Biot_Stoll

function dg=gplus(x,y,z,x1,x2,y1,y2,z1,z2,p) G=6.67e-11 t222=myfun(x,y,z,x2,y2,z2) t122=myfun(x,y,z,x1,y2,z2) t212=myfun(x,y,z,x2,y1,z2) t221=myfun(x,y,z,x2,y2,z1) t211=myfun(x,y,z,x2,y1,z1) t121=myfun(x,y,z,x1,y2,z1) t112=myfun(x,y,z,x1,y1,z2) t111=myfun(x,y,z,x1,y1,z1) dg=-G*p*1e6*(t222-t122-t212-t221+t211+t121+t112-t111) 转化为g.u. function y=myfun(x,y,z,xi,eta,zeta) R=sqrt((xi-x).^2+(eta-y).^2+(zeta-z).^2) temp1=(xi-x).*log((eta-y)+R) temp2=(eta-y).*log((xi-x)+R) temp3=(zeta-z).*atan((zeta-z).*R/((xi-x).*(eta-y))) 书中所给公式 temp3=-(zeta-z).*atan((xi-x).*(eta-y)./(zeta-z)./R) 上式变换 y=temp1+temp2+temp3 (function dg = gplus (x, y, z, x1, x2, y1, y2, z1, z2, p) G = 6.67e-11 t222 = myfun (x, y, z, x2, y2, z2) t122 = myfun (x, y, z, x1, y2, z2) t212 = myfun (x, y, z, x2, y1, z2) t221 = myfun (x, y, z, x2, y2, z1) t211 = myfun (x, y, z, x2, y1, z1) t121 = myfun (x, y, z, x1, y2, z1) t112 = myfun (x, y, z, x1, y1, z2) t111 = myfun (x, y, z, x1, y1, z1) dg =-G* p* 1e6* (t222-t122-t212-t221+t211+t121+t112-t111) converted the Gu function y = myfun, (x y, z, xi, eta, zeta) R = sqrt ((xi-x). ^ 2+ (eta-y). ^ 2+ (zeta-z). ^ 2) temp1 = (xi-x).* log ((eta-y)+R) temp2 = (eta-y).* log ((xi-x)+R) temp3 = (zeta-z).* atan ((zeta-z).* R/( (xi-x).* (eta-y))) book given formula Temp3 =- (Zeta-z)* ATAN ((Xi-X)* (ETA-y)/(Zeta- Z)/R) the above formula transform Y = temp1+temp2+temp3 )

convolutional code,create a matlab conde using in channel coding

图像中值滤波，利用中值滤波和低通滤波进行比较，分析PSNR，得出性能差别(image filtering, using median filter and a low-pass filter, PSNR analysis, the performance differences come)

说明：  基于SVPWM技术的永磁同步电机仿真模型(SVPWM technique based on simulation model of permanent magnet synchronous motor)

说明：  Matlab demonstration script for frequency modulation.供刚接触到matlab的朋友使用(Matlab demonstration script for frequency modulation. For刚接触to friends using matlab)

是MATLAB中常用的函数，非常适合初学者，对于工程师研究人员等也可作为手册来查(MATLAB function is commonly used, is suitable for beginners, for engineers, researchers, etc. may also be a manual check)

本程序应用矩量法计算了中心馈电的对称阵子的表面电流分布、E面辐射方向图及三维辐射方向图，并可以自行设定阵子长短。(The application of moment method program of the center symmetry feed stream of the surface current distribution, E plane radiation pattern and three-dimensional radiation pattern, and can set the length of time around.)

子脉冲为高斯波形的13位巴克码信号的matlab仿真输出。(Sub-Gaussian pulse waveform 13 Barker code signal matlab simulation output.)

说明：  基于MATLAB的软件雷达仿真平台的设计，很好的一篇文章(MATLAB-based software platform for the design of radar simulation, a very good article )

fisher判别法 本实验通过编制程序体会Fisher线性判别的基本思路，理解线性判别的基本思想，掌握Fisher线性判别问题的实质。 (fisher discriminant method of the present experiment with basic programming experience Fisher linear discriminant ideas, understand the basic idea of ​ ​ a linear discriminant, master Fisher linear discriminant substantive issues.)