many activities will use the same place, every activity ai has its'  start time si and finish time fi.let the number of activities to be as many as possible. 1. dynamic programming use ak be a knife to cut the set activities into two parts and recurs…

目录 概括 Sparse PCA Formulation 非常普遍的问题 Optimality Conditions Eigenvalue Bounds 算法 代码 概括 这篇论文,不像以往的那些论文,构造优化问题,然后再求解这个问题(一般都是凸化).而是,直接选择某些特征,自然,不是瞎选的,论文给了一些理论支撑.但是,说实话,对于这个算法,我不敢苟同,我觉得好麻烦的. Sparse PCA Formulation 非常普遍的问题 Optimality Conditions 这一小节,论文给出了…

作者:supernova 出处:http://community.topcoder.com/tc?module=Static&d1=tutorials&d2=greedyAlg John Smith is in trouble! He is a TopCoder member and once he learned to master the "Force" of dynamic programming, he began solving problem after p…

http://www.personal.kent.edu/~rmuhamma/Algorithms/MyAlgorithms/Greedy/greedyIntro.htm Greedy Introduction Greedy algorithms are simple and straightforward. They are shortsighted in their approach in the sense that they take decisions on the basis of…

Copied From:http://csfieldguide.org.nz/en/curriculum-guides/ncea/level-3/complexity-tractability-TSP.html This is a guide for students attempting Complexity and Tractability in digital technologies achievement standard 3.44. This guide is not officia…

之前光看理论是不行滴,一定要实践,实践啊,不然永远都是门外汉!! 嗯嗯,把找到的一段源码贴上先,稍微修改了一下: #include <winsock.h> #include <stdio.h> #include <string> #define PORT 5010 #define MSGSIZE 1024 ; #pragma comment(lib, "ws2_32.lib") DWORD WINAPI WorkerThread(LPVOID lpP…

本文转自:http://msdn.microsoft.com/en-us/library/ee264174(v=vs.100).aspx This topic applies to Windows Workflow Foundation 4 (WF4). Activities created using .NET Framework 3.0 or .NET Framework 3.5 can be used in a .NET Framework 4 workflow by using the…

Awesome Courses  Introduction There is a lot of hidden treasure lying within university pages scattered across the internet. This list is an attempt to bring to light those awesome courses which make their high-quality material i.e. assignments, lect…

(一)SSL/TLS协议运行机制的概述 一.作用 不使用SSL/TLS的HTTP通信,就是不加密的通信.所有信息明文传播,带来了三大风险. (1) 窃听风险(eavesdropping):第三方可以获知通信内容. (2) 篡改风险(tampering):第三方可以修改通信内容. (3) 冒充风险(pretending):第三方可以冒充他人身份参与通信. SSL/TLS协议是为了解决这三大风险而设计的,希望达到: (1) 所有信息都是加密传播,第三方无法窃听. (2) 具有校验机制,一旦被篡改,通…

CABaRet:利用推荐系统进行移动边缘缓存 本文为SIGCOMM 2018 Workshop (Mobile Edge Communications, MECOMM)论文. 笔者翻译了该论文.由于时间仓促,且笔者英文能力有限,错误之处在所难免:欢迎读者批评指正. 本文及翻译版本仅用于学习使用.如果有任何不当,请联系笔者删除. 本文作者包含4位,Savvas Kastanakis@University of Crete and FORTH, Greece:Pavlos Sermpezis@FOR…