• 文献检索
  • 文档翻译
  • 深度研究
  • 学术资讯
  • Suppr Zotero 插件Zotero 插件
  • 邀请有礼
  • 套餐&价格
  • 历史记录
应用&插件
Suppr Zotero 插件Zotero 插件浏览器插件Mac 客户端Windows 客户端微信小程序
定价
高级版会员购买积分包购买API积分包
服务
文献检索文档翻译深度研究API 文档MCP 服务
关于我们
关于 Suppr公司介绍联系我们用户协议隐私条款
关注我们

Suppr 超能文献

核心技术专利:CN118964589B侵权必究
粤ICP备2023148730 号-1Suppr @ 2026

文献检索

告别复杂PubMed语法,用中文像聊天一样搜索,搜遍4000万医学文献。AI智能推荐,让科研检索更轻松。

立即免费搜索

文件翻译

保留排版,准确专业,支持PDF/Word/PPT等文件格式,支持 12+语言互译。

免费翻译文档

深度研究

AI帮你快速写综述,25分钟生成高质量综述,智能提取关键信息,辅助科研写作。

立即免费体验

通过重置优化莱维飞行的跨越长度。

Optimizing leapover lengths of Lévy flights with resetting.

作者信息

Radice Mattia, Cristadoro Giampaolo

机构信息

<a href="https://ror.org/01bf9rw71">Max Planck Institute for the Physics of Complex Systems</a>, 01187 Dresden, Germany.

Dipartimento di Matematica e Applicazioni, <a href="https://ror.org/01ynf4891">Università degli Studi Milano-Bicocca</a>, 20126 Milan, Italy.

出版信息

Phys Rev E. 2024 Aug;110(2):L022103. doi: 10.1103/PhysRevE.110.L022103.

DOI:10.1103/PhysRevE.110.L022103
PMID:39295047
Abstract

We consider a one-dimensional search process under stochastic resetting conditions. A target is located at b≥0 and a searcher, starting from the origin, performs a discrete-time random walk with independent jumps drawn from a heavy-tailed distribution. Before each jump, there is a given probability r of restarting the walk from the initial position. The efficiency of a "myopic search"-in which the search stops upon crossing the target for the first time-is usually characterized in terms of the first-passage time τ. On the other hand, great relevance is encapsulated by the leapover length l=x_{τ}-b, which measures how far from the target the search ends. For symmetric heavy-tailed jump distributions, in the absence of resetting the average leapover is always infinite. Here we show instead that resetting induces a finite average leapover ℓ_{b}(r) if the mean jump length is finite. We compute exactly ℓ_{b}(r) and determine the condition under which resetting allows for nontrivial optimization, i.e., for the existence of r^{} such that ℓ_{b}(r^{}) is minimal and smaller than the average leapover of the single jump.

摘要

我们考虑在随机重置条件下的一维搜索过程。目标位于(b\geq0)处,搜索者从原点出发,进行离散时间随机游走,其独立跳跃服从重尾分布。在每次跳跃之前,有给定的概率(r)从初始位置重新开始游走。“近视搜索”(即首次越过目标时搜索停止)的效率通常用首次通过时间(\tau)来表征。另一方面,跨越长度(l = x_{\tau}-b)具有重要意义,它衡量搜索结束时距离目标有多远。对于对称重尾跳跃分布,在没有重置的情况下,平均跨越总是无穷大。相反,我们在此表明,如果平均跳跃长度有限,重置会导致有限的平均跨越(\ell_{b}(r))。我们精确计算(\ell_{b}(r)),并确定重置允许进行非平凡优化的条件,即存在(r^{})使得(\ell_{b}(r^{}))最小且小于单次跳跃的平均跨越。

相似文献

1
Optimizing leapover lengths of Lévy flights with resetting.通过重置优化莱维飞行的跨越长度。
Phys Rev E. 2024 Aug;110(2):L022103. doi: 10.1103/PhysRevE.110.L022103.
2
First Order Transition for the Optimal Search Time of Lévy Flights with Resetting.具有重置的 Lévy 飞行最优搜索时间的一阶转变
Phys Rev Lett. 2014 Nov 28;113(22):220602. doi: 10.1103/PhysRevLett.113.220602. Epub 2014 Nov 26.
3
Lévy flights and Lévy walks under stochastic resetting.随机重置下的 Lévy 飞行和 Lévy 游走。
Phys Rev E. 2024 Apr;109(4-1):044147. doi: 10.1103/PhysRevE.109.044147.
4
Leapover lengths and first passage time statistics for Lévy flights.
Phys Rev Lett. 2007 Oct 19;99(16):160602. doi: 10.1103/PhysRevLett.99.160602.
5
Characterization of stationary states in random walks with stochastic resetting.具有随机重置的随机游走中的定态特征。
Phys Rev E. 2016 Feb;93(2):022106. doi: 10.1103/PhysRevE.93.022106. Epub 2016 Feb 2.
6
First-passage time of a Brownian searcher with stochastic resetting to random positions.具有随机重置到随机位置的布朗搜索者的首次通过时间。
Phys Rev E. 2024 Apr;109(4-1):044134. doi: 10.1103/PhysRevE.109.044134.
7
Optimal first-arrival times in Lévy flights with resetting.具有重置的 Lévy 飞行中的最优首次到达时间。
Phys Rev E Stat Nonlin Soft Matter Phys. 2015 Nov;92(5):052127. doi: 10.1103/PhysRevE.92.052127. Epub 2015 Nov 19.
8
Universal distribution of the number of minima for random walks and Lévy flights.随机游走和 Lévy 飞行中最小值数量的普遍分布。
Phys Rev E. 2024 Aug;110(2-1):024137. doi: 10.1103/PhysRevE.110.024137.
9
Diffusive transport on networks with stochastic resetting to multiple nodes.具有随机重置到多个节点的网络上的扩散传输。
Phys Rev E. 2021 Jun;103(6-1):062126. doi: 10.1103/PhysRevE.103.062126.
10
Effects of mortality on stochastic search processes with resetting.重置随机搜索过程中死亡率的影响。
Phys Rev E. 2023 Feb;107(2-1):024136. doi: 10.1103/PhysRevE.107.024136.

引用本文的文献

1
Brown and Levy Steady-State Motions.布朗和利维稳态运动。
Entropy (Basel). 2025 Jun 16;27(6):643. doi: 10.3390/e27060643.
2
Levy Noise Affects Ornstein-Uhlenbeck Memory.莱维噪声影响奥恩斯坦-乌伦贝克记忆。
Entropy (Basel). 2025 Feb 2;27(2):157. doi: 10.3390/e27020157.