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拉伸试样制备要求进行量化的探讨
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作者 高连勇 梁健 +1 位作者 司彦教 贾永新 《电焊机》 2015年第4期119-122,共4页
提出N B/T47014-2011《承压设备焊接工艺评定》标准中拉伸试样制备要求的文字与附图存在表达含义不统一的问题,使企业在制备拉伸试样时出现理解偏差,出现两种加工方法。通过分析提出影响焊缝与母材齐平的关键因素是错边量,对承压设备错... 提出N B/T47014-2011《承压设备焊接工艺评定》标准中拉伸试样制备要求的文字与附图存在表达含义不统一的问题,使企业在制备拉伸试样时出现理解偏差,出现两种加工方法。通过分析提出影响焊缝与母材齐平的关键因素是错边量,对承压设备错边量的相关规定进行了分析,通过误差值分析确定了试件制造公差的1/4系数,并结合G B150-2011《压力容器》标准及相应专业的公差确定规则,提出对标准条款的修改建议。修订后的条款有利于企业对标准条款理解统一,可操作性好,具有一定的参考价值。 展开更多
关键词 拉伸试样 制备要求 错边量 条款修订
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防水混凝土应用研究综述
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作者 李瑞丰 麻建锁 +1 位作者 程岚 张敏 《门窗》 2018年第7期244-244,共1页
防水混凝土如今成为当今关注的问题,随着经济水平与科技实力的快速提升,混凝土技术在我国项目工程建设中得到了前所未有的发展,在新时代的发展背景下,防水混凝土应用日益得到广泛。然而,对于防水混凝土技术的具体应用,现实生活中... 防水混凝土如今成为当今关注的问题,随着经济水平与科技实力的快速提升,混凝土技术在我国项目工程建设中得到了前所未有的发展,在新时代的发展背景下,防水混凝土应用日益得到广泛。然而,对于防水混凝土技术的具体应用,现实生活中或多或少的总会存在一些问题,导致混凝土的防水性能达不到设计与规范要求。鉴于此,本文研究了防水混凝土种类,抗渗措施,及制备要求等问题,提供研究人员的参考。 展开更多
关键词 防水混凝土 抗渗措施 制备技术要求
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Theil Utility Based Multi-Device Cooperation Mechanism for Service Quality Equilibrium in Ubiquitous Stub Environments 被引量:2
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作者 RUI Lanlan MU Nan +2 位作者 GUO Shaoyong QIU Xuesong ZHANG Jie 《China Communications》 SCIE CSCD 2014年第6期140-150,共11页
An approach to make heterogeneous devices cooperate with each other to provide ubiquitous service remains a longstanding challenge in ubiquitous environments. In addition, when multi-user request ubiquitous services s... An approach to make heterogeneous devices cooperate with each other to provide ubiquitous service remains a longstanding challenge in ubiquitous environments. In addition, when multi-user request ubiquitous services simultaneously, the arbitrariness in resource allocation process easily leads to non-equilibrium of qualities of multiuser's services. Thus, How to design an effective heterogeneous devices cooperation mechanism that meet the QoS requirements and also equilibrate QoS among multi-user's services becomes a very tough problem. In the paper, Equilibrium Index and Theil Utility function are imported to establish a multidevice equilibrium cooperation model, which is benefit for resource allocation in ubiquitous environments. Then a Theil-Equilibrium based Cooperation Mechanism for multi-service is proposed. Firstly, in order to simplify calculating, a dimensionless processing is introduced. After that, a cooperation approach with Theil-Utility Heuristic algorithm is designed to choose the best solution for the simplified model. At last, the mechanism is simulated in a smart home scenario. The simulation results show that this mechanism outperforms non-equilibrium method by improving almost 40% in internal equilibrium with just reducing 0-2% in the total utility ofall the requested ubiquitous services. These data show that the proposed mechanism performs well in equilibrating qualities of multi-user's ubiquitous services. 展开更多
关键词 ubiquitousstub environments cooperation among multi-device QoS equilibrium equilibrium index theil utility
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CSA 016-2013, Interface requirements for application of LED lighting: Street/tunnel light consisting of LED module with heatsink and separated control gear
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作者 周详 郑成龙 赵璐冰 《China Standardization》 2014年第5期80-83,共4页
With the advantages of long lifetime, high lighting effect and non-pollution, LED lighting has taken a leading role in the lighting sector. LED street and tunnel lights have no unified product interface, so the produc... With the advantages of long lifetime, high lighting effect and non-pollution, LED lighting has taken a leading role in the lighting sector. LED street and tunnel lights have no unified product interface, so the products of different enterprises cannot interchange with each other, restraining the development of the whole industry due to the large-scale production problem. The alliance standard CSA 016-2013 has been approved as a national standard project, paving the way for the orderly development of LED industry. Interpreting the CSA 016 standard, the paper expounds on the technical requirements for interchangeable interface in the optical, mechanical, electrical and thermal aspects. 展开更多
关键词 street and tunnel light MODULARIZATION interchangeable INTERFACE
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