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简介：ThispaperstudiestheoperatingcharacteristicsofanM/G/1queuingsystemwitharandomizedcontrolpolicyandatmostJvacations.Afterallthecustomersareservedinthequeueexhaustively,theserverimmediatelytakesatmostJvacationsrepeatedlyuntilatleastNcustomersarewaitingforserviceinthequeueuponreturningfromavacation.IfthenumberofarrivalsdoesnotreachNbytheendoftheJ~(th)vacation,theserverremainsidleinthesystemuntilthenumberofarrivalsinthequeuereachesN.IfthenumberofcustomersinthequeueisexactlyaccumulatedNsincetheserverremainsidleorreturnsfromvacation,theserverisactivatedforserviceswithprobabilitypanddeactivatedwithprobability(1-p).Forsuchvariantvacationmodel,otherimportantsystemcharacteristicsarederived,suchastheexpectednumberofcustomers,theexpectedlengthofthebusyandidleperiod,andetc.Followingtheconstructionoftheexpectedcostfunctionperunittime,anefficientandfastprocedureisdevelopedforsearchingthejointoptimumthresholds(N~*,J~*)thatminimizethecostfunction.Somenumericalexamplesarealsopresented.

简介：我们工作，抽象K和J插值方法由顺序格子Γ产生了。我们由以操作员的限制的理想的措施为插入内推的操作员的理想的措施建立公式从给定的操作员理想调查一个插入内推的操作员的偏差。公式在Γ上以移动操作员的标准被给。

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简介：随着双J管的普及使用,出现的并发症也日渐增多,其中双J管拔除困难处理较为棘手.我院自1997年3月至2001年5月共收治6例双J管拔除困难患者,经输尿管镜及开放手术治疗效果满意,报告如下.

简介：J-1型脱细胞异体真皮是由北京桀亚莱福生物技术有限责任公司研制生产具有自主知识产权的国内第一家实现临床应用的新型生物组织工程产品，可广泛应用于各种原因导致的软组织缺损的修复与重建。

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简介：J2ME和J2EE技术的结合为移动教师工资查询系统提供了很好的解决方案。介绍了J2ME-J2EE技术的体系结构,阐述了系统的整体架构,并讨论了系统J2ME客户端和J2EE服务器端的设计和实现方法。

简介：Amurinemacrophage-likecellline,J774,acquried,inresponsetoLPS,anabilitytokilltumornecrosisfactor（TNF）-insensitivetargetP815mastocytomacells,whereasanothercellline,P388D1,didnot.LPS-triggeredsignalingmechanismsbetweenthetwocelllineswerecomparedwithanaimtoinquireaboutthepossiblenatureoftheabove-mentioneddifference.TheresultsshowedthattwocelllinesrespondtoLPS-treatmentbyparallelactivationofbothphospholipasesCandA2（PLCandPLA2）toapproximatelythesameextent.ThemaximumresponseofbothenzymesofJ774cellswasnotedwithin10minofthetreatment,whereasthatofP388D1cellsrequiredmorethan20min.TheotherpropertiesofLPS-responsiveenzymesstudiedweresimilarbetweentwocelllines,ineludingActivationofPLCandPLA2andPKCinmacrophagesbyLPSCa2+augmentationofenzymeactivation,participationofguaninenucleotidebinding（G）proteinsintheinitialactivationprocesses,andinhibitionofenzymeactivationbythepriortreatmentofcellswithcholeraorpartussistoxinsetc.Moreover,LPS-triggeredactivationofPLCandPLA2wasfoundtobefollowedbytheincreaseofPKCactivitiesinbothcelllines.Inspiteofthesesimilarities,J774cellspossessedbothbasicandacidicformsofPKCactivities,whileP388D1cellsownedonlyPKCofbasicform.Nevertheless,thequestionwhyJ774cells,butnotP388D1cells,canacquirethetumoricidalactiyity,aganistP815cellsfollowingLPS-treatmentremainstobeanswered.

简介：Wewillreviewsomeoftherequirementsforalaserthatwouldbeusedwithalaserfusionenergypowerplant,includingfrequency,spatialbeamsmoothing,bandwidth,temporalpulseshaping,efficiency,repetitionrate,andreliability.Thelowestriskandoptimumapproachusesakryptonfluoridegaslaser.Adiode-pumpedsolid-statelaserisapossiblecontender.

简介：LongyuanElectricPowerGroupisambitioustoaccelerateconstructionofwindpowerasitsownimportantstrategyofsustainabledevelopment.Ithasdrawnupsixstrategiesofqualifiedpeople,market,scale,operation,R&Dandbrandedwindpower,andworkshardforthetargetthatitsshareholdingwindpowerinstalledcapacityreachmorethan35%ofthetotalalloverthecountrywithinaperiodofsixyears.

简介：TheresearchinPowerElectronicsandDivesatTheHongKongPolytechnicUniversityhasbeenundertakingformanyyears.Recently,aPowerElectronicsResearchCentre(PERC)hasbeendevelopedthatiscontributedtowardstheresearchanddevelopmentinthearea.Itencompassesthehighfrequencypowersupplies,chaosandbifurcation,soft-switchingpowerconverters,electricalmachines,highprecisionmotioncontrol,tractionandtrafficcontrol,alternativeenergyandelectricalbuildingservices.

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简介：如果R是与d的特征2的一枚主要戒指，这笔记证明那R和L的推导R的noncentral谎言理想以便[d(u)，u]n是中央的，为所有u鈭吗？L，然后，R必须满足s4，在4个变量的标准身份。R是一枚semiprime戒指的案例被作者也检验。笔记的结果改进Carini和Filippis鈥檚结果。关键词主要戒指-semiprime戒指-谎言理想-推导先生(2000)题目分类16N60-16W25部分由中国博士后的科学基础支持了

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简介：TheelectricpowerindustryisafundamentalindustryinthenationaleconomyandtheChineseGovernmenthasalwaysputthepowerindustryonanimportantpriorityfordevelopment.Atpresent,keepingcontinuousrapidandstabledevelopmentofthepowerindustryfacestwochallengingissues—shortageofprimaryenergyresourcesandseriousenvironmentalpollution.Sothecleancoaltechnology(CCThereinafter)hasbeenplacedasoneofthemostpriorrealmfordevelopmentonthe

简介：TheChinaElectricityCouncilpublishedthereportontheanalysisofpowersupplyanddemandsituationacrossthecountryin2011recently.Accordingtothereportitisforecastedthatin2011,China'seconomywillkeepsteadyandfastgrowth,andpowerdemandwillcontinuetoincrease.Theelectricityconsumptionofthewholesocietyacrossthecountrywillreachabout4700TWhwithayear-on-yeargrowthofabout12%,whichwillslowdowntosomeextentascomparedwith2010.Withtheimplementationofindustrialdevelopment,energy-savingmeasuresandtariffpolicies,thegrowthandstructureofelectricityconsumptionwillbegreatlyimproved.

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简介：Whenexposedtointenseelectromagneticfields,thequantumvacuumisexpectedtoexhibitpropertiesofapolarizablemediumakintoaweaklynonlineardielectricmaterial.Variousschemeshavebeenproposedtomeasuresuchvacuumpolarizationeffectsusingacombinationofhigh-powerlasers.Motivatedbyseveralplannedexperiments,weprovideanoverviewofexperimentalsignaturesthathavebeensuggestedtoconfirmthispredictionofquantumelectrodynamicsofrealphoton–photonscattering.