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相关概念视频

Diffusion01:12

Diffusion

198.2K
Diffusion is the passive movement of substances down their concentration gradients—requiring no expenditure of cellular energy. Substances, such as molecules or ions, diffuse from an area of high concentration to an area of low concentration in the cytosol or across membranes. Eventually, the concentration will even out, with the substance moving randomly but causing no net change in concentration. Such a state is called dynamic equilibrium, which is essential for maintaining overall...
198.2K
Passive Diffusion: Overview and Kinetics01:17

Passive Diffusion: Overview and Kinetics

707
Passive diffusion is a critical process that allows small lipophilic drugs to cross the cell membrane along a concentration gradient. This mechanism's efficiency depends on four primary factors: the membrane's surface area, the drug's lipid-water partition coefficient, the concentration gradient, and the membrane's thickness.
When administered orally, drugs establish a substantial concentration gradient between the gastrointestinal (GI) lumen and the bloodstream, expediting...
707
Design Example: Managing Concrete Workability01:14

Design Example: Managing Concrete Workability

120
This example deals with managing the workability of concrete for a raft foundation project under hot weather conditions. Workability is crucial for ensuring the concrete is easy to place, compact, and finish. In this scenario, a slump test — a common method to measure the workability of fresh concrete — initially indicated low workability. This was attributed to the rapid water loss from the concrete mix, exacerbated by the high temperatures causing the course aggregates to heat up.
120
Physiological Pharmacokinetic Models: Blood Flow-Limited Versus Diffusion-Limited Models00:57

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

140
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...
140
One-Compartment Open Model: Wagner-Nelson and Loo Riegelman Method for ka Estimation01:24

One-Compartment Open Model: Wagner-Nelson and Loo Riegelman Method for ka Estimation

706
This lesson introduces two critical methods in pharmacokinetics, the Wagner-Nelson and Loo-Riegelman methods, used for estimating the absorption rate constant (ka) for drugs administered via non-intravenous routes. The Wagner-Nelson method relates ka to the plasma concentration derived from the slope of a semilog percent unabsorbed time plot. However, it is limited to drugs with one-compartment kinetics and can be impacted by factors like gastrointestinal motility or enzymatic degradation.
On...
706
Assessment of Diffusion and Perfusion01:17

Assessment of Diffusion and Perfusion

1.1K
Understanding and evaluating diffusion and perfusion is critical in assessing a patient's respiratory and circulatory health. These processes play key roles in maintaining the body's internal environment, ensuring that tissues receive adequate oxygen while waste products are efficiently removed.
The Role of Diffusion in Respiration
Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration. In the respiratory system, this...
1.1K

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相关实验视频

Updated: Sep 9, 2025

A Method for Determination and Simulation of Permeability and Diffusion in a 3D Tissue Model in a Membrane Insert System for Multi-well Plates
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A Method for Determination and Simulation of Permeability and Diffusion in a 3D Tissue Model in a Membrane Insert System for Multi-well Plates

Published on: February 23, 2018

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DiffDesign:可控制的扩散与元预先生成高效的室内设计

Tao Geng1, Yuxuan Yang1

  • 1Nanjing Forestry University, Nanjing, China.

PloS one
|September 4, 2025
PubMed
概括
此摘要是机器生成的。

这项研究介绍了DiffDesign,一个用于室内设计的新型生成性AI模型. DiffDesign有效地从文本中创建真实的室内设计,解决可控性和实际应用的先前限制.

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Single-Molecule Tracking Microscopy - A Tool for Determining the Diffusive States of Cytosolic Molecules
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Generating Controlled, Dynamic Chemical Landscapes to Study Microbial Behavior
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相关实验视频

Last Updated: Sep 9, 2025

A Method for Determination and Simulation of Permeability and Diffusion in a 3D Tissue Model in a Membrane Insert System for Multi-well Plates
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A Method for Determination and Simulation of Permeability and Diffusion in a 3D Tissue Model in a Membrane Insert System for Multi-well Plates

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Single-Molecule Tracking Microscopy - A Tool for Determining the Diffusive States of Cytosolic Molecules
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Single-Molecule Tracking Microscopy - A Tool for Determining the Diffusive States of Cytosolic Molecules

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Generating Controlled, Dynamic Chemical Landscapes to Study Microbial Behavior
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Generating Controlled, Dynamic Chemical Landscapes to Study Microbial Behavior

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科学领域:

  • 人工智能
  • 计算机视觉
  • 计算设计

背景情况:

  • 室内设计是复杂的,需要平衡美学,功能和人体工程学.
  • 目前的生成模型对室内设计任务缺乏控制和实际相关性.
  • 现有的方法在尺寸,空间范围和生成质量方面存在困难.

研究的目的:

  • 开发一个高效可控的室内设计模型.
  • 解决室内设计现有创新方法的局限性.
  • 提高人工智能在室内设计中的实用性.

主要方法:

  • 提出了DifDesign,一个可控制的扩散模型,利用元先验.
  • 使用预训练的二维扩散模型作为染骨干.
  • 实现设计属性 (外观,姿势,尺寸) 的交叉注意力控制和视图一致性的调整模块.
  • 构建了DesignHelper数据集 (400个以上的解决方案,15个以上的空间类型,15个以上的样式) 进行微调.

主要成果:

  • DiffDesign展示了有效和强大的室内设计.
  • 该模型显示了设计属性的可控性.
  • 在生成的设计中确保视图的一致性.
  • 通过对基准数据集进行广泛的实验验证.

结论:

  • DiffDesign为人工智能驱动的室内设计提供了一个有效的解决方案.
  • 可控制的发电能力提高了实际使用性.
  • 开发的数据集和模型推进了计算式室内设计领域.