简介:ThispapermainlydiscussestheproblemsexistinginthetraditionaldesignprocessoftherefrigerationstationandtriestosolvethemwithBIMtechnology.ConsideringthecharacteristicsofBIMtechnology,BIMdesignprocessispresentedbasedonthetraditionaldesignprocesstoachievethegoalofimprovingdesignqualityandefficiency.
简介:Basedonthecavestrainobservationdatain2013atTaianseismicstation,weusetheVenedikovharmonicanalysismethodtocalculatethecavestrainmeasurementandphaselagofthetidefactor,andqualitativelyevaluatethestabilityofthetidalfactorforobservationaldataevaluation.Atthesametime,thetwomeasurementitemsoftheobservationinstrumentarecalculated,andthecorrelationstrainparametersareextractedandcompared.Onthisbasis,thestrainparametertimeseriescalculationiscarriedoutonthedataqualityofTaianseismicstation,whichisrelativelystable,andthe2setsofinstrumentsarecompared.Throughtheanalysis,itisfoundthatthestressfieldisabnormal,andthecorrespondingrelationshipbetweentheanomalyofthestressfieldandthegravityfieldiscomparedandanalyzed
简介:摘要本文主要从TD-LTE整体介绍;特点;移动TD-LTEVOLTE的MOS值优化等方面进而讨论了TD-LTE时代行之有效的网络优化。
简介:ThisstudyinvestigatedtheflowcharacteristicsalteredbyJangBogoAntarcticResearchStationusingcomputationalfluiddynamics(CFD)modeling.ThetopographyandbuildingsaroundJangBogoStationwereconstructedwithcomputeraided-designdataintheCFDmodeldomain.Wesimulated16caseswithdifferentinflowdirections,andcomparedtheflowcharacteristicswithandwithoutJangBogoStationforeachinflowdirection.Thewinddatarecordedbythesite’sautomaticweatherstation(AWS)wereusedforcomparison.WindroseanalysisshowedthatthewindspeedanddirectionaftertheconstructionofJangBogoStationwerequitedifferentfromthosebeforeconstruction.Wealsoinvestigatedhowvirtualwindfenceswouldmodifytheflowpatterns,changingthedistanceofthefencefromthestationaswellastheporosityofthefence.Forwesterlyinflows,whentheAWSwasdownwindofJangBogoStation,thedecreaseinwindspeedwasmaximized(-81%forwest-northwesterly).ThewindspeedreductionwasalsogreaterasthedistanceofthefencewasclosertoJangBogoStation.Withthesamedistance,thefencewithmediumporosity(25%–33%)maximizedthewindspeedreduction.Theseresultssuggestthatthelocationandmaterialofthewindfenceshouldbeselectedcarefully,orAWSdatashouldbeinterpretedcautiously,forparticularprevailingwinddirections.