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该代码为PCA主成分分析，可用于特征选择，选取贡献最大的前三个主成分(The code for the PCA principal component analysis, can be used for feature selection, select the largest contribution to the first three principal components)

海洋各个参数的计算程序，包括密度，前密度，距离等各要素，适用于海洋学。(It s suit for Oceanography)

figure plot sample in matlab

融合程序,matlab的源代码。内含两个程序。(Fusion program, Matlab source code. Contains two procedures.)

we present an improved fuzzy C-means (FCM) algorithm for image segmentation by introducing a tradeoff weighted fuzzy factor and a kernel metric. The tradeoff weighted fuzzy factor depends on the space distance of all neighboring pixels and their gray-level difference simultaneously. By using this factor, the new algorithm can accurately estimate the damping extent of neighboring pixels. In order to further enhance its robustness to noise and outliers, we introduce a kernel distance measure to its objective function. The new algorithm adaptively determines the kernel parameter by using a fast bandwidth selection rule based on the distance variance of all data points in the collection. Furthermore, the tradeoff weighted fuzzy factor and the kernel distance measure are both parameter free. Experimental results on synthetic and real images show that the new algorithm is effective and efficient, and is relatively independent of this type of noise.

pso优化lssm的matlab程序，用于文件文本等的分类或者研究工作(Pso- LSSM matlab used in file, such as classification or research work)

针对带有时变时滞和时滞非线性耦合系统的,时滞范围相关混沌同步方法(delay-range-dependent chaos synchronization appproach under varying tiime-lags and delays nonlinear coupling)

2PSK调制器的设计,在通信原理教学中应用MATLAB语言，可借助MATLAB方便的绘图性，把信号的频谱用MATLAB图形,很好地展现给学生，这样学生可以通过形象的图形来掌握抽象的理论，从而更好地理解原理．(2PSK modulator design, principles of teaching in the communications applications MATLAB language, can take advantage of MATLAB graphics and convenient, the spectrum signal using MATLAB graphics, a good show to the students so that students can grasp the image of the graphics to the theory of abstract to better understand the principle.)

说明：  对语音信号进行处理，做fft，语谱图，短时fft，并进行对比(The speech signal processing, do fft, spectrogram, short fft, and compare)

以化学中反映扩散问题的Brusselator模型为例，采用MATLAB对大型Stiff问题进行仿真求解。(Reflected in the chemical diffusion problems Brusselator model as an example, using MATLAB simulation of large Stiff problem solving.)