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this a 3d fdtd code using matlab and it can be used as a reference for other structures. Dear sir, i need the VIP access please let me have it.

采用了精确一维搜索法进行目标函数求极值，其中使用了黄金分割法，最速下降法和拟牛顿法。(Using the exact one-dimensional search method to the objective function extremum, which uses the golden section method, steepest descent and quasi-Newton method.)

用于计算地震作用下单自由度结构的响应和响应谱(Used to calculate the response and response spectrum of a single degree of freedom structure under earthquake action)

smoothing images processing

copula时间序列模型在金融领域的应用(copula time series model applied in the financial sector)

this file plot fft . in this file two sine wave are plotted then by fft algorithm we plot fft

西工大研一惯性测量实验的粗对准程序以及图示，参考《捷联惯导算法与组合导航原理讲义》(Coarse alignment procedure and graphics for the INS experiment of Xigong University of Technology, refer to the Lecture on Strapdown Inertial Navigation Algorithms and Integrated Navigation Principles.)

BLAST detection algorithm

一个有关图像分割算法的Matlab源程序 (Image segmentation algorithm Matlab source code)

说明：  PWM整流器，包括电流环。电压环。孤岛检测(PWM rectifier, which includes a current loop. Voltage loop. Islanding detection 双语对照)