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四节点杆单元集成，及力，应力，刚度矩阵，使用MATLAB编制，此为m文件(QuadraticBarElement assemble force,stiff,stress)

本程序可以实现二进制补码形式转换为原码形式(The program can complement binary form into the form of the original code)

QPSK 调制全称 Quadrature Phase Shift Keying，意为正交相移键控，是 一种数字调制方式。它的频带利用率高，且抗干扰性能强，已经成为现代通信 技术中一种十分重要的调制解调方(QPSK’s full name is Quadrature Phaseshift Keying which is a kind of digital modulation types. It has been widely used in wireless communications and has become very important in modern communication because of its high bandwidth efficiency and strong anti-interference performance)

仿真两个共振频率的冲击信号，观察其频谱分析(Impact signal simulation of two resonant frequencies observed spectral analysis)

自适应滤波器的LMS算法，并观察不同的步长因子对其性能的影响。(LMS adaptive filter algorithm, and observe the different step-size factor on their performance.)

对控制装置及仪表的控制系统进行仿真，并给出性能分析(Control devices and instrumentation control system simulation and performance analysis is given )

用MATLAB实现IIR滤波器的设计，希望能帮助一些学信号与系统的同学们。(IIR filters using MATLAB to achieve the design, hoping to learn signals and systems to help fellow students.)

matlab simulation of diredt rotor flux oriented vector control of induction motor mith matlab code mmmmmmmmmmmmmmmmmmmmm

说明：  海量数据导入与导出matlab的有效方法，在数学建模时处理大量数据非常有用(Mass data import and export matlab effective method, in the mathematical modeling is very useful to deal with large amounts of data)

This function used to calculate PCA of image.