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对新时乡集中供水方案优化比选的几点思考
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作者 陈海妮 《陕西水利》 2011年第4期163-165,共3页
饮水安全关系到农民身体健康,是新农村建设的重要内容之一。本文对新时乡供水现状和存在问题进行了客观分析,对其集中供水项目建设中水源、水质和地质条件进行了对比分析,力争使集中供水项目中水源利用合理化。
关键词 农村人饮 集中供水 水源方案 选比优化
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关于对魏北集中供水工程水源优化选比的几点思考
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作者 付敏 《农业与技术》 2014年第8期32-32,共1页
魏北集中供水工程地处礼泉县北部"旱腰带"干旱缺水区,水资源严重缺乏。本文对魏北供水现状和存在问题进行客观分析,对其水源、水质和地质条件进行对比分析,力争使项目中水源利用合理化。
关键词 农村人饮 水源方案 选比优化
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Optimization on bicriterion policies for M/G/1 system with second optional service 被引量:1
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作者 Jau-chuan KE Yunn-kuang CHU 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2008年第10期1437-1445,共9页
We compare the optimal operating cost of the two bicriterion policies, <p,T> and <p,N>, for an M/G/1 queueing system with second optional service, in which the length of the vacation period is randomly con... We compare the optimal operating cost of the two bicriterion policies, <p,T> and <p,N>, for an M/G/1 queueing system with second optional service, in which the length of the vacation period is randomly controlled either by the number of arrivals during the idle period or by a timer. After all the customers are served in the queue exhaustively, the server immediately takes a vacation and may operate <p,T> policy or <p,N> policy. For the two bicriterion policies, the total average cost function per unit time is developed to search the optimal stationary operating policies at a minimum cost. Based upon the optimal cost the explicit forms for joint optimum threshold values of (p,T) and (p,N) are obtained. 展开更多
关键词 Average operating cost Bicriterion policy Optimization comparisons Optional service Optimal threshold values
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Modification of Paraffin Wax for Manufacturing Difficult-to-Form Green Compacts and Its Application in WC-Co Cemented Carbides
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作者 Li Yi Wang Jincheng +1 位作者 Ni Juan Shen Shaobo 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2024年第11期3064-3076,共13页
The production of deep well-shaped WC-Co cemented carbide blocks via industrial powder pressing remains a challenging technical problem,primarily due to the unsuitability of the forming agent.The forming agent paraffi... The production of deep well-shaped WC-Co cemented carbide blocks via industrial powder pressing remains a challenging technical problem,primarily due to the unsuitability of the forming agent.The forming agent paraffin wax was modified through four types of modifiers,including organic high-molecular-mass resins,plasticizers,surfactants and lubricants.The qualitative screening of resin types was explored and an orthogonal experiment involving the combination of these four paraffin wax modifiers was conducted to obtain an optimized quantitative ratio of modifiers.The results reveal that the insertion of the small molecule chain of resin into the interstitial spaces of paraffin wax crystals is likely a crucial factor for improving the compatibility between the resin and paraffin wax.Through orthogonal experiments,the optimized formulation for the forming agent is determined:100 parts of 58#paraffin wax,15 parts of EVA-2,4 parts of DPHP,4 parts of oleic acid amide and 2 parts of stearic acid.This optimized formulation is applied to industrial production at one Chinese company,and qualified deep well-shaped cemented carbide products are achieved,which contain 90wt%WC and 10wt%Co. 展开更多
关键词 WC-Co cemented carbide deep well-shaped products forming agent paraffin wax modifier resin screening modifier ratio optimization
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