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说明：  使用matlab编写的PN序列函数，用来生成PN序列，里面有大量说明(use Matlab prepared by the PN sequence function, used to generate PN sequence, there are extensive notes)

为研究局部阴影效应对光伏发电系统的影响，首先建立了光伏阵列工程数学模型，分析局部阴影条件下光伏阵列的输出特性。为了便于工程分析，该文利用PVSYST软件分析比较单晶硅、多晶硅和薄膜电池等3种不同材料光伏电池在局部阴影条件卜的输出功率，为工程应用提供了良好的指导作用。最后提出了几种提高光伏阵列抗局部阴影能力的措施厂 (To investigate the effect of local shading effects on photovoltaic systems, photovoltaic array project was first established mathematical model to analyze the output characteristics under conditions of partial shading of the PV array. In order to facilitate engineering analysis, this paper use PVSYST software analysis and comparison monocrystalline, polycrystalline and thin film batteries, photovoltaic cells of three different materials in partial shade conditions Bu output power for engineering applications provide a good guide. Finally, several photovoltaic arrays to improve the ability to measure resistance to partial shade plant)

这是国外做得一个课题，后面附有源代码，matlab的代码(This is done abroad, a task attached to the source code, matlab code)

the generalized program to have knowledge about the billing system.

This UMAT program is a very good material for beginners in learning how to form Jacobin Matrix, how to update stress, etc.

飞机姿态角控制时，基于四元数和欧拉角的位置坐标转换关系，欧拉角控制法同四元数控制方法间的相互转换。(When the aircraft attitude angle control, based on the quaternion and Euler angle of the coordinates of the conversion relationship between the Euler angle control method and quaternion control method conversion between.)

matlb编写的IIR滤波器程序，按照给定指标采用模拟低通滤波器（巴特沃思低通或者切比雪夫低通）去逼近理想模拟低通滤波器 ，然后通过双线性变换法对模拟滤波器进行数字化，得到数字滤波器 。(IIR filter matlb prepared by the procedure, according to set targets and analog low-pass filter (Butterworth low-pass or low-pass Chebyshev) approximation to the ideal analog low-pass filter, and then through the bilinear transformation method for analog filtering device to digitize, the digital filter.)

Jafarkhani differential STBC matlab procedure, at different signal to noise ratio, the system compares the SER and BER. The use of 2-fat one admission, Rayleigh fading channel

全极化SAR分类算法的实现代码，plot_H_alpha(Full polarimetric SAR classification algorithm implementation code, plot_H_alpha)

遗传算法matlab程序，对初学者很有帮助，框架较好。(The genetic algorithm matlab program, useful for beginners, good framework.)