pls

matlab code that generates input file for gridgen to make automated mesh in conical and bell shape nozzles

说明：  纯水的负折射率计算，使用LH模型，适用频率范围小于3THz，可用于计算雨滴衰减模型(Negative refractive index of pure water calculated using the LH model for the frequency range is less than 3THz, can be used to calculate the rain attenuation model)

利用macd背离信号开单,它能省去很多人为的干预，自动交易，避免人性的恐惧和贪婪的弱点！(it use MACD divergence to trade!)

Tutorial to design JTAPI applications

有限差分方法（网格法）是最早使用的一种电磁场数 值计算方法。 边值问题 物理思想：场域离散。 （连续区域→网格和节点） 数学基础：差分原理。 （微商→差商） 线性代数方程组 §6-3 有限差分方法 作为数值计算方法，有限差分法将连续场域的问题变换 为离散系统的问题（连续场域划分为若干个细小的区域：网 格和节点）。也就是说通过离散化模型上各离散点的数值解 来逼近连续场域内的真实解。(The finite difference method (grid method) is the earliest use of an electromagnetic field the number of Value method. Boundary Value Problems Physical idea: the field of discrete. (Contiguous area → grid nodes) Mathematical foundations: the difference principle. (The Derivative → difference quotient) Linear algebraic equations. § 6-3 Finite Difference Method Numerical methods, finite difference method will transform the problem of the continuous field For discrete systems (continuous field is divided into several small areas: network Grid nodes). That is, the value of the discrete points in the discrete model solution To approximate the true solution of the continuous field domain.)

This is a good example of brownian motion is cartesian coordinates. the results are illustrated

超声仿真工具包，它可以仿真超声探头所形成的声场和超声图像等。主要是利用Matlab进行仿真。(The ultrasonic simulation toolkit can simulate the sound field and ultrasonic image of the ultrasonic probe. The main purpose is to make use of Matlab to simulate.)

说明：  三电平逆变器模型,基于空间矢量算法，信号源为恒定三相交流信号经旋转变化得到控制脉冲信号(three level invetrer model)

MATLAB电机仿真精华50例,源代码。包括直流电机，同步电机，异步电机的经典仿真。(MATLAB motor simulation essence of 50 cases, the source code. Classic DC motor, synchronous motor, induction motor simulation.)

寻找距离某一点最近的几个点，返回对应的点的位置及距离该点的距离(Find a few points closest to a given point , returns the corresponding location of the point and the distance from the point)