高精度电子准仪在城市高层建筑物沉降观测中的应用

简述对城市高层建筑物进行变形监测的意义,介绍了ＮＡ３０００电子水准仪的功能,阐述某高层建筑物沉降观测基准点和沉降点的布设和观测方案、沉降观测的数据处理与成果管理,并对高层建筑物沉降进行了简单的变形分析。     

基于MATLAB自动生成建筑沉降监测图表

沉降监测成果表和时间-荷载-沉降量曲线能直观反映建筑物沉降情况,便于进行变形分析、预报,提交上述成果是沉降监测的主要环节.文中利用MATLAB语言来读取平差文件,并结合Microsoft Excel软件实现图表自动生成,提高了工作效率.     

国土调查数据可视化管理平台设计研究

以GIS技术和大数据可视化技术为基础,设计开发了一个国土调查数据可视化管理平台,分别从数据体系建设、系统平台架构、图表和地图可视化3个方面对管理平台进行分析研究,通过将调查数据进行资产化处理,构建规范化、标准化数据体系,同时结合多类型专业数据图表以及可视化专题地图对国土调查数据成果进行直观呈现。该平台在某市国土调查数据管理项目中取得了较为理想的应用效果,借助数据成果大屏展示、可视化专题地图、分析报告自动生成等模块,大大提升了区域国土调查数据管理水平,同时为国土调查数据成果的共享共用提供了较为可靠的解决思路。     

江苏谏壁发电厂沉降监测方法和资料分析

沉降监测是保证重点工程安全长期运营的基础性工作。以长江岸边易发生地基沉降的江苏谏壁发电厂为监测对象,介绍了该发电厂厂房、码头、循泵房和烟囱等关键构筑物沉降监测方法;提出了提高监测精度的手段;以监测数据的分析结果为基础,得出了各构筑物的沉降情况;总结了在关键构筑物监测过程中应注意的问题。上述成果对地基易发生沉降地区重点工程的沉降监测具有重要的借鉴、指导作用。     

建筑沉降监测方法及实践

建筑沉降监测是确保建筑施工和安全使用的重要工作。文中详细分析了导致建筑沉降的因素和沉降类型,阐述了沉降监测的基本方法步骤,通过实践成果对沉降监测工作进行探讨。     

矿井水文动态监测信息可视化系统的开发

在东欢坨矿区水文动态监测信息获取的基础上,运用软件工程的思想,结合组件式开发模式和地理信息组件模型,利用Visual Studio.net的可视化开发工具,开发了较完整的服务于东欢坨矿区的水文监测信息动态可视化系统。该系统将矿井水文监测的所有数据以及矿井环境进行统一整理、合理划分,具备地图查询、三维地图控制、空间分析、钻孔管理、数据输出等功能,满足有关矿井水文信息的集成化、三维可视化的要求,能够对安全第一的生产原则提供快速可信的技术支持。     

PSI技术在北京城区地表沉降形变监测中的应用研究

针对DIn SAR技术中时间、空间失相关及大气延迟等问题引起的In SAR技术对地表沉陷变形监测的影响,研究了应用永久散射体差分干涉测量(PSI)技术特点及在地面沉陷变形监测应用中的优势,通过利用PSI技术对北京地区进行地表沉降监测方法的研究和应用,获得了监测区大量PS点的沉降速率,生成了监测区的沉降位移图,结合监测区的地表沉降特征与地质环境监测成果,分析了地下水位与沉降量变化的关系,得出了研究期间监测区域地表的沉降成因,这对分析北京地区地表沉降规律具有一定的指导意义。     

矿山开采区沉降现状监测与发展趋势分析

对矿山开采区进行阶段性的沉降现状监测,是保障矿山长期开采的必要措施.文中以山东境内某矿山开采区的部分矿区为例,进行沉降现状监测,采取了包括高程网监测和基于D-InSAR的卫星监测两种方法进行三期/两年的长期监测,对监测结果进行综合分析,评价该区现状,对水准成果与D-InSAR成果进行一致符合性评价,并基于数据融合给出该...     

基于GIS的采矿迹地固体废弃物的综合监测研究

矿山企业采矿迹地固体废弃物综合利用与环境监测是矿山持续稳定发展的重点内容之一。利用GIS和RS技术的优势,从宏观监测和微观分析的角度构建了采矿迹地固体废弃物综合监测模型,并且利用COMGIS技术,开发了采矿迹地固体废弃物综合监测GIS系统。系统以河北钢铁集团矿区的尾矿、排土场、选矿场的遥感影像、尾矿样的实验分析数据为基础信息,实现了固体废弃物管理的遥感影像特征与属性图表结合的可视化管理和多区域固体废弃物数据定性或定量对比分析,为尾矿资源环境监测与开发利用提供了技术支撑。     

矿井通风网络可视化研究

以徐州某矿为例,针对矿井通风系统特点,以AutoCAD为开发平台,运用VBA二次开发和VB高级程序语言对矿井通风系统进行可视化程序设计.通风系统属性数据采用数据库存储,利用面向对象编程的思想,对数据库指针对象进行封装,达到数据库和图形无缝连接,开发实现了矿井巷道可视化以及在此基础上的瓦斯流监测可视化软件(局域网版).建立了图形与数据库相关联的系统,实现了矿井通风系统图形数据的网络可视化管理.     

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