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有一学生成绩管理数据库如下表，要求建立一SAS数据集score，并输出显示 创建一个新的数据集class，新增平均成绩aver变量和等级考评grade变量，grade的值是根据aver值的大小给出A、B、C、D四个等级，并显示新数据集class(A student achievement management database as the table, called for the establishment of a SAS data set score, and output display create a new data set class, add an average score aver evaluation variables and grade level variables, grade values are based on the size of a aver value the A, B, C, D four grades, and displays the new data set of class)

modal synthesis method for the 1D wave equation fixed boundary conditions

一本关于合成孔径雷达的好书经典之作 基本包括了合成孔径雷达的(A synthetic aperture radar on the classic books basic includes synthetic aperture radar)

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to find decimation in signal processing

说明：  多目标优化，非遗传算法，matlab编程(Multi objective optimization)

HHT变换，用于实现希尔伯特黄变换，源代码附上(Hilbert transform)

In this document has been introduced how to solve different partial differential equations in Matlab programming language.Everbody can solve Heat Conduction Equation, Helmholtz Equation, Laplace Equation and Wave Equation for different initial and boundary conditions. This document is elemantary of to understand how to solve partial differential equations with the aid of a porgramming language.

The generalized total variation denoising algorithm which can be widely used for optimization or signal processing

基于LMS算法的自适应滤波收敛性的Matlab仿真(LMS adaptive filtering algorithm based on the convergence of the Matlab simulation)