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Particle swarm optimization has been used to solve many optimization problems since it was proposed by Kennedy and Eberhart in 1995 [4]. After that, they published one book [9] and several papers on this topic [5][7][13][15], one of which did a study on its performance using four nonlinear functions adopted as a benchmark by many researchers in this area [14]. In PSO, each particle moves in the search space with a velocity according to its own previous best solution and its group’s previous best solution. The dimension of the search space can be any positive integer.

MSK和GMSK数字调制方式的比较，主要利用simulink模块来实现仿真。(Comparison between GMSK-Modulation (GSM standard), MSK Type A-Modulation and MSK Type B-Modulation)

MATLAB程序，用以实现2FSK数字信号的产生(MATLAB program to achieve generation of 2FSK digital signal)

Word recognition matlab

对于一幅输入图像，将产生一幅输出图像，输出图像的每个像素点的灰度值由输入像素点决定，将感兴趣特征的对比度扩展使之占据可显示灰度级的更大部分。使一输入图像转换为在每一灰度级上都有相同的像素点数，均衡化会减少灰度级数。大多数自然图像由于其灰度值分布集中在较窄的范围之内，引起图像细节不够清楚。采用直方图修正后可使图像的灰度间距拉大或使灰度均匀分布，从而增大了反差，使图像细节清楚，达到增强的目的。(For an input image, will produce an output image, the output image gray value of each pixel from the input pixel decided to expand interest in the contrast of features to make it account for more gray levels can be displayed most. Make an input image is converted to grayscale in each pixel have the same points, equalization will reduce the gray series. Most natural images because of their gray value distribution concentrated in a narrow range, causing the image detail is not clear enough. Make the image histogram revised by the gray space widening or so gray uniform distribution, thereby increasing the contrast between the image details clear objective to achieve enhanced.)

莫比乌斯函数的Matlab源代码，可绘制响应图形(Mö bius function of Matlab source code, graphics can be drawn to respond to)

rectifier model in hvdc converter circuit

DVB-T，DTMB简化的信道仿真程序。设置了三种保护间隔：循环前缀、零添加、伪随机添加。用于研究不同保护间隔下的SNR特性，附带一个不同保护间隔下的频谱显示，可看出三种保护间隔对OFDM频谱陡峭程度的影响。(DVB-T，DTMB channel simulation and spectrum display.)

数字信号分析，用matlab你建立一个具有界面的频谱分析仪(make a FFT spectrum analyzer using the GUI of matlab and tells some basic knowledge of the spectrum analyze of a signal.)

相控阵波束形成代码，具有详细注释，适合初学者使用！(Phased array beamforming code with detailed comments, suitable for beginners to use!)