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介绍高级计量构架(AMI)在智能电网中的地位及全球AMI技术和市场发展动态,分析智能计量技术和智能检定系统的技术优势和发展前景,最后介绍了欧洲、美国和中国计量技术研究机构顺应智能电网技术要求,开展新一代智能计量技术研发项目的最新动态. 相似文献
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《工业计量》1993,3(4):26-28
二、芬兰的法制计量及实验室认证工作 1.组织机构 (1).1991年6月调整前的机构 芬兰自1991年6月开始,为适应欧洲统一大市场的需要,对计量、认证与技术检验机构体系作了较大的调整。在这之前,芬兰贸工部下设的技术监督检查中心(TTK)统一管理计量与技术安全检验工作。TTK内设四个部。即综合技术部、压力容器部、计量部以及行政部。(见下图) 由计量部的计量服务处统一管理全国的计量工作并代表国家与国际组织合作。(见下图) (2).1991年6月调整后的组织机构 1991年6月后,面对1992年实现欧洲统一大市场,芬兰计量与技术检验机构按欧洲有关法规的… 相似文献
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为了在国际范围内解决计量器具使用中存在的技术问题和管理问题,1955年10月,在巴黎,经法、英、美等20多个国家政府批准,缔结了国际法制计量公约。成立了国际法制计量组织(法文缩写为OIML)。主要宗旨是:确定法制计量的一般原则,促进计量立法的国际一致:制定并推荐国际性计量技术法规;交流国际间新的检定方法;协调国际间因制造、使用和检定计量器具而出现的问题;协助发展中国家发展法制计量工作。 目前.国际法制计量组织共有成员国49个,通讯成员32个。其组织机构如下: 一、国际法制计量组织的组织机构 国际法制计量组织的组织机构如图所示: … 相似文献
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9月13至17日 ,国家质检总局计量司在杭州举办了中德法制计量研讨班。此次研讨班邀请了在欧洲和国际法制计量学界有影响的三位德国专家 ,德国联邦物理技术研究院法制计量办公室主任阿佩尔先生、德国图林根州计量局局长萨默博士和巴登符腾堡州计量局局长沃尔克先生来华讲学。阿佩尔先生主要介绍了定量包装标识标志 ;欧洲计量器具指令 ;国际法制计量组织(OIML)的目标、任务、组织机构 ;法制计量中对软件测试的要求 ;法制计量新的发展趋势等情况。萨默博士重点介绍了法制计量管理中预防性措施(现行)和强制性措施两种体系 ,及其发展… 相似文献
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为进一步促进质检系统计量技术机构的改革与发展,总结计量技术机构在履行职责、改革创新工作中的经验,彰显计量技术机构、计量人在服务国家经济建设、社会发展中的作用,国家质检总局计量司以质检量函[2009]28号文,要求有关单位重点调研一些计量技术机构工作中的成功做法、先进事迹和典型经验,并委托《中国计量》杂志社负责组织专题报道。本刊从这期开始将陆续开展相关报道,希望有关单位踊跃投稿、积极参与。 相似文献
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本文所指的计量技术机构是指计量技术领域的企事业单位,包括研究院所、专业高校和企业.采用知识产权分析方法对计量技术机构在计量检测领域拥有的专利现状进行研究,系统分析计量技术机构涉及的主要技术领域、技术发展趋势、专利技术区域分布情况以及专利引文分析,从而为了解计量技术机构的计量科技创新能力及技术发展态势提供新的参考依据. 相似文献
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《International journal for numerical methods in engineering》2018,113(9):1488-1506
In this paper, we present a new method for inserting several triangulated surfaces into an existing tetrahedral mesh generated by the meccano method. The result is a conformal mesh where each inserted surface is approximated by a set of faces of the final tetrahedral mesh. First, the tetrahedral mesh is refined around the inserted surfaces to capture their geometric features. Second, each immersed surface is approximated by a set of faces from the tetrahedral mesh. Third, following a novel approach, the nodes of the approximated surfaces are mapped to the corresponding immersed surface. Fourth, we untangle and smooth the mesh by optimizing a regularized shape distortion measure for tetrahedral elements in which we move all the nodes of the mesh, restricting the movement of the edge and surface nodes along the corresponding entity they belong to. The refining process allows approximating the immersed surface for any initial meccano tetrahedral mesh. Moreover, the proposed projection method avoids computational expensive geometric projections. Finally, the applied simultaneous untangling and smoothing process delivers a high‐quality mesh and ensures that the immersed surfaces are interpolated. Several examples are presented to assess the properties of the proposed method. 相似文献
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Standards are the basis for production enterprises to organize production ex-factory inspection trade 《中国标准化(英文版)》2008,25(1):24-25
Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.…… 相似文献
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A flow calorimeter for enthalpy increment measurements on condensed gases is presented. A better knowledge of the properties of the liquefied natural gas is needed, and therefore a liquid loop has been designed for our flow calorimeter. The fluid loop in the calorimeter is designed in order to avoid the two-phase region, since two phases would give compositional disturbances in the measurements. The avoidance of the two-phase region is made possible by increasing the pressure of the test fluid after the measurement section, then heating the fluid at super-critical pressure past the critical point. Finally, the fluid is throttled to the low-pressure gas state at the inlet condition of the compressor that circulates the fluid. To perform the pressure increase, a new cryogenic pump has been designed. To evaluate the new equipment, measurements were taken on liquid ethane over the temperature range 146–256 K at pressure between 0.9 and 5.1 MPa. 相似文献
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On November 30, 2007, the China Association for Standardization (CAS) held a press conference at Beijing Diaoyutai State Guest House. Leaders from the China Household Electric Appliance Research Institute, the China Household Electric Appliance Association, and the China Consumers' Association attended and made speeches.…… 相似文献
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Steffen Müller-Probandt 《材料科学与工程:中英文B版...》2018,(4):161-177
We associate a variety of innovations with the term "Industry 4.0". The pioneer of many 4.0 modifications forms the basisfor the trend towards the integrated di... 相似文献
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Zusammenfassung Bei der Gestaltung von Ernteprozessen — beispielsweise des Prozesses Mähdrusch, Körnertransport und -abnahme — als transportverbundene Fließarbeitsverfahren mit mindestens zwei verschiedenen Arbeitsmitteln gibt es einen großen Optimierungsspielraum. Solche Prozesse sind mehrstufige Bedienungsprozesse mit gemischter Anordnung der Bedienungseinrichtungen. Außerdem besitzen sie stark ausgeprägte räumliche Aspekte. Es wird vor allem gezeigt, welche Merkmale solcher Prozesse in Simulationsmodellen abgebildet sein müssen, welche Zielgrößen in Abhängigkeit von welchen Einflußgrößen unter Berücksichtigung welcher Prozeßbedingungen ermittelt werden sollten und wie der Bewertungsprozeß zur Ermittlung der gewünschten Informationen gestaltet werden muß. 相似文献
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Janet Lang 《Materials and Manufacturing Processes》2017,32(7-8):857-866
ABSTRACTThe production of ferrous metal increased during the Roman Late Republican period, Principate and Empire. The direct bloomery process was used to extract the metal from its ores using slag-tapping and slag-pit furnaces. The fuel was charcoal and an air blast was introduced by bellows-operated tuyères. Iron formed as a bloom, often as a spongy mass of metal, which contained impurities from the smelting process, including unreacted ore, fuel, slag and fragments from the furnace walls, while the metal was often inhomogeneous with varied carbon contents. Blooms were either smithed directly into bars or ingots or they were broken up, which also allowed the removal of gross impurities and a selection of pieces with similar properties to be made. These could then be forge-welded together and formed into characteristically shaped ingots. Making steel in the furnace seems to have been achieved: it depended on the ore and the furnace and conditions within it. Surface carburization was also carried out. Iron and steel were used extensively in construction and for tools and weapons. Fire welding was often used to add pieces of steel to make the edges of tools and weapons, which could be heat-treated by quenching to harden them. 相似文献
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C. Qihong W. Zhan‐Wen J. Yi J. Yehua L. Fei F. Hanguang 《Materialwissenschaft und Werkstofftechnik》2014,45(7):582-590
In the present study a high‐boron high speed steel (HSS) roll material was designed. Many expensive alloy elements have been substituted by cheap boron alloy, and high‐boron high speed steel roll has been manufactured by centrifugal casting method. The microstructures, mechanical properties and wear resistance of centrifugal casting high‐boron high speed steel roll have been investigated by optical microscopy (OM), scanning electron microscopy (SEM), and X‐ray diffraction (XRD) analysis, hardness test, impact test and wear test. The results indicated that the solidification microstructures of high‐boron high speed steel roll consisted of M2(B,C), (W,Mo)2(B,C), M3(B,C), M23(B,C)6 type borocarbides and martensite, a small amount of retained austenite. Borocarbides were continuously distributed over the grain boundary. After quenching from 1050 °C, local broken network appeared in partial borocarbides, and fine secondary borocarbide precipitated from the matrix. After tempering from 525 °C, the amount of precipitated borocarbide increased significantly. After heat treatment, the hardness of high‐boron high speed steel roll excelled 60 HRC, and its impact toughness excelled 8.0 J/cm2. The single groove steel rolling amount of high‐boron high speed steel rolls increases by 500% than that of bainite cast iron roll, when the rolls are used in K1 mill housing of bar mill. 相似文献
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Dimiter Hadjistamov 《材料科学与工程:中英文B版...》2019,(2):56-65
The definition of the thixotropy is a decrease in viscosity with time in shear and a subsequent recovery of viscosity after the shear deformation is removed.We ... 相似文献