Wavelet denoising procedure, call matlab, db6 fundamental decomposition three times, for sound processing, be easy to use than the average filter)

Those wishing to model a surface data in the form of z(x,y) scattered or semi-scattered data have had few options in matlab - mainly griddata.

说明：  三自由度汽车模型的Simulink模块。。。。。。。。。。。。。。。。。。(Simulink module of three-degree-of-freedom car model)

Implementing quadrature modulation and demodulation of analog signals in digital signal processing, using MATLAB

对圆周运动转换到极坐标系，进行卡尔曼滤波(Conversion of circular motion to the polar coordinate system, the Kalman filter)

The audio processing program is used for recognition of digital audio source by alogrithm of HMM.