简介：本文针对我省部分地方小煤矿两回路供电电源电压等级不一致，即采用6KV和10KV结线和切换电源提出了几种方案，供使用参考。

简介：本文对通讯电缆割接前、割接中、割接后需要注意的几个关键性问题进行了论述。

简介：Source:MITTechnologyntroductionNotallbreakthroughsarecreatedequal.Somearrivemoreorlessasusablethings;othersmainlysetthestageforinnovationsthatemergelater,andwehavetoestimatewhenthatwillbe.Butwe’dbetthateveryoneofthemilestonesonthislistwillbeworthfollowinginthecomingyears.1.MagicLeap

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简介：2015TopTenRareEarthScienceandTechnologyNewshasbeenrevealedbyChinaRareEarthInformationCenter,NationalInformationNetworkandthemediaof'RareEarthInformation','ChineseRareEarths','ChinaRareEarthInformation'andChinaRareEarthNet.Thetoptenrareearthscienceandtechnologynewsareselectedfrommorethan100rareearthscienceandtechnologynewsreportedbythe

简介：OrganizedbyChinaRareEarthInformationCenterandNationalRareEarthInformationNetworkandco-sponsoredbyInformationSpecialtyCommitteeofChinaRareEarthSociety,TechnologyandEconomySpecialtyCommitteeofChinaRareEarthSociety,NorthernRareEarthIndustryProductivityPromotionCenteraswellasmediaincluding'RareEarth

简介：1.ManagementtotheInvestmentinRareEarthIndustryConfirmedInJuly2004,"DecisionontheReforminInvestmentSystem"wasformallypublicizedbytheStateCouncilofthePeople'sRepublicofChina.ThefifthitemintheDecisionstipulatesthatoreexploitation,smelting&separationandrareearthdeep-processedprojectswithtotalinvestmentoverRMB￥100millionshouldbeapprovedbytheinvestmentgoverningdepartmentoftheStateCouncil,andthatother

简介：7.ChinesescientistsindependentlydevelopedthecosteffectiveLa-Fe-BserieshydrogenstoragematerialsAftermorethanfouryearsefforts,hydrogenstorageresearchteaminBaotouResearchInstituteofRareEarthshaddevelopedLa_(15)Fe_(77)B_8,La_(17)Fe_(76)B_7andLa_8Fe_(27)B_(24)serieshydrogenstoragealloys,whichhavethemultiphasestructureincludingLaNi_5phase,

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简介：6."Developmentofhigh-performancerareearthluminescentmaterialforwhiteLED"projectbyFujianInstituteofResearchontheStructureofMatter(FJIRSM)passedtheacceptance"Developmentofhigh-performancerareearthluminescentmaterialforwhiteLED",akeyspecificS&TsubjectinFujianprovince,ledbyFujianInstituteofResearchontheStructureofMatter(FJIRSM)passedtheexpertsacceptanceonJanuary29,2015.

简介：OrganizedbvChinaRareEarthInformationCenterandNationalRareEarthInformationNetworkandco-sponsoredbyInformationSpecialtyCommitteeofChinaRareEarthSociety,TechnologyandEconomySpecialtyCommitteeofChinaRareEarthSociety,NorthernRareEarthIndustryPromotionCenteras

简介：PriceofrareearthsindomesticmarketwasbriskinMay.PricesofPrNdoxideandPrNdmischmetalkeptarisingtendency.Manypersonstookapositiveattitudetowardthetrend.ItwassaidthatsomedealershadstartedtostockupREoxides.

简介：ＷＩＬＤ─Ａ１０仪投影器主付轴的校正游传金（武汉测绘院汉口）出厂编号ＮＯ：４０５４之后的ＷＩＬＤ－Ａ１０仪，投影器在ＸＺ平面内绕ＡＡ轴转动，称为绕主轴旋转；而投影器在ＹＺ平面内绕ＢＢ轴转动，定义为绕付轴旋转，（见图１）ＡＡ轴与ＢＢ轴理应精确交于一点，...

简介：介绍了用CorelDRAW数字化制图系统制作《1：10万枣庄市水利图》的基本过程，即准备工作、数字化、数据编辑、图形输出等；总结了制图过程作业中的经验和体会。

简介：介绍用辐射形式进行线路测量的全过程，并对不同测量方法的测量精度、工作效率进行比较分析。

简介：对接触器联锁正反转控制线路的原理进行了分析，阐述了接触器联锁正反转控制线路接线图的画法，并通过接线图进行实际操作。

简介：铁路通讯系统以其特有的行业特点,对地理信息和相应的软件平台的需求尤为突出.针对这种特点,讨论了通讯线路设计与维护GIS的设计思想、解决方案与基本功能.

简介：为了提高《电力拖动控制线路》的教学质量，该文分析了课程特点，认为须在理论教学、实验实习，总结提高等几个方面改进教学方法，使学生在掌握理论知识的基础上，不断提高实践能力，培养自学能力。

简介：WILD-A10仪带地球曲率自动改正装置的77点方格网量测精度有时很低，达不到0．05‰。其原因是地球曲率自动改正装置机械部分有故障。因此，不但应对地球曲率自动改正装置进行通常的三项检校，还应补充地球曲率自动改正装置的触头与地球曲率自动改正板吻合性检校。

简介：Oracle10g的Spatial模块提供了空间操作,这些空间操作划分为可直接调用空间操作和间接调用的空间操作,基于OO4O实现这些空间操作,并将结果保存,再由MapX从保存的结果中获取分析数据作进一步处理,从而增强开发系统的的空间操作能力.