LBGK_D2Q9_poiseuille_channel2D

transducer design for ceramics pzt-4

Hi...here is several matlab code inaudio pprocessing

H4桥，光伏并网逆变器电压电流双环仿真模型(H4，solar grid inverter with voltage and current loop control)

OFDM的详细仿真代码，有信道编码，调制，信道估计等(OFDM detailed simulation codes, channel coding and modulation, channel estimation, etc.)

separation of sounds

matlab很多使用的画图小程序，非常使用，囊括了很多，运行可靠！(matlab drawing a lot of small programs used, very used, include a number of reliable operation!)

nmf即是非负矩阵分解，就是把一个非负的源矩阵分解为两个非负的矩阵，在光谱解混中用的较多。(nmf that is non-negative matrix factorization, it is the source of a non-negative matrix factorization of two non-negative matrix, more mixed with the solution in the spectrum.)

BP神经网络容易陷于局部极小值，PSO算法在无约束非线性函数优化方面性能优越，通常可以直接找寻到全局最优解，即使不能搜多到全局最优解，也距离全局最优点不远。当然，基本PSO算法陷入局部极值也是有的。对于这个缺点目前还没有找到比较有效、省市的解决方案。本案例实现利用PSO算法和BP算法共同训练神经网络，先将网络进行PSO算法训练，然后BP算法接着进行小范围精细搜索，PSO算法训练神经网络的本质就是将输出误差函数（即能量函数）看成目标函数，PSO对能量函数进行全局寻找最小值。(BP neural networks are prone to local minimum values. The PS algorithm has superior performance in the optimization of unconstrained nonlinear functions. It can usually find the global optimal solution directly. Even if it can not find more global optimal solutions, it is not far from the global best. Of course, there is also a local extreme of the basic PO algorithm. For this shortcoming, there is no more effective, provincial and municipal solution. This case realizes the use of the SO algorithm and the BP algorithm to train the neural network. First, the network is trained in the SO algorithm, and then the BP algorithm is followed by a small range of fine searches. The essence of the PO algorithm training neural network is to regard the output error function(ie, the energy function) as the objective function, and the PO seeks a global minimum value for the energy function.)

压缩感知信号重建 梯度投影法信号重建代码(Compressed sensing signal reconstruction signal reconstruction code gradient projection method)

此文件是matlab里典型的Berizer曲线的动态设计的源代码，可以方便实现该曲线的动态表达。(This file is in the typical Berizer matlab curve of the dynamic design of the source code, you can easily achieve the dynamic expression of the curve.)