filter1

基于神经网络的y=|sin（x)|的matlab编程(Based on neural network y = | sin (x) | in matlab programming)

阶跃信号与正弦信号调制，在同一张图纸上绘制四个子图。这是一个很基础的编程应用。(Step signal with a sinusoidal signal modulation, drawn with a drawing on four subgraphs. This is a very basic programming application.)

非常好用，是一个用MMSE和LS来实现OFDM检测的源代码，希望对大家有帮助(Very easy to use is a use of MMSE and the LS to realize OFDM detection of the source code, in the hope that everyone has to help)

说明：  详细的双馈发电机模型，包括变桨系统、偏航系统、控制系统、齿轮箱等。(Detailed model of doubly-fed generator, including the pitch system, yaw system, control system, gear boxes.)

用LBM的方法模拟方腔流动，结果和真实的情况很类似，LBM可以很好的模拟方腔流动(LBM methods using simulated cavity flow, results, and the real situation is similar, LBM can be a good simulation of cavity flow)

主要用来计算给定观测序列的概率（求解HMM中的第一个问题）(Mainly used to calculate the probability of a given observation sequence (HMM solving the first problem))

说明：  通过并行压缩进行二维信号压缩，提出了一种利用并行压缩传感技术对二维信号进行压缩的新方案。根据这个原理，译码器的重新构造可以并行进行。通过对二维信号进行某些排列，可以确保所有列具有大致相同的密度级别，并且可以使用相同的测量矩阵进行采样。这样可以避免二维信号的矢量化，从而大大减小测量矩阵的尺寸。我们证明，如果排列良好，重建均方误差的上限会更紧。为了说明这一方案，我们将其应用于视频压缩并使用不同帧的排列有两种：参考帧的基于Z字形扫描的排列和非参考帧的基于块测试的排列。仿真结果表明，在相同的压缩比下，峰值信噪比比比在无置换情况下可提高3-7db左右。(we propose a new scheme to compress 2D signals using parallel compressed sensing. According to this seheme, the reeonstruction at the decoder can be performed in parallel. By performing certain permutation on a 2D signal, all columns are insured to have approximately the same density level and can be sampled using the same measurement matrix. In this way, vectorization of a 2D signal can be avoided, and thus the size of the measurement matrix can be dramatically reduced. We prove that with a good permutation, we can have a tighter upper bound on reconstruction mean square error. To illustrate this scheme, we apply it to video compression and use two kinds of permutations for different frames: the zigzag-scanbased permutation for reference frames and the block-test-based permutation for non-reference frames. Simulation results show that under the same compression ratio, the peak signal-to-noise ratio can be improved by approximately 3-7 dB compared to the case without permutation.)

该算法是通过统计图像某一边缘法向方向的灰度变化情况来进行评价。即灰度变化越剧烈， 边缘越清晰， 图像也越清晰。(The algorithm is an edge of the image through the statistical method to change the direction of the gray scale to be evaluated. The more intense the gray change, the more clear the edge of the image are more clear.)

fdtd program 2D using PML (Perfect Match Layer)

A simulink model for a direct online starting of an induction motor connected directly across the line.