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Appearance of Stochastic Resonance in Protein Motor System

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Communications in Theoretical Physics 2007年第5期47卷 861-864页

作者： li jing-Hui Faculty of Science Ningbo University Ningbo 315211 China

A protein motor system driven by sine electric field is investigated. The signal-to-noise ratio （SNR） is derived in the adiabatic limit. The phenomenon of stochastic resonance is found for this protein motor system.

关键词： stochastic resonance protein motor

Probability Density and Statistical Properties for a Three-State Markovian Noise and Escape of Particles for a System Driven by This Noise

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Communications in Theoretical Physics 2008年第8期50卷 391-395页

作者： li jing-Hui Faculty of Science P.O. Box 58 Ningbo University Ningbo 315211 China

A three-state Markovian noise is *** probability density and statistical properties are obtained. Escape of particles for a system with potential barrier only driven by this noise is *** is shown that,in some circumstances,this noise can make the particles escape over the potential barrier;but in other circumstances,it cannot. Resonant activation phenomenon appears for the system considered by us.

关键词： probability density noise escape

Globally Coupled Chaotic Maps with Constant Force

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Communications in Theoretical Physics 2008年第3期49卷 665-668页

作者： li jing-Hui Faculty of Science P.O. Box 58 Ningbo University Ningbo 315211 China CCAST （World Laboratory） P.O. Box 8730 Beijing 100080 China

We investigate the motion of the globally coupled maps （logistic map） with a constant force. It is shown that the constant force can cause multi-synchronization for the globally coupled chaotic maps studied by us.

关键词： chaotic map synchronization

Current Reversal and Negative Conductance for a Super-Conducting Junctions Device

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Communications in Theoretical Physics 2009年第5期51卷 853-856页

作者： li jing-Hui Faculty of Science P.O. Box 58 Ningbo University Ningbo 315211 China

In the paper, we study a super-conducting junctions device subject to an input periodic signal and a constant force. It is shown that, for this device, we can get current reversals for the current of the electron pairs versus the frequency of the periodic signal and negative conductance for the current of the electron pairs as a function of the constant force.

关键词： current reversal negative conductance Josephson junction

Velocity and Dispersion for a Two-Dimensional Random Walk

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Communications in Theoretical Physics 2009年第10期52卷 627-630页

作者： li jing-Hui Faculty of Science Ningbo University Ningbo 315211 China

In the paper,we consider the transport of a two-dimensional random *** velocity and the dispersionof this two-dimensional random walk are *** mainly show that:(i)by controlling the values of the transition rates,the direction of the random walk can be reversed;(ii)for some suitably selected transition rates,our two-dimensionalrandom walk can be efficient in comparison with the one-dimensional random *** work is motivated in part by thechallenge to explain the unidirectional transport of motor *** the motor proteins move at the turn pointsof their tracks(i.e.,the cytoskeleton filaments and the DNA molecular tubes),some of our results in this paper can beused to deal with the problem.

关键词： random walk motor proteins

Appearance of Spatial-Temporal Noise in Super-conducting Junction and Its Effect on Transport of Electron Pairs

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Communications in Theoretical Physics 2007年第4期47卷 669-671页

作者： li jing-Hui Faculty of Science Ningbo University Ningbo 315211 China

Transport of electron pairs in super-conducting junction with spatial-temporal noise is investigated. We show that the spatial-temporal noise can produce the current of the electron pairs, which stems from a symmetry breaking of the system induced by the correlation of the spatial-temporal noise with the phase difference. It is found that there is a positive current for the electron pairs, exhibiting a peak with increasing the values of some parameters of the noises. The results provide a theoretical foundation for the further investigation of the super-conducting junction.

关键词： super-conducting junction electron pairs spatial-temporal noise

Stochastic Huge-Resonance Caused by Coupling for a Globally Coupled linear System

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Communications in Theoretical Physics 2009年第2期51卷 265-269页

作者： li jing-Hui Faculty of Science Ningbo University P.O. Box 58 Ningbo 315211 China

In the paper, we investigate a globally coupled linear system with finite subunits subject to temporal periodic force and with multiplicative dichotomous noise. It is shown that, the global coupling among the subunits can hugely enhance the phenomenon of SR for the amplitude of the average mean field as the functions of the transition rate of the noise and that as the function of the frequency of the signal respectively.

关键词： stochastic resonance globally coupled linear system dichotomous noise

Flux Induced by Multiplicative Dichotomous Noise

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Communications in Theoretical Physics 2008年第1期49卷 171-173页

作者： li jing-Hui Faculty of Science P.O. Box 58 Ningbo University Ningbo 315211 China

The transport of particles induced by multiplicative dichotomous noise for a system is investigated. The stationary probability current is derived. It is shown that, for the system studied by us, the spatial asymmetry... 详细信息

关键词： transport dichotomous noise flux probability current

Multiplicative Stochastic Resonance for a linear System Driven by O-U Noise

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Communications in Theoretical Physics 2009年第4期51卷 675-678页

作者： li jing-Hui P.O. Box 58 Faculty of Science Ningbo University Ningbo 315211 China

In the paper, we study a linear system driven by O-U noise and give a method which is different from the one stated in Europhys. Lett. 40 （1997） 117. We find the same phenomenon of multiplicative stochastic resonance for the response of the system to the signal as the one found in Europhys. Left. 40 （1997） 117. The merit of our method is that it prevents the complex formulas when making sum from n = 0 to n →∞ as in Europhys. Lett. 40 （1997） 117, which leads to the approximate results of the figures.

关键词： stochastic resonance O-U noise