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简介：TointroducethetechnologyofAustraliacontainerizedSHPstation,inMarch2005,adelegationof4HRCengineersvisitedAustraliancontainerizedSHPstationsandotherthreeconventionalSHPplantswiththeaccompanyofTycoTamar.Thesestations,nomatterinthedesignofpowerhouse,mainequipmentorauxiliaries,differsignificantlyfromthoseonesinChina.Here,abriefingispresentedasfollows.

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简介：OnDecember25,2000,thelastgeneratingunitinTianshengqiaoIHydropowerStationcompleted72hoursoftrialoperationinparallelwithpowernetwork.UPtothisday,thegeneratingunitsinthisstationhadbeencompletelybuiltupandputintooperation.ThetotalinstalledcapacityofTianshengqia

简介：Inamedium-termelectricitymarket,inordertoreducetherisksofpriceandinflowuncertainties,thecascadehydropowerstationsmayusetheoptionscontractwithelectricitysupplycompanies.Aprofit-basedmodelforriskmanagementofcascadehydropowerstationsinthemedium-termelectricitymarketispresented.Theobjectivefunctionisprofitmaximizationofcascadehydropowerstations.Inordertoavoidtherisksofpriceandinflowuncertainties,twodifferentrisk-aversionconstraints:aminimum...

简介：Real-timekinematicGPSprecisepositioninghasbeenplayinganincreasingroleinbothsurveyingandnavigation.Basedonthecity'sfibreLANnetwork,ShenzhenContinuousOperatingReferenceStations(SZCORS)systemhasbeenestablishedandconsistsofGPSreferencestations,systemcontrolcenter,user'sdatacenter,andreal-timedatacomnetwork.TheSZCORSsystemprovidesusersthereal-timecentimeterpositioningorpost-processingmillimeterpositioning.ThispapermakesdiscussiononthestructureofSZCORSsystem.Someexperimentshavebeenmadetotesttheusablity,andthenthedatahasbeenanalyzed.

简介：Theproblemofdistributedproportionalfairinter-cellfrequencyallocationforflat-structuredcellularsystemsisstudiedinthispaper.Wefirstlyproposeaframeworkofthefrequencyallocationinwhichthewholefrequencyallocationprocessisdecomposedintomanyconsecutivestages,thenidentifythatforeachstagethekeyistofindtheMaximumWeightIndependentSet(MWIS)inagivenweightedconflictgraphinthedistributedmanner.AnewdistributedalgorithmforMWISisdescribedinwhicheachnodeiterativelyexchangesmessageswithneighbors.WiththisdistributedMWISalgorithm,anewdistributedproportionalfairfrequencyallocationschemeispresented.TheperformanceoftheproposedalgorithmistestedincomputerexperimentssimulatingtheLongTermEvolution(LTE)cellularsystems.Simulationresultsshowtheperformanceoftheproposeddistributedproportionalfairfrequencyallocationschemeiscomparablewiththecentralizedones.

简介：Usingthedatasetof20±2secand(A/T)maxofsurfacewavesrecordedbyType-763andType-SKseismographsfromfivestationsinBeijingandelsewhere,themeansquaredeviationsuandrelativemeandeviationsDofMsvaluesdeterminedbyfivecalibrationfunctions(a,a763,a300aNandfromMsz(NEIS)arecomparedandanalyzed.Resultsshowthataanda763arerathergoodbetween20°and160°;anda763arerathergoodbetween10and30for20sec;a300isrelativelygoodbetween160and179.

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简介：MostofthehydropowerprojectsinSouthwestChinaandtheadjacentforeignregionswillbeputintooperationbetween2015and2020,whichwillbringsomedifficultiesforreasonableaccommodationanddeliveryofelectricenergy.Inthispapertheauthorstudiesthedevelopmentscale,developmentschedule,accommodationandtransmissionschemesofthecascadehydropowerstationsalongtheLancangRiverbasin,oneofthefivelargebasinsinChina,basedontheloadcharacteristicsofgridsatboththesendingendandthereceivingend,thestrategyofcomplementaryutilizationofthermalpowerandhydropower,theadvancedtransmissiontechnologies,andtheoptimaleconomicperformance.Thestudyresultsshowthat,thecascadehydropowerstationsontheupperreachesoftheLancangRiverinYunnanshouldmainlyserveGuangdongProvince,withproperplanningofpartlyservingYunnanProvinceduringdryseasons.ThetransmissionschemesshouldadoptUHVDC,UHVAC,andsingle-towerdouble-circuitedHVDCtransmissionschemeaccordingtothetransmissioncapacityanddistance.

简介：BasedonSwaverecordsofdeepteleseismsonDigitalSeismicNetworkofShanxiProvince,shearwavevelocitystructuresbeneath6stationswereobtainedbymeansofSwavewaveformfitting.Theresultshowsthatthecrustisthickinthestudiedregion,reaching40kminthicknessunder4stations.Thecrustallalternativeshighvelocitylayerwithlowvelocityone.Thereappearvariedvelocitystructuresfordifferentstations,andthestationsaroundthesametectonicregionexhibitsimilarstructurecharacteristics.Combinedwithdominantdepthdistributionofmanysmall-moderateearthquakes,thecorrelationbetweenseismogeniclayersandcrustalstructuresofhighandlowvelocitylayershasbeendiscussed.

简介：ＶＩＬＬＡＧＥＦＯＲＥＳＴＲＹＳＴＡＴＩＯＮＳＰＥＲＦＯＲＭＡＮＩＭＰＯＲＴＡＮＴＲＯＬＥＩＮＣＨＩＮＡ’ＳＳＯＣＩＡＬＦＯＲＥＳＴＲＹＤＥＶＥＬＯＰＭＥＮＴＢｙＺｈｕＴｕｅ；ＷａｎｇＬｉｐｉｎｇ；ＳｈｉＷｅｎｋａｉＴｈｅＲｅｌａｔｉｏｎｓｈｉｐＢｅ...

简介：DuringthegreatWenchuanearthquake,about460permanentfree-fieldstationsinNationalStrongMotionObservationNetworkSystem(NSMONS)ofChinacapturedthemainshockaccelerationrecords.Theserecordscanbeappliedtositeeffectanalyses,andthenthesiteclassificationofthosepermanentstationscanbecarriedoutfirstly,whichwillservedasthefundamentalinformationforfurtherresearch.Inthispaper,thesiteofnear-faultstationsisclassifiedbyhorizontal-to-verticalspectralratio(HVSR)methodaccordingtothesiteclassdescriptionofJapanearthquakeresistantdesigncodeandresponsespectralshapes(RSS)methodfollowingthesiteclassdescriptionofthe1997UniformBuildingCode(UBC)provisions.Thenbasedonthedetailedboreholedataofthosefree-fieldstations,theequivalentshearwavevelocityandoverburdenthicknessarecalculatedandthesiteclassificationsaregivenbyChinesecodeforseismicdesignofbuildings.Furthermore,forthestationshavingsuccessfulmicrotremortestdata,thesitedominantperiodsarecomputedtoverifytheresultsofsiteclassification.Finally,combinedwithalltheaboveresults,therecommendedsiteclassesofnear-faultpermanentfree-fieldstationsaregiven.

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