厦门市1∶5000比例尺3D产品的生产

简述了厦门市1∶5 000比例尺数字地形图DLG、数字正射影像图DOM、数字高程模型DEM(简称3D)产品生产的全过程;论述了3D产品生产过程中的作业标准、作业方法、关键技术及精度分析,并对3D产品的生产方法进行了讨论。     

航测内业流程集群化处理技术的应用研究

结合实际的生产,充分利用现有的软硬件设备,引进目前国内先进技术,优化作业流程,提高生产效率。采用集群化处理技术,进行改进甘肃省测绘工程院航测内业常规生产流程研究,提高DEM、DOM产品的生产效率、降低人员投入和劳动强度、缩短作业周期,提升甘肃省测绘工程院3D产品的生产与服务能力。     

浅谈全数字摄影测量系统的生产流程及技术要点

阐述了利用JX-4全数字摄影测量工作站制作3D产品的生产流程,并结合生产实践,对生产过程中的定向建模、矢量测图、DEM编辑与创建、DOM参数设置、数据导出等进行了讨论.     

某铝土矿山大比例尺低空无人机航测3D产品质量检查与应用

针对某铝土矿山120 km~2区域1∶2 000低空无人机航测作业,提出利用DATmatric软件获取刺点坐标和通过GPS获取实测坐标进行对比分析的3D产品质量检查的实施步骤。重点阐述了3D产品质量检查的位置精度评定(地物点对邻近控制点的平面位置中误差和高程中误差)标准及方法,最后对低空无人机航测数字产品质量进行了分析和评定,得出本次无人机航测数字产品质量检查满足3D产品质量检查精度要求。     

数字线划图生产辅助系统

数字线划图(DLG)是数字制图中的基础产品,在其数据生产过程中,传统的图幅分发和进度跟踪方式繁琐低效。针对实际生产中存在的问题,开发了DLG生产辅助系统,实现了对作业图幅的便捷管理,解决了具体生产中的若干问题,提高了作业效率。     

创新引领发展 交流促进合作——第四届科技场馆展品与技术设施国际展览会在北京展览馆举行,中国煤炭学会携5家煤炭行业“全国科普教育基地”首次亮相展览会

为贯彻落实党的十八大对科普工作提出的新要求和中长期目标,促进中国特色现代科技馆体系的建立形成,中国科学技术协会于2013年7月18～20日在北京展览馆主办了"第四届科技场馆展品与技术设施国际展览会"。展会展出面积为1万多平方米,来自全国的自然学科类科技场馆、科普教育基地、各行业学会和国内生产科普产品、展品的企业近90家单位参加了展览,展览集中展示了网络多媒体、立体模型和实景、互动设施、智能产品、3D和4D影视技术、数字和虚拟现实技术、展品配备和制作、物流网教育产品、软件开发以及出版业科普产品等     

数字脉冲脱磁器的试验与应用

随着钢铁工业的持续稳定发展和社会主义市场经济的要求，选矿业不但要生产高质量的铁精矿产品，而且还必须使铁的回收率达到较高的水平。多年来脱磁器脱磁效果不佳一直困扰着细筛作业、磁选作业、闭路磨矿一分级作业、脱水作业等分选效果和分级效率的提高。东北大学针对上述情况研制一种新型数字脉冲脱磁器并和南芬选矿厂一起在三选车间开展了工业试验，试图对影响最终产品粒度的二次分级机的给矿进行考查。考查结果表明，数字脉冲脱磁器经脱磁后，一250目产率比我厂应用的工频脱磁一250目的产率平均提高2．3％，并获得节能降耗的显著效果，…     

基于Rhino3D NURBS的FLAC~(3D)快速建模方法在露天边坡问题中的应用

为弥补FLAC3D软件前处理功能薄弱的缺点,介绍一种基于Rhino3D NURBS的FLAC3D快速建模方法,并以黑岱沟露天矿拉斗铲作业站立台阶边坡问题为实例,通过KUBRIX插件实现了Rhino3D模型与FLAC3D软件的完美对接,结果验证了该建模方法的可行性和实用性。     

全数字摄影测量的生产流程及技术要点

阐述了利用JX4A全数字摄影测量工作站制作4D产品的生产流程，并结合生产实践，对生产过程中的定向建模、影像裁切、DEM编辑与创建、DOM参数设置、测图方案制定、数据导出等进行了讨论。     

应用数字航测技术测绘1: 500地籍图的几个问题探讨

对应用数字航测技术测绘1：500地籍图的作业特点、可行性、测图精度、航空摄影方案及内外业具体作业方法进行了探以作业实践说明,数字航测法地籍测量具有广阔的应用前景。     

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     

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     

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     

唐口煤矿深部复杂开采工作面瓦斯分源涌出规律研究

研究工作面瓦斯涌出规律对工作面瓦斯治理有重要意义。为了得到唐口煤矿深部3号煤层复杂开采条件下工作面回采时期瓦斯涌出时空演化规律,选取6304工作面作为对象,采用实测方法研究6304工作面瓦斯涌出规律。结果表明:6304工作面瓦斯涌出量为6.534 m³/min,其中煤壁占34.27%,落煤占29.62%,采空区占36.11%;沿工作面倾向由低到高,瓦斯浓度整体为上升趋势,其中1—76号架工作面瓦斯浓度小于0.20%,76—102号架瓦斯浓度上升明显,最大为0.387%;上隅角的后部采空区是工作面的瓦斯主要涌出源,上隅角1号测点瓦斯浓度0.78%,上隅角周边3号、5号、7号、8号、9号测点瓦斯浓度平均为0.643%;周期来压时,上隅角瓦斯相对平时较高。研究为针对性的瓦斯分源监控与灾害防治提供基础。