关于举办测量不确定度评定培训班的通知

自我国发布国家计量技术规范ＪＪＦ１０５９—１９９９《测量不确定度评定与表示》以来 ,很多单位作了大量宣贯工作。目前我们已决定等同采用ＩＳＯ／ＩＥＣ１７０２５—１９９９《检测和校准实验室能力的通用要求》,检定／校准和检测工作都急需加快测量不确定度评定应用的推广步伐。为帮助从事检定、校准或检测工作的技术人员更好地理解测量不确定度的评定与表示的方法和步骤 ,全国计量标准、计量检定人员考核委员会秘书处专门聘请了具有评定测量不确定度经验的资深专家 ,对测量不确定度评定和应用予以深入浅出的讲解 ,以解决在评定实践中…     

计量检定不确定度的评定方法运用实例

测量不确定度的评定和表述适用于计量检定、计量校准,它和误差是计量学中研究的基本命题,是计量测试技术人员经常运用的重要概念之一,它直接关系着测量结果的可靠程度和量值传递的准确一致。鉴于测量不确定度在检测,校准和合格评定中的重要性和影响,现就有关测量不确定度概念、测量不确定度的评定和表示方法作一介绍。     

电能计量标准装置测量不确定度评定应用实例

一、概述 计量标准装置的测量不确定度作为表征测量结果质量的尺度,已在计量工作中得到广泛应用.各级计量校准实验室的认证、计量标准技术报告的建立、检定或校准证书的出具等,都要求上级计量检测部门在给出测量结果时,提供相应的不确定度.不确定度越小.     

使用校准证书出具的测量不确定度探讨

0前言随着测试校准业务不断向其它领域扩展,测量不确定度的应用范围也在不断扩大,证书型式也从以前单一检定证书到检定证书与校准证书并存。当前,上级计量技术机构出具的校准证书均包含测量不确定度,如何正确使用该测量不确定度将是下级计量器具使用部门必须认真考虑的问题,本文列举了四种典型的情况,讨论了测量不确定度在实际使用中常见问题。     

利用Excel电子表格评定测量不确定度

随着<检测和校准实验室能力的通用要求>与<法定计量检定机构考核规范>的实施,对榆测或校准结果提出了更高的要求,不但要提供检测或校准结果的数据,还应提供检测或校准结果的测量不确定度.     

浅谈不确定度在企业的应用

不确定度是一个不常用的计量术语,ISO9001标准及ISO10012－1标准要求测量设备的不确定度要已知,同时技术监督部门要求企业计量检测、检定（校准）作业中要给出不确定度。我们在贯彻ISO10012－1标准完善企业计量检测体系活动中,虽贯彻了这些要求,并按辽宁省技术监督局编写的培训资料《误差理论与测量不确定度表达》一书中的方法进行计算后出具在检定（校准）记录及证书上。由于不确定度在企业中应用尚在起步阶段,目前仍有相当数量检定（校准）人员对不确定度的作用还不大清楚,也就是仅看到增加了繁琐计算未看到应用价值,以至影响…     

两种统计方法用于不确定度A类评定的分析与比较

正在计量校准领域中,测量得到的结果必须有相应的测量不确定度描述才是完整的。给定了测量结果及对应的测量不确定度,便能确定被测量的真值以一定的概率(比如95%)处于一个确定的区间。测量不确定度是描述测量结果分散性的指标,如何评价这一指标所依据的主要文件是ISO联合7个国际组织发布的测量不确定度评估指南GUM及补充文件S1、S2等。各个国家计量机构和校准实验室均按照该标准文件体系对测量结果进行评估,这样能确保不同实验室校准得     

中国计量出版社新书推介

测量不确定度评定与表示实例———本书是全国计量标准、计量检定人员考核委员会为配合ＪＪＦ１０５９—１９９９测量不确定度评定与表示计量技术规范的宣贯而选编的 ,书中列举了测量不确定度评定与表示实例８０个 ,每个实例包括有关量值的测量方法、数学模型、方差和灵敏系统的计算、不确定度的评定、表示与报告等内容 ,对掌握测量不确定度评定和表示方法具有示范和指导作用。本书可供科研单位、检测／校准机构及工矿企业从事计量检定、检测／校准、产品检验、精密测试及科学实验的人员使用 ,也可供高等院校有关专业师生参考。定价 :６０．…     

测量不确定度在符合性判定中的应用

从计量校准和测量不确定度的定义出发,根据校准证书或报告出具的测量结果和测量不确定度,分析了测量不确定度对符合性判定的影响。结合实际应用,提出了符合性判定方法,结论可用于仪器仪表及设备、装备计量确认和装备校准过程中的符合性判定。     

计量出版社新书推介

《测量不确定度评定与表达指南》———本书是国家计量技术规范ＪＪＦ１０５９ -１９９９《测量不确定度评定与表示》的统一宣贯教材 ,由国家质量技术监督局计量司组织编写。主要内容包括三部分 :第一部分介绍必要的概率论与数理统计基础知识 ;第二部分以逐步展开的方式阐述《测量不确定度评定与表达》计量技术规范的内容 ;第三部分是不确定度在各测量领域中的应用实例。书中附有由７个国际组织发布的《测量不确定度表示指南》（ＧＵＭ）的原文。本教材可供科研单位 ,检测 /校准机构及各工矿企业从事计量检定、检测 /校准、产品检验、精密测…     

Gender differences in publication productivity in psychology in India

An analysis of gender differences in psychology in India provides quantitative and qualitative assessment of R&D output contributed by psychologists with the indication of the trend of growth, skewness, relatedness, co-authorship pattern of productivity.     

Metrology in Chemistry in Germany

The system for Metrology in Chemistry in Germany is described. At the national standards level, a network of high-level chemistry institutes coordinated by the national metrology institute, PTB, provides the primary references for chemical measurements. A dissemination mechanism employs chemical calibration laboratories accredited within the framework of the German Calibration Service (DKD). They act as “multipliers” between the national standards level and the user level by providing the user with calibration means which are traceable to the SI via national standards. Traceability structures in clinical chemistry, electrochemistry, elemental analysis and gas analysis are described     

Natural radioactivity in drinking water in private wells in Finland

Radiation Protection Dosimetry     

Natural radioactivity in drinking water in private wells in Finland

Natural radioactivity in drinking water was determined in population-based random study of 472 private wells. The mean concentrations of (222)Rn, (226)Ra, (234)U, (238)U, (210)Pb and (210)Po in drilled wells were 460, 0.05, 0.35, 0.26, 0.04 and 0.05 Bq l(-1), and in wells dug in the soil were 50, 0.016, 0.02, 0.015, 0.013 and 0.007 Bq l(-1), respectively. Approximately 10% of the drilled wells exceeded a radon concentration of 1000 Bq l(-1) and 18% a uranium concentration of 15 microg l(-1). The mean annual effective dose from natural radionuclides for a drilled well user was 0.4 mSv and 0.05 mSv for a user of a well dug in the soil. The effective dose arising from (222)Rn was 75% of the total of all natural radionuclides for drilled well users. As regards long-lived radionuclides, (210)Po and (210)Pb caused the largest portion of the effective dose. The dose arising from (238)U, (234)U and (226)Ra was only 8% of the total of all natural radionuclides.     

Trends in alcohol-impaired driving in Canada

While a general decreasing trend in the number of persons killed in a traffic crash involving a drinking driver has occurred in Canada since the 1980s, it is evident that much of this decrease occurred in the 1990s. Since 2002, less progress has been made as the number of persons killed in crashes involving drinking drivers remains high. To better understand the current situation, this paper describes trends in drinking and driving in Canada from 1998 to 2011 using multiple indicators based on data collected for the Traffic Injury Research Foundation's (TIRF) Road Safety Monitor (RSM), the National Opinion Poll on Drinking and Driving, and trends in alcohol-related crashes based on data collected for TIRF's national Fatality Database in Canada. There has been a continued and consistent decrease in the number of fatalities involving a drinking driver in Canada. This remains true when looking at the number of fatalities involving a drinking driver per 100,000 population and per 100,000 licensed drivers. This decreasing trend is also still apparent when considering the percentage of persons killed in a traffic crash in Canada involving a drinking driver although less pronounced. Data from the RSM further show that the percentage of those who reported driving after they thought they were over the legal limit has also declined. However, regardless of the apparent decreasing trend in drinking driving fatalities and behaviour, reductions have been relatively modest, and fatalities in crashes involving drivers who have consumed alcohol remain high at unacceptable levels.     

Radioactivity in building materials in Iraq

Activity concentrations of (226)Ra, (232)Th and (40)K in 45 samples of different building materials used in Iraq were measured using gamma-spectroscopy system based on high-purity germanium detector with an efficiency of 40 %. Radium equivalent activity, air-absorbed dose rate, annual effective dose, external and internal hazard indices and alpha index due to radon inhalation originating from building materials were measured to assess the potential radiological hazard associated with these building materials. The activity concentrations of the natural radionuclides (226)Ra, (232)Th and 40K were found to range from below detection limit (BDL) to 223.7 ± 9, BDL to 93.0 ± 3 and BDL to 343.1 ± 12, respectively. Values of average radium equivalent activity, air-absorbed dose rate, indoor and outdoor annual effective doses, external and internal hazard indices and alpha index ranged from 6.5 to 124.9, 16.2 to 89.5 (nGy h(-1)), 0.08 to 0.44 mSv, 0.02-0.11 mSv, 0.09 to 0.53, 0.13 to 0.69 and 0.03 to 0.62, respectively. These values indicate a low dose. Therefore, the building materials used in the current study are quite safe to be used as building materials.