COGI

说明：  寻找图模块，可用于Matlab仿真电力系统，寻找随机攻击下的失电荷量。(The search graph module can be used in MATLAB simulation of power system to find the amount of loss of charge under random attack.)

短时傅里叶变换的matlab函数，有助于理解算法原理(Short-time Fourier transform matlab function, help to understand the algorithm principle)

一个很好的Matlab编制的数据降维处理软件(Matlab a good preparation of the data processing software Dimensionality Reduction)

help me to help another

使用有限差分法和分裂步傅里叶解法求解抛物方程，并增加散射体和地形的建模仿真。(Using the finite difference method and the split-step Fourier solution for solving the parabolic equation, and increase the scatterer and terrain modeling and simulation.)

本程序是绘制转子振动轴心轨迹的实验程序。 主要功能是进行绘制转子的轴心轨迹。(This procedure is the experimental procedure for drawing the axis of the rotor vibration axis. The main function is to draw the axis of the rotor track.)

说明：  用matlab语言实现图像的锐化算法，效果很好，可以参数值设置不同可得到不同的锐化效果(Matlab language used to achieve image sharpening algorithm, well, you can set different parameter values can be different sharpening effect)

48阶滤波器，包括两个matlab文件与滤波器的详细介绍与实现(48-order filter, including the two documents and filter matlab detailed introduction and implementation of)

坐标系转换公式 包括 坐标变换方法 ，坐标系转换方法， 其它坐标系转换方法。(Coordinate transformation formulas, including coordinate transformation, coordinate system conversion method, the other coordinate system conversion method.)

根据对真空蒸发镀膜的分析，在40×40的范围内分别蒸 发：1000、5000、10000、20000、30000个粒子。  利用2维数组记录每个点的粒子数。  初始粒的横纵坐标为0～40的均匀分布。  能量为（15，3）的正态分布。  在基体表面自由行走时损失1的能量。  若该点有粒子，即与其他粒子相遇时损失3的能量。  由低处向高处扩散，每扩散一层，损失4的能量，由高处 向低处扩散，损失3的能量。  当粒子的能量小于等于0时停留下来，该点的粒子数加1。  临界核的尺寸为10个粒子。  根据每个点粒子个数的不同，以不同的灰度显示这些点。 点越亮，则表示该点的膜越厚。  以图形方式显示粒子初始能量的正态分布情况(Based on the analysis of the vacuum evaporation coating, respectively, in the range of from 4040 evaporated: 1000,5000,10000,20000,30000 particles.  each point using 2-dimensional array to record the number of particles. The  initial grains transverse and longitudinal coordinates of a uniform distribution of 0 to 40. The  energy as a normal distribution (15,3).  1 energy losses in the substrate surface to walk.  point particles that 3 energy loss in the encounter with the other particles.  by the lower diffusion tops every diffusion layer, a loss of 4 energy diffusion from high to low, the energy loss of 3.  When the energy of the particles is less than or equal to 0:00 stay down, add 1 to the number of particles that point.  critical nucleus size of 10 particles.  these points, depending on the number of particles of each point is displayed in a different shade. Point, the brighter, the thicker the point of the fi)