FFT_Analysis

在进行层次分析时，用于计算一致性矩阵，检验一致性。(In the level of analysis, used to calculate the consistency matrix, the consistency test.)

最优化算法之一，拟牛顿法，亦称BFGS法，用于求解极值问题，具有二次收敛性(One of the most optimization algorithms, quasi-Newton method, also known as BFGS method for solving extremum problems, with quadratic convergence)

matlab file pml photonoc crystal

计算图像中的欧拉数，经典代码，采用matlab实现，可以熟悉欧拉数的求法，及相关MATLAB函数的用法，带图片可测试。(calculated image of Euler number, classic code using Matlab realized, could familiar with the Euler number for the law, MATLAB functions and related usage, with pictures can be tested.)

说明：  时频分析（GUI），非常适合观察研究非平稳信号的时频特性(Time-Frequency Analysis)

duffing 混沌系统仿真，做控制的经常使用这个对象来验证控制性能。(duffing chaotic system simulink)

介绍了各种PID算法，以及对各种PID算法进行了matlab编程仿真(Describes the various PID algorithm, as well as a variety of PID algorithm matlab simulation program)

置换熵，一种度量信号混乱程度的非线性指标，permutation entropy(Permutation entropy, a nonlinear signal indicators measure of disorder, permutation entropy)

Matlab Code for Time delay Beamformer

多边形网格相交区域搜索,MATLAB源程序，含有若干示例(Polygon mesh intersection area search, MATLAB source, contains a number of examples)