简介:GOOD变速器手感出色BAD细节不够精细,动力一般绅宝X65问世的意义不仅仅在于扩充其产品线,更重要的是担当着拉升其品牌整体销量的重任。虽然城市SUV市场是国内目前最具发展潜力的蓝海之一,但绅宝X65面对的竞争压力却一点也不轻松。绅宝作为北京汽车旗下的中高端品牌,其自2012年广州车展发布以来至今已有近3年的时间,虽已上市了数款轿车产品,但从销量来看,仅D50交出的答卷还算令人满意。所以绅宝亟需一款能够扛起销量大旗的拳头产品来"主持大局"。从市场角度来说,绅宝上马SUV项目与竞品比起来要晚不少,但对于这个品牌来说,X65推出的速度已经相当迅速。
简介:Inthisinvestigation,themechanicalpropertiesandlow-temperaturefracturetoughnessofAPI5LX65offshorepipelineweldedjointswerestudied.StructureIntegrityAssessmentProcedure(SINTAP)-FailureAssessmentDiagram(FAD)methodwasappliedtothepipestructurewithsurfaceflawattheweldtoe.AccordingtotheISOstandardBS7448,theCTODfracturetoughnessoftheweldedjointswasdeterminedatthetemperatureof0℃.Fortheheat-affectedzone(HAZ)specimens,post-testmetallographicanalysiswasperformedtoverifythatthetipofthecrackwaslocatedinthecoarsecrystalzoneinordertoconfirmthevalidityoftheaboveresults.Thefailurelinesofanalysislevel1and3ofweldmetalwerederivedfromtheresultsofthemechanicalpropertytest.Theassessmentwasperformed,consideringthemaximumlaystress,residualstressconservativelyassumedtobeuniformtensilestress,andminimumCTODvalue.Theresultsoftheassessmentshowedthatpipelinestructurewithasurfaceflaw(theheightandlengtharerespectively2.2mmand5mm)attheweldtoeissafe.ThisstudylaysthefoundationofapplicationofSINTAPtopipelinestructureassessment.
简介:ThesusceptibilityofweldedjointfortheX65pipelinesteeltoH2Sstresscorrosioncracking(SCC)isinvestigated.SCCtestsonthesteelarecarriedoutintheenvironmentbasedonNACETM-01-77solutionwithsaturatedgaseousH2S.Thethresholdstressintensityfactorandcrackpropagationvelocityarecalculatedaccordingtowedge-openingloading(WOL)specimens.Thethree-dimensionalelastic-plasticfiniteelementanalysisofWOLspecimensisperformedbyusingtheFEMprogrammingpackageANSYS.Stressfieldandconcentrationofhydrogendistributionpropertyaheadofthecracktipareobtained.ThispapersurveyedthemicrostructureofweldedjointandstudiedonthemechanicalpropertiesofX65pipelinesteel.Itprovidesexperimentalbasisforstudyingstresscorrosion.Theresultsofnumericalanalysisareconsistentwithconclusionsofstresscorrosiontest.
简介:代数课本中指出:“在a>0时,|x|>a(?)x<-a或x>a;|x|0”。其实,这一等价性在a≤0时也同样成立。现证明如下:①当a=0吋,i|x|>a即|x|>0的解集显然是:x<0或x>0即x<-a或x>a。
简介:QuestionBOx问:(四川南充高中吕斌)有下列几道选择题困惑不解,请能给予解释:(1)TonnyisthebeststudentofthethreeInotherwords,heis___studentthantineothertwo.A.abetterB.thebetterC.thebestD.abest答案是A,为什么不是B?(2)IwaiteduntilTomandJackarrived.Then____begantodotheexperiment.A.allofthemB.thethreeofusC.threeofusD.bothofus答案是B,请问C有何错?(3)IknowthereIsacoinInyourlefthand.Butwhat’sInyour____hand?A.otherBanotherC.theotherD.others答案为A,但我认为应选C,因为theother表示两会中的另一个。(4)—DoyoubelievethatCharliedidbestintheexam?-Yes.Heissaid____veryhard.A.toworkBthatheworkedCtoha...
简介: 加拿大的GY!BE、英国的Mogwai、美国的ExplosionsInTheSky也许是当今世界上名气最大的三支后摇滚乐队.他们把后摇滚发展并推向了极致,无论是史诗般的长篇大论,还是精雕细琢的小品,都在这个领域里做出了典范.……