【摘 要】
：
The directed motion of a Brownian particle in a flashing potential with various transition probabilities and waiting times in one of two states is studied. An e
【机 构】
：
Department of Physics,The Key Laboratory of Beam Technique and Material Modification of Ministry of
论文部分内容阅读
The directed motion of a Brownian particle in a flashing potential with various transition probabilities and waiting times in one of two states is studied. An expression for the average cycle period is proposed and the steady current J of the particle is calculated via Langevin simulation. The results show that the optimal cycle period rm,which takes the maximum of J, is shifted to a small value when the transition probability λ from the potential on to the potential off decreases, the maximalcurrent appears in the case of the average waiting time in the potential on being longer than in the potential off, and the direction of current depends on the ratio of the average times waiting in two states.
其他文献
识字教学是低年级语文教学的重要内容,也是教学的难点.要培养学生的识字兴趣,教给学生识字方法,培养识字能力.让学生对汉字有兴趣,体会到识字的成功与乐趣.
应用初中生物学教材的图表信息进行教学,可以激发学生学习生物学的兴趣,提高学生的生物学基本技能,增强学生的生物科学素养.探索了如何在初中生物教学中建构图表教学模型的问
在课堂教学中,教师的引导对于一节课的教学效果起着直接的影响作用,所以,身为语文教师,在教学过程中应善于引导学生,将学生成功引入教学的目的地.
In this paper, the existence of the exponential attractor for the thermohydraulics equations is proved, and the estimates of its fractal dimensions are also giv
A novel soluble π-conjugated polymer, poly[(3-octanoylpyrrole-2,5-diyl)-p-nitrobenzylidene](POPNBE), was synthesized by a five-step reaction. As a result of in
Piezoelectric ZnO layers with high resistivity for surface acoustic wave applications were prepared on polycrystalline diamond/Si substrates with (111) orientat
A convenient method for the chlorination in allylic position was developed by using the aqueous solution of sodium hypochlorite(2%-5% active chlorine) and an ac
Using form invariance under special infinitesimal transformations in which time is not variable, the non-Noether conserved quantity of the relativistic nonholon
The nonrelativistic dipole-length, -velocity and -acceleration absorption oscillator strengths for the 1s22s1s22p transitions of the lithium isoelectronic seque
The title compound (C17H16O2, Mr = 252.30) crystallizes in the monoclinic system,space group P21/c with a = 11.5763(14), b = 11.0321(11), c = 11.5094(13) (A),β