简介:摘 要:本文介绍了专利检索时CPC分类号在实际审查中的应用,通过具体案例的分析,对比了使用CPC分类号与IC分类号在中文库、外文库的检索效率,以期给审查员提供一种便捷的检索思路。
简介:NorthwestElectricPowerDesignInstitute(NWEPDI)wasestablishedin1956.Theinstituteundertakestheengineeringexploration,surveyanddesignofthermalelectricpowerplant,conventionalislandofnuclearpowerplant,powertransmissionandsubstationprojects,designofthe1stand2ndclasspressurevessels,electricpowersystemplanning,environmentalprotectionengineeringmonitoring,assessmentanddesign,variousindustrialandcivilarchitecturaldesignandthescicntificresearchandtechnicaldevelopmenttasksofcorrespondingspecialities.Theinstituteis
简介:ObjectivesandbenefitsoftheprojectFloodcontrolTheThreeGorgesProject(TGP)isakeyprojecttotheharnessinganddevelopmentoftheYangtzeRiver.ThedamsiteislocatedatSandouping
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简介:1.IntroductionNorthwest-andNorth-Chinaarerichincoalresources,buttheclimateoftheseregionsissemi-aridandshortofwaterresources.Forthisreason,therecirculatingwatersupplysystemsarepre-dominantlyutilizedinfossilpowerplants.Thenaturaldraftcoolingtowersaregenerallyselectedfortheserecirculatingsystems.Ac-cordingtostatisticsabout50%ofthethermalpowerplantsinChinaareequippedwithnaturaldraftcoolingtowers.Thecoolingtowerswithcast-in-placereinforcedconcretehyperboloidalshellarepreferablyadoptedinChina,becauseofthenot-too-severeclimateinwinter,thelowearthquakeintensitiesand
简介:摘要分析了传统的弯曲模具成型产生擦伤原因,设计了一种新的滚轴式弯曲模具,介绍了模具的工作过程和设计要点。该模具主要以转动为主,与零件表面几乎无相对滑动,因此能达到很好的外观要求。
简介:AccordingaleadingpersonofChinaInstituteofAtomicEnergy(CIAE),thefirstexperimentalfastneutronreactorunderconstructionwiththermalpowerof65MWisproceedingsmoothly,andtheconstructiondesignhasbeenfinishedcompletely.ItisexpectedthatthereactorwillbefinishedandgocriticalinSeptember2009,andgenerateelectricityontrialinSeptember2010.
简介:摘要煤矿中的采空区需要好好管理,否则会造成煤矿塌陷等问题。在煤矿采煤的过程中会有一定量的瓦斯在通风采空区聚集,U型的通风采空区聚集的瓦斯会更多。这些瓦斯在会附着在岩石层上,当通风采空区的压力或者温度改变时,未经处理的瓦斯会造成爆炸,严重时会给煤矿带去很多的损失,研究通风采空区瓦斯治理技术是综合治理煤矿瓦斯的重要方向。
简介:Inourearlierpaper,powersystemstabilizers(PSSs)aredesignedforanine-machinesystem,anewpole-placementtech-niqueisdevelopedforthedesign,andparticipationfactorsareusedtodecidehowmanystabilizersarerequiredandwheretheyshallbe.Eachmachinebeingrepresentedbyalow-orderlinearmodel,thereissomereservationoftheresults.Inthispaper,extensivetransientsimulationsareperformedandeachmachineisrepresentedbyahigh-ordernonlinearmodel.Coherentgroupsarefound.Aweightedspeeddeviationindex(SDI)isdefinedtofindoutthemostunstablemachinesinthesystem.PSSsaredesignedafterthedecisionsofPSSnumberandsites.Transientsimulationsarecarriedoutagainfortheclosed-loopsystem.Asystemstabilityindex(SSI)isusedtoevaluatethestabilityoftheclosed-loopsystem.ItisfoundthatthreePSSsaresufficienttoensurethestabilityofthenine-machinesystem.