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matlab code of 3d in porous media

2D周期性圆柱组成的，lens的几何设计和delay的计算，使用各项同性圆柱(2D periodic cylinder’s delay)

说明：  自适应中值滤波算法，可以用于图像去噪，比传统的中值滤波效果更好，运行时间更短(Adaptive median filter algorithm can be used for image denoising, than the traditional median filter is better, shorter running time)

数值方法（MATLAB版）第三版 英文 本书介绍了数值方法的理论和实践知识。以实际例题说明概念定理，含大量习题和编程题。(numerical methods (MATLAB version) English third edition of the book on the numerical method of theoretical and practical knowledge. Practical examples to clarify the concept theorem, with a large number of exercises and programming problems.)

Using to call in matlab

不错的FDTD上手资料，合适光波导研究和其他研究，希望对大家有用。(Good FDTD started information, the appropriate optical waveguide and other studies, and hope to be useful.)

牛顿方法用于优化问题，其中包括最初等的牛顿方法。以及初始点不可行的算法。(Newton optimization)

此代码描述的是正弦函数的频谱图,其采样点不同,频谱图的差别(This code is a sine function described in the frequency spectrum, the sampling point is different from the difference spectrum)

信号处理滤波器程序，可以加窗函数等操作，(Signal processing filter procedures, functions and other operations can be added to the window,)

Backpropagation, an abbreviation for backward propagation of errors , is a common method of training artificial neural networks used in conjunction with an optimization method such as gradient descent. The method calculates the gradient of a loss function with respects to all the weights in the network.