中文说明：利用matlab针对图像进行马氏距离计算 ,pwm整流器的建模仿真，分数阶傅里叶变换计算方面,基于分段非线性权重值的Pso算法，旋转机械二维全息谱计算的实用例程，采用累计贡献率的方法。
English Description：
Using MATLAB Mahalanobis distance for image computing, modeling and simulation of PWM rectifier, fractional Fourier transform, Pso algorithm based on piecewise linear weights, calculation of two-dimensional holospectrum in rotating machinery and practical routines uses the cumulative contribution of the method.