煤炭堆密度小容器测定不确定度评定

依据《煤炭堆密度小容器测定方法》对煤炭堆密度进行测定,参考《煤质分析中测量不确定度评定指南》和《测量不确定度评定与表示》分析了测定过程中的不确定度来源,并对每个标准不确定度分量进行了评定,在此基础上计算出合成标准不确定度和扩展不确定度。     

煤中灰分测量不确定度评定

依据GB/T212-2008《煤的工业分析方法》测定煤中灰分,检测使用仪器电子天平、智能马弗炉。根据《煤炭检验中测量不确定度评定指南》(MT/T1013-2006)有关规定建立数学模型,对煤中灰分测量不确定度的来源进行全面、细致的分析,并对不确定度分量进行计算,最后得出扩展不确定度的结果,从而保证检测结果的准确性和稳定性,为煤炭企业提高产品和质量效益提供保证。     

托辊旋转阻力测量结果不确定度的分析

本文对托辊的旋转阻力依据MT821 1999《煤矿井下用带式输送机托辊技术条件》标准进行检验,并按JJF1059 1999《测量不确定度评定与表示》计量技术规范对测量结果的不确定度进行评定与分析。     

电子天平称量结果的不确定度评定

依据JJG 98-1990<非自动天平(试行)检定规程>和JJF 1059-1999<测量不确定度评定与表示>,查找影响电子天平称量结果不确定度的各个来源,并对各分量进行分析、计算、合成.     

催化燃烧式甲烷测定器检定装置测量不确定度评定

根据JJF1059-1999《测量不确定度评定与表示》要求,对催化燃烧式甲烷测定器检定装置测量不确定度的评定与表示方法进行了详细介绍,有利于大家对该方法的理解。     

测量重复性导致的标准不确定度评定方法分析

分析了JJF 1059—1999《测量不确定度评定与表示》中,利用贝塞尔公式计算测量重复性引入的标准不确定度分量时,对测量次数n的要求,建议MT/T 1013—2006《煤炭检验中测量不确定度评定指南》中,应用贝塞尔公式时对测量次数n的要求做适当的修改。     

甲烷报警仪1.OO%CH4点检定的测量不确定度评定

根据JJF1059-1999《测量不确定度评定与表示》要求，对甲烷报警仪基本误差检定测量不确定度的评定与表示方法进行介绍，有利于对该方法的理解。     

氧气检测报警仪检定装置测量不确定度评定

根据JJF1059-1999《测量不确定度评定与表示》要求,介绍了氧气检测报警仪检定装置测量不确定度的评定与表示方法,有利于大家对该方法的理解。     

煤的干基灰分测量不确定度的评定与分析

依据GB/T 212-2008《煤的工业分析方法》对煤的干基灰分进行测定,基于JJF 1059-1999《测量不确定度评定与表示》对影响煤的干基灰分测量不确定度的各分量进行分析,并对各分量的标准不确定度进行计算和合成.通过比较各分量的标准不确定度,得出了影响干基灰分测量不确定度的主要因素.     

块炭限下率检测结果的不确定度评定

根据GB/T 33303—2016 《煤质分析中测量不确定度评定指南》和MT/T 1—2007 《商品煤含矸率和限下率的测定方法》的相关规定,结合数学模型及不确定度分量的主要来源分析,从测量重复性引起的不确定(A类评定)、台秤称量所致的不确定度(B类评定)、合成标准不确定度的计算、扩展不确定度的确定、测量结果的表示等方面对不确定进行评定,即对批煤块炭进行限下率测定并对限下率测定全过程不确定度的各个分量进行分析、计算、合成,评定出块炭限下率的不确定度。     

Current situation and future trend of China rare earth luminescent materialindustry(continued)

<正>Developing ecological lighting source The world is facing the big problem of energy shortage today and the contradiction between economy development and environmental protection is worsened.Therefore,people are more likely to choose an ecological light source that is more energy efficient and environmental friendly.The choice provides great opportunity for the development of rare earth optical material industry in China.The concept of green lighting positions rare earth luminescent material as a leading player in illumination market.The light source of both rare earth luminescent lamp and LED lamp is ecological and energy saving.This is why     

Galaxy Magnets achieved the net profit of 34.02 million yuan in the first six months of 2014

正Galaxy Magnet announced its financial results for the first half of 2014 on August 14.For the first six months ended on 30 June 2014,Galaxy Magnet achieved operation income of RMB 182.3 million,up8.40% over the same period of 2013,and the net profit attributable to the shareholders of the listed company of 34.02 million yuan,increasing 35.49% over the same period of last year.Stable performance increase was led by development of new customers and application market of magnets.     

Rare Earth Application in Steel in China

<正>China has rich rare earth resources.Output of rare earth and steel in China ranks the top first in the world.However,there is still certain distance between the steel produced in China and developed countries from the point of varieties and quality.China still has to import some types of steel.Improving the quality should be emphasiZed in future development of steel industry in China.Rare earth can be used to upgrade traditional steel     

China rare earth market review

正November 21~30,2014Due to weak demand from downstream industries,transactions of rare earth in Chinese domestic market were inactive.It was difficult to sell any rare earth products except for dysprosium oxide and terbium oxide.Suppliers lost confidence in recent market.Demand for rare earth products was soft.Consumers continued to take a wait-and-see attitude.Rare earth export market remained slow.     

稀散金属产业的观察与思考

分析了近年来国内外稀散金属产业的生产、应用、资源与市场状况.铟锡氧化物靶材、砷化镓晶片、锗红外材料、铼高温合金和硒在电解锰及玻璃的应用等已成为稀散金属的主要应用领域.稀散金属的产量快速增长达到历史高位而导致了市场的失衡.以GaInP_2/GaAs/Ge,CIGS和CdTe为代表的非硅系太阳能电池是稀散金属的新兴应用领域,将给稀散金属带来日益增长的需求.     

Current situation and future trend of China rare earth luminescent material industry

<正>Rare earth luminescent material is one of the most important application sectors of rare earths.China enjoys the exceptional advantage to develop rare earth luminescent material for its abundant rare earth resources.After several decades'endeavor,China's rare earth luminescent material industry,headed by rare earth phosphor for lamp and LED and high efficient rare earth energy-saving light source,has been gradually developed into a scale industry.China has become a major production base of rare earth phosphor for lamps and rare earth     

China rare earth market review

正June 1~10,2014Rare earth market remained weak.Quoted price of rare earth products was similar to that in May.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,polishing powder and ceramic industries remained inactive.Demand from downstream industry was soft.Consumers purchased on their needs.Suppliers had strong intention to sell.Prices of rare earth products     

Annual Report analysis of Chinese rare earth-related listed companies in 2013

<正>Chinese rare earth-related listed companies have published their 2013 annual reports.It can be understood from their reports that production and operation activities of Chinese rare earth-related companies were still heavily affected by macro economy and industrial policies.They basically followed the steps of national economy.In 2013,world economy recovered slowly but the economy     

Market opportunities and challenges for rare earth polishing powder

正1.Status of rare earth polishing powder Rare earth polishing powder with high content of cerium oxide began to replace iron oxide for glass polishing and became one of the key materials in glass polishing process since 1940.Compared with traditional iron oxide,rare earth polishing powder has many advantages,such as fast polishing rate,high polishing quality and long service life.It can achieve good surface quality and improve operation conditions.For example,in lens polishing,the polishing work that cerium     

Baotou Research Institute of Rare Earths developed a new RE alloy preparation technology

正Pyrometallurgy Laboratory of Baotou Research Institute of Rare Earths had independently developed a new preparation technology of rare earth alloy for NdFeB.The alloy can remarkably enhance the coercivity of NdFeB magnet but also evidently reduce the production cost of the magnet.The new master alloy was prepared in the kA pilot-scale electrolytic cell by the independent technology.The rare earth master alloy can be used as the raw material for NdFeB.Compared