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离散傅里叶变换，加窗fft解决谐波信号中的频谱泄露和栅栏效应(Discrete Fourier transform, windowed fft solve harmonic signal leakage and fence effect of spectrum)

入侵检测算法，计算机常用的工具，聚类分析(Intrusion detection algorithm, commonly used computer tools, cluster analysis)

MATLAB est un interpréteur: les instructions sont interprétées et exécutées ligne par ligne. MATLAB fonctionne dans plusieurs environnements tels que X-Windows, Windows, Macintosh

1,某厂向用户提供发动机，合同规定，第一、二、三季度末分别交货40台、60台、80台．每季度的生产费用为 f=ax+bx^2（元），其中x是该季生产的台数．若交货后有剩余，可用于下季度交货，但需支付存储费，每台每季度c元．已知工厂每季度最大生产能力为100台，第一季度开始时无存货，设a=50、b=0.2、c=4，问工厂应如何安排生产计划，才能既满足合同又使总费用最低． 2,函数的输入为A,B两个矩阵，实现如下功能：从A矩阵中找出与B完全相同的子矩阵，并将该子矩阵左上角的位置保存到2*n的向量index中，最后函数返回A中所有与B完全相同的子矩阵的左上角坐标。(1, a factory to provide users with the engine, the provisions of the contract, first, second and third quarter, respectively Delivery 40 units, 60 units, 80 units. The production cost of each quarter the f = ax+bx ^ 2 ($), where x is the number of Taiwan-quarter production. If after delivery, the surplus can be used for delivery next quarter, but to pay the storage fees, each quarterly c. Factory known each quarter of the maximum production capacity of 100 units of stock in the first quarter, setting a = 50, b = 0.2, c = 4, asked how the factory should arrange production plan, in order to both meet the contract and the lowest total cost of . 2, the function' s input is the two matrices A, B, to achieve the following functions: to identify from the matrix A and B are identical sub-matrix, and a position in the upper-left corner of the sub-matrix is ​ ​ saved to the vector index of 2* n, The last function returns the coordinates of the upper left corner of the sub-matrices A)

说明：  SOM算法,matlab程序,是经典的教科书的例子程序(SOM algorithm, Matlab procedures, are classic textbook example of procedures)

gauss消去法及其应用: 参考北大版数值线性代数(Gaussian Elimination method and application reference <Numerical linear algebra> published by peking university )

the file is for light

使用matlab中的GUI设计的译码器，配有适当的注释，适合初学者。(The GUI design using matlab decoder, with appropriate comments, suitable for beginners.)

可靠度的快速算法 强度分布 指数分布 应力分布 正态分布(Reliability of the fast algorithm exponential intensity distribution normal stress distribution)

实现了PCM编码->基带码型转换（NRZ to HDB3）->QPSK调制->高斯信道->QPSK解调->基带码型反转换（HDB3 to NRZ）->PCM解码。同时给出了误码率曲线。(Achieve a PCM coding-> Baseband code converter (NRZ to HDB3)-> QPSK Modulation-> Gaussian channel-> QPSK demodulator-> anti-baseband conversion pattern (HDB3 to NRZ)-> PCM decoding. Also shows the BER curves.)