温湿度计检定箱温度量检定方法探讨

温湿度计检定箱是一种用于模拟自然气候温湿度状态的专用设备,其性能直接与被检设备检定结果相关。本文根据开展温湿度计检定箱性能检定工作的需要,针对当前缺少温湿度计检定箱检定规程的实际,研究参考相关的国家标准和规范,提出温湿度计检定箱温度量的技术指标、检定方法和检定数据处理规则,以规范温湿度计检定箱检定工作程序。     

数字温湿度计温度校准方法的探讨

数字温湿度计是当今各生产企业广泛使用的环境监测设备。为了确保数字温湿度计的量值准确可靠,为该仪器提供校准的依据,对数字温湿度计温度的校准方法进行了探讨,并对其进行了不确定度评定。     

数字式温湿度计温度、湿度修正值测量不确定度评定

数字式温湿度计广泛应用于实验室环境监测、车间、库房、药房等场合，计量检定机构每年收到的送检量非常大。因此，对于所出具证书中数字式温湿度计的修正值以及测量不确定度的准确性要求就比较高。由于数字式温湿度计所包含的种类广泛，不同种类的数字式温湿度计的具体检测温度、湿度点不尽相同，文章仅通过一组数据的具体实例，详尽地对数字式温湿度计温度、湿度的修正值进行不确定度分析，并不具体针对某一特定类别的数字式温湿度计的检测点。     

浅谈机械式温湿度计的维护及检定注意事项

文中介绍了几种温湿度计在检定过程中可能遇到的问题,结合笔者的工作实践所得,探讨了温湿度计的维护及检定注意事项。     

检定机械式温湿度计的不确定度评定

以机械式温湿度计测量结果为研究对象,论述了机械式温湿度计温湿度测量结果的误差来源及其测量不确定度的分析。     

基于图像识别的数字温湿度计自动校准装置的设计

本文通过对现有数字温湿度计校准装置及方法的综述，指出当前自动化校准需求的迫切性，并提出一种基于图像识别技术的数字温湿度计自动校准装置的设计方案。在现有校准装置的基础上，添加高分辨率工业相机、样品支架和条形光源等设备，通过LabVIEW进行自动校准系统开发，实现对多表位数字温湿度计显示值的拍摄，并自动进行图像处理、数据识别和生成原始记录等。通过该设计方案，在一定程度上有效地降低了人员劳动强度，大大提高了数字温湿度计的校准工作效率和测量准确性。     

温湿度示值误差不确定度评定

按照JJG 205-2005《机械式温湿度计检定规程》的要求,对机械式温湿度计的检定方法进行分析,并从精密露点仪示值误差、被检温湿度计分辨、温湿度检定箱均匀性、波动性等方面引入的不确定分量进行了分析,结合JJF1059.1-2012《测量不确定度评定与表示》的要求,给出了机械式温湿度计示值误差测量结果的不确定度评定。     

机械式温湿度计相对湿度检定的不确定度评定

一、概述本文按照JJG205-2005《机械式温湿度计》检定规程的要求,使用实验室配置的精密露点仪标准装置、标准温湿度检定箱,由温湿度检定箱提供稳定的温湿度环境,将被检温湿度计和露点仪标准器放入箱内,由露点仪测量的相对湿度值作为标准值,被检温湿度计的湿度示值为测量值。     

机械式温湿度计示值误差的测量不确定度评定

本文主要阐述了机械式温湿度计示值误差测量结果的不确定度的来源和评定方法,适用于机械式温湿度计测量结果的不确定度的评定。     

浅谈风速变化对温湿度计测量结果的影响

本文结合作者多年来从事温湿度计的检定(校准)的实践,通过实验探究风速对各类温湿度计测量结果的影响;对实际科研生产活动中,减小因环境风速变化对温湿度计测量结果造成的影响,提升对环境温湿度的监控能力有一定参考价值.     

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.……     

The Research of Anti-Wear Properties of Organomolybdenum Compounds in the Engine Oils

A four-ball tester was used to evaluate the anti-wear performance of three kinds of organomolybdemun compounds in the engine oils, i. e., molybdenum dialkyldithiophosphate (MoDDP), molybdenum dialkyldithiocarbamate ( MoDTC), and sulphur and phosphorus freeorganomolybdeum (Molybdate). The results indicate that a low concentration of MoDDP doesn' t improve the anti-wear properties of the commercial engine oils, but a high concentration of MoDDP can obviously improve the anti-wear properties and the load-carrying capacity of the engine oils. MoDTC doesn' t improve the antiwear properties of the engine oils, but worsens the anti-wear properties of the oils. Signifi can timprove ment of frictional and wear characteristics is obtained with Molybdate added in the commercial engine oils and the formulated oils.     

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.     

Certification Becomes Important for the I Quality; and Safety Supervision of the Chinese Liquor Sector

The end of 2007, over 200 unit products of more than 80 Chinese firms have passed the quality grade certification for liquor products. These products involve distilled spirits, beer, wine, yellow wine, fruit syrup wine and others, and cover over 80% of the national top-branded liquor products.……     

Deposition and Coating Properties on CVD Tungsten

Surface characterization and microstructure studies are performed on chemical vapor deposited (CVD) tungsten coating. There is about 2 μm thickness diffusion layer of tungsten in the molybdenum substrate. The thermal shock test shows tungsten coating has good adhesion with molybdenum substrate, but the elements of oxygen and carbon in the tungsten coating have the bad affection to the adhesion. The result of high-temperature diffusion experiment is the diffusion rate from molybdenum substrate to tungsten coating is faster.     

Analysis of marine hydrobiont lipid extracts as possible cryoprotective agents

We studied a combined effect of the cryoprotectants both of lipid and carbohydrate origin at the presence of DMSO or without it on cell viability and the RNA synthesis in the embryonic mollusc and echinoderm cell cultures obtained at different developmental stages. Cryoprotective properties of exogenous lipids correlated with their thermotropic behavior. Lipid extracts from marine hydrobiontes, which thermal transitions are characterized by relatively small part of calorimetric thermogram area lying at temperatures above 0 °C (6–18%), were found to possess a considerable cryoprotective activity. The results are discussed in relation to the prediction of the cryoprotective activity of lipid extracts for marine animal cells. In addition, it was found that marine invertebrate cells can be cryopreserved without DMSO at the presence of trehalose and lipid extracts of some marine hydrobiontes.     

Low-Temperature Properties of Silver

Pure silver is used extensively in the preparation of high-temperature superconductor wires, tapes, films, and other configurations in which the silver not only shields the superconducting material from the surrounding materials, but also provides a degree of flexibility and strain relief, as well as stabilization and low-resistance electrical contact. Silver is relatively expensive, but at this stage of superconductor development, its unique combination of properties seems to offer the only reasonable means of achieving usable lengths of conductor. In this role, the low-temperature physical (electrical, thermal, magnetic, optical) and mechanical properties of the silver all become important. Here we present a collection of properties data extracted from the cryogenic literature and, to the extent possible, selected for reliability.     

Early ironwork in Biscay: Survey,excavation, experimentation and materials characterization. An integral study of the mountainside ironworks (ferrerías de monte or “haizeolak”)

ABSTRACT

The production of iron in Biscay (Basque Country, Spain) has been a hallmark of this territory of the North of the Iberian Peninsula throughout its history. The Archaeology team of the Basque Country Mining Museum has spent 13 years, so far, studying the origins of this activity through the evidences left at the old pre-hydraulic iron production workshops known as mountainside ironworks (ferrerías de monte) or haizeolak. It has catalogued 170 archaeometallurgical sites of this type in Biscay, and the archeological excavation of some of them has led to the knowledge of the different stages of the production process that took place in these workshops. The team has also experimentally reproduced the work carried out in a mountainside ironworks from the High Middle Ages, and it has currently started the characterization process of this type of activity through the study of the collected materials.     

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     

CNAS Passes APLAC's PTP Review

正The review group of Asia Pacific Laboratory Accreditation Cooperation(APLAC)carried out a 4-day peer review of the proficiency testing provider(PTP)for China National Accreditation Service for Conformity Assessment(CNAS)from July 28 to 31,2014.CNAS passed the PTP review with excellent performance.Two senior peer reviewers of APLAC made a comprehensive,rigorous and detailed review of CNAS’s PTP accreditation activities,and made the on-spot inspection of the review groups in Shanghai and Shenzhen respectively.