arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1402.3933cond-mat.stat-mech
收藏

跳跃长度依赖于等待时间的有向连续时间随机游动模型

A Directed Continuous Time Random Walk Model with Jump Length Depending on Waiting Time

Long Shi, Zuguo Yu, Zhi Mao, Aiguo Xiao

摘要:

在一维连续空间中,提出了一个耦合的有向连续时间随机行走模型,其中随机行走者向一个方向跳跃,跳跃之间的等待时间影响随后的跳跃.在所提出的模型中,在时间$t$在位置$x$处找到步行者的概率密度函数$P(x,t)$的拉普拉斯-拉普拉斯变换完全由等待时间的概率密度函数$φ(t)$的拉普拉斯变换确定。根据等待时间在拉普拉斯域中的概率密度函数,导出了随机过程的极限分布和相应的演化方程。

英文摘要:

In continuum one-dimensional space, a coupled directed continuous time random walk model is proposed, where the random walker jumps toward one direction and the waiting time between jumps affects the subsequent jump. In the proposed model, the Laplace-Laplace transform of the probability density function $P(x,t)$ of finding the walker at position $x$ at time $t$ is completely determined by the Laplace transform of the probability density function $φ(t)$ of the waiting time. In terms of the probability density function of the waiting time in the Laplace domain, the limit distribution of the random process and the corresponding evolving equations are derived.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑