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相关概念视频

Short-distance Transport of Resources02:12

Short-distance Transport of Resources

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Short-distance transport refers to transport that occurs over a distance of just 2-3 cells, crossing the plasma membrane in the process. Small uncharged molecules, such as oxygen, carbon dioxide, and water, can diffuse across the plasma membrane on their own. In contrast, ions and larger molecules require the assistance of transport proteins due to their charge or size. Transport across membranes also occurs within individual cells, playing a variety of essential roles for the plant as a whole.
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Behavior of Gas Molecules: Molecular Diffusion, Mean Free Path, and Effusion03:48

Behavior of Gas Molecules: Molecular Diffusion, Mean Free Path, and Effusion

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Although gaseous molecules travel at tremendous speeds (hundreds of meters per second), they collide with other gaseous molecules and travel in many different directions before reaching the desired target. At room temperature, a gaseous molecule will experience billions of collisions per second. The mean free path is the average distance a molecule travels between collisions. The mean free path increases with decreasing pressure; in general, the mean free path for a gaseous molecule will be...
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Mean free path and Mean free time01:22

Mean free path and Mean free time

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Consider the gas molecules in a cylinder. They move in a random motion as they collide with each other and change speed and direction. The average of all the path lengths between collisions is known as the "mean free path."
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Fast Decoupled and DC Powerflow01:24

Fast Decoupled and DC Powerflow

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The fast decoupled power flow method addresses contingencies in power system operations, such as generator outages or transmission line failures. This method provides quick power flow solutions, essential for real-time system adjustments. Fast decoupled power flow algorithms simplify the Jacobian matrix by neglecting certain elements, leading to two sets of decoupled equations:
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Physiological Pharmacokinetic Models: Blood Flow-Limited Versus Diffusion-Limited Models00:57

Physiological Pharmacokinetic Models: Blood Flow-Limited Versus Diffusion-Limited Models

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Physiological pharmacokinetic models, often called flow-limited or perfusion models, typically assume a swift drug distribution between tissue and venous blood, creating a rapid drug equilibrium. This premise is based on the idea that drug diffusion is extremely fast, and the cell membrane presents no barrier to drug permeation. In this scenario, where no drug binding occurs, the drug concentration in the tissue equals that of the venous blood leaving the tissue. This greatly simplifies the...
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Capillarity in Fluid01:19

Capillarity in Fluid

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Capillarity describes the movement of liquid in small spaces without external forces acting on it. The capillarity is driven by surface tension and adhesive interactions between the liquid and surrounding solid surfaces. This effect is often seen in narrow tubes, porous materials, and fine particles.
Surface tension is crucial to capillarity. It results from cohesive forces between liquid molecules at the liquid-air boundary, forming a skin that resists external forces. When the capillary tube...
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相关实验视频

Updated: May 5, 2026

Reservoir Condition Pore-scale Imaging of Multiple Fluid Phases Using X-ray Microtomography
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在无尺度网络上,最短路径的透.

Minsuk Kim1, Lorenzo Cirigliano2, Claudio Castellano3

  • 1Indiana University, Bloomington, Center for Complex Networks and Systems Research, Luddy School of Informatics, Computing, and Engineering, Indiana 47408, USA.

Physical review. E
|February 20, 2026
PubMed
概括
此摘要是机器生成的。

在无尺度网络上的最短路径透模型显示了独立于度指数的过渡,类似于埃尔多斯-雷尼网络. 这是因为这个过程在过渡之前使网络结构均化.

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科学领域:

  • 网络科学 网络科学
  • 统计物理学的统计物理.
  • 复杂的系统复杂的系统.

背景情况:

  • 最短路径透 (SPP) 模型模拟了资源消耗和网络崩.
  • 在Erdős-Rényi网络 (ERN) 上的SPP在有限的预算中显示出普通债券透的普遍性,但在无限的预算中变得更加突如其来的.

研究的目的:

  • 在随机无尺度网络 (SFN) 上调查 SPP 过渡.
  • 与ERN相比,确定SFN是否表现出不同的透行为.

主要方法:

  • 大规模的数值模拟.
  • 有限尺寸缩放分析. 有限尺寸缩放分析.
  • 在随机无尺度网络上研究了SPP,具有权力法度分布.

主要成果:

  • 在SFN上的SPP过渡与在ERN上的SPP过渡相同,不管是多少度指数.
  • 该研究区分了有限预算和无限预算的SPP通用性类别.
  • 在SPP过程中,在过渡之前,SFN的异质结构得到了同质化.

结论:

  • SFN的异质性不会影响SPP过渡的普遍性类.
  • SPP模型提供了对跨不同网络拓的网络过渡的统一理解.