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简介：UsingtheNationalCenterforEnvironmentalPredictionreanalysisdataon1.0°×1.0°gridsanddatafromtheTropicalCycloneyearbook(2000),adiagnosticanalysisandnumericalsimulationwereperformedtoinvestigatethecharacteristicsandmechanismunderlyingtherapidweakeningoftyphoonXangsane.TheresultsshowthatasharpdeclineintheintensityoftyphoonXangsaneresultedfromitsmovementintothecoolseasurfacetemperatureareaintheEastChinaSea,theintrusionofcoldairfromthemainlandintothetyphoon,andarapidincreaseoftheverticalwindshearinthesurroundingenvironment.Animportantfactorthatledtothedemiseofthetyphoonwasasignificantdecreaseinthemoisturetransportintothetyphoon.Furthermore,theresultsofthenumericalsimulationandsensitivityexperimentsindicatethatseasurfacetemperaturelargelymodulatedtherapidweakeningoftyphoonXangsane.

简介：客观：导出施主的不成熟的树枝状的房间(imDC)的使用成为了一条有希望的途径导致有免疫力的忍耐或有免疫力的hyporesponsiveness。然而，导出施主的imDC需要被收获一些天并且在移植前在5-10天内输了进接受者，它在施主机关主要从死尸被收获的一个临床的背景实际上是不可能的。而且，导出施主的imDC可能被抵消导致的有免疫力的忍耐或有免疫力的hyporesponsiveness的allogeneic反应清除。在我们的学习，我们进一步探索了donor-antigen-unloaded导致的有免疫力的hyporesponsiveness的内在的机制由在肝移植前在1天内输这些imDC进老鼠的导出接受者的imDC。这份报纸是导出接受者的imDC和它在老鼠的肝接枝的保护到有免疫力的hyporesponsiveness的机制由donor-antigen-unloaded导致了的学习。方法：40只SD老鼠(施主)和40只男Wistar老鼠(接受者)随机被划分成4个组：控制，cyclosporineA(CsA)，成熟DC(mDC)，和imDC；带着为每个组的10只SD老鼠和10只Wistar老鼠。尖锐接枝拒绝的动物模型带着这些老鼠被建立。相应治疗在移植前后被给。在控制组，Wistar老鼠没接受除肝移植以外的处理。在CsA组，Wistar老鼠加CsA治疗经历了肝移植(10mg/kg湩?湵敮散獳牡?楴敭愠摮洠瑡牥慩獬椠?桴?潣牵敳漠?硥数楲敭瑮琠?敧?摩慥?浩条獥

简介：Companiesbearprimaryresponsibilityforlow-carboneconomy,thusrelevantlow-carbonpoliciesshouldbesetproperlytoguidethemandtoensuretheirlow-carbonproductioneffectively.Tosolvetheproblemsgeneratedduringlow-carbondevelopment,thisarticleverifiestheexistenceofthetransmissionpathandstrength.Thisverificationincludesmediatingvariablesofcompanies’willingnessandcapacitytoconductlow-carbonproduction,atransmissionmechanismthroughincentivepathandresourcesprotection,andquestionnairedataofagriculturalcompanies.Conclusionsshowthatthelowcarbonpolicieshaveobviouspositiveeffectsonwillingnessofcorporation;thebasicservice-orientedpolicyhasasignificantlypromotingeffectonlow-carbonproductioncapacity;andlow-carbonproductionperformanceispositivelyinfluencedbywillingnessaswellascapability.Aimingatabettertransmissionpath,somecorrespondingrecommendationshavebeenputforwardintheend.

简介：ThispaperinvestigatesthesolidificationbehaviouroftheAg—Cueutecticalloymeltundercooledupto100K.ItisrevealedthatlamellareutecticsgrowinadendriticformintheAg-Cueutecticmeltwithundercoolingequaltoorgreaterthan76K.Asundercoolingincreases,theremeltedfractionoftheprimaryeutecticsduringrecalescencerises.Thesevereremeltingandthesubsequentripeningoftheprimaryeutecticdendritesleadtotheformationofanomalouseutectics.

简介：Thecontrollableactivethermo-atmospherecombustor(CATAC)hasbecomeautilizableandeffectivefacilitybecauseitbenefitstheopticaldiagnosticsandmodeling.Thispaperpresentsthemodelingresearchoftheauto-ignitionandflamesoftheH2/N2(H2/CH4/N2,orH2/H2O2/N2)mixtureonaCATAC,andshowscurvesvaryingwithtemperaturesofauto-ignitiondelay,theheightofthesiteofauto-ignitionofliftedflames,andflamelift-offheight.Theresultsofauto-ignitiondelayandthelift-offheightarecomparedtheexperimentalresultstovalidatethemodel.Aturningpointcanbeseenoneachcurve,identifiedwithcriteriontemperature.Itcanbeconcludedthatwhentheco-flowtemperatureishigherthanthecriteriontemperature,theauto-ignitionandliftedflameofthemixturearenotstable.Conversely,belowthecriteriontemperature,themixturewillauto-igniteinastablefashion.Stabilizationmechanismsofauto-ignitionandliftedflamesareanalyzedintermsofthecriteriontemperature.

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简介：Adetailed3-DhailcloudnumericalmodelandparameterizationofmierophysiealprocessesweredescribedinPartⅠ(Hong1999)ofthisstudy.Inthispart,ahailcloudoccurringinXunyiarea.ShaanxiProvinceonJuly8,1997issimulatedbythemodeltoanalyzemechanismsofhailformationandhailsuppressionwithseeding.Theresultsshowthat97%ofhailembryosarefrozendrops.TheseedingexperimentswithAgIintermsofheightsshowthatiftheseedingismadebeforehailformation,theoptimumseedingpositionislocatedinthemaximumupdraftareaanditscenter,i.e.,AgIisseededinthezonewithhighwatercontenttobecoordinatedwithmaximumzoneoftheupdraft.Theseedingmakesconcentrationsofgraupelandfrozendropincreaseandtheiraveragemassorsizedecrease,sothattheproportionofconversionfromgraupelandfrozendropintohaildescendsgreatly,andthemassandconcentrationofhailstonearedecreasedtoachieveourpurposeforhailsuppression.

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简介：ByaddingmixtureofZrO2andcarbon,aZr-enhancedcompositecoatingwasproducedontoanAISI1045substratebylasercladding.Themicrostructureandphaseformation,microhardnessandwearresistanceofthecompositecoatingwerestudied.Theexperimentalresultsindicatethatthecompositecoatingwithmetallurgicalbondingtosubstrateconsistsof7-Ni,massiveceramicparticlesofZrC,NiZra,NiTZr〉（Fe,Ni）23C6andF%C.Theinsitu-synthesizedZrCparticlesareuniformlydispersedincompositecoating,whichrefinesthemicrostructureofcompositecoating.WithdifferentZrO2andcarbonaddi-tions,thepropertiesareimproveddifferently.Finally,thefineinsituZrCparticlesimprovethemicrohardnessofcompositecoatingtoHVo.2650,whichisnearly2.7timesthatofNi25coating.Also,thecompositecoatinghasanadvantageinwearresistance;itoffersbetterwearresis-tancewhenmoremixtureofZrO2andcarbonwasaddedinnickelalloys.

简介：Magnesiumoxide(MgO)nanowiresweresynthesizedonthegold-coatedSi(100)andMgO(100)substratesatlowertemperature(600℃)bypulsedliquidinjectionmetalorganicchemicalvapordeposition(MOCVD).Thegoldcatalystcouldbefoundonthetipsofnanowires,whichpresentsthevapor-liquid-solid(VLS)growthmechanism.Reactivespecies(oxygenormagnesium)havestrongeffectsonthegrowthofnanowires.Abundantreactivespecieskilltheverticallyalignednanowirestoberandomlyalignedonesorevenchangetheverticalgrowthmodetothehorizontalgrowthmodewithsurface-parallelnanowires.Usually,nanowireswithlargeraspectratio(>10,aspectratio=length/diameter),higherdensity(>500/μm2)andsmallerdiameter(≤20nm)canbeeasilysynthesizedwithlongerinjectionperiod(≥2s),smallerinjectionmass/period(≤4.6mg)andsuitableoxygenpartialpressure(2.4Torr).

简介：根据催化裂开的产品分发的分析和解释基于高酸粗略，为石油酸的去碳酸基的机制在FCC过程期间被讨论。质子从地点能与更否定的费用与羰基组的氧相结合形成能在弱契约受到劈开的反应中介的Bronsted酸发源，导致从它形成烷基的分解跟随的羧基的酸的羧基的组碎三坐标的carbenium离子，公司和H2O。象一个electrophilic试剂罐头酸的吊楔从羧基的酸的羧基的组到随后释放CO2。

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简介：Anovelbionicswarmintelligencealgorithm,calledantcolonyalgorithmbasedonablackboardmechanism,isproposedtosolvetheautonomyanddynamicdeploymentofmobilessensornetworkseffectively.Ablackboardmechanismisintroducedintothesystemformakingpheromoneandcompletingthealgorithm.Everynode,whichcanbelookedasanant,makesoneinformationzoneinitsmemoryforcommunicatingwithothernodesandleavespheromone,whichiscreatedbyantitselfinnature.ThenantcolonytheoryisusedtofindtheoptimizationschemeforpathplanninganddeploymentofmobileWirelessSensorNetwork(WSN).Wetestthealgorithminadynamicandunconfigurableenvironment.Theresultsindicatethatthealgorithmcanreducethepowerconsumptionby13%averagely,enhancetheefficiencyofpathplanninganddeploymentofmobileWSNby15%averagely.

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简介：Locomotionability,efficiencyandreliabilityarekeytargetsforagoodrobot.Thelinkagemechanismforrobotlocomotionisadiscontinuous-constraintmetamorphicmechanism.Herewesetupequationstopresentthediscontinuous-constraint,pointoutthatdrivingandcontrollingarethekeypointstoimprovetheperformanceandefficiencyofthelinkagemechanism.Inspiredbycontrollingstrategyofthemotornervoussysteminperipheralvertebraetothelocomotion,wedrawoffmotorcontrolanddrivestrategy.

简介：<正>Hamstringstrainsareoneofmostcommonsportsinjuries.Thepurposeofthisliteraturereviewistosummarizestudiesonhamstringstraininjuryrate,mechanism,andriskfactorsinthelastseveraldecadeswithafocusonthepreventionandrehabilitationofthisinjury.Hamstringinjurycommonlyoccursinsportingeventsinwhichhighspeedsprintingandkickingarefrequentlyperformed,suchasAustralianfootball.Englishrugby,Americanfootball,andsoccer.Basicsciencestudieshavedemonstratedthatamusclestraininjuryoccursduetoexcessivestrainineccentriccontractioninsteadofforce,andthatelongationspeedanddurationofactivationbeforeeccentriccontractionaffecttheseverityoftheinjury.Hamstringstraininjuryislikelytooccurduringthelateswingphaseandlatestancephaseofsprintrunning.Shortenedoptimummusclelength,lackofmuscleflexibility,strengthimbalance,insufficientwarm-up,fatigue,lowerbackinjury,poorlumbarposture,andincreasedmuscleneuraltensionhavebeenidentifiedasmodifiableriskfactorswhilemusclecompositions,age,race,andpreviousinjuriesarenon-modifiableriskfactors.Thetheoreticalbasisofsomeoftheseriskfactors,however,islacking,andtheresultsofclinicalstudiesontheseriskfactorsareinconsistent.Futurestudiesareneededtoestablishthecause-and-effectrelationshipsbetweenthoseproposedriskfactorsandtheinjury.

简介：Hebei省浓密地是有大多数的区域之一在中国的人口，最快的经济生长和很集中的陆地使用。陆地缺乏的矛盾与人口生长由高速度的经济开发削尖成为了一个严重问题，它限制了揭示的地区性的持续development.This纸基本进程，变化和严肃的地区性的差别在过去的50年期间根据可耕地的长系列的统计数据可耕地集中区域。根据提及的上面，影响可耕地的变化的主要驱动力被讨论。研究结果显示在最后50年期间有在可耕地区域的明显的波动减少的一个趋势。可耕地区域的变化从增加经历这个过程突然地减少轻轻地减少。在可耕地区域的变化的地区性的不同是很著名的，可耕地区域的严肃中心移动49.22km到东北。关于在可耕地的减少，直接驱动力包括农业结构和开垦的调整，并且间接驱动力在技术，经济兴趣和人口生长等等包括进展。

简介：Polymerizationofacrylonitrile(AN)inaqueousnitricacidinitiatedbypolypropylene-basedpolyamidoxime(PPAO)-thiourea(TU)combinationhasbeeninvestigated.Theoverallrateofpolymerization(R_p)undertheconditionsof[TU]/[PPAO]<0.5molarratioisThemolecularweightsofthepolymerswerefoundtobeinverselyproportionalto3/2-powerofnitricacidconcentrationand1-powerofthioureaconcentration.Inaddition,itisindependentwiththeconcentrationsofmonomerandPPAO,anddecreaseswithincreasingtemperature.Onthebasisoftheseexperimentalresults,acoordination-protontransfermechanismfortheinitiationwasproposedanddiscussed.

简介：Asimplemodelofchromatographicmechanicalmechanismispresent,andthenascricsoftheoreticalchromatographicequationsandfundamentalFormulaearederived.Thesetheoreticalequationsandformulaenotonlyreservethermodynamiccharacteristicsinthecurrentfundamentalchromatographicformulae,butalsointroduceoneormorekineticparameter,soitispossibletomakethemacroscopic-controlontheeffectofkineticcharacteristicsonchromatographicsystem.