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基于混合和谐搜索算法的自压滴灌田间管网多目标优化设计
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作者 李千禧 何武全 +1 位作者 李渤 蔡明科 《节水灌溉》 北大核心 2024年第6期40-45,共6页
为了综合考虑管网投资和水压分布,合理进行管网布置和管径选择,以满足管网的经济性和可靠性,使自压滴灌管网系统达到投资最低和灌水均匀度最高的目的。以管网投资最低(管网经济性)和节点富余水头均值最小(管网可靠性)为目标,建立了自压... 为了综合考虑管网投资和水压分布,合理进行管网布置和管径选择,以满足管网的经济性和可靠性,使自压滴灌管网系统达到投资最低和灌水均匀度最高的目的。以管网投资最低(管网经济性)和节点富余水头均值最小(管网可靠性)为目标,建立了自压滴灌“梳子”形和“丰字”形田间管网系统的多目标优化数学模型,提出了混合和谐搜索算法求解多目标优化模型的方法和步骤。以新疆某自压滴灌工程为例,采用该方法对其田间管网系统进行优化,优化方案的管网总投资为47.63万元,与原设计方案相比降低了9.86%;管网节点富余水头均值为8.87 m,与原设计方案相比降低了28.37%。该优化设计方法得到的优化结果,不仅节省投资明显,而且节点富余水头均值显著减小,说明管网系统的压力偏差小,灌水的均匀度显著提高。优化结果表明,混合和谐搜索算法收敛速度快,计算精度高,在自压滴灌管网的多目标优化设计中具有很好的应用价值。 展开更多
关键词 自压滴灌 田间管网系统 管网经济 管网可靠性 混合和谐搜索算法 多目标优化设计
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汾河三坝灌区桥头提水低压管道输水灌溉工程的建设及效益分析 被引量:1
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作者 郭培成 《山西水利科技》 2002年第2期46-48,共3页
低压管道输水是一项较先进的节水灌溉技术,具有节水、节能、节地、省工、输水速度快、管理方便等优点,它已成为发展节水灌溉的有效途径之一。本文对桥头村引汾高灌设计、施工、管理、运行,投资及效益进行了分析。
关键词 汾河三坝灌区 低压管道 输水灌溉 经济管网 净值效益 提水灌溉
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小鹤立河水库扩建及其配套供水系统改造工程论证
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作者 刘伟 《黑龙江水利科技》 2008年第4期188-188,共1页
小鹤立河水库是鹤岗市的主要供水水库,水库扩建及其配套供水系统改造,充分利用了小鹤立河水库现有的水资源,也消除了水库隐患,提高了城市供水保证率,解决了城市供水紧张的局面,并使供水达到了经济运行。
关键词 水库扩建 系统改造 安全度汛 供水管网经济运行
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The Impact of the Environment Management Act (EMA) on the Accountability of Companies in Fiji
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作者 Glen Finau Jale Samuwai Masilina Rotuivaqali Clayton Kuma Lusiana Kanaenabogi Tevita Veituna 《Journal of Modern Accounting and Auditing》 2013年第9期1216-1234,共19页
This study seeks to explore the impact of the Environment Management Act (EMA) (2005) on the accountability of three companies in Fiji. The study uses a multi-case study approach based on three subsidiaries of a c... This study seeks to explore the impact of the Environment Management Act (EMA) (2005) on the accountability of three companies in Fiji. The study uses a multi-case study approach based on three subsidiaries of a conglomerate. Data collection methods include semi-structured interviews with accountants, internal auditors, and environmental officers, document reviews, and content analysis of annual reports and websites of the respective companies. The findings suggest that the EMA (2005) had some effects in terms of engendering accountability on the companies studied. Further evidence suggests that while this increased accountability has led to disclosures in annual reports and websites, these disclosures are minimal at best; furthermore, they primarily address that the stakeholder group comprised government regulatory authorities. The study provides policy implications on how environmental legislations could be designed to improve the accountability of commercial entities in developing economies. The experience and issues highlighted are also useful to other developing economies who are contemplating in developing their own environmental legislations. This paper is one of the few papers that explore the impact of environmental legislations on accountability in a developing economy context. 展开更多
关键词 environmental legislation Environment Management Act (EMA) sustainability developing economy ACCOUNTABILITY
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