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Resonant Activation Induced by Four-Value Noise

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Communications in Theoretical Physics 2008年第2期49卷 385-390页

作者： han yin-xia LI Jing-Hui P.O. Box 58 Faculty of Science Ningbo University Ningbo 315211 China

The phenomenon of the resonant activation （RA） of a particle over a fluctuating potential barrier with a four-value noise is investigated. It is shown that the mean first passage time （MFPT） displays six minima as the function of the transition rates γ1, γ2, γ3, γ4, γ5, and 76 of the four-value noise, respectively. In addition, the effect of other parameters of the system, such as the noise strength D of the additive Gaussian white noise and the parameter value a, b, c, and d of the four-value noise, on the RAs is also investigated.

关键词： resonant activation four-value noise mean first passage time

Stochastic Resonance Induced by Dichotomous Resistor in an Electric Circuit

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Communications in Theoretical Physics 2007年第3期47卷 487-490页

作者： LI Jing-Hui han yin-xia Faculty of Science Ningbo University Ningbo 315211 China

Abstract An electric circuit with dichotomous resistor is investigated. It is shown that the amplitude of the average electric current washing the resistor represents the phenomenon of stochastic resonance, which is t... 详细信息

关键词： stochastic resona.nce dichotomous noise electric current

Transport of Electron Pairs in a Superconducting Junction Device： Underdamped Case

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Communications in Theoretical Physics 2006年第6期45卷 1031-1034页

作者： LI Jing-Hui han yin-xia Faculty of Science Ningbo University Ningbo 315211 China

Transport of electron pairs in a superconducting junction device in the underdamped case is investigated. It is shown that the capacitance of the junctions can slow the movement of the electron pairs and reduce the net voltage. It is also shown that, for the underdamped case and the overdamped case, the movement of the electron pairs in this superconducting junctions device has some similar features. By controlling the correlation between the additive and multiplicative noise, the flux can be reversed. In addition, if the additive noise strength （or the temperature T） is large enough, a reversal can also be induced.

关键词： superconducting junction electron pairs noise

Giant-Resonance for a Four-Dimensionally Coupled System with Dichotomous Noise

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Communications in Theoretical Physics 2007年第4期47卷 672-674页

作者： LI Jing-Hui han yin-xia Faculty of Science Ningbo University Ningbo 315211 China

In this paper, we investigate a four-dimensionally coupled system driven by dichotomous noise. A new kind of stochastic resonance is found, for which the response of the system to the input signal can be hugely intens... 详细信息

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

Mean First Passage Time for System with Fluctuating Potential Barrier and Coupled Noise

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Communications in Theoretical Physics 2007年第3期47卷 517-519页

作者： LI Jing-Hui han yin-xia Faculty of Science Ningbo University Ningbo 315211 China

In this paper we study the mean first passage time （MFPT） over a fluctuation potential barrier driven by a coupled noise. It is shown that the MFPT over the fluctuation potential barrier displays resonant activations as the function of the flipping rate of the fluctuation potential barrier, and as the function of the dichotomous noise transition rate.

关键词： mean fist passage time resonant activation coupled noise

Net Voltage and Phenomenon of Resonance Induced by Chaotic Signal for a Superconducting Junctions Device

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Communications in Theoretical Physics 2006年第4X期46卷 647-650页

作者： LI Jing-Hui han yin-xia Department of Physics Ningbo University Ningbo 315211 China

The effects of a quenched chaotic signal on the over-damped motion of the electron pairs of a superconducting junctions device are studied. It is shown that the chaotic signal can induce the net voltage and the phenom... 详细信息

关键词： superconducting junction electron pairs noise

Resonance, Multi-resonance, and Reverse-resonance Induced by Multiplicative Dichotomous Noise

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Communications in Theoretical Physics 2007年第4X期48卷 605-609页

作者： LI Jing-Hui han yin-xia Faculty of Science Ningbo University Ningbo 315211 China

A constant-potential system driven by multiplicative dichotomous noise and subject to an input oscillatory signal is investigated. Two phenomena of stochastic resonance are observed. One is the response as a function of the noise＇s parameters; the other is that as a function of the input signal frequency. A phenomenon of multi-resonance （there are three or four peaks） is found for the response as a function of a parameter of the noise. A phenomenon of reverse-resonance is found, for which the response of the system to the signal can be weakened by the presence of the noise （there is an optimal minimum）. These results help in studies of the systems with multiplicative dichotomous noise, such as the semiconductor, the proteins motor, the chemical reaction, and so on.

关键词： stochastic resonance dichotomous noise

Effect of Asymmetric Potential and Gaussian Colored Noise on Stochastic Resonance

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Communications in Theoretical Physics 2005年第2X期44卷 226-230页

作者： han yin-xia LI Jing-Hui CHEN Shi-Gang Graduate School of China Academy of Engineering Physics P.O. Box 2101 Beijing 100088 China CCAST (World Laboratory) P.O. Box 8730 Beijing 100088 China Center for Nonlinear Studies Institute of Applied Physics and Computational Mathematics P.O. Box 8009(28) Beijing 100088 China

The phenomenon of stochastic resonance （SR） in a bistable nonlinear system is studied when the system is driven by the asymmetric potential and additive Gaussian colored noise. Using the unified colored noise approximation method, the additive Gaussian colored noise can be simplified to additive Gaussian white noise. The signal-to-noise ratio （SNR） is calculated according to the generalized two-state theory （shown in [H.S. Wio and S. Bouzat, Brazilian ***. 29 （1999） 136]）. We find that the SNR increases with the proximity of a to zero. In addition, the correlation time T between the additive Gaussian colored noise is also an ingredient to improve SR. The shorter the correlation time T between the Gaussian additive colored noise is, the higher of the peak value of SNR.

关键词： additive Gaussian colored noise stochastic resonance signal-to noise ratio

A robust statistical prediction model for late-summer heavy precipitation days in North China

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Science China Earth Sciences 2025年第1期68卷 158-171页

作者： Shunli JIANG Tingting han Xin ZHOU Huijun WANG Zhicong yin xiaolei SONG Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Key Laboratory of Meteorological Disaster Ministry of Education Nanjing University for Information Science and Technology Nansen-Zhu International Research Centre Institute of Atmospheric Physics Chinese Academy of Sciences Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)

Recently, heavy precipitation(HP) events have occurred frequently in North China(NC), causing devastating economic losses and human fatalities. However, the short-term climate prediction of HP is quite limited. Combining year-to-year increment(DY) method and sliding correlations, we developed a robust seasonal prediction model for late-summer HP days(HPDs) in NC during 1982–2022, utilizing three independent predictors—February sea surface temperature(SST) in the Indian Ocean(SST＿IO), February snow depth over North Asia(SDE＿NA), and May melted snow depth in NC(MSDE＿NC). The SST＿IO anomalies affect NC's precipitation through the Pacific-Japan pattern. The SDE＿NA anomalies are associated with East Asian anomalous anticyclone by southeastern propagation of Rossby wave at Eurasia. The MSDE＿NC anomalies are followed by vertical motion and moisture anomalies in situ and thereby cause precipitation anomalies. This prediction model can well simulate the variations of the HPDs, with a correlation coefficient(CC) of 0.81(0.65) between the observed and predicted HPDs＿DY(HPDs＿anomaly). The percentage with the same sign for 15 extreme HPDs＿anomaly years(PSSE) is 100%.Moreover, in the cross-validation test during 1982–2022, the PSSE for HPDs＿anomaly is as high as 100%, along with a low rootmean-square error of 1.14. For independent hindcasts during 2013–2022, the CC between the observed and predicted HPDs＿DY(HPDs＿anomaly) is 0.93(0.83), together with high Nash-Sutcliffe efficiency(0.82) and agreement index(0.89). Specifically, the predictions are broadly consistent with the observations for 2015, 2016, 2017, 2021, and 2022, reflecting excellent performance of this prediction model of HPDs in NC.

关键词： Heavy precipitation at North China Year-to-year increment approach Robust seasonal prediction Sea surface temperature Snow depth

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