| 双稳系统的随机能量共振和作功效率 |
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| 引用本文： | 林敏,张美丽,黄咏梅.双稳系统的随机能量共振和作功效率[J].物理学报,2011,60(8):80509-080509. |
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| 作者姓名： | 林敏 张美丽 黄咏梅 |
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| 作者单位： | 中国计量学院计量测试工程学院,杭州 310018 |
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| 基金项目： | 国家自然科学基金(批准号:10972207)和浙江省自然科学基金(批准号:Y7080111)资助的课题. |
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| 摘 要： | 分析了处于双稳系统中的布朗粒子与外界的周期性外力和热随机力的功、热交互作用,建立了基于Langevin方程的随机能量平衡方程.围绕着受周期力、随机力和阻尼力共同作用的Langevin方程,采用动力学和非平衡热力学相结合的方法,从以"力"为立足点转到以"能量"为研究核心,深入分析了布朗粒子沿单一轨线运动时系统与环境之间的能量交换和作功效率,揭示了双稳系统的随机能量共振现象.
关键词：
双稳系统
随机能量共振
作功效率
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| 关 键 词： | 双稳系统 随机能量共振 作功效率 |
| 收稿时间： | 2010-09-26 |
The stochastic energetics resonance of bistable systems and efficiency of doing work |
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| Lin Min,Zhang Mei-Li and Huang Yong-Mei.The stochastic energetics resonance of bistable systems and efficiency of doing work[J].Acta Physica Sinica,2011,60(8):80509-080509. |
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| Authors: | Lin Min Zhang Mei-Li and Huang Yong-Mei |
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| Institution: | College of Metrology Technology and Engineering, China Jiliang University, Hangzhou 310018, China;College of Metrology Technology and Engineering, China Jiliang University, Hangzhou 310018, China;College of Metrology Technology and Engineering, China Jiliang University, Hangzhou 310018, China |
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| Abstract: | The interaction of work and heat between Brownian particles in a bistable system, the external periodic force and the thermal stochastic force are analyzed. The stochastic energy balance equation based on Langevin equation is established. For the Langevin equation subjected to periodic force, stochastic force and damping force, the method of combining dynamics and non-equilibrium thermodynamics is used. From force as the foothold changed into energy as the research core, the exchange of energy between system and environment and the efficiency of doing work are deeply analyzed with this method when the Brownian particle motion is along single trajectories, which reveals that the bistable system exhibits stochastic energetic resonance phenomenon. |
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| Keywords: | bistable systems stochastic energetics resonance efficiency of doning work |
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