简介:Trafficruleisakeyfactoraffectingtrafficflowandsafety.Wedevelopourmodels,includingthecellularautomatatrafficflowmodelaswellasthelinearregressionone,aimingatcalculatingtrafficflowandevaluatingsafetyconditionswithvariedtrafficrules.Then,wethoroughlyinvestigatefourtypesofpathsinafreeway,namelytwostraightlanes,threestraightlanes,ramps,androundaboutsascasestudiesanddiscussthedifferenttrafficrulesascomparison.Theresultsdemonstratethat“Keep-Right-Except-To-Pass”ruleisnotaseffectiveasthefreeruleinpromotingtrafficflow;however,thisruleensuressafetyfordriversbetterthanthefreerule.Additionally,anewtrafficrule,whichsetsdifferentpostedspeedlimitsforadjacentlanes,isproposedtopromotebettertrafficflowwithsafetyrequirementssatisfied.Furthermore,weapplyeffectiverulesandalternatives,leftdrivingnormsaswellasintelligentsystemasextensionandobtainbetterresults.Finally,model’ssensitivityanalysisregardingtoprobabilityofdeceleratingandpostedspeedlimitsprovesthestabilityofourresults.
简介:Thisthesisisexpectednotonlytogivereaderspleasurefromtheangleofbeinghumorous,butalsotohelpthemgetabetterunderstandingofEnglishhumorfromthepragamaticperspective.
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简介:与联系的谎言点对称新(2+1)维的KdVequationu_t+3u_xu_y+u_(xxy)=0被调查。一些类似减小被解决相应特战程导出。为这个方程的Painleve分析也被介绍,孤立子答案从Baecklund转变直接被获得。
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简介:-ThisarticleisaimedattheexperimentalstudyofthehydrodynamicloadinginducedbywavesandcurrentactingontheJZ20-2submarinecompositepipelines.Thecorrespondinghydrodynamiccoefficientsobtainedinthisexperimentalstudycanbeappliedtoengineeringprojects.
简介:Thispaperreportsthatsingle-layerandgradedAu-TiO2granularcompositefilmswithAuatomcontent15%-66%werepreparedbyusingreactiveco-sputteringtechnique.Thethird-orderopticalnonlinearityofsingle-layerandgradedcompositefilmswasinvestigatedbyusingsandp-polarizedZ-scansinfemtosecondtimescale.Thenonlinearabsorptioncoefficientβeffofsingle-layerAu-TiO2filmsismeasuredtobe-2.3×1030.76×103cm/GWwithAuatomcontent15%-66%.Theβeffvalueofthe10-layerAu-TiO2gradedfilmisenhancedtobe-2.1×104cm/GWcalculatedfromp-polarizedZ-scans,whichisabouttentimesthemaximumβeffofsingle-layerfilms.Broadenedresponseinthewavelengthregion730-860nmoftheenhancedopticalnonlinearityofgradedAu-TiO2compositefilmswasalsoinvestigated.
简介:Single-gritgrindingofa2.5Dwovencompositewasinvestigatedbythefinite-elementmethod(FEM)usingaunit-cellmodel.Accordingtoourhypotheses,theaxisofthewarpyarnwasasinusoidalcurveandthecrosssectionoftheweftyarnwasshapedlikeabiconvexlens.AVUMATsubroutinewasusedtoconstructtheconstitutivemodelofthe2.5Dwovencomposite.ThegrindingprocessofthecompositewasanalyzedusinganFEMsimulationwiththeABAQUS/Explicitsoftware.Avalidationexperimentwasalsocarriedout.Thesimulationresultsshowedthatagrindingcrackwaswellsimulated.Furthermore,thejunctionsbetweenthewarpyarnandweftyarnwerefoundtobeseriouslydamagedandcrackswereobservedtoextendoutwardalongthewarpfiberduringgrinding,ingoodagreementwiththeexperimentalresults.Inaddition,thestrainofweftyarnswasobviouslygreaterthanthatofwarpyarnswhenthegrindingdirectionwasperpendiculartotheweftyarnsandparalleltotheaxisofthewarpyarns.Theseresultsdemonstratethatthemesostructurestronglyinfluencesthegrindingdamageinflictedonwovencomposites.