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相关概念视频

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Individual molecules in a gas move in random directions, but a gas containing numerous molecules has a predictable distribution of molecular speeds, which is known as the Maxwell-Boltzmann distribution, f(v).
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Mechanistic models play a crucial role in algorithms for numerical problem-solving, particularly in nonlinear mixed effects modeling (NMEM). These models aim to minimize specific objective functions by evaluating various parameter estimates, leading to the development of systematic algorithms. In some cases, linearization techniques approximate the model using linear equations.
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相关实验视频

Updated: Jul 28, 2025

Simulating Temperature in a Soil Incubation Experiment
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分布式数学模型用于模拟垃圾填埋场的温度概况.

Anjali Bhagwat1, Chandra Shekhar Prasad Ojha2

  • 1Hydrological Investigation Division, National Institute of Hydrology, Roorkee, Uttarakhand, India; Department of Civil Engineering, Indian Institute of Technology, Roorkee, Uttarakhand, India.

Waste management (New York, N.Y.)
|May 28, 2023
PubMed
概括
此摘要是机器生成的。

一个新的数值模型准确地预测了垃圾填埋场的温度,揭示了废物分解产生的大量热量. 这种模型有助于理解温度变化及其对填埋场稳定性和液的影响.

关键词:
垃圾填埋场的污水处理温度概况 温度概况废物层和麦科马克计划的废物层.

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科学领域:

  • 环境工程 环境工程
  • 地质技术工程 地质技术工程
  • 数字建模 数字建模

背景情况:

  • 垃圾填埋场温度升高会对垃圾填埋场的覆盖面,稳定性,坡度和液迁移产生负面影响.
  • 了解和预测这些温度对于有效的垃圾填埋管理至关重要.

研究的目的:

  • 开发和验证一个分布式数值模型,用于预测垃圾填埋场内的温度概况.
  • 分析废物分层和分解过程对填埋场温度的影响.

主要方法:

  • 使用麦克科马克有限差异方法开发了一个分布式数值模型.
  • 该模型包含废物分层 (新废物与旧废物),有氧和无氧过程的不同热量生成值.
  • 使用具有特定边界条件的预测器-校正器方法 (Dirichlet在表面,没有流量在底部).

主要成果:

  • 该模型与现场观测有很好的一致性,相关系数为0.8 (校准) 和0.73 (验证).
  • 在所有深度和季节,模拟温度始终超过大气温度.
  • 记录了333°C (12月) 的最大温度差异和22°C (6月) 的最小温度差异,由于有氧降解,上层的温度更高.

结论:

  • 开发的数值模型有效地预测了垃圾填埋场温度变化.
  • 由分层和水分运动影响的废物分解,显著影响了垃圾填埋场内部的温度.
  • 该模型的准确性支持其用于预测不同气候条件下的垃圾填埋场温度.