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extern的用法，本文较详细的介绍了extern的用法及注意事项。(extern usage, this paper describes in detail the usage of extern and precautions.)

sift算法的基础论文，很经典，还有一篇sift的讲解，由于上传限制，如果有需要可以向本人索取(sift algorithm based on papers, very classic, there is a sift in the talks, the upload limit, and if necessary I can be obtained)

产品质量先期策划控制程序的相关文件，适用APQP流程的TS16949体系(Advanced Product Quality Planning control procedures of the relevant documents, for APQP process TS16949 system)

说明：  用matlab程序做的 车牌字符分割程序，能很好的解决智能交通中的车牌追中。(Matlab program to do with the license plate character segmentation process can be a good solution in the license plate smart catch in traffic.)

严格耦合波法分析光栅衍射的matlab源程序(the matlab code for rigorous coupling wave analysis of diffractiong grating! )

等间隔的OFDMA程序，里面有在多径信道下做的，对OFDMA的入门者有极大的帮助(interval of OFDMA procedures, which are in multi-path channel do, for the beginners OFDMA a great help)

33节点 潮流计算 希望对大家用 大家可以看看(very good)

已知一个LTI系统的差分方程为： y[n]-1.143*y[n-1]+0.4128*y[n-2]=0.0675*x[n]+0.1349*x[n-1]+0.0675*x[n-2] 初始条件y(-1)=1,y(-2)=2，输入x(n)=u(n)，计算系统的零输入响应 (known LTI system of a differential equation : y [n]-1.143* y [n-1] 0.4128* y [n-2] x = 0.0675* 0.1349 [n]* x [n-1] 0.0675* x [n-2] initial conditions y (1) = 1, y (2) = 2, input x (n) = u (n), we calculate the zero input response)

This file can help to find roots of polynomial equation in simple way using matlab

捷联惯性导航系统滤波程序，matlab源代码(Strapdown inertial navigation system, filtering procedures, Matlab source code)