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09年大学生数学建模比赛D组题，该作品获得专科组国家二等奖(2009 Mathematical Modeling Group D title game, the work received the second prize specialist group of countries)

Long-Term Evolution: Simplify the Migration to 4G Networks

利用MATLAB来实现离散傅里叶变换和离散傅里叶逆变换，N为离散傅里叶变换长度，形式为xk=IDFT（xn，N）(To achieve the discrete Fu Liye transform and discrete Fu Liye transform by using MATLAB, N as the discrete Fu Liye transform length, form xk=IDFT (xn, N))

说明：  该程序是在matlab中利用窗函数法设计滤波器的示例(The program is using the window function matlab filter design example)

MATLAB的统计学功能，适用于计量经济学、统计学等学科。(MATLAB for statistics)

《精通Matlab图像处理》一书的例程，入门必备。共17个文件夹，让你从入门到精通！！(Matlab Study_《Proficient in MATLAB image processing》)

matlab 6.0 ,word格式，适用广大群众学习matlab.(matlab 6.0)

This paper review the effectiveness of the parity space approach to identify faults or disturbance in a system. The most commonly used is the observer based procedures, and redundancy relationship method. This involves analytical mathematical analysis of geometry and bilinear algebra. Then, technological advances which require complex computation such as artificial intelligence and genetic algorithm had made tremendous improvement to fault Detection and Isolation (FDI) analysis. Dynamic Parity Space Approach was studied for a discrete state-space model. Important data will be extracted using this approach especially for residual generation which is the backbones of FDI analysis. Subsequently, at each time instant k, the generated residuals will form a matrix that will define the fault signature. It is remarkable that this approach is proven in this study to be effective in diagnosis and faults isolation.

说明：  用matlab实现巴特沃斯高通和低通滤波滤波，对图像进行相应的处理(Using matlab to achieve Butterworth high-pass and low-pass filtering filtering, the image corresponding treatment)

在现代测试技术中，考虑到传感器特性，针对传感器特性曲线非线性问题的补偿(In modern testing technology, taking into account characteristics of the sensor, the sensor characteristic curve for the compensation of nonlinear problems)