本题题目有点绕,结合图例大概可知,P(x,y)是以点给出的一个凸包,T是一个点集合,也构成一个凸包,构成的方法就是将原点(0,0)在P(x,y)的边上跑,移动坐标轴,其构成的最远点是个凸包,我们可以画出几个例子,可以看出,T一定是中心对称图形,而P与T相似,P也一定要是中心对称图形,且如果P是奇数条边就一定不满足条件,直接对x,y坐标判断是否是中心对称图形即可,相邻两个点坐标之差与对称的点的差相同 #include<bits/stdc++.h> using namespace std; #de…

题目大意: 给定一个图形S,让这个图形任意平移,但是要保证原点(0,0)一直在它的内部或者边上 最后把它能移动到的所有位置进行拼合可以得到一个图形T 问图形S与图形T是否相似 点会按照逆时针顺序给出 x和y都是整数 图1:图示正三角形平移后拼合可以得到一个正六边形 图2:斜正方形平移后拼合可以得到一个大的斜正方形 解题思路: 证: 首先能得到的结论是,不论给定的是什么图形,让他平移后得到的图形T绝对是一个中心对称图形(这个草稿纸上证明下吧,或者下面也会有证明) 所以要想让某个图形与一个中心对称图…

Problem A. AerodynamicsTime Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://acm.hust.edu.cn/vjudge/contest/view.action?cid=86821#problem/A Description Bill is working in a secret laboratory. He is developing missiles for national security projects. Bi…

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參考網址: 1. http://gazebosim.org/tutorials 2. http://gazebosim.org/tutorials/browse Gazebo Tutorials Gazebo tutorials are organized into Guided and Categorized. Documentation is also available for the API, and a help forum is located at Gazebo Answers.…

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Boeing Scrambles To Restore Faith In Its 737 MAX Airplane After Crashes In the wake of two deadly crashes of its 737 MAX jet in recent months that killed 346 people and grounded those planes worldwide, Boeing continues to produce more than 50 of the…

stall stall and flow separation Table of Contents 1. Stall and flow separation 1.1. Separation of Boundary Layers 1.2. Types of stall 1.3. Post stall airfoil data for BEM 1.3.1. Extraplolation methods: 1.3.2. Reference 1.4. Parameters affects stall 1…

naca0012 naca0012 Table of Contents 1. NACA0012 lift and drag from 0-180 1.1. Data– Cl Cd vs. aoa 2. Naca0012 Stall 2.1. dynamic stall 3. Numerical Modelling for naca0012 at Stalled AOAs 3.1. Turbulence Model for Stalled airfoil 4. free surface & nac…

转载自:http://www.cnblogs.com/fortran/articles/1996927.html boundaryFoam Steady-state solver for 1D turbulent flow,typically to generate boundary layer conditions at an inlet, for use in a simulation Example Problems: boundaryLaunderSharma model which h…