简介:干燥冷却的联合使用(DC)系统和奉献通风(DV)到decouple为精力效率冷却和除去湿气过程的系统为象香港一样的副热带的气候被建议。在这研究,DCDV系统的使用的精力性能和冷凝作用风险被在香港在一座典型办公大楼分析它的应用程序检验。通过用实际设备性能数据和现实主义的大楼和系统特征的hour-by-hour模拟,与DCDV系统的使用,年度精力消费能被54%与常规系统比较减少,这被发现(经常的空气体积与再热系统)。关于冷凝作用风险,DC卷上的冷凝作用的出现的年度频率是35h,这被发现。另外的模拟被进行在DCDV系统的冷凝作用风险上检验不同参数的影响。保证的措施在DC上没有冷凝物卷也被讨论。
简介:Differentfromconventionalmechanicalsystemswithsingledegreeoffreedom(DOF),themainideaofthesystemofhybrid-drivenprecisionpressistocombinethemotionofaconstantspeedmotorwithaservomotorviaatwo-DOFmechanismtoprovideflexibleoutput.Inordertomakethefeasibilityclear,thispaperstudiestheoreticallythedynamiccharacteristicsofthishybrid-drivenmechanicalsystem.Firstly,thedynamicsmodelofthewholeelectromechanicalsystemissetupbycombiningdynamicequationsofDCmotorswiththoseoftwo-DOFnine-barmechanismdeducedbytheLagrange′sformula.SecondlythroughthenumericalsolutionwiththefourthRunge-Kutta,computersimulationaboutthedynamicsisdone,whichshowsthatthedesignedandoptimizedhybrid-drivenprecisionpressisfeasibleintheory.Theseprovidetheoreticalbasisforlaterexperimentalresearch.
简介:Basedontheoperationdatafromacertainwastewatertreatmentplant(WWTP)innortheastChina,themodelsofbackpropagationneuralnetwork(BPNN)andradialbasisfunctionneuralnetwork(RBFNN)havebeendesignedrespectivelyandtheabilityofconvergenceandgeneralizationhasbeenanalyzedseparately.AsforBPNN,theeffectsofnumbersoflayersandnodeshavebeenstudied;asforRBFNN,theinfluencesofthenumberofnodesandtheRBF′swidthhavebeenstudied.ItisconcludedthatBPNNhasconvergedmuchslowlyincomparisonwithRBFNN.TheconclusionthattheRBFNNissuitableformodelingactivatedsludgesystemhasbeendrawn.AnautomaticallyoptimumdesignprogramforRBFNNhasbeendeveloped,throughwhichtheRBFNNmodeloftraditionalactivatedsludgesystemhasbeenestablished.
简介:煤炭医学教育研究会于1994年5月16~17日在河北省唐山市召开了成立大会,参加这次会议的有煤炭工业部卫生管理中心、煤炭各高等医学院校、中等卫生学校及华北煤炭医学院部分教学医院18个单位的代表共41人.华北煤炭医学院党政领导出席了开幕式,院长赵伯阳向大会致辞.大会期间与会代表对研究会的工作条例进行了认真细致的讨论,对研究会的领导机构及人选进行了充分协商,选举产生了由41位同志组成的医学教育研究会第一届委员会,并通过了研究会工作条例.煤炭医学教育研究会隶属中国煤炭教育协会高等教育分会.煤炭医学教育研究会第一届委员会组成人员如下:
简介:Avisualobject-orientedsoftwareforlanefollowingonintelligenthighwaysystem(IHS)isproposed.Accordingtoobject-orientedtheory,3typicaluserservicesofself-check,transferofhumandrivingandautomaticrunningandabnormalinformationinputfromthesensorsarechosenout.Inaddition,thefunctionsofreal-timedisplay,informationexchanginginterface,determinationandoperationinterweavinginthe3userservicesareseparatedinto5object-orientedclasses.Moreover,the5classesareorganizedinthevisualdevelopmentenvironment.Atlast,experimentalresultprovesthevalidityandreliabilityofthecontrolapplication.
简介:Inthispaper,ahybridadaptivecompensationcontrolschemeisproposedtocompensatethefrictionoccurrenceandothernonlineardisturbancefactorsthatexistinthehigh-precisionservosystem.Anadaptivecompensationcontrollerwithadual-observerstructureisdesigned,whiletheLuGredynamicfrictionmodelwithnon-uniformparametricuncertaintiescharacterizesthefrictiontorque.Consideringtheinfluenceoftheperiodicdisturbancetorqueandparametricuncertainties,fuzzysystemsandarobusttermareemployed.Inthisway,thewholesystemcanbetreatedasasimplelinearmodelafterbeingcompensated,thentheproportional-derivative(PD)controllawisappliedtoenhancingthecontrolperformance.OnthebasisofLyapunovstabilitytheory,theglobalstabilityandtheasymptoticconvergenceofthetrackingerrorareproved.Numericalsimulationsdemonstratethattheproposedschemehaspotentialstorestraintheimpactofdisturbanceandimprovingthetrackingperfor
简介:Amethodofmeasuringtheinteractionsinamultivariablecontrolsys-tem(MVCS)intimedomainisdefinedinthispaper.Anintelligentdecouplingcom-pensatorisdesignedintermsoftheconceptoffuzzycontrol,sothattheauto-tuningofcontrollers’parametersina2×2MVCScanbeturnedintothatoftwoindependentsingle-loopcontrolsystems(SLCS).Themethodpresentedinthepaperhassuccess-fullybeenusedinasimulationexperimentontheautomatictuningofacoordinatedcontrolsystem(CCS)inthedrum-boilerturbogeneratingunit(DBTU)andthesimu-lationresultsaxesatisfactory.
简介:Inthispaper,theproblemofParameterestimationinlineardelayedsystemsfromsampleddataistreated.Usingnumericalintegraloperation(NIO),anidentificationmodelwhichisparametrizeddirectlyinthelineardelayedsystempa-rametersisgot.Withtheleastsquare(LS)methodortheinstrumentalvariable(Ⅳ)method,therecursivealgorithmofparameterestimationisgiven.Theresultoftheillustratedexampleshowsthatthisalgorithmissimple,rapidandaccurrate.
简介:Anairsourceheatpumpsystem(ASHPS)usedinanofficebuildingissetupandstudiedexperimentally.Itsoperatingperformanceinwinterisevaluatedbasedontestdataandacomparativediscussionisgivenontheeffectofclimateconditionsandheatingloadratioontheoperationbehavior.Thenheatingcapacityvariationcausedbyevaporatorfrostingisanalyzedaswell.Finally,thedefrostingparametersandthetechnicalfeasibilityarestudiedforaconstantheatingdemand.TheexperimentalresultsindicatethatboththeoutletwatertemperaturedropandthesystemCOPshouldbetakenintoaccountwhensettingdefrostingparameters,andASHPSisaviabletechnologyforspaceheatingandhot-waterproductioninwinterinTianjin,whichcanmaintaintheroomtemperatureabove19℃whentheoutdoortemperatureis-2℃.