摘要
从分子马达输运特点和实验现象出发,建立满足朗之万方程的冲击力模型,分析分子马达定向输运的动力学行为.研究发现:在合适的冲击力和噪声强度的共同作用下,分子马达可以稳定的梯跳跃迁运动和有效的输运;分子马达在轨运动的方向由冲击力的方向决定;另外,虽然在不同的噪声强度时平均速度都不为零,但是整个分子马达系综的高效输运对噪声强度有一定的选择性;系综的平均速度随着负载力的增大而减小,甚至会产生反方向的运动.
With transport characteristics and experiment about molecular motor, an impact force model is established, which conforms Langevin equation. Kinetics of molecular motor transport is analyzed. Molecular motors could take stable stepping motion and effective transport in right impact force combined with noise intensity. Direction of motion of molecular motor is adjusted by direction of impulse force. Though average speed is not zero at different noise intensity, efficient transport of molecular motor ensemble indicates that the system is selective on noise intensity. Average speed of molecular motor ensemble decreases with increasing of load force, the motion even changes its direction as load force is great enough.
出处
《计算物理》
CSCD
北大核心
2013年第4期565-570,共6页
Chinese Journal of Computational Physics
基金
河北省教育厅高等学校科学技术研究(Z2012175)
张家口市科学技术研究(1101006B)资助项目
关键词
分子马达
冲击力
朗之万方程
噪声强度
molecular motor
impact force
langevin equation
noise intensity
