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相关概念视频

Three-Compartment Open Model01:06

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The three-compartment open model is a pharmacokinetic model used to describe the distribution and elimination of drugs following extravascular administration. It comprises a central compartment representing the plasma and two peripheral compartments. The highly perfused peripheral compartment represents organs and tissues with a rich blood supply, such as the liver, kidneys, and lungs. The scarcely perfused peripheral compartment represents tissues with lower blood supply, such as adipose...
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Convolution: Math, Graphics, and Discrete Signals01:24

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In any LTI (Linear Time-Invariant) system, the convolution of two signals is denoted using a convolution operator, assuming all initial conditions are zero. The convolution integral can be divided into two parts: the zero-input or natural response and the zero-state or forced response, with t0 indicating the initial time.
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Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next...
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Compartment Models: Single-Compartment Model01:14

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The single-compartment model serves as a simplified representation of the human body. This model assumes that the body functions as a single, well-mixed open compartment. When a drug is administered intravenously, it enters the body and quickly distributes uniformly. The drug then undergoes biotransformation and elimination, ultimately leaving the body. The volume of this compartment is referred to as the apparent volume of distribution into which the drug can uniformly distribute. In this...
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Consider a single-phase, two-wire, lossless transmission line terminated by an impedance at the receiving end and a source with Thevenin voltage and impedance at the sending end. The line, with length, has a surge impedance and wave velocity determined by the line's inductance and capacitance.
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The two-compartment model divides the body into central and peripheral compartments to account for varying blood perfusion rates among organs and tissues, affecting drug distribution. The central compartment includes blood and highly perfused tissues with rapid drug distribution, while the peripheral compartment contains tissues with slower drug distribution. After a single IV bolus dose, the drug concentration is high in plasma and low in tissues. The drug distribution between compartments...
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一半厚度的离散格式,用于模拟可压缩延迟间隔床.

Shangqi Han1,2, Chuiyu Lu3,4, Wen Lu1,2

  • 1State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China.

Scientific reports
|August 11, 2025
PubMed
概括
此摘要是机器生成的。

这项研究引入了一种新的半厚分离方法,用于在地下水模型中模拟可压缩的间床. 这种高效的方法显著减少了计算时间和内存使用量,同时保持了土地沉降建模的高精度.

关键词:
这是一个CSUB包.可压缩的延迟床间时间.半厚度离散格式的离散格式地压变化的原理沉降模拟 沉降模拟

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科学领域:

  • 地质科学 地质科学
  • 水文地质学 水文地质学
  • 计算机建模 计算建模

背景情况:

  • 地面沉降模型依赖于模拟可压缩的间床.
  • 现有的MODFLOW模块 (SUB和CSUB) 使用不同的方法 (头部变化与地压变化) 来进行此模拟.
  • 虽然CSUB的地压变化方法对未受限制的含水层更准确,但由于全厚分离,它需要加倍的计算资源.

研究的目的:

  • 开发一个更有效的模拟方法,用于可压缩延迟介面.
  • 为了提高计算效率和降低基于地压力的交床模拟的内存需求.
  • 为了验证一个拟议的半厚度离散格式,用于地压变化.

主要方法:

  • 提出了一种基于可压缩间床的地压力线性分布的半厚离散格式.
  • 通过三个具有不同参数的测试案例 (分离单位,交叉厚度,头部,液压导电) 验证了该方法.
  • 将拟议的方法与CSUB模块的全厚离散方法进行比较,分析计算时间和内存使用情况.

主要成果:

  • 拟议的半厚度方法实现了高精度,与CSUB模块相比,交床水释放差异小于0.4%.
  • 显著的计算优势:减少了46.23%的计算时间和13.64%的内存使用量.
  • 该方法利用线性地压分布来提高效率.

结论:

  • 在地压变化下,拟议的半厚离散格式在地压变化下提供了一个高度准确和计算效率高的替代方案.
  • 这种方法显著提高了模拟效率,并降低了模拟可压缩间床的内存需求.
  • 为大规模,高精度的土地沉降建模提供了可行的技术方法.