Properties of Traffic Risk Coefficient

We use the model with the consideration of the traffic study the relationship between the traffic risk coefficient interruption probability （Physica A 387（2008）6845） to and the traffic interruption probability. The analytical and numerical results show that the traffic interruption probability will reduce the traffic risk coefficient and that the reduction is related to the density, which shows that this model can improve traffic security.     

Instructions for Authors

<正>Chinese Physics B (Chin. Phys. B), formerly titled Chinese Physics, is an international comprehensive academic journal, aiming to publish original papers and letters reflecting creative and innovative achievements in physics, as well     

编者的话

人类的认识是在实践、认识、再实践、再认识的过程中,不断地纠正错误,走向与逼近真理的.正如我国著名数学家华罗庚所说:都是经过很多次失败,走过许多弯路才成功的.如何才能尽快发现错误、纠正错误,少走弯路呢?一方面,需要不断地自我反思,总结经验,吸取教训;另一方面,则是需要打开大门,广泛听取不同意见,集思广益.     

Instructions for Authors

<正>Chinese Physics B (Chin. Phys. B), formerly titled Chinese Physics, is an international comprehensive academic journal, aiming to publish original papers and letters reflecting creative and innovative achievements in physics, as well as review papers about important     

Im Anfang was das Bewusstsin, und das Bewusstsein war bei Sich Selbst, und das Bewusstsein was Sich Selbst. An actress must never lose her ego without it she has no talent. --Tom Lehrer

据说量子物理和相对论是现代物理的两大支柱.不过,这两大支柱是建立在self-adjointness,eigenvalue（vec-tor）,proper time（length）,proper Lorentz group,self-interference等事关＂自己的＂概念碎石上的.没了自我,物理学似乎少了很多内容.     

物理学咬文嚼字之三十六 Στοιχειαιο

Euclid的《几何原本》同化学术语中的化学计量比都来自希腊语Στοιχεια■ο,反映的是古希腊原子论的精神.     

Exact Solutions to Short Pulse Equation

In this paper, dependent and independent variable transformations are introduced to solve the short pulse equation. It is shown that different kinds of solutions can be obtained to the short pulse equation.     

Structure properties and Noether symmetries for super-long elastic slender rod

DNA is a nucleic acid molecule with double-helical structures that are special symmetrical structures attracting great attention of numerous researchers. The super-long elastic slender rod, an important structural model of DNA and other long-train molecules, is a useful tool in analysing the symmetrical properties and the stabilities of DNA. This paper studies the structural properties of a super-long elastic slender rod as a structural model of DNA by using Kirchhoff＇s analogue technique and presents the Noether symmetries of the model by using the method of infinitesimal transformation. Baaed on Kirchhoff＇s analogue it analyses the generalized Hamilton canonical equations. The infinitesimal transfornaationa with rcspect to the radial coordinnte, the gonarnlizod coordinates, and the Cluasi-momenta of 5he model are introduced. The Noether gymmetries and conserved qugntities of the model are obtained.