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function [alpha,N,U]=youxianchafen2(r1,r2,up,under,num,deta)      %[alpha,N,U]=youxianchafen2(a,r1,r2,up,under,num,deta)   %该函数用有限差分法求解有两种介质的正方形区域的二维拉普拉斯方程的数值解   %函数返回迭代因子、迭代次数 ...

步骤一 按快捷键Ctrl+N新建A4大小空白横向文档，并填充颜色为浅绿色。 步骤二 选择工具箱中的“贝塞尔工具”绘制荷叶，使用“形状工具”进行节点调整。填充轮廓色和填充色。 步骤三 在工具箱中选择“网状填充工具”设置网格中的行列数为3*3，鼠标框选中间4个节点，统一填充颜色为（R：0，G:153，B：51）。 步骤四 选择“贝 ...

在人们的生产实践中，经常会遇到如何利用现有资源来安排生产，以取得最大经济 效益的问题。此类问题构成了运筹学的一个重要分支—数学规划，而线性规划(Linear Programming 简记 LP)则是数学规划的一个重要分支。自从 1947 年 G. B. Dantzig 提出 求解线性规划的单纯形方法以来，线性规划在理论上趋向成熟，在实用中日益广 ...

%球体 close all; G=6.67e-11; R=2;%球体半径 p=4.0;%密度 D=10.0;%深度 M=(4/3)*pi*R^3*p;%质量 x=-20:1:20; g=G*M*D./((x.^2+D^2).^(3/2)); Vxz=-3*G*M*D.*x./((x.^2+D^2).^(5/2)); Vzz=G*M.*(2*D^2-x.^2)./((x.^2+D^2).^(5/2)); Vzzz=3*G*M.*(2*D^2-3.*x.^2)./((x.^2+D^2).^(7/2)); subplot(2,2,1) plot(x,g,'k-'); xl ...

将ug软件中的刀轨刀路转换成fanuc控制系统数控加工中心可执行的的g代码

书名：bessel functions and their applications 作者：B. G. Korenev

PRODUCT DESCRIPTION The AD810 is a composite and HDTV compatible, current feedback, video operational amplifier, ideal for use in systems such as multimedia, digital tape recorders and video cameras. The 0.1 dB flatness specification at bandwidth of 30 MHz (G = +2) and the different ...

The contemporary view of the Smart City is very much static and infrastructure- centric, focusing on installation and subsequent management of Edge devices and analytics of data provided by these devices. While this still allows a more efficient management of the city’s infrastructure, optimization ...

At present, there is a strong worldwide push toward bringing fiber closer to indi- vidual homes and businesses. Fiber-to-the-Home/Business (FTTH/B) or close to it networks are poised to become the next major success story for optical fiber com- munications. In fact, FTTH connections are currently ex ...

Emerging technologies such as WiFi and WiMAX are profoundly changing the landscape of wireless broadband.  As  we evolve into future generation wireless networks, a primary challenge is the support of high data rate, integrated multi- media type traffic over a unified platform. Due to its ...