Results 61 to 70 of about 78,527 (268)
城市内涝模拟中机理驱动、数据驱动及混合模型的对比研究与进展综述
Jingshui jishu【目的】针对城市化进程加速与极端暴雨频发背景下城市内涝治理需求，解决当前内涝模拟模型(机理驱动、数据驱动及混合模型)研究总结与对比不足的问题，为内涝精细化模拟及规划决策提供支撑。【方法】本文系统梳理机理驱动模型、数据驱动模型及混合模型的研究现状，对比分析各类模型的技术特性、适用场景、优势与局限，重点剖析混合模型的耦合路径及应用案例。【结果】机理驱动模型可精细刻画物理过程，但存在计算效率低、数据依赖强等局限；数据驱动模型能实现快速预测却面临物理可解释性弱、泛化能力受限等问题 ...
CHEN Hua, SUN Jingxiang
doaj +1 more source
Sludge Production and Disposal for Small Cold Climate Bio-Treatment Plants [PDF]
, 1972 Ultimate disposal of wastewater sludge has long been a problem which to a large degree has been ignored. Haney (1971) stated that: "Until process sludge can be handled with minimum environmental impact, we cannot claim to have a viable wastewater ...
Tilsworth, Timothy
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Sustainable Development, EarlyView.ABSTRACT The dynamic nature of small islands being geographically isolated and their perceived connectedness with global networks complicates research attempts to draw general conclusions on whether insularity leads to marginalization or strengthens their resilience for sustainable development.
Toheeb Lekan Jolaosho +2 more
wiley +1 more source
Jingshui jishu【目的】面对污水处理排放标准日益趋严以及运行成本持续上升的现实，借助智能化技术实现污水处理厂稳定运行与节能降耗已成为行业面临的迫切挑战。针对传统机理模型在复杂生物反应过程中适应性不足的问题，开展基于数据驱动的状态预测研究具有重要工程意义。【方法】本文针对某污水厂厌氧-缺氧-好氧活性污泥工艺，构建了长短期记忆(LSTM)网络状态预测模型。通过对实际运行历史数据进行清洗、归一化等，建立符合时间序列特征的模型输入输出结构。模型以进水水质指标、反应池运行状态变量与控制参数作为输入 ...
Shen Hao, Xin Kunlun
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The Circular Economy in European Union Supply Chains: A Literature Review
Sustainable Development, EarlyView.ABSTRACT This research aims to analyze the implementation of the circular economy (CE) in European Union (EU) supply chains (SC), highlighting its potential to transform production systems and maximize resource efficiency while minimizing waste. Our study identifies the major trends and advancements in this field, focusing on the barriers that prevent ...
Luis Oswaldo Rodríguez‐Mañay +2 more
wiley +1 more source
Jingshui jishu【目的】城镇供水管道是城市生命线工程的重要组成部分，一旦发生故障，不仅会威胁用户用水安全，还可能导致大规模水资源浪费和重大经济损失。应用科学可靠的风险评估方法对供水管道进行全面的安全风险评估变得愈发关键，是保障供水系统安全运行的重要手段。【方法】基于供水管道运行特征和风险管理理论，建立包含结构属性、运行状态、外部环境和服役属性多维度指标的风险评估体系，并采用结构熵权法确定各指标权重。运用模糊逼近理想解排序(TOPSIS)算法对风险指标数据进行归一化处理与动态排序 ...
Xu Shengxin +5 more
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Study of water recovery and solid waste processing for aerospace and domestic applications. Volume 2: Final report [PDF]
The manner in which current and advanced technology can be applied to develop practical solutions to existing and emerging water supply and waste disposal problems is evaluated. An overview of water resource factors as they affect new community planning,
Guarneri, C. A., Reed, A., Renman, R. E.
core +1 more source
Developing and Testing a Citywide Inclusive Sanitation Financial Tool
Sustainable Development, EarlyView.ABSTRACT Citywide Inclusive Sanitation (CWIS) represents a paradigm shift in the provision of safely managed sanitation services with a framework of three outcomes—equity, safety and sustainability. There are several sanitation financial tools, but none of these fully address all CWIS outcomes. Citywide Inclusive Sanitation Financial Tool (CWIS‐FiT) is
Camila Silva Franco +6 more
wiley +1 more source
Jingshui jishu【目的】为支撑智慧水务发展，满足水厂精细化调度需求，提升供水效率与资源利用率，需构建时供水量预测模型以优化生产调度。【方法】以华东地区A水厂为研究对象，本文综合时间特征、气象条件、设备检修工况及水力参数构建含58个初始特征的数据集，采用递归特征消除(RFE)算法筛选出16个关键特征，同时引入贝叶斯优化(BO)对极端梯度提升树(XGBoost)模型的超参数进行寻优，建立时供水量预测模型。【结果】BO后模型平均绝对百分比误差(MAPE)为4.58%,平均绝对误差(MAE)为676.02
Yang Yuling +5 more
doaj +1 more source
North Slope Borough water study: a background for planning [PDF]
, 1977 The Planning and Research Section of Alaska Dept. of Natural Resources initiated this pilot water study with the North Slope Borough and the University of Alaska's Arctic Environmental Information and Data Center and Institute of Water Resources ...
Dreyer, Linda Dwight, Johnson, Ronald A.
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