2008-7-11 12:31
3129779
――对交通流跟驰模型线性稳定性分析的讨论!
如题,我做的是Bando 模型的研究,需要用到线性稳定性分析,以及Fourier模,顺便问一下,对Bando的模拟时空图需要用数值解法把位置点的值解出来吗?谢谢!!!水寿松注:原帖子标题是:《请各位老师推荐一下交通流线性稳定性分析的材料 !谢谢了!》由于讨论的比较完整了,现改为:《[问与答]――对交通流跟驰模型线性稳定性分析的讨论!》
2008-7-11 16:14
海底
</a> (共 100998 字节)
推荐paper―PhysRevE_70_066134:Stabilization effect of traffic flow in an extended car-following model based on an intelligent transportation system applicationH. X. Ge(葛红霞),1 S. Q. Dai(戴世强),1 L. Y. Dong(董力耘),1 and Y. Xue(薛郁)2 1Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, China 2Department of Physics, GuangXi University, Nanning 530004, ChinaAn extended car following model is proposed by incorporating an intelligent transportation system in traffic. The stability condition of this model is obtained by using the linear stability theory. The results show that anticipating the behavior of more vehicles ahead leads to the stabilization of traffic systems. The modified Korteweg-de Vries equation (the mKdV equation, for short) near the critical point is derived by applying the reductive perturbation method. The traffic jam could be thus described by the kink-antikink soliton solution for the mKdV equation. From the simulation of space-time evolution of the vehicle headway, it is shown that the traffic jam is suppressed efficiently with taking into account the information about the motion of more vehicles in front, and the analytical result is consonant with the simulation one.由此文章的参考文献拓展开来搜寻相关内容,祝 顺利!作者都是会员或是顾问团成员,自己人嘛,就推荐一下他们的文章,呵呵!
2008-7-11 19:05
qulitin
From the simulation of space-time evolution of the vehicle headway, it is shown that the traffic jam is suppressed efficiently with taking into account the information about the motion of more vehicles in front, and the analytical result is consonant with the simulation one.how to understand the word"suppress" in the obove stentence??
2008-7-12 15:31
zty98
"suppress"在这里是“抑制”的意思
2008-7-13 12:09
tomzz
好不容易又逮到一个机会,再整一下水寿松版主,呵呵!"suppress"在这里是“减少”的意思“suppress” could mean either “prohibit”(抑制) or “reduce” (减少) in a dictionary. Here, I believe “the traffic jam is suppressed efficiently with taking into account the information about the motion of more vehicles in front” means that when n > 1, a_c or the unstable region gets smaller rather than eliminated. Therefore, the traffic jam is overall “reduced”.论文中参考文献[19]作者的名字给拼错了。有些单位也还根据科研人员论文的引用率来确定奖金的多少呢!你们拼错了人家的名字,他的论文引用进不了资料库,说不定就少拿奖金了。下一次上四位作者的论文稿若落到他或他的朋友的手里的话,说不定也就小刁难一下,让你们也尝一尝少拿或晚拿奖金的味道,呵呵!这下整完了。快闪! :)
2008-7-13 13:40
longnimami
非常感谢!
2008-7-13 14:42
112233332211
偶前段时间将此求助帖发给作者,希望她能够回复,由于她没有时间,因此我只是代为发布消息,偶没有研究这个方向的内容,因此不熟悉这个领域。现在作者既然自己上来回复帖子了,偶想她自然会回复tingeMM你的疑问的。一年前交通流论坛开坛时,tingeMM你来玩了一把,现在一年了,你又来了,pfpf,不过俺希望你玩的同时,能够给出你对交通流的一些认识,这样的话,才不枉费你心机提问了!再次感谢tingeMM对本论坛的关心!
2008-7-13 21:58
matlab爱好者
本人还是倾向于用“抑制”这一词来解释,“suppress”不仅仅指进入交通阻塞状态的车辆数“减少”的问题,而是整个宏观的状态得到有效的改善。仁者见仁,智者见智,我只表明我的观点。文献【19】确实是本人的疏忽,在这里向被引用的作者郑重道歉,同时也向帮我发现论文错误的网友致谢!以后我会注意校正文章的,减少错误。在这里应该是“减少”。
2008-7-14 04:05
dgwetwet
请问葛大侠,我拜读了您的大作,也看了其他几篇有关线性性稳定性分析的文章,文中都用fourier模把扰动项展开,您用的是y=Aexp(ikj+zt),也有用y=exp(ikj+iw(k)t)展开的,能否帮推荐有关fourier模的书。(z=z1(ik)+z2(ik)^2+...也搞不懂) 谢谢大侠指点迷津!
2008-7-14 23:40
caotong115
这两种形式都行,A带入方程中都被约去了所以结果也是一样的。我也是从文献中自己推的,无法给你推荐书籍。
2008-7-15 22:11
csiceli
用长波模式展开,ik代表波数,z=z1(ik)+z2(ik)^2+...波长较长,ik就小。
2008-7-16 03:33
87687424
葛红霞,你好!你能不能将你上面的那篇文章中的相变分离曲线(i.e. the coexisting curve)的解析式是怎样推导出来的,谢谢!
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