envelope

说明：  特征值的提取方式 有需要的可以下载试试 还不错(for the value )

图像插值放大，最近邻，双线性，双三次matlab实现(The image interpolation enlarge nearest neighbor, bilinear, bicubic matlab achieve)

The plane stress analysis refers to the problems where the thickness of the structure is very small compared to other dimensions of the structure in the XY plane. The plane stress problem is a 2D problem. The stresses in the z direction are considered to be negligible,
 
0, the stress-strain compliance relationship for an isotropic material becomes,

1-D信号压缩传感的实现(正交匹配追踪法Orthogonal Matching Pursuit)简化版 (1-D Signal Recovery From Random Measurements)

making admitance matrix in matlab soft

求解偏微分方程，使用LF格式求解程序，具体方程见程序(Solution of partial differential equations, using the LF format solver)

本程序实现了基于相关矩阵法的LTE及4G中MIMO多径信道的仿真，最终获得了MIMO信道的传播矩阵。（第一步，选择应用场景（确定信道参数和天线配置参数）；第二步，计算相关矩阵，并做Cholesky分解；第三步,利用Jakes模型产生多普勒随机变量；第四步,形成TDL；第五步，根据前四步准备，最终得到MIMO多径信道的信道传输矩阵）(This procedure achieved based on the correlation matrix method and 4 g LTE MIMO in multipath channel simulation, finally obtained the spread of the MIMO channel matrix.)

说明：  等参元计算应力应变问题的有限元程序,matlab编写。(finite element program for plane stress problems)

Turbo码和LDPC码在深空通信中应用的及其发展(The Development of Turbo and LDPC Codes for Deep-Space Applications)

用QPSK信号实现beamforming操作并画出阵列响应图(Using QPSK signal to fulfil beamforming in array signal processing)