简介:AsoneofthevictoriousAlliesofWorldWarI,ChinaattendedtheParisPeaceConferencein1919.Toacertainextent,theconferencecanberegardedasthetruebeginningofglobalgovernance.ItwasfollowedbytheestablishmentoftheVersailles-WashingtonSystem,thefirstinternationalpatternwithworldparticipation.Althoughitwasinvolvedin
简介:基于实例分别在VisualBasic、VFP、HTML超文本、以及AUTHORWARE中阐述ActiveX控件的使用方法,充分展示其应用的广泛性与功能的强大性。
简介:Inanactivenetwork,userscaninsertcustomizedactivecodesintoactivenodestoexecute.Thusitneedsmoreresourcesthanthoserequiredbyconventionalnetworks,andtheseresourcesmustbeeffectivelymonitoredandmanaged.ManagementpoliciesinexistingOSsaretoocomplicatedtoapplytosimpleactivepackets.Inthispaper,wepresentnewresourcesmanagementpoliciesthataremainlyadopedtomanageCPU,storageandtransmissionbandwidth.Namely,weuseSPFalgorithmtoscheduleandprocessactivepackets,andimportanintervalqueuemethodtoallocatetransmissionbandwidth,andusefeedbackmechanismtocontrolcongestion.Atthesametime,wedesignsomeexperimentsonprototypesystemswithandwithoutresourcesmanagementpoliciesrespectively.Theexperimentsresultsshowthatmanagementpoliciespresentedbyuscaneffectivelymanageresourcesinactivenodesandcanimprovetheperformanceofactivenetworks.
简介:Thetectonicmovementathumanscalehasnotbeenfullyunderstoodyet,especiallyforactivetectonics,althoughitisthebasistostudynaturalhazardsandenvironmentalvariations.Manynationalandinternationalscientificplansrelatedcloselytoactivetectonicsresearchhavebeenmadeinthepasttenyears.Thispaperbrieflysummarizedthebackgroundoftheundertakingofactivetectonicsresearch,itsadvancesandexistingproblems,andthekeypointsinitsfuturestudiesarealsopointedout.TheemergingofnewtechnologiesliketheEarthObservingSystem,DigitalSeismologyandsoonprovidesunusualopportunitiesfortectonicresearch.Itisemphasized,however,thatcarefulanalysesandbuildingupofnewtheoreticalframearesillthekeyproblemsforstudiesofactivetectonics,especiallyforactivetectonicsinChina'scontinent.
简介:Insteadofvision,manynocturnalanimalsusealternativesensesfornavigationandobjectdetectionintheirdarkenvi-ronment.Forthispurpose,weaklyelectricmormyridfishemployactiveelectrolocation,duringwhichtheydischargeaspe-cializedelectricorganintheirtailwhichdischargeselectricalpulses.Eachdischargebuildsupanelectricalfieldaroundthefish,whichissensedbycutaneouselectroreceptororgansthataredistributedovermostofthebodysurfaceofthefish.Nearbyobjectsdistortthiselectricalfieldandcausealocalalterationincurrentflowinthoseelectroreceptorsthatareclosesttotheobject.Byconstantlymonitoringresponsesofitselectroreceptororgans,afishcandetect,localize,andidentifyenvironmentalobjects.Inspiredbytheremarkablecapabilitiesofweaklyelectricfishindetectingandrecognizingobjects,wedesignedtechnicalsensorsystemsthatcansolvesimilarproblemsofremoteobjectsensing.Weappliedtheprinciplesofactiveelectrolocationtotechnicalsystemsbybuildingdevicesthatproduceelectricalcurrentpulsesinaconductingmedium(waterorionizedgases)andsimultaneouslysenselocalcurrentdensity.Dependingonthespecifictaskasensorwasdesignedfordevicescould(i)detectanobject,(ii)localizeitinspace,(iii)determineitsdistance,and(iv)measurepropertiessuchasmaterialproperties,thickness,ormaterialfaults.Oursystemsprovedtoberelativelyinsensitivetoenvironmentaldisturbancessuchasheat,pressure,orturbidity.Theyhaveawiderangeofapplicationsincludingmaterialidentification,qualitycontrol,non-contactdistancemeasurements,medicalapplicationsandmanymore.Despitetheirastonishingcapacities,oursensorsstilllagfarbehindwhatelectricfishareabletoachieveduringactiveelectrolocation.Theunderstandingoftheneuralprinciplesgoverningelectricfishsensoryphysi-ologyandthecorrespondingoptimizationofoursensorstosolvecertaintechnicaltasksthereforeremainongoinggoalsofourresearc
简介:SimulationoftheactiveandquietperiodsofseismicityZHONG-XMNHUANG(黄忠贤)(InstituteofCrustalDynamics,StateSeismologicalBureau,Beiji...
简介:Inthispaper,theactivelearningmechanismisproposedtobeusedinclassifiersystemstocopewithcomplexproblems:anintelligentagentleavesitsownsignalsintheenvironmentandlatercollectsandemploysthemtoassistitslearningprocess.Principlesandcomponentsofthemechanismareoutlined,followedbytheintroductionofitspreliminaryimplementationinanactualsystem.Anexperimentwittesysteminadynamicproblemisthenintroduced,togetherwithdiscussionsoveritsresults.Thepaperisconcludedbypointingoutsomepossibleimprovementsthatcanbemadetotheproposedframework.
简介:IntroductionInChina,itisnotuncommonforstudentstobetreatedaspassiverecipientsinclass.Theyaretrainedinthiswayfromprimaryschool.Sobythetimetheyentercollege,notonlyaretheyaccustomedtotheroleofsubmissivestudentfollowingtheleadofadominantteacher,buttheyalsoquitewelcomeit,fortheydon’thavetotakeanyinitiativeinclass,theyjustwaittobefilledwithknowledge.Students’hesitancytoparticipateactivelyinclasscomesnotjustfromstudentsthemselvesbutalsofromsometeachers,whosticktotheforce-feedingmethodbecauseitisaneasywayforthemtoconductaclass.SoIstartedtotryandchangethissituation.IdesignedateachingplaninwhichIuseddifferenttechniquestoprovidethestudentswithlotsofopportunitiestobeactiveparticipantsinclass.Someofthetechniquesusedaredescribedbelow.
简介:Morethan40%ofnewlydiscovereddrugshavelittleornowatersolubilitywhichpresentsaseriouschallengetothesuccessfuldevelopmentandcommercializationofnewdrugsinthepharmaceuticalindustry.Additionally,morethan90%ofdrugsapprovedsince1995havepoorsolubility,poorpermeability,orboth.Therefore,itmaybenecessarytoincreasethedoseofapoorlysolubledrugtoobtaintherequiredefficacywhichcanleadtomoresideeffectsandhighercosttothepatient.Performanceofdrugscanbeimprovedbydecreasingtheparticlesizeand,atthesametime,increasingspecificsurfacearea,dissolutionrateandthebioavailabilityofthedruginthehumanbody.Theroutesofadministrationaredifferentandlistedas60%fororal,5%forpulmonary,5%forocular,5%fortopicaland25%forinjectable,approximately.Theinjectabledrugsarethemostinterestingonesfornanoization,becausesmallerparticleswillincreaseperformance,andwillbeusefulwhenusingmicroneedles.InatypicalmanufacturingprocessofAPIs(activepharmaceuticalingredients)topdownprocesseslikehighpressurehomogenizationandwetbeadmillingareusedasstandardmethodstodecreasetheparticlesizesdowntoafinenessrangeof10to500nanometers.