简介：<正>IntroductionDeafnessisoneofthemostcommonotologicdiseasesandamajordiseasethatgreatlyimpactstheChinesepopulation.FromtheSecondNationalSampleSurveyofDisabledPersons,itisestimatedthatthereare27,800,000hearingdisabledpersonsinChina,about2.14%of

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简介：

简介：

简介：整体的一个混血儿实验模式分解和实验模式分解(EEMD-EMD)被介绍诊断阀门耳光颤动信号，它相对一台柴油机引擎在最高的死了的中心(TDC)附近给出的主导的燃烧敲击颤动信号。EEMD-EMD分解的内在的模式功能(IMF)的时间频率代表被适应概括S变换(AGST)获得。A类型493柴油机引擎被用于实验，并且结果显示柴油机引擎的阀门耳光是严肃的，并且颤动频率比燃烧敲击高。与EEMD-EMD-AGST途径，阀门耳光能被柴油机引擎的颤动分析识别。

简介：ThisstudyexaminestheseasonalvariationsoftropicalcyclogenesisovertheSouthChinaSea(SCS)usingagenesispotential(GP)indexdevelopedbyEmanuelandNolan.Howdifferentenvironmentalfactors(includinglow-levelvorticity,mid-levelrelativehumidity,verticalwindshear,andpotentialintensity)contributetothesevariationsisinvestigated.CompositeanomaliesoftheGPindexareproducedforthesummerandwintermonsoonsseparately.ThesecompositesreplicatetheobservedseasonalvariationsoftheobservedfrequencyandlocationoftropicalcyclogenesisovertheSCS.Thedegreeofcontributionbyeachfactorindifferentregionsisdeterminedquantitativelybyproducingcompositesofmodifiedindicesinwhichonlyoneofthecontributingfactorsvaries,withtheotherssettoclimatology.OverthenorthernSCS,potentialintensitymakesthelargestcontributionstotheseasonalvariationsintropicalcyclogenesis.OverthesouthernSCS,thelow-levelrelativevorticityplaystheprimaryroleintheseasonalmodulationoftropicalcyclone(TC)genesisfrequency,andtheverticalwindshearplaysthesecondaryrole.ThermodynamicfactorsplaymoreimportantrolesfortheseasonalvariationsintropicalcyclogenesisoverthenorthernSCS,whiledynamicfactorsaremoreimportantintheseasonalmodulationofTCgenesisfrequencyoverthesouthernSCS.