博文
- 日本测试车间距对交通的影响
- 从理论上讲，充分的车辆间距离有助于抑制交通堵塞。8月16日，日本研究人员利用盂兰盆节（团聚和祭祖的日本传统节日）返城高峰，就保持车间距对缓解交通堵塞起到的作用进行了测试。 据日本《读卖新闻》报道，试验选择在中央高速公路位于东京都和神奈川县交界处的车道进行，研究人员分乘6辆汽车行进，并始终保 ...
- Traffic Jams Happen, Get Used to It
- By Dennis Normile Science NOW Daily News 28 March 2008 From: http://sciencenow.sciencemag.org/cgi/content/full/2008/328/1 Roundabout. Too many cars equals a traffic jam, even without an external cause. Ever wondered what causes those inexplica ...
- 'Crowd quakes' could be predicted by CCTV analysis
- Pressure waves that travel through tightly-packed crowds on the verge of panic could warn of impending disasters, such as the stampede on Saudi Arabia's Jamarat Bridge during the Hajj of 2006 , researchers say. The team studied footage of the tragedy and found crowds can experience sudden chang ...
- 个体行为差异是合作演化的关键
- 个体行为差异是合作演化的关键 《自然》January 10, 2008 如果自然选择有利于自私行为，那么为什么合作在包括人类在内的很多物种中都很普遍？McNamara等人通过演化模拟，提出了一个新颖的、基于合作与选择之间的积极共演化反馈的演化机制。如果个体在合作程度上有所不同，如果它们能够根据其各自的合作水平来决定 ...
- 两个博弈问题
- Snowdrift game 和 Prisoner's dilemma game 达尔文的进化论提出以后，从生物学上解释为什么物种中还依然存在着广泛的合作（cooperation）就成了一个长期困扰生物学家的问题。物理学家在囚徒困境（Prisoner's dilemma game）的基础上给出的解释，认为有大概29%的合作行为，但是这远低于实际中发生的情况 ...
- 交通流中常用的几个名词
- Relations among Density, Average velocity and Flux From:http://www.kochi-tech.ac.jp/~cheon/traffic_e/traff_e021.html So the argument seems to be headed for the diversion of the interest of drivers and the administrators. But fortunately, the two quantities characterizing both interests are ...
- 动态网络分析
- 刘建国blog上的一篇文章，地址：http://blog.sina.com.cn/u/53dc857201000b20 （一直在想这个刘建国是不是nature上的那篇Complexity of Coupled Human and Natural Systems的作者Jianguo Liu呢） 动态网络分析一直是复杂网络研究领域的一个非常活跃的领域。对于与日俱 ...
- Connections Get You Everywhere, but Slowly
- 热度 1
- 11月2日PRL上有一篇文章，今天才有时间看，提出一个有限路径渗渝（Limited Path Percolation， LPP）模型，理论上解决了一个网络何时开始变得效率低下的问题，而不像以往的研究只关注一个网络什么时候开始坍塌，在APS的focus上有相关的评论 Limited Path Percolation in Complex Networks Eduardo L ...
- Mark Newman在University of Michigan讲Network theory的课程提纲
- 热度 1
- Complex Systems 535: Network Theory Instructor: Mark Newman Winter 2004 General resources There is no set text for this course because no one has written one yet. But here are some general references that, between them, cover much of the material. ...
- Percolation Theory and Forest Fires --Simulation
- Simulation Animation The network graph (Delaunay triangulation DT(V) ) is shown below. The nodes, representing cells, have been numbered from 0 to 19. A coordinate system is used so that distance and orientation of edges is defined. To simulate the spread of fire, we consider ...
