基于异常值检验的一种测量仪器技术状态质量控制方法

测量仪器随着其使用年限、使用频次、维护保养程度、实验室环境条件变化等因素的影响,其技术状态不可避免的受到影响。如何通过不间断的数据链对测量仪器的技术状态进行客观有效的监控和分析是每个标准测量实验室面临的共同问题。GJB 2712A-2009《装备计量保障中测量设备和测量过程的质量控制》在第6.8.3条款中明确要求"为了满足计量保障要求,使设计的测量过程始终处于受控状态,应对测量过程进行有效的控制,控制方法包括控制法和统计技术方法"。文章从统计技术方法的角度切入提出了基于异常值检验的一种测量仪器技术状态质量控制方法。     

测量仪器

测量仪器在我国有关计量法律、法规或人们习惯上通常称为计量器具,计量器具是测量仪器的同义语,实际上一般统称为测量仪器。测量仪器在计量工作中具有相当重要的作用,全国量值的统一首先反映在测量仪器的准确和一致上,所以测量仪器是确保全国量值统一的重要手段,是计量部门加强监督管理的主要对象,也是计量部门提供计量保证的技术基础。一、测量仪器按定义测量仪器是指“单独地或连同辅助设备一起用以进行测量的器具”（见ＪＪＦ１００１-１９９８《通用计量术语及定义》６１条,以下只简称条款）。测量仪器是用来测量并能得到被测对象确切量…     

新版《通用计量术语及定义》系列讲座 第一讲 测量仪器

计量术语及定义的变化是当代计量技术和计量管理发展的反映。统一的计量名词对于传播计量技术、规范计量管理、开展技术交流不可或缺,因而学习理解计量术语及定义对每一位计量工作者都非常重要。JJF1001-2011《通用计量术语及定义》是对JJF1001-1998的修订,是我国当前计量工作中具有综合性、基础性、法制性的技术文件之一。考虑到测量仪器(即计量器具)及其特性的概念与定义在计量工作中的重要性与实用性,本刊以一讲的篇幅介绍"测量仪器",并分四讲详细介绍"测量仪器的特性"。     

纳米计量标准的发展现状与趋势

纳米计量技术能够为超精密加工技术提供纳米级位移和三维形貌,在纳米技术中扮演着重要角色.纳米计量标准包括台阶、膜厚、光栅及线宽等,用来校准现场条件下的纳米测量仪器.为了解纳米计量标准的发展现状与趋势,分析了台阶、膜厚、光栅以及线宽等纳米计量标准的国内外现状、国际比对情况和发展趋势,对实现解决测量仪器的溯源性,建立国际单位制下的纳米计量体系做出了相应工作.随着一个技术节点到下一个技术节点,为保证测量仪器的准确度,需要开展更小尺寸下纳米计量标准和测量方法的研究.     

ZKY-2000真空仪 ZKJ-90真空继电器

泰州市计量测试技术研究所是专业从事计量测试技术研究和计量仪器仪表研制、生产及检定的法定计量技术机构。该所成立于1952年，并在50华诞之际的2002年通过了CNAL校准实验室国家认可（认证号为L0044）。该所从事真空测量仪器仪表的研制生产已有近三十年历史。     

En值在校准实验室中的应用

本文提出了在校准实验室中普遍应用的统计计量En值，并对其在实验室间比对；计量标准测量不确定度验证；测量仪器间比对；测量仪器或计量标准的核查等方面进行了简要分析。     

关于油气井测试计量技术的研究

随着石油企业的生产和建设,大量的测量仪器投产,现场自动化程度的不断发展,油田内部计量技术机构面临新的机遇和挑战。采用特殊测量仪器校准作为油气计量工作的工作中心,以确保准确可靠,已达到国家要求的基本标准,以提高实验室校准强度,采用现代化的管理手段,提高服务管理水平,为建立计量技术机构在油田公司的专业地位。可见油气井测试计量技术在油气井系统的重要性,本文从计量技术在企业生产中的重要性出发,对油气井测试计量技术在油气井系统的作用做了有关论述,旨在为做好油气井计量技术管理提供参考。     

ZKY-2000真空仪 ZKJ-90真空继电器

泰州市计量测试技术研究所是专业从事计量测试技术研究和计量仪器仪表研制、生产及检定的法定计量技术机构。该所成立于1952年，并在50华诞之际的2002年通过了CNAL校准实验室国家认可（认证号为L0044）。该所从事真空测量仪器仪表的研制生产已有近三十年历史。     

ZKJ-90真空继电器 ZKY-2000数字式真空测控仪

泰州市计量测试技术研究所是专业从事计量测试技术研究和计量仪器仪表研制、生产及检定的法定计量技术机构。该所成立于1952年，并在50华诞之际的2002年通过了CNAL校准实验室国家认可（认证号为L0044）。该所从事真空测量仪器仪表的研制生产已有二十多年历史．主要产品有。     

关于测量仪器示值特性评价术语的探讨

测量仪器的示值特性是测量仪器性能好坏的重要标志，是测量仪器的重要技术指标，也是测量仪器的设计、生产单位特别关注。计量、检验机构特别重视，测量、使用部门特别关心的重要技术指标。因此对测量仪器的示值特性评价给予准确、科学的术语描述就显得十分重要。     

Insertion of triangulated surfaces into a meccano tetrahedral discretization by means of mesh refinement and optimization procedures

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.     

Certification Institutions Expected to Update and Transfer Information on Present Standards

Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.……     

From Industry 4.0 to Research 4.0. Development of High Performance Fibers in the Light of Digitization

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...     

Flow calorimeter for enthalpy increment measurements on condensed gases

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.     

Refrigerators Enter a New Era of Health Preservation Frestech initiates the establishment of China's first standard for household sterilization refrigerators

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.……     

Roman iron and steel: A review

ABSTRACT

The 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.     

Optimum-Simulation von Ernteprozessen

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.     

A study of centrifugal cast high boron high speed steel

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.     

Brainstorming for ISO Strategy 2016-2020

正Responding to ISO’s appeal for survey for the to-be-developed ISO Strategy Plan for 2016-2020,SAC hosted a special workshop over the needs and comments of various fi elds on June 8 in Beijing.The workshop was attended by ISO President-elect and Ansteel General Manager Zhang Xiaogang,SAC Vice-Administrator Yu Xinli,and 30 experts from