20110907

PIANO CREATED simple piano in C programming language

matlab中实用的静止无功补偿装置的仿真电路，主要用到了晶闸管控制电抗器和晶闸管投切电容器(in practical circuit simulation matlab static reactive power compensation device, mainly used in the thyristor controlled reactor and thyristor switched capacitor)

变压器内部绕组匝间短路故障仿真，能模拟三相变压器三相短路、单相短路、两相短路和两相短路接地的情况，仿真得到短路电流波形。(Between the windings of the transformer internal short circuit fault simulation, can simulate three-phase transformer three-phase short-circuit, single-phase short circuit, two-phase short-circuit and two-phase short-circuit ground, simulated short-circuit current waveform.)

Math Paramteric eqations

地震勘探中，声学介质下的波传播正演模拟，采用高精度有限差分方法，规则网格的，含有计算差分系数的子程序(Seismic exploration, acoustic wave propagation medium under the forward modeling, finite difference method using high-precision, regular grid containing the subroutine calculates the difference coefficients)

本案例通过对图像加入高斯噪声，利用sym4小波函数对该图像和信号进行三级分解，用小波阀值去噪的方法对该图像进行去噪，并给出了仿真结果。(This case through join Gaussian noise image, use the sym4 wavelet decomposition of the image and signal, the wavelet threshold to filter method for the image denoising is presented, and the simulation results.)

说明：  用于打开XRF中的能谱数据，对数据进行小波变换，得到比较好的效果(For opening XRF spectroscopy data, the data is the wavelet transform, to obtain better results)

利用CFD软件，采用雷诺应力模型分别计算了300型和250型水力旋流除砂器的内流 场，得到了2种水力旋流除砂器的轴向、径向、切向速度及压强的分布曲线。通过对所得结果的 分析，发现模拟结果基本符合旋流除砂器的运行规律。比较2种旋流除砂器的内流场，表明改进 的300型水力旋流除砂器的结构及分离能力优于原来250型水力旋流除砂器，为水力旋流除砂器 的优化设计和选型提供了可靠的设计依据。(use CFD software, Reynolds stress model used to calculate the respective 300-and 250-type sander hydrocyclones the flow field, been two kinds of hydrocyclones sander axial, radial and tangential velocity and pressure in the distribution curve. Based on the results of the analysis, the simulation results are consistent with the Cyclone sander operating rules. Comparing two kinds of Cyclone sander within the flow field, show improved 300 Desanding Hydrocyclones the structure and separation capacity than the original 250-hydrocyclone sander, Desanding Hydrocyclones for the optimum design and selection provided a reliable basis for the design.)

主成分分析和偏最小二乘SquaresPrincipal成分分析（ PCA ）和偏最小二乘（ PLS ） ，广泛应用于工具。此代码是为了显示他们的关系，通过非线性迭代偏最小二乘（ NIPALS ）算法。 (Principal Component Analysis and Partial Least SquaresPrincipal Component Analysis (PCA) and Partial Least Squares (PLS) are widely used tools. This code is to show their relationship through the Nonlinear Iterative PArtial Least Squares (NIPALS) algorithm. )

Texture detection using GLCM. GLCM describes four properties known as contrast, correlation, energy and homogeneity.