huffmancode

滑膜变结构控制方法的应用例程，争对几个典型系统提供滑膜控制MATLAB程序范例(Variable structure control synovial application routines, for several typical control system synovial sample MATLAB program)

说明：  实现了snake without edge 这篇文献的算法。可以运行，而且结果良好。(snake 0r active contour model.)

说明：  古典密码 一共4种古典密码的matlab实现，算是一个很实用的加密基础训练(A total of four kinds of classical classical password password matlab implementation, be a very useful basis for training of encryption)

Reliable authorization and authentication are becoming necessary for many everyday applications such as boarding an aircraft, performing financial transaction, logging to a secure system etc. Identity verification becomes a challenging task when it has to be automated with high accuracy and with low probability of break-ins and low rates of false match. Moreover, person verification is not a new problem and society had created three traditional modes of designation: 1. Possessions: Physical possessions such as keys, passports and smart cards. 2. Knowledge: Pieces of information those are secret and known only to the right person such as PIN, passwords, user names etc. 3. Biometrics: Physiological and behavioral characteristics of individuals that distinguish one person from the others. These characteristics are different in each person.

说明：  信号产生的matlab仿真，包括单位冲激，单位阶跃，符号和抽样信号，内容丰富，适合信号分析同学使用(signal by matlab)

小波模极大值边缘检测+膨胀+闭操作+边缘跟踪 得到清晰边缘(The modulus maxima of wavelet transform edge detection+ expansion+ close operation+ edge tracking Get the clear edge)

搭建SISO收发系统，BPSK调制与解调，在白高斯信道下仿真系统BER性能。(Build SISO transceiver system, BPSK modulation and demodulation, the white Gaussian channel simulation system BER performance.)

比较了基于SE，SR，SS的符号模式CMA算法，仿真表明，SS收敛速度快，但稳态误差大，SR的综合效果最好。(Comparison based on the SE, SR, SS symbolic mode CMA algorithm, simulation results show that SS convergence speed is fast, but steady-state error, the combined effect of SR.)

是希尔伯特黄变换的matlab程序，很有用，尤其对于初学者，有问题可以和我联系，呵呵(it is for easy for the beginner)

双向渐进结构拓扑优化原始代码，采用软杀伤法的BESO( the source code of Bidirectional evolutionary structural topology optimization with the soft kill law BESO)