基于主要组件分析和机器学习,简化和模拟低效率建造湿地的评估过程
Lei Xie1, Jingjie Huang2, Xiang Zhu2
1Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, PR China.
The Science of the total environment
|October 16, 2024
概括
研究人员使用化学氧气需求 (COD) 和总 (TN) 指标简化了建筑湿地 (CW) 性能评估. 这种精简的方法准确地评估低效率的CW (LECW),并有助于其日常管理.
科学领域:
- 环境工程 环境工程
- 废水处理技术 废水处理技术
- 生态工程生态工程生态工程
背景情况:
- 目前建筑湿地 (CWs) 的性能评估复杂,缺乏简化模拟模型,特别是低效率CWs (LECWs).
- LECW被定义为那些使用重法计算的平均接近度<0.6的LECW.
研究的目的:
- 为LECWs开发一种简化和可靠的性能评估方法.
- 建立准确的模拟模型来预测CW运行效率.
- 确定影响LECW运营效率的关键因素.
主要方法:
- 应用重法 (EWM) 进行初始CW运行效率评估.
- 利用主要组件分析 (PCA) 来简化评估指标.
- 开发了随机森林 (RF) 模型来验证模拟模型的简化指标和物流回归 (LR).
主要成果:
- 对CW的评估指标被有效地简化为化学氧需求 (COD) 和总 (TN),与原始模型没有显著差异 (P <0.05).
- 为地下流量CW (SSF CW) 和表面流量CW (SF CW) 开发的模拟模型显示出高可靠性,R2值> 0.8.8.
- LECW的运行效率对COD去除率比TN去除率更敏感.
- 对于SSF CW和SF CW,当影响性COD/TN比率在3到5之间时,SSF CW和SF CW的最佳运行效率就会发生.
结论:
- 简化评估指标 (COD和TN) 提供了一种可靠和有效的方法来评估CW性能.
- 开发的模拟模型准确预测CW效率,并支持明智的管理决策.
- 结果为简化LECW的评估和日常管理提供了宝贵的见解.
相关概念视频
Mechanistic Models: Compartment Models in Algorithms for Numerical Problem Solving
44
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.
In individual population analyses, different algorithms are employed, such as Cauchy's method, which uses a...
In individual population analyses, different algorithms are employed, such as Cauchy's method, which uses a...
44
Typical Model Studies
342
Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.
342
Design Example: Analyzing Capacity Contours for Flood Risk Assessment
40
Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...
40


