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此代码是BP网络的MATLAB仿真程序，实现的是对曲线的拟合。(This code is a BP network, MATLAB simulation program, implementation is the fitting curve.)

MATLAB经典示例 以示参考 十分有用(MATLAB classic example to show reference useful)

说明：  matlab code for home work rayleigh

matlab有关数学建模的资料，在数学建模中有很大的帮助(Matlab relevant mathematical modeling of the material, in mathematical modeling a lot of help )

说明：  这是关于粒子群优化算法优化回声状态网络的材料，特别适合初学者，可以帮助你们快速学习群体智能算法优化神经网络(This material is about particle swarm optimization algorithm optimization esN, especially suitable for beginners, can help you quickly learn swarm intelligence algorithm optimization neural network)

说明：  《神经－模糊和软计算》（Neuro-Fuzzy and Soft Computing）一书的例子程序。 作者： Jyh-Shing Roger Jang是个日本人，翻译成中文好像是水谷英二。("neuro-fuzzy and soft computing" (neuro-fuzzy and Soft Computing), an example of the procedure. Author : Jyh-Shing Roger Jang is the Japanese translation into Chinese water is like two British Valley.)

关于空时编码的仿真代码，希望对你有所帮助哈。(On space-time coding simulation code, I hope for your help Kazakhstan.)

梯度下降法是一個一階最佳化算法，通常也稱為最速下降法。 要使用梯度下降法找到一個函數的局部極小值，必須向函數上當前點對應梯度（或者是近似梯度）的反方向的規定步長距離點進行疊代搜索。如果相反地向梯度正方向疊代進行搜索，則會接近函數的局部極大值點；這個過程則被稱為梯度上升法。(The gradient descent method is a first-order optimization algorithm, also commonly referred to as the steepest descent method. To find the local minimum of a function using the gradient descent method, an iterative search must be performed to the specified step distance point in the opposite direction of the gradient (or approximate gradient) of the current point on the function. If the search is reversed in the opposite direction to the positive direction of the gradient, it will approach the local maximum point of the function; this process is called the gradient ascent method.)

展示了如何生成一个随机无标度网络图，基本结构分析，包括度分布、聚类系数等。观察两种类型的攻击对网络的影响：随机攻击（所有的几点有相同的概率从网络中删除）、有目标地选择连接度最大的节点（节点度最大的节点从网络中删除）。(Shows how to generate a random scale-free network graph, basic structural analysis, including degree distribution, clustering coefficients, etc. Observe the impact of two types of attacks on the network: Random attacks (all points have the same probability of being removed from the network), and select the node with the highest degree of connectivity (the node with the highest node degree is removed from the network).)

利用时域有限差分法(FDTD法)对三维时谐电磁场进行模拟(Using finite difference time domain method (FDTD method) of three-dimensional time-harmonic electromagnetic field simulation)