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说明：  这是基本的模拟退火算法，里面还附有一个常用的测试函数。(This is the basic simulated annealing algorithm, which is also accompanied by a commonly used test functions.)

信号分析与识别仿真，采用GUI界面，包括数字和模拟信号的调制、解调及分析，可估计信号的频率、带宽等参数(Signal analysis and recognition simulation, USES the GUI interface, including digital and analog signal modulation and demodulation and analysis, can be estimated parameters such as frequency, bandwidth of the signal)

Matlab image encryption

采用距离环法对地杂波进行建模并仿真其功率谱(model ground clutter by ranging ring and simulate its power spectrum)

this code solve 8queens with genetic algorithm by matlab.

在信号处理中，信号发射时，信号通过载波，调制，以电磁波的形式发射出来 在接收端，射频信号通过天线接收，超外差式等方式进行处理，变频到中频 然后通过数字技术对中频信号进行处理，此时的中频信号采样率很高，多达几十兆赫 而要解调出来的信号很小，此时就要经过滤波来得到我们需要的信号 如果直接设计滤波器，阶数会非常庞大，软件，硬件设备都承受不了 因此，一般常用的技术是进行下变频处理，其主要技术就是通过抽取滤波进行下变频 常用的滤波器就是CIC抽取, 希望可以帮助一些坛友解决基本的问题。 (In signal processing, signal emission, signal through the carrier, in the form of electromagnetic wave modulation, launched In the receiver, rf signals through the antenna, specialized superheterodyne type means such as processing, the frequency conversion to intermediate frequency Then through digital technology of intermediate frequency signal processing, at this time of intermediate frequency signal sampling rate is very high, as many as several decades MHZ But the signal demodulation out is very small, at this time would be passing filter to get what we need signal If design directly filter, order number be colossal, software, hardware equipment all suffer Therefore, the technology is usually used for down-transducer processing, its main technical is by extracting filtering down-transducer Commonly used filter is CIC extraction, the hope can help some friends solve basic problems of the altar.)

Analyze performance of 2D FDFD algorithm for large systems.

Backpropagation, an abbreviation for backward propagation of errors , is a common method of training artificial neural networks used in conjunction with an optimization method such as gradient descent. The method calculates the gradient of a loss function with respects to all the weights in the network.

draws lines when two or more points are selected on the image

该文件中包含HHT（希尔伯特黄变换）的三种MATLAB程序，可以直接使用，非常方便，效果也不错。并附有相关网站。(The file contains the HHT (Hilbert-Huang Transform) of the three MATLAB program that can be used directly, very convenient with good results. Together with related sites.)