简介：Theformationofatropicalcycloneistheresultofaprocessinwhichaninitialdisturbanceevolvesintoawarm-corelow-pressuresystem;however,theoriginoftheinitialdisturbanceandthefeaturesoftheinitialfieldsareoverlookedinmostexistingtheories.Inthisstudy,basedonFY-2CbrightnesstemperaturedataandtheJapanreanalysisdataset,theoriginandevolutionofthetropicaldisturbancethatbecameTyphoonFung-Wong(2008)wereexamined.Theresultsdemonstratedthattheinitialdisturbanceemergedwithinasaddle-typefieldwithlargeverticaltroposphericwindshear.Theverticalwindsheardecreasedwiththeadjustmentoftheuppercirculation;moreover,accompaniedbyconvectionoverthewarmsectionaroundtheuppercoldvortex,itprovidedfavorablethermalanddynamicconditionsforthedevelopmentofatropicalvortex.Duringitsdevelopment,thezoneofassociatedpositiverelativevorticitystrengthenedanddescendedfromthemid-tropospheretolowerlevels.Thisrapidstrengtheningoflower-levelvorticitywasduetoincreasingconvergencerelatedtotheintensificationofthepressuregradientsouthwestofthesubtropicalhigh.ThisindicatedthattheuppercoldvortexandWestPacificsubtropicalhighplayedveryimportantrolesinthiscase.

简介：Thedeactivationbehaviorbycrystallitegrowthofnickelnanoparticlesonvarioussupports(carbonnanofibers,zirconia,SiC,α-Al_2O_3andγ-Al_2O_3)wasinvestigatedintheaqueousphasereformingofethyleneglycol.SupportedNicatalystsof~10wt%werepreparedbyimpregnationofcarbonnanofibers(CNF),ZrO_2,SiC,γ-Al_2O_3andα-Al_2O_3.TheextentoftheNinanoparticlegrowthonvarioussupportmaterialsfollowstheorderCNF~ZrO_2>SiC>γ-Al_2O_3>>α-Al_2O_3whichsequence,however,wasdeterminedbytheinitialNiparticlesize.Basedontheobservednickelleachingandthespecificgrowthcharacteristics;theparticlesizedistributionandtheeffectofloadingonthegrowthrate,Ostwaldripeningissuggestedtobethemainmechanismcontributingtonickelparticlegrowth.Remarkably,initiallysmallerNiparticles(~12nm)supportedonα-Al_2O_3werefoundtooutgrowNiparticleswithinitiallylargersize(~20nm).ItisputforwardthatthehighersusceptibilitywithrespecttooxidationofthesmallerNinanoparticlesanddifferencesininitialparticlesizedistributionareresponsibleforthisbehavior.

简介：到一架飞机上的起始的内部核心的结构的TC增强和轨道的敏感用一个数字模型被调查。结果证明有大内部核心的风(CVEX终止)的旋涡与小内部核心的风(CCAVE终止)比那经历更早的增强，但是他们将近在旋转起来以后有一样的增强率。在早阶段，与表面热流动联系的对流房间主要在CVEX终止在内部核心的区域以内被限制，而在CCAVE终止的旋涡与大多数由于效果在外部核心的区域被开始到东北的对流旋涡展出更加不对称的结构。在CVEX终止的大内部核心的惯性的稳定性能从到动能的对流加热在变换推动高效率。另外，在在主要eyewall外面的内部核心的区域的许多更强壮的拉紧变丑和PBL不平衡比在CCAVE终止，它在CVEX-EXP.对快速的axisymmetrization和早增强导致在CVEX终止的TC轨道在整个集成支撑向西北的排水量的在CVEX终止在起始的发展阶段期间续起，而当不对称的结构是主导的时，在CCAVE终止的TC经历向东北的反弯。由于到在CCAVE终止的TC中心的东北的提高的不对称的传送对流，一双第二等的旋回在大规模主要旋回形式以内嵌入，它调制通风流动并且因此驾驶TC移动向东北。

简介：这份报纸调查与轨道预报了使用全球/地区性的吸收和预言系统(葡萄)的热带气旋(TC)联系的错误的可能的来源。葡萄预报在2008和2009个季节期间在西方的诺思太平洋盆为16landfallingTC被做，与72个小时的预报长度，并且使用缺省起始的条件(initials，此后)，它从NCEP-FNL数据集，以及ECMWFinitials。预报与ECMWF预报相比。当与缺省initials相比使用ECMWFinitials时，结果证明在大多数TC，GRAPES预报被改进。与ECMWFinitials相比，缺省initials生产更低的紧张TC和更低的紧张副热带的高度，而是更高的紧张南亚高度和季风马槽，以及更高的温度但是在TC中心的更低的特定的湿度。有ECMWFinitials在并且在在起始的时间的TC中心附近的geopotential高度和风地的代替被发现是改进预报的最有效的方法。另外，在预报精确性显示出最大的改进的TC通常在TC紧张有最大的起始的无常并且通常在加强的阶段。结果为用葡萄做的TC轨道预报表明起始的紧张的重要性，并且显示模型在比TC的腐烂的阶段描述加强的阶段更好。最后，改进的限制显示与葡萄预报联系的模型错误可以是landfallingTC的差的预报的主要原因。因此，模型错误的进一步的考试被要求。

简介：BackgroundTheearlyendothelialdysfunctionofcarotidarteryinpatientswithtype2diabetesmellitus(T2DM)hasbeenrecognized.However,thefeasibilityandsignificanceofcarotidarteryendothelialdysfunctiondetectedbyultrasoundradio-frequencytechnologyhasbeenseldomstudied.MethodsThe2Dultrasoundimagesofthebilateralcommoncarotidarteriesfrom112casesofT2DMpatientsand50casesofnormalsubjectsinourhospitalwerecollectedtomeasureintima-mediathicknessmeans(IMTm),end-systolicinnerdiameter(Ds),end-diastolicinnerdiameter(Dd),resistanceindex(RI),pulseindex(PI),andthesystole/diastoleratio(S/D).Wealsoobservedthevariationoftheintima-mediathickness(IMT)aswellastheelasticityindexesofthecommoncarotidartery,suchasthecompliancecoefficient(CC),elasticitycoefficient(β),pulsewavevelocity(PWV)andaugmentationindex(AIx)throughinstrumentswithbuilt-inultrasoundradio-frequencytechniques,includingquantitativeintima-mediathickness(QIMT)andquantitativeanalysisofarterialstiffness(QAS).Thedifferencesoftheabove-mentionedparametersbetweenthetwogroupswereanalyzed.ResultsTherewerenostatisticallysignificantdifferencesinIMTm,Ds,Dd,RI,PIandS/DraitoofthecommoncarotidarteriesbetweengroupT2DMandthenormalgroup(P>0.01).Theβ,PWVandAIxingroupT2DMwereremarkablyhigherthanthoseinthecontrolgroup,withCCvaluebeingsignificantlylowerthanthelater(P<0.01or0.05).ConclusionUltrasoundradio-frequencytechniqueoffersearlierandmoreeffectiveevaluationofcarotidarteryendothelialdysfunctioninT2DMpatientswhencomparedwithconventional2Dultrasound,establishingimagingfoundationfortheearlypreventionandtreatmentofcardio-cerebrovascularcomplicationsinT2DMpatients.