简介：正交频分复用技术（OFDM）的优点是具有较高的频谱利用率和较强的抗多径衰落的能力,被看作是B3G乃至4G系统中的核心技术之一,但是OFDM系统存在较高的峰均功率比（PAPR）。部分传输序列（PTS）方法通过选择合适的相位旋转因子序列以降低信号峰值出现的概率,从而降低OFDM信号的峰均比值,因此不会使信号发生崎变,但是传统的PTS技术计算复杂度大大,因而在保证有效降低OFDM信号峰均比的前提下大幅度降低传统PTS的复杂度就成为PTS技术实用化的关键。

简介：VoIP(VoiceoverIP)isarapidlygrowingareawithgreatmarketpotential.Topromoteitforbothcommericalandresearchpurposes,aprototypeVoIPsystembasedonstate-of-the-artotorolacommunicationtechniqueshasbeendeveloped.ItisagatewaysystemintegratingaPBXandaVoIPmodule.AllcomponentsthatH.323definestosupprotVoIPareimplementedintheVoIPmodule,thoughinasimplifiedmanner,Asanembeddedsystem,thesystemfeaturesrealtimenessandtaskdistributiveness.Anumberofaddiitonaltechniquesareusedtoimprovetheperformance,includingnoisesuppression,zerocopy,andbufferstructureoptimization.Whenrefinedininteroperability,thesystemwillalsoreadilyserveasaproduct.

简介：Typesystemprovidesaprecisedescriptionofaprogramminglanguage.Thisisaprerequisitefortheimplementationanduseoflanguage.Italsoconductsmechanicalandtransparenttype-checkingonprogramstopreventtheoccurrenceofexecutionerrorduringtherunningofprograms.So,itcanbesaidthat,ontheonehand,typesystemworksasaformaltooltodomathematicalanalysisoflanguage;ontheotherhand,itisaformalmethodforrigorouslyandpreciselydesigningandimplementinglanguage.Inthispaper,somebasicconceptsoftypesystemarediscussedfirst.Andthen,theimplementationofagraph-rewriting-basedfunctionallanguage－SClean'stypesystemisgivenindetails.Itishopedthattheproposedmethodofusingandimplementingtypesystemisofpracticalusefulness.

简介：Thedistributedcomputersystemdescribedinthispaperisasetofcomputernodesinterconnectedinaninterconnectionnetworkviapacket-switchinginterfaces.Thenodescommunicatewitheachotherbymeansofmessage-passingprotocols.Thispaperpresentstheimplementationofrendezvousfacilitiesashigh-levelprimitivesprovidedbyaparallelprogramminglanguagetosupportinterprocesscommunicationandsynchronization.

简介：这篇论文处理格子技术没象1990年代的网技术一样快传播的问题。在过去的10年里，可观的努力被放进格子计算。许多进步被取得了；更重要地，基础质问；这块地的必要问题正在出现。这篇论文集中于网格系统软件研究的区域，；主张网格系统软件的可用性必须被提高。它识别四个可用性问题，从国际格子研究经验绘画。它也在探讨这些挑战由Vega格子队介绍进展。

简介：Inthispaper,anovelbiontetricidentificationsystemispresentedtoidentifyaperson'sidentitybyhis/herpalmprint.Incontrasttoexistingpalmprintsystemsforcriminalapplications,theproposedsystemtargetsatthecivilapplications,whichrequireidentifyingapersoninalargedatabasewithhighaccuracyinreal-time.Thesystemisconstitutedbyfourmajorcomponents:UserInterfaceModule,AcquisitionModule,RecognitionModuleandExternalModule.Morethan7,000palmprintimageshavebeencollectedtotesttheperformanceofthesystem.Thesystemcanidentify400palmswithalowfalseacceptancerate,0.02%,andahighgenuineacceptancerate,98.83%.Forverification,thesystemcanoperateatafalseacceptancerate,0.017%andafalserejectionrate,0.86%.Theexecutiontimeforthewholeprocessincludingimagecollection,preprocessing,featureextractionandmatchingislessthan1second.

简介：Wehavedevelopedafuzzyneuralexpertsystemthathastheprecisionandlearningabilityofaneuralnetwork.Knowledgeisacquiredfromdomainexpertsasfuzzyrulesandmembershipfunctions.Then,theyareconvertedintoaneuralnetworkwhichimplementsfuzzyinferencewithoutrulematching.Theneuralnetworkisappliedtoproblem-solvingandlearnsfromthedataobtainedduringoperationtoenhancetheaccuracy.Thelearningabilityoftheneuralnetworkmakesiteasytomodifythemembershipfunctionsdefinedbydomainexperts.Also,bymodifyingtheweightsofneuralnetworksadaptively,theproblemofbeliefpropagationinconventionalexpertsystemscanbesolvedeasily.Convertingtheneuralnetworkbackintofuzzyrulesandmembershipfunctionshelpsexplaintheinnerrepresentationandoperationoftheneuralnetwork.

简介：在一个善跑的马拉松运动员身上是很难找到多余脂肪的，因为只有轻装上阵，才可健步如飞。同样，在一个稳定快速的系统里，也应该没有冗余文件来影响系统的运行。经过几个月的使用，相信你的系统已经臃肿不堪了吧，现在让我们踏出长假清理计划的第一步：系统清理！不懂注册表?不懂系统优化?不要紧!

简介：在这份报纸，我们在场Tianhe-2互连传递服务的网络和消息。我们描述路由器和网络接口芯片的体系结构，并且加亮有效地支持高效通讯的一套硬件和软件特征，在遥远的直接存储器存取上变化，集体优化，硬件启用可靠端对端的通讯，用户级的消息过去服务，等等。测量硬件表演结果也被介绍。

简介：PROOSisadistributedoperatingsystemrunningonthecomputingnodesofmassivelyparallelprocessingcomputerDawning-1000.Itisanefficientandeasilyextendiblemicrokerneloperatingsystem.ItsupportstheIntelNXmessagepassinginterfaceforcommunication.

简介：ThispaperintroducesakindofsemanticcomputationandpresentshowtocombineitintoourChineseQuestion-Answering(QA)system.Basedontwokindsoflanguageresources,HownetandCilin,wepresentanapproachtocomputingthesimilarityandrelevancybetweenwords.Usingtheseresults,wecancalculatetherelevancybetweentwosentencesandthengettheoptimalanswerforthequeryinthesystem.ThecalculationadoptsquantitativemethodsandcanbeincorporatedintoQAsystemseasily,avoidingsomedifficultiesinconven-tionalNLP(NaturalLanguageProcessing)problems.Theexperimentsshowthattheresultsaresatisfactory.

简介：ThispaperintroducesaheterogeneousdistributeddatabasesystemcalledLSZsystem,whereLSZisanabbreviationofLiShizhen,anancientChinesemedicalscientist.LSZsystemadoptsclusterasdistributeddatabasenode(orsite).Eachclusterconsistsofoneofseveralmicrocomputersandoneserver.Tepaperdescribesitsbasicarchitectureandtheprototypeimplementation,whichincludesqueryprocessingandoptimization,transactionmanageranddatalanguagetranslation.ThesystemprovidesauniformretrieveandupdateuserinterfacethroughglobalrelationaldatalanguageGRDL.

简介：Alambdasystemwithalgebraicoperators,Lambda-plussystem,isintroduced.Aftergivingthedefinitionsofthesystem,wepresentasufficientconditionforformulatingamodelofthesystem.Finally,amodelofsuchsystemisconstructed.

简介：Thispaperexposestheconcurrentcharacteristicinthecommunicaionbetweenprocessorsinatransputerbasedsystem,andproposesanapproximateformulaforassessingthegranularityofdistributingtheparallelprocessesamongprocessors.ThereallymeasuredresultsforapipelinesortingprogramrunggingontheT-rackconfirmthesededucedresults.

简介：Tousereasoningknowledgeaccuratelyandefficiently,manyreasoningmethodshavebeenproposed.However,thedifferencesinformamongthemethodsmayobstructthesystematicalanalysisandharmoniousintegrationofthem.Inthispaper,acommonreasoningmodelJUM(JudgementModel)isintroduced.AccordingtoJUM,acommonknowledgerepresentationformisabstractedfromdifferentreasoningmethodsanditslimitationisreduced.WealsoproposeanalgorithmfortransformingonetypeofJUMsintoanother.Insomecases,thealgorithmcanbeusedtoresolvethekeyproblemofintegratingdifferenttypesofJUMinonesystem.Itispossiblethatanewarchitectureofknowledge-basedsystemcanberealizedunderJUM.

简介：RecentresearchonDistributedArtificialIntelligence(DAI)hasfocuseduponagents'interactioninMultiagentSystem.sThispaperpresentsatextunderstandingorientedmultiagentdynamicinteractiontestbed(TUMIT);thetheoreticframeworkbasedupongametheory,thefree-market-likesystemmarchitecture,andexperimentationonTUMIT.UnlikeotherDAItestbeds,TUMITviewsdifferenttextunderstanding(TU)methodsasdifferent“computationalresources”,andmakesagentschoosedifferentTUpathsandcomputationalresourcesaccordingtotheresouceinformationonthebulletinsintheirhostcomputer.Therefore,inTUMIT,taskallocationiswhollydistributed.ThismakesTUMITworklikea“freemarket”.Insuchasystem,agents'choicesandresourceloadmayoscillate.Itisshowntheoreticallyandexperimentallythatifagentsusemulti-levelof“historyinformation”,theirbehaviorwilltendtoconvergetoaNashequilibriumsituation;andthatifagentsuse“fecall-forget”strategyon“historyinformation”,theconvergencecanbeacceleratedandtheagentscanacclimatethemselvestochangedenvironment.ComparedwithotherDAItestbeds,TUMITismoredistributed,andtheagentsinTUMITaremoreadaptivetothedynamicenvironment.

简介：以往，每当Office推出新版本，我们总是会及时地做一些颇为全面的试用和测试，然后将新版本较之老版本所作的重大改进逐一罗列，诸如功能如何增强、易用性如何完善……然而此次拿到OfficeSystem，试用过后发现，我们无法用以往的方式来描述这个新版本，因为它所带来的变革已经不是惯用的标准可以衡量的。

简介：Inthispaper,ageometry-basedpointcloudreductionmethodisproposed,andareal-timemobileaugmentedrealitysystemisexploredforapplicationsinurbanenvironments.Weformulateanewobjectivefunctionwhichcombinesthepointreconstructionerrorsandconstraintsonspatialpointdistribution.Basedonthisformulation,amixedintegerprogrammingschemeisutilizedtosolvethepointsreductionproblem.Themobileaugmentedrealitysystemexploredinthispaperiscomposedoftheofttineandonlinestages.Attheofflinestage,webuildupthelocalizationdatabaseusingstructurefrommotionandcompressthepointcloudbytheproposedpointcloudreductionmethod.Whileattheonlinestage,wecomputethecameraposeinrealtimebycombininganimage-basedlocalizationalgorithmandacontinuousposetrackingalgorithm.Experimentalresultsonbenchmarkandrealdatashowthatcomparedwiththeexistingmethods,thisgeometry-basedpointcloudreductionmethodselectsapointcloudsubsetwhichhelpstheimage-basedlocalizationmethodtoachievehighersuccessrate.Also,theexperimentsconductedonamobileplatformshowthatthereducedpointcloudnotonlyreducesthetimeconsumingforinitializationandre-initialization,butalsomakesthememoryfootprintsmall,resultingascalableandreal-timemobileaugmentedrealitysystem.

简介：Systemadministratordealswithmanyproblems,ascomputingenvironmentbecomesincreasinglycomplex.Systemswithanabilitytorecognizesystemstatesandadapttoresolvetheseproblemsofferasolution.Muchexperienceandknowledgearerequiredtobuildaself-adaptivesystem.Self-adaptivesystemshaveinherentdifficulties.Thispaperproposesatechniquethatautomaticallygeneratesthecodefortheself-adaptivesystem.Thusthesystemiseasiertobuild.Self-adaptivesystemsofpreviousresearchrequiredhighsystemresourceusage.Incorrectoperationcouldbeinvokedbyexternalfactorssuchasviruses.Weproposeanimprovedself-adaptivesystemapproachandapplyittovideoconferencesystemandrobotsystem.Wecomparedthelinesofcode,thenumberofclassescreatedbythedevelopers.Wehaveconfirmedthisenhancedapproachtobeeffectiveinreducingthesedevelopmentmetrics.

简介：Sequentialdiagnosisisaveryusefulstrategyforsystem-levelfaultidentificationbecauseofitslowercostofhardware.Inthispaper,thecharacterizationofsequentiallyt-diagnosablesystemisgiven,andauniversalalgorithmtoseekfaultyunitsinthesystemisdeveloped.