简介：ManyInternet-GIShavebeenimplementedonthewebandtheyareincreasinglybecominganimportantpartofmultimediacartographythathasmuchmoreusersascomparedtotraditionalGISproductionmedia.InternetGIStechnologyhasprovidedtheGISdynamicinformationacquisitionwithtechnicalsupport.Also,thevisualizationtechnologyofelectronicmaphasprovidedtoolsforGISsymbolswithdynamiccharacteristics.OnthebasisofGISdynamicinformationacquisition,thedesignideaandimplementationmethodsofdynamicsymbolsindynamicGISarepresentedinthisarticle.

简介：反公羊保护桩系统，在大楼和基础结构附近被安装，能阻止非法的车辆进入，从忍受车辆的即席创作的爆破装置(VBIED)维持距离并且减少相应损坏。与一个固定保护桩系统相比，当当需要时，它能被移开，一个可移动的保护桩系统提供更多的灵活性。这份报纸首先建议评估K4的可移动的反公羊保护桩系统的一种新类型。模仿撞击保护桩系统的车辆的碰撞，一个有限元素模型然后通过数字模拟结果和存在试验性的结果的比较被造并且验证。基于直角的设计方法，影响这个建议系统的安全和经济的因素根据他们的重要性被检验并且排序。一个最佳的设计计划然后被生产。最后，策划验证建议设计的有效性，包括影响测试的二前面影响测试和二个方面，四动态影响测试根据BSI说明被进行了。标本的剩余旋转角度比30o小并且满足BSI说明的要求。

简介：Themainfocusisnonlinearmodel-baseddynamicpositioning(DP)controlsystemdesign.Anonlinearuniformglobalexponentialstability(UGES)observerproducesnoise-freeestimatesoftheposition,theslowlyvaryingenvironmentaldisturbancesandthevelocity,whichareusedinaproportional-derivative(PD)+feedforwardcontrollaw.Thestabilityofthisobserver-controllersystemisprovedbyintroducingaspecificnonlinearcascadedsystem.ThesimulationresultshavesuccessfullydemonstratedtheperformanceofdesignedDPcontrolsystem.

简介：Physicsexperimentsthatgeneratelargeamountsofdataneedtobeabletoshareitwithresearchersaroundtheworld.Highperformancegridsfacilitatethedistributionofsuchdatatogeographicallyremoteplaces.Dynamicreplicationcanbeusedasatechniquetoreducebandwidthconsumptionandaccesslatencyinaccessuingthesehugeamountsofdata.Wedescribeasimulationframeworkthatwehavedevelopedtomodelagridscenario,whichenablescomparativestudiesofalternativedynamicreplicationstrategies.Wepresentpreliminaryresultsobtainedwiththissimulator,inwhichweevaluatetheperformanceofsixdifferentreplicationstrategiesforthreedifferentkindsofaccesspatterns.Thesimulationresultsshowthatthebeststrategyhassignificantsavingsinlatencyandbandwidthconsumptioniftheaccesspatternscontainamoderateamountofgerographicallocality.

简介：Astheexplorationandexploitationofoilandgasproliferatethroughoutdeepwaterarea,therequirementsonthereliabilityofdynamicpositioningsystembecomeincreasinglystringent.Thecontrolobjectiveensuringsafetyoperationatdeepwaterwillnotbemetbyasinglecontrollerfordynamicpositioning.Inordertoincreasetheavailabilityandreliabilityofdynamicpositioningcontrolsystem,thetripleredundancyhardwareandsoftwarecontrolarchitecturesweredesignedanddevelopedaccordingtothesafespecificationsofDP-3classificationnotationfordynamicallypositionedshipsandrigs.Thehardwareredundantconfigurationtakestheformoftriple-redundanthotstandbyconfigurationincludingthreeidenticaloperatorstationsandthreereal-timecontrolcomputerswhichconnecteachotherthroughdualnetworks.Thefunctionofmotioncontrolandredundancymanagementofcontrolcomputerswereimplementedbysoftwareonthereal-timeoperatingsystemVxWorks.Thesoftwarerealizationoftaskloosesynchronization,majorityvotingandfaultdetectionwerepresentedindetails.Ahierarchicalsoftwarearchitecturewasplanedduringthedevelopmentofsoftware,consistingofapplicationlayer,real-timelayerandphysicallayer.ThebehavioroftheDP-3dynamicpositioningcontrolsystemwasmodeledbyaMarkovmodeltoanalyzeitsreliability.Theeffectsofvariationinparametersonthereliabilitymeasureswereinvestigated.Thetimedomaindynamicsimulationwascarriedoutonadeepwaterdrillingrigtoprovethefeasibilityoftheproposedcontrolarchitecture.

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简介：TraditionalevaluationtechniquesformutualfundsarebasedonCAPMorAPT.ProposeanewmeasurebenefitingfromValueatRiskisproposedinthispaper.WeshowhowtoapplytheVARdynamicstotheevaluationofmutualfunds.Meanwhile,weappliedtheideatothedesignofdynamicportfolioconstructionstrategies.Asfortheportfolioweightadjusting,thispaperisfocusedontheoptimaladjustingstrategieswithcosthappensandthoseonconcretetimepoints.

简介：设计会被忽略而导致过时的产品或服务,为了去解决设计管理相关工作的问题,当需要去做有关于设计及管理设计个案的决定时皆会有些许的不安

简介：Inthispaper,anAntColonySystem(AC)basedheuristicalgorithmispresentedtofindthemulti-constraineddynamicQualityofService(QoS)multicastrouting.WealsoexplorethescalabilityoftheACalgorithmandmulticasttreebyusing"Pull"modeinsteadof"Push"mode,andtheimprovementonthetimecomplexityofACalgorithmbyusinganewdatastructure,I.e.,apointerarrayinsteadoftheprevious"matrix"structure.Ourextensivetestsshowthatthepresentedalgorithmcanfindtheglobaloptimumorsuboptimum,andhasagoodscalabilitywithdynamicadaptationtothechangeofmulticastgroup,andgivesbetterperformanceintermsofthetotalcostthanothertwoalgorithms.

简介：Accordingtothecharacteristicofthesensorinertia,thedynamicpredictiontoimprovethesystemdynamicprecisionispresentedinthispaper.Withtherecurrencecalculationoftimeconstantofthesensor,thesystemdynamicprecisionisgreatlyimproved.Theexampleusingthismethodisgiven.

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简介：因为不想重头制造轮子，所以会从设计模式中寻求协助一学习了解、甚或组合创造他人的经验与实际的精华。

简介：Theshipdesignprocessmodelisthebasisfordevelopingtheshipcollaborativedesignsystemundernetworkenvironment.Accordingtothecharacteristicsoftheshipdesign,amethodfordividingtheshipdesignprocessintothreelayersispatforward,thatisprojectlayer,designtasklayeranddesignactivitylayer,thentheformalizeddefinitionsoftheshipdesignprocessmodel,thedecomposingprinciplesoftheshipdesignprocessandthearchitectureoftheshipcollaborativedesign(SDPM)systemarepresented.Thismethodsimplifiestheactivitynetwork,makestheoptimizationandadjustmentofthedesignplanconvenientandalsomakesthedesignprocesseasiertocontrolandchange,atlastthearchitectureoftheshipcollaborativedesignsystemisdiscussed.

简介：Withtherapiddevelopmentofdeepsubmicron(DSM)VLSIcircuitdesigns,manyissuessuchastimeclosureandpowerconsumptionaremakingthephysicaldesignsmoreandmorechallenging.InthisreviewpaperweprovidereaderswithsomerecentprogressoftheVLSIphysicaldesigns.Therecentdevelopmentsoffloorplanningandplacement,interconnecteffects,modelinganddelay,bufferinsertionandwiresizing,circuitorderreduction,powergridanalysis,parasiticextraction,andclocksignaldistributionarebrieflyreviewed.

简介：Wepresentasemi-customdesignmethodologybasedontransistortuningtooptimizethedesignperformance.Comparedwithothertransistortuningapproaches,ourtuningprocesstakesthecross-talkeffectintoaccountandprominentlyreducesthecomplexityforcircuitsimulationandanalysisbydecomposingthecircuitnetworkutilizinggraphtheory.Furthermore,theincrementalplacementandroutingforthecorrespondingtransistortuninginconventionalapproachesisnotrequiredinourmethodology,whichmightinducetiminggraphvariationandadditionaliterationsfordesignconvergence.Thismethodologycombinestheflexibleautomatedcircuittuningandphysicaldesigntoolstoprovidemoreopportunitiesfordesignoptimizationthroughoutthedesigncycle.

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简介：Inordertoachieveintegrationofelectrmotionandmanualoperationformanualforklift,thispaperdesignsanimprovedmanualforklift.Weselecttheappropriatemotoraccordingtoparametersoforiginalmanualforklift,whichwasanalyzedbySolidWorks.Wemakethedetaileddesignofthespeedreduceraccordingtotheselectedmotor’sratedspeedandotherparameters,anddesignthereductionspeedratio,reductionspeedform,sizeofgeardrive,meshingparameters,forceanalysisofgearandstrengthcheck.Inthispaper,weelectrifythetraditionalmanualforklifteventually.