简介：【摘要】主要介绍整车静态电流的产生、计算及验证方法，避免整车停驶一段时间蓄电池的电量异常消耗引起车辆无法启动及用电器不能工作问题的发生。

简介：为了减少复杂设计中可能的亚稳态风险，不少公司都采用工具或人工来检查设计中存在跨时钟域的问题。传统的检查方法只能检查设计中是否做了跨时钟域的处理，却无法检查处理得是否合理，而静态Formal验证技术采用数学穷举的方法，利用断言对设计中的同步器进行快速验证，确保数据的可靠传输，有效避免了一些设计缺陷。Mentor公司的QuestaCDC和Forma1工具可以对设计进行跨时钟域的检查，并可用Formal引擎证明设计中跨时钟域同步器与其断言的一致性，可极大地提高复杂设计的验证效率和鲁棒性。

简介：Thisarticleintendstodiscussonefundamentalaspectofstyle…differencesbetweenformalandinformalEnglishwithconcreteexamplesthroughsomespecificfeaturesthatdistinquishthesetwotypesofEnglish.

简介：ｆｏｒｍｅｌｌ，ｆｏｒｍａｌ，ｆｏｒｍａｌｉｓｔｓｃｈ，ｆｏｒｍｌｉｃｈ复旦大学王滨滨ｆｏｒｍｅｌｌ作“按照规定的”，“正式的”，“官方的”，“礼节性的”，“形式上的”解：ＥｒｈａｔｄｅｍＦｒｅｕｎｄｓｅｉｎｅｓＶａｔｅｒｓｅｉｎｅｎｆｏｒｍｅｌｌｅ...

简介：在研究静态随机存储器故障模型以及常用功能验证方法的基础上，提出采用MarchSOF算法结合故障注入的EDAC测试程序作为宇航用带EDAC功能SRAM存储器的验证方法。该方法将MarchSOF算法扩展为32位字定向算法，同时增加数据保持故障以及EDAC功能的测试，可以对宇航用SRAM进行全方位功能验证。采用实际电路，对该方法进行实现和验证，验证结果表明了方法的可行性和有效性。

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简介：ThispaperpresentsanotherformalproofforthecorrectnessoftheDeadlineDrivenScheduler(DDS).ThisproofisgivenintermsofDurationCalculuswhichprovidesabstractionforrandompreemptionofprocessor.Comparedwithotherapproaches,thisproofreliesonmanyintuitivefacts.Thereforethisproofismoreintuitive,whileitisstillformal.

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简介：Toensurethatlimitedresourcesareallocatedmoreeffectivelytoreducemarinerisks,formalsafetyassessment(FSA),aproactivemethod,isintroducedinplanningavesseltrafficsystem(VTS).BasedonthedataofWuhanport,somenewsolutionsbasedonrisk-indicesareputforward.Theweightednumberoftrafficaccidentsispredictedafterthefutureweightedvesseltrafficvolumeisestimatedbyanalyzingthetrendoftradedevelopment.Toanalyzeriskacceptability,theas-low-as-reasonably-practica...

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简介：Thispapergivesallthetwo-dimensionalmembranemodelsobtainedfromformalasymptoticanalysisofthethree-dimensionalgeometricallyexactnonlinearmodelofathinelasticshellmadewithaSaintVenant-Kirchhoffmaterial.Therefore,theothermodelscanbequotedasflexuralnonlinearones.Theauthoralsogivestheformalequationssolvedbytheassociatedstresstensorandpointsoutthatonlyoneofthosemodelsleads,bylinearization,tothe“classical”linearlimitingmembranemodel,whosejuetificationhasalreadybeenestablishedbyaconvergencetheorem.

简介：在法文教育文献中,不时会遇到两个词,即'educationnon-formelle'和'educationinformelle',与此相对应的英文是:'informaleducation'和'non-formaleducation'。它们经常都被译为非正规教育。《英汉教育词汇》(教育科学出版社,1982年版)便是一例。在该书中,'informaleducation'被译为非正规教育(参见第92页),'non-formaleducation'一词虽未专门列目,但已把'non-formaleducationdevelopmentcenter'译为非正规教育发展中心(参见第119页),因而这两个词的译名实际上未加以区别。

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简介：Aconnectedgraph,whoseblocksareallcliques(ofpossiblyvaryingsizes),iscalledablockgraph.LetD(G)beitsdistancematrix.Inthisnote,weprovethattheSmithnormalformofD(G)isindependentoftheinterconnectionwayofblocksandgiveanexplicitexpressionfortheSmithnormalforminthecasethatallcliqueshavethesamesize,whichgeneralizetheresultsondeterminants.

简介：ThispaperexploitsBooleansatisfiabilityprobleminequivalencecheckingandmodelcheckingrespectively.Acombinationalequivalencecheckingmethodbasedonincrementalsatisfiabilityispresented.Thismethodchoosesthecandidateequivalentpairswithsomenewtechniques,andusesincrementalsatisfiabilityalgorithmtoimproveitsperformance.Bysubstitutingtheinternalequivalentpairsandconvertingtheequivalencerelationsintoconjunctivenormalform(CNF)formulas,thisapproachcanavoidthefalsenegatives,andreducethesearchspaceofSATprocedure.ExperimentalresultsonISCAS'85benchmarkcircuitsshowthat,thepresentedapproachisfasterandmorerobustthanthoseexistedinliterature.Thispaperalsopresentsanalgorithmforextractingofunsatisfiablecore,whichhasanimportantapplicationinabstractionandrefinementformodelcheckingtoalleviatethestatespaceexplosionbottleneck.Theerrorofapproximateextractionisanalyzedbymeansofsimulation.Ananalysisrevealsthataninterestingphenomenonoccurs,withtheincreasingdensityoftheformula,theaverageerroroftheextractionisdecreasing.AnexactextractionapproachforMUsubformula,referredtoaspre-assignmentalgorithm,isproposed.Boththeoreticalanalysisandexperimentalresultsshowthatitismoreefficient.

简介：TheadvantageofCOOZ(CompleteObject-OrientedZ)istospecifylargescalesoftware,butitdoesnotsupportrefinementcalculus.Thusitsapplicationisconfinedforsoftwaredevelopment.IncludingrefinementcalculusintoCOOZovercomesitsdisadvantageduringdesignandimplementation.Theseparationbetweenthedesignandimplementationforstructureandnotationisremovedaswell.Thenthesoftwarecanbedevelopedsmoothlyinthesameframe.ThecombinationofCOOZandrefinementcalculuscanbuildobject-orientedframe,inwhichthespecificationinCOOZisrefinedstepwisetocodebycalculus.Inthispaper,thedevelopmentmodelisestablished,whichisbasedonCOOZandrefinementcalculus.Datarefinementishardertodealwithinarefinementtoolthanordinaryalgorithmicrefinement,sincedatarefinementusuallyhastobedoneonalargeprogramcomponentatonce.Astotheimplementationtechnologyofrefinementcalculus,thedatarefinementcalculatorisconstructedandanapproachfordatarefinementwhichisbasedondatarefinementcalculusandprogramwindowinferenceisoffered.

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简介：摘要GPS静态测量技术与传统的测量技术相比具有明显的优势，能够在短时间内完成精确度极高的测量工作，并提供准确的三维坐标，同时实现全天候测量。利用GPS静态测量在控制测量中主要负责外业观测数据的采集以及基线解算、成果输出等处理工作。目前GPS测量技术由于其优越的性能被广泛的应用于各个领域，具有广阔的发展前景。本文将对GPS静态控制测量技术进行分析与探究。