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通过对hilbert变换的matlab实现，增加对hilbert变换的理解，(Matlab by hilbert transform implementation, to increase the understanding of hilbert transform,)

matlab的一些常用算法程序集，包括微分，插值等等，对初学者很实用(matlab assembly of some commonly used algorithms, including differential, interpolation, etc., very useful for beginners)

steganografy using Least significant bit

OFDM using uqiue word. Generation and MMSE decoding, Sphere decoding

shi te zheng pailei de daima

matlab光斑形成，代码和文章，仅供学习参考(matlab spot formation, code and articles)

在PID控制中，微分信号的引入可改善系统的动态特性，但也易引起高频干扰。在误差扰动突变时尤其显出微分项的不足。若在控制算法中加入低通滤波器，则可使系统性能得到改善。(In PID control, the introduction of differential signal can improve the dynamic characteristics of the system, but it can also cause high-frequency interference. When error perturbations change abrupt, the deficiency of differential terms especially shows. If the low-pass filter is added to the control algorithm, the performance of the system can be improved.)

matlab中的数值微分，有用中点公式，自适应法，理查森外推算法等方法求函数的导数，算法的程序实现在文件中都已经给出了。(in the numerical differentiation matlab, useful midpoint formula, adaptive method, Richardson extrapolation methods such as France seek the derivative of the function, the algorithm of the program implementation in the document have been given.)

matlab中矩阵的操作，一些简单的操作，记不住的时候，可以看看( matrix operations in matlab)

Recently, both to return to my old love for evolution and to broaden my research horizon, I have started working on models simulating the dynamics of evolutionary processes. It is becoming clearer and clearer in biology that to understand form,