阜蒙县测量控制点保存现状与思考

文中通过比较分析最近两次测量控制点普查成果,指出控制点破坏的主要因素以及测量主管部门对现状和今后应注意的一些问题,并提出了控制点普查和保护的建议。     

关于蓟县测量标志的调查报告

介绍了蓟县测量标志的保存与利用现状.通过分析该县测量标志管理制度的缺陷,总结了造成测量标志毁损的原因,在此基础上,提出了加强测量标志保护的8条措施.     

测量标志管理与保护中存在的问题和对策

介绍了测量标志保护、管理工作的现状及测量标志管理工作亟待解决的问题。     

做好通辽市测量标志保护工作的探讨

介绍什么是测量标志,测量标志的重要性以及内蒙古通辽市测量标志保护工作的情况     

马钢测量控制点成果管理系统设计

为适应马钢总图管理系统的需要,马钢测量控制点成果的管理需要在时效性、准确性等方面提高和完善。针对这一需求,开发了一套管理科学、使用简单方便的测量控制点管理系统。系统从测量控制点管理的实际工作出发,符合国家册立标志保护条例及测绘成果管理标准规范的有关规定。系统将GIS技术应用于测量控制点管理,解决了长期以来控制点管理散乱等问题,最大限度地实现了数据资源共享,完善了总图管理的范围,为测绘工作提供了极大的便利。     

马钢测量控制点成果管理系统设计

为适应马钢总图管理系统的需要,马钢测量控制点成果的管理需要在时效性、准确性等方面提高和完善。针对这一需求,开发了一套管理科学、使用简单方便的测量控制点管理系统。系统从测量控制点管理的实际工作出发,符合国家册立标志保护条例及测绘成果管理标准规范的有关规定。系统将GIS技术应用于测量控制点管理,解决了长期以来控制点管理散乱等问题,最大限度地实现了数据资源共享,完善了总图管理的范围,为测绘工作提供了极大的便利。     

甘肃省测量标志普查维护研究

针对测量标志普查维护工作的开展,利用试点进行分析研究,从测量标志的分类保护、普查、维护、入库、宣传和巡查、托管机制等各项环节,详细阐述了省级测量标志普查维护项目的技术路线和作业流程,以期为类似测量标志普查维护工作提供借鉴。     

煤炭自燃预报模型校正的理论与方法

首次提出煤炭自燃预报模型的校正理论与方法.标志气体初始出现的煤温称为标志煤温,二者的对应关系是建立校正方法的基础.根据三点定曲线的原理,校正预报模型涉及的标志气体不应少于3种,标志煤温在＜100℃、100～200℃和300℃左右都应有分布.一段式预报模型的校正,主要是检验与修正各个标志煤温点参数的符合性;分段式预报模型的校正,通常需要用插入中间点的方式改善预报曲线的形态.校正参数取自现场气样分析结果,校正过程综舍考虑了自燃地点、漏风等因素的影响,校正后的预报模型可最大限度地减小预报误差.实例详细地介绍了校正方法的应用情况.     

采煤工作面煤自燃标志气体CO的临界值研究

为确定采煤工作面自燃标志气体的临界值,通过程序升温实验测定不同温度及漏风条件下,煤氧化产生CO的变化规律,进而确定实验条件下指标气体的临界值。建立了据实验结果推算实际条件下煤氧化产生标志气体浓度的数学模型,据此确定实际指标气体的临界值随漏风强度的变化规律。本文以长城六矿3号煤层工作面为研究对象,确定了标志气体CO临界值为63×10^-6,与实验值基本吻合,该研究成果对现场防灭火工作起到重要指导作用。     

视错动正、逆断层的划分标志和表现特征

阐明了视错动正、逆断层的涵义与划分标志 ,分析了断层与煤 (岩 )层的不同产状交切关系下视错动正、逆断层的表现特征。     

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     

Market and recycling of NiMH battery

<正>Market status and future trend of NiMH battery1.Global market of small NiMH battery Global market size of small NiMH batteries declined year on year since 2011.The trend will continue to 2018,at the rate of 5%to 10%annually.Demand for small NiMH batteries will be stable gradually.Many electrical apparatuses are powered by the built-in lithium battery today,which is the main reason for the shrunk market of small NiMH batteries.But,for some products,small NiMH     

China rare earth market review

正September 1-10,2014 Affected by the National Day holiday,rare earth transaction was stagnant and the market showed a weak steady state.As there was no good news for downstream market,some products with flat demand would likely rally slightly for some time to     

2014 second batch of rare earth quota released

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矿用防爆轴流对旋主要通风机叶片ANSYS模态分析及应用

高效节能矿用防爆对旋主要通风机的叶片是主要通风机运行的关键部件,叶片在运行时不断受到气流的作用力,从而使叶片产生振动,当叶片振动的频率与叶片的固有频率接近时,容易产生共振从而导致叶片的断裂。一旦叶片断裂时,对主要通风机的安全运行产生致命的影响,从而导致矿山、化工等企业发生重大事故,将会产生不可估量的损失。基于有限元分析软件ANSYS,对高效节能矿用防爆轴流对旋主要通风机叶片进行模态分析及产生对应的六阶模态频率,对主要通风机叶片的运行频率、固有频率及产生的共振问题进行了原理分析,并且解决了叶片频率共振的问题,从而为主要通风机叶片结构设计提供理论依据,并对主要通风机叶片的安全运行提供保障。     

2013 NdFeB export analysis

<正>China totally exported nearly 24,000 tonsof NdFeB products during 201 3,including 18,825 tons of permanent magnet,valued USD 1.34 billion at an average price of 71.4 USD/kg;3,277 tons of NdFeB magnetic powder,valued USD 1 01 million at an average price of 30.9 USD/kg;1,334 tons of strip casting ribbon,with total export value of USD 74million at an average price of 55.3 USD/kg;and 586