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对正选信号进行仿真，画频谱图，并分别在时域和频域对信号延迟。(Positive selection signal delay simulation)

向下延拓是不稳定算法，这个程序采用迭代法向下延拓，稳定性更好，自己编写的，供大家参考(Downward continuation algorithm is unstable, this program uses an iterative method for downward continuation, better stability, I have written for your reference)

说明：  MATLAB应用，做了一个图像特征提取程序，用来进行图像识别和区分(In matlab application, an image feature extraction program is made for image recognition and discrimination)

2003-2011年的全国大学生数学建模题目(2003-2011 subject of mathematical modeling)

用有限元方法解偏微分方程的算例。区域是[0,1]*[0,1]的正方形区域，区域剖分网格是标准正方形。区域剖分、节点计算、转化成代数方程求解，结果画图显示及txt结果输出，每一步都很详细。(Two-dimensional numerical example of using the finite element method for solving partial differential equations . Region is a [0,1]* [0,1] of the square region, a square region of a standard mesh grid. Regional split, node calculation, converted into algebraic equations, the results display and txt file result output, each step is very detailed.)

MIMO Systems for Rayleigh and Ricean Fading channels. Performance Analysis underdifferent channel conditions

基于matlab环境利用递归函数计算n的阶乘(use matlab to caculate N！)

The Z-source converter overcomes the conceptual and theoretical barriers and limitations of the traditional voltage-source converter (abbreviated as V-source converter) and current-source converter (abbreviated as I-source converter) and provides a novel power conversion concept. The Z-source concept can be applied to all dc-to-ac, ac-to-dc, ac-to-ac, and dc-to-dc power conversion.

vmd，MATLAB程序，针对EMD分解引起的模态混叠问题，能够得到较纯净的IMF分量(VMD, MATLAB program, for the modal aliasing problems caused by EMD decomposition, can get relatively pure IMF components)

***************CPM modulation***************** 关联长度为L=3 连续相位调制 by yyf 2010.11.12 ***************CPM modulation*****************( ***************CPM modulation***************** 关联长度为L=3 连续相位调制 by yyf 2010.11.12 ***************CPM modulation*****************)