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简介：从2008年出国做交流生到现在硕士毕业已经整整6年了。转眼间,我即将踏入职场,翻开一段新的人生篇章。在这里将自己6年来如何从一个闭塞的三线小城市来到美国求学的经历记录下来,与君共勉。

简介：我发了火，必须为此道歉。他为自己的话公开道歉，恐怕我昨天的脾气不怎么好，我认为应该向你道歉。

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简介：TheDiverGasRecoverySystem(DGRS)isanimportantaccessoryequipmentofthe300mSaturationDiveSystem.Thesystemfacilitatestherecyclingofthebreathinggasesfordivers,therefore,ithasgreateconomicbenefits.InApril1995,a300munmannedtestanda100mmannedtestontheHY2031DGRSwerecarriedoutsuccessively.Tenmonthslater,anothermannedtestontheHY2032DGRS

简介：Agoodacousticenvironmentisabsolutelyessentialtomaintainingahighlevelsatisfactionandmoralhealthamongresidents.Noiseandotherboresomesoundscomefrombothin-doorandoutdoorsources.Fortheresidentialbuildingsadjacenttoheavytrafficroads,outdoorstrafficnoiseisthemainsourcethataffectsindooracousticqualityandhealth.VentilationandoutdoornoisepreventionbecomeapairofcontradictionsfortheresidentsinChinanowadaysforthosebuildingsadjacenttoheavytrafficroads.Itisinvestigatedthattrafficnoiseemissionismainlycon-stitutedbythemotorsoftrucks,busesandmotorcyclesaswellasbrake.Inthispaper,twomethodsoftrafficnoisereductionontheindoorsoundenvironmentandcomfortarecarriedouttostudyandcomparetheresidentialbuildingsadjacenttoheavytrafficroadwayinacity.Oneistoinstallnoisebarriersonthetwosidesoftheroadway,whichconsistofsound-proofglassandplas-ticmaterials.Theeffectofsound-insulationofthismethodisheavilydependentontherelativedistancebetweenthenoisebar-rierandindoors.Areductionofsoundwithanaveragepressurelevelof2–15dBisachievedontheplacesbehindandunderthenoisebarrier.However,fortheequivalentofnoisebarrierheight,thenoisereductioneffectislittle.Asfortheplacesofhigherthanthenoisebarrier,thetrafficnoisewillbeevenstrengthenedby3–7dB.Noiseincrementcanbeseenatthepointsofdistancefartherthan15mandheightmorethannoisebarrier;thenoisereductioneffectisnotsatisfactoryorevenworsened.Inaddition,noteverylocationisappropriatetoinstallthenoisebarrieralongtheheavytrafficroads.Theothermethodofnoisereductionforthebuildingsadjacenttoheavytrafficistoinstalltheairproofandsoundproofwindows,whichistheconversionfromnaturalventi-lationtomechanicalventilation.Areductionofsoundwithanaveragepressurelevelof5dBto17dBcanbeachievedcomparedwithcommonglasswind

简介：Inthepresentresearchtwodifferentwholevehiclemultibodymodelsareestablishedrespectively,includingrigidandrigid-flexiblecouplingmultibodyvehiclemodels.Theformerisallcomposedbyrigidbodieswhileinthelatermodel,theflexiblerearsuspensionisbuiltbasedonthefiniteelementmethod(FEM)andmodesuperpositionmethod,inwhichthedeformationsofthecomponentsareconsidered.Theridesimulationswithdifferentspeedsarecarriedoutona3Ddigitalizedroad,andtheweightedrootmeansquare(RMS)ofaccelerationsontheseatsurface,backrestandatthefeetarecalculated.Thecomparisonbetweentheresponsesoftherigidandrigid-flexiblecouplingmultibodymodelsshowsthattheflexibilityofthevehiclepartssignificantlyaffectstheaccelerationsateachposition,anditisnecessarytotaketheflexibilityeffectsintoaccountfortheassessmentofridecomfort.更多还原

简介：只有在旅途中，我才会有写blog的欲望．现在我正在上海重庆的飞机上，所以立刻打开笔记本开始blog．第一篇blog当然写最cool的宝贝，这次坐飞机是我有生以来坐的最“安静”的飞机，飞机发动机的轰鸣声似乎已经从我的世界里消失了，只留下淡淡的背景嘶嘶声。如果我打开CD，美妙的

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