简介:Forworkflow-basedservicecompositionapproach,therelationsbetweentheWebserviceQoSandenvironmentsareusuallynotconsidered,sothattheinformationaboutQoSforcompositeserviceselectionisinaccurate.Itmakestheselectedcompositeserviceinefficient,orevenunexecutable.Toaddressthisproblem,anovelservicecompositionapproachbasedonproductionQoSrulesisproposedinthispaper.Generally,itisverydifficulttodirectlyanalyzehowdifferentkindsofenvironmentfactorsinfluencetheWebserviceQoS.Weadopt'black-box'analysismethodofoptimizingcompositeservices,discoveringtheknowledgesuchas'theQoSofoneWebservicewillbehigherinspecificenvironments'.Inourapproach,theexecutioninformationofthecompositeserviceisrecordedintoalogfirst,whichwillbetakenasthebasisofthesubsequentstatisticalanalysisanddatamining.Then,thetimelyQoSvaluesoftheWebservicesareestimatedandtheproductionQoSrulesbeingusedtoqualitativelyexpressthedifferentperformancesoftheWebserviceQoSindifferentenvironmentsaremined.Atlast,weemploytheminedQoSknowledgeoftheWebservicestooptimizethecompositeserviceselection.Extensiveexperimentalresultsshowthatourapproachcanimprovetheperformanceofselectedcompositeservicesonthepremiseofassuringtheselectingcomputationcost.
简介:Todaywearepracticallywitnessingandexperiencingarealbotinvasion.Itisthereforepermissibletoaskoneselfwhatabotis(anditiscertainlynot“sciencefiction”).Thetruthisthis:theyareprogramsthatrespondautomaticallytorequests/queriesfromhumanusers.Butwherecanwefindthem?Inmanyfieldsorsectorsbutespeciallyininstantmessaging,forexample:Whatsapp,Telegram,Facebook,orMessenger.Itseemsthatwearetalkingaboutsomethingcomplicatedorverydifficult,however,evenweuserscancreateabotthatcanhelpusorotherstosimulateconversationsoractionsofthehumanbeinginordertomakeiteasieranactionortaskthatmayberepetitive.Nowithasbecome,inashorttime,afashionthatisspreadinginmanysectorsforitsversatility.Therealityisthattherearemanytypesofbots.Dependingonthesituationandourgoal,wewillchooseoneortheother.Butlet’sstartfromthebeginningandbeforethinkingabouthowtocreateabot,let’sseewhatabotisexactly.
简介:Theexplosivegrowthofthebioinformaticsfieldhasledtoalargeamountofdataandsoftwareapplicationspubliclyavailableaswebresources.However,thelackofpersistenceofwebreferencesisabarriertoacomprehensivesharedaccess.Weconductedastudyofthecurrentavailabilityandotherfeaturesofprimarybioinfor-maticswebresources(suchassoftwaretoolsanddatabases).Themajority(95%)oftheexaminedbioinformaticswebresourceswerefoundrunningonUNIX/Linuxoperatingsystems,andthemostwidelyusedwebserverwasfoundtobeApache(orApache-relatedproducts).Oftheoverall1,130UniformResourceLocators(URLs)examined,91%werehighlyavailable(morethan90%ofthetime),whileonly4%showedlowaccessibility(lessthan50%ofthetime)duringthesurvey.Furthermore,themostcommonURLfailuremodesarepresentedandanalyzed.
简介:摘要简述烧结厂目前的实时工况系统监控情况,介绍WinCC实时画面发布系统运用在烧结厂的优势,体系框架的建立,难点突破,系统实施后效果。
简介://java.sun.com/jstl/xmlx支持JSP对XML文档的处理JSTL标签库功能十分强大,因此只要在需要使用JSTL的JSP文件的开始加入就开始使用JSTL,二、JSTL主要功能介绍JSTL是一个在不断开发和完善的开放源代码的JSP标签库