Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Leaky Scanning02:28

Leaky Scanning

5.2K
During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA.  Marilyn Kozak discovered that the sequence RCCAUGG (where R...
5.2K
Areas Within Irregular Boundaries01:26

Areas Within Irregular Boundaries

120
Calculating areas within irregular boundaries, such as along rivers or curved roads, is crucial in various fields, including surveying, engineering, and environmental management. Surveyors often begin by creating a traverse, a connected series of straight lines approximating the area's boundary. The coordinates of each traverse point are essential for calculating the enclosed area. The double meridian distance formula is a widely used technique for this purpose. This method utilizes the...
120
Woodward–Hoffmann Selection Rules and Microscopic Reversibility01:34

Woodward–Hoffmann Selection Rules and Microscopic Reversibility

3.3K
Electrocyclic reactions, cycloadditions, and sigmatropic rearrangements are concerted pericyclic reactions that proceed via a cyclic transition state. These reactions are stereospecific and regioselective. The stereochemistry of the products depends on the symmetry characteristics of the interacting orbitals and the reaction conditions. Accordingly, pericyclic reactions are classified as either symmetry-allowed or symmetry-forbidden. Woodward and Hoffmann presented the selection criteria for...
3.3K
Random Sampling Method01:09

Random Sampling Method

12.4K
Sampling is a technique to select a portion (or subset) of the larger population and study that portion (the sample) to gain information about the population. Data are the result of sampling from a population. The sampling method ensures that samples are drawn without bias and accurately represent the population. Because measuring the entire population in a study is not practical, researchers use samples to represent the population of interest. Among the various sampling methods used by...
12.4K
Atomic Nuclei: Nuclear Relaxation Processes01:23

Atomic Nuclei: Nuclear Relaxation Processes

724
In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis,  the precessing magnetic moments are randomly oriented around the z-axis.
724
Detection of Black Holes01:10

Detection of Black Holes

2.3K
Although black holes were theoretically postulated in the 1920s, they remained outside the domain of observational astronomy until the 1970s.
Their closest cousins are neutron stars, which are composed almost entirely of neutrons packed against each other, making them extremely dense. A neutron star has the same mass as the Sun but its diameter is only a few kilometers. Therefore, the escape velocity from their surface is close to the speed of light.
Not until the 1960s, when the first neutron...
2.3K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Power-law behavior around bifurcation points of 1D maps: A supertracks approach.

Chaos (Woodbury, N.Y.)·2025
Same author

Basic Cells Special Features and Their Influence on Global Transport Properties of Long Periodic Structures.

Entropy (Basel, Switzerland)·2024
Same author

Replica symmetry breaking in 1D Rayleigh scattering system: theory and validations.

Light, science & applications·2024
Same author

Correlations in the EPR State Observables.

Entropy (Basel, Switzerland)·2024
Same author

Observation of the photonic Hall effect and photonic magnetoresistance in random lasers.

Nature communications·2024
Same author

Lattice thermal conductivity of 2D nanomaterials: a simple semi-empirical approach.

Physical chemistry chemical physics : PCCP·2023
Same journal

Research on a Regional Availability Evaluation Model for Road-Area High-Entropy Energy Based on Synergy Factors.

Entropy (Basel, Switzerland)·2026
Same journal

Atmospheric Turbulence Channel Modeling and Performance Analysis of a CO-ZP-OFDM Coherent Optical Communication System for UAV Air-to-Ground Scenarios.

Entropy (Basel, Switzerland)·2026
Same journal

Information Geometry and Asymptotic Theory for SMML Estimators.

Entropy (Basel, Switzerland)·2026
Same journal

Correlation Entropy and Power-Law Kinetics.

Entropy (Basel, Switzerland)·2026
Same journal

Research on the Contagion of Systemic Financial Risk Under the Impact of Climate Risks-From the Perspective of Complex Networks and Machine Learning.

Entropy (Basel, Switzerland)·2026
Same journal

The Statistical-Mechanical Meaning of the Wave Function of Quantum Mechanics.

Entropy (Basel, Switzerland)·2026
查看所有相关文章

相关实验视频

Updated: Sep 13, 2025

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
11:51

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions

Published on: February 22, 2018

8.8K

随机搜索 走在里面 吸收 Annuli

Anderson S Bibiano-Filho1, Jandson F O de Freitas2, Marcos G E da Luz3

  • 1Laboratório de Física Teórica e Computacional, Departamento de Física, Universidade Federal de Pernambuco, Recife 50670-901, PE, Brazil.

Entropy (Basel, Switzerland)
|July 29, 2025
PubMed
概括
此摘要是机器生成的。

这项研究分析了2D空间中的随机搜索步行,使用权力定律步骤分布. 研究人员得出了搜索效率公式,并探索了吸收概率,为2D搜索策略提供了洞察力.

关键词:
莱维可以走路.搜寻食物的物理原理随机搜索 随机搜索 随机搜索

更多相关视频

Fourier-Based Diffraction Analysis of Live Caenorhabditis elegans
08:24

Fourier-Based Diffraction Analysis of Live Caenorhabditis elegans

Published on: September 13, 2017

8.0K
Observation and Analysis of Blinking Surface-enhanced Raman Scattering
05:52

Observation and Analysis of Blinking Surface-enhanced Raman Scattering

Published on: January 11, 2018

7.5K

相关实验视频

Last Updated: Sep 13, 2025

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
11:51

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions

Published on: February 22, 2018

8.8K
Fourier-Based Diffraction Analysis of Live Caenorhabditis elegans
08:24

Fourier-Based Diffraction Analysis of Live Caenorhabditis elegans

Published on: September 13, 2017

8.0K
Observation and Analysis of Blinking Surface-enhanced Raman Scattering
05:52

Observation and Analysis of Blinking Surface-enhanced Raman Scattering

Published on: January 11, 2018

7.5K

科学领域:

  • 物理 物理学 物理
  • 应用数学 应用数学 应用数学
  • 统计力学 统计力学

背景情况:

  • 随机搜索步行对于理解扩散和运输现象至关重要.
  • 对于各种应用来说,搜索者在具有吸收边界的狭窄空间中的行为至关重要.
  • 现有的模型往往简化了阶段分布,限制了它们对复杂的搜索场景的适用性.

研究的目的:

  • 为了研究随机搜索,步行在两维 (2D) 空间中,被同心吸收的环形环形环形环形环形环形环形环形环形环形环形环形环形环形环形环形环形环形环形环形环形环形环形环形环形.
  • 通过权力定律阶段分布来导出搜索效率 (η) 的分析和近似表达式.
  • 在搜索动态中分析吸收概率和香农.

主要方法:

  • 在弹道极限中搜索效率 (η) 的分析推导.
  • 对于远离边界开始的搜索,n 值的近似值.
  • 吸收概率和香农的数值分析.
  • 对内部环的小初始距离进行缩放行为的调查.

主要成果:

  • 在弹道极限内,搜索效率 (η) 的确切分析结果.
  • 在远场状态下为 η 的近似表达式.
  • 数字结果与理论发现有很好的一致性.
  • 对等概率和最大的权力定律指数随着起始距离以对数方式增长.

结论:

  • 这项研究提供了一个全面的理论和数值分析随机搜索步行与2D环形域中的权力定律步骤分布.
  • 这些发现为搜索效率和边界相互作用动态提供了宝贵的见解.
  • 这项工作是复杂的2D搜索问题的平均场方法,具有重要的现实应用.