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简介:Chinaachievedmajorprogressinlow-carbondevelopmentduringtheperiodofthe11thFiveYearPlan(2006-2010).Theincreasingtrendofenergyintensityandcarbonintensityoftheeconomyasseenpriorto2005wasreversedtoasharpdecreasingtrend,leadingtoa19%decreaseinenergyintensityand21%decreaseincarbonintensityinfiveyears.Theenhancedenergyefficiency,mostlyduetoefficiencyimprovementinpowerandmanufacturingsector,isthemajordriverofthedecreaseincarbonintensityoftheeconomy.Thedevelopmentofrenewableenergy,despiteitsimpressivegrowthrate,playedaminorrolebecauseofitssmallshareintheenergymixofthecountry.Energycon-sumptionandenergy-relatedcarbonemissionsperunitofareainbuildingcontinuedtogrowatalesserrate,which,combinedwiththefastgrowthoftotalbuildingvolume,ledtofastgrowthintotalenergyconsumptionandcarbonemissionsinthesector.Similartrendisobservedinthetransportationsectorwhosetotalenergyuseandcarbonemissionscontinuedtogrowfastdespiteslightimprovementinenergyefficiency.Agriculturalenergyuseexperiencedaslightchangeandforestrymadeamajorcontributiontocarbonsinks.Policyandinstitutionalinnovationshelpedbuildasolidsystemofrulesforlow-carbondevelopment.Improvingcosteffectivenessofthesystemremainsamajorchallengeforthenextfiveyearplanperiod.
简介:ResultsofinelasticneutronscatteringexperinientsandabinitiomoleculardynamicssimulationsforGeTe一theparentcompoundofphase-changematerialsarereported.TheinelasticneutronspectraofGeTepowdersampleshavebeendeterminedinthetemperaturerangeextendingfrom300to700K.Thephononpeaksundergothermalshiftsresultingfromanharmoniceffectsbeingweakerforacousticthanopticmodes.AsmallconcentrationoffreechargecarriesarisingfromthepresenceofGe-vacancieswasfoundnottoaffectsignificantlytheneutronweightedphonondensitiesofstatesofGeTe.Thespectralpatternchangesqualitativelyacrossthestructuralphasetransition,butthelocalstructureofGeTeremainshardlyaffected,asconfirmedbytheanalysisoftemperaturedependenceofthepairdistributionfunctionobtainedfromabinitiomoleculardynamicsinvestigations.Thepresenttheoreticalstudiessupportinawideextentourexperimentalobservationsandalsothoseprovidedbylocalprobemethods.
简介:Anumericalsimulationisperformedtofindoutakeyvorticalstructureinthelaminar-turbulenttransition.Alow-speedstreakisgeneratedinsidealaminarboundarylayerusinganisolatedcuboidroughness,aimedatprovidinganenvironmentunstabletoouterdisturbances.Then,ashortdurationjetisissuedintotheboundarylayer.Whenthejetvelocityislow,somevorticesappearintheboundarylayer,butthetransitionoftheboundarylayerdoesnottakeplace.However,whenthejetvelocityexceedsacertainthreshold,twovorticesnewlyappearabovetheelongatedlegsofaV-shapedvortexandonlyoneofthemisstretchedandsurvives.Afterthat,vorticesaregeneratedoneafteranotheraroundthesurvivedone.Bycomparingthedecayedandthesurvivedvortices,itisfoundthatthedifferenceintheirheightsisthekeycharacteristicwhichleadstothetransition.
简介:Apiece-wisetransitiondetectionalgorithmthatperformsdisplacementmeasurementsforself-mixingsensorsisdeveloped.Thealgorithmcancorrectlydetectself-mixingfringesatalowsignal-to-noiseratiointhepresenceofdisturbanceswithoutfiltering.Displacementreconstructionsbythephaseunwrappingmethodbasedonthisalgorithmareexperimentallyvalidated,withlasersubjecttothemoderatefeedbackregime.
简介:OnthebasisofthesoundvelocitymeasurementsofthecoralreefcorefromNanyongNo.1wellofYongshuReefintheNanshaIslands,thepaperstudiestherelationsbetweentheverticalsoundvelocitytransitionfeaturesinthecoralreefcoreandthecorrespondingstratigraphicdepositionalfacieschangeaswellasstratigraphicgapoferosion,analysesthecauseofthesoundvelocitytransition,expoundstheconcreteprocessofthesealevelchangeresultinginthestratigraphicgapoferosionandfacieschangeinthecoralreefandexplainstherelationsbetweentheverticalsoundvelocitytransitioninthecoralreefcoreandthecorrespondingstratigraphicpaleoclimateandthesealevelchange.ThisstudyisofimportantpracticalvalueandtheoreticalsignificancetotheislandandreefengineeringconstructionandtheacousticloggingforoilexplorationinthereeflimestoneareaaswellasthepaleoceanographicstudyofthemarginalseainthewestermPacificOcean.
简介:Temporalmodedirectnumericalsimulationwasdonefortheprocessoflaminar-turbulenttransitioninanincompressibleboundarylayeronaflatplate.Theanalysisoftheresultsshowedthatduringthebreakdownprocessoflaminar-turbulenttransition,themodificationofthemeanflowprofilebythedisturbancesledtoaremarkablechangeinitsstabilitycharacteristics,manifestedinthesignificantenlargementofthelinearunstablezoneandthemaximumamplificationrate,andledtothatmanymoredisturbanceswereexcitedandenhancedrapidly,correspondinglytheturbulentenergyalsoincreasedrapidly,andthemeanflowprofilesevolvedswiftlyfromlaminartoturbulent.Itwasalsofoundthatiftheobliquewavesintheinitialdisturbancesdidnotformsymmetricalpairs,thesubsequentspan-wisemeanvelocitieswould,ingeneral,benonzeroduetononlinearinteraction,whichwouldhaveagreateffectonthestabilitycharacteristicsandalsoimpliedthattheturbulenceobtainedbydirectnumericalsimulationmightnotbefullyarandomprocess.
简介:AbstractAcute kidney injury (AKI), characterized by acute renal dysfunction, is an increasingly common clinical problem and an important risk factor in the subsequent development of chronic kidney disease (CKD). Regardless of the initial insults, the progression of CKD after AKI involves multiple types of cells, including renal resident cells and immune cells such as macrophages. Recently, the involvements of macrophages in AKI-to-CKD transition have garnered significant attention. Furthermore, substantial progress has also been made in elucidating the pathophysiological functions of macrophages from the acute kidney to repair or fibrosis. In this review, we highlight current knowledge regarding the roles and mechanisms of macrophage activation and phenotypic polarization, and transdifferentiation in the development of AKI-to-CKD transition. In addition, the potential of macrophage-based therapy for preventing AKI-to-CKD transition is also discussed.
简介:AIM:ToexplorethemolecularmechanismsinlensdevelopmentandthepathogenesisofPetersanomalyinSmad4defectivemice.METHODS:Le-CretransgenicmouselinewasemployedtoinactivateSmad4inthesurfaceectodermselectively.PathologicaltechniqueswereusedtorevealthemorphologicalchangesoftheanteriorsegmentinSmad4defectiveeye.ImmunohistochemicalstainingwasemployedtoobservetheexpressionofE-cadherin,Ncadherinanda-SMAinanteriorsegmentofSmad4defectivemiceandcontrolmiceatembryonic(E)day16.5.Real-timequantitativepolymerasechainreaction(qPCR)wasperformedtodetecttheexpressionofSnail,Zeb1,Zeb2andTwist2inlensofSmad4defectivemiceandcontrolmiceatE16.5.RESULTS:ConditionaldeletionofSmad4oneyesurfaceectodermresultedincorneaidysplasia,iridocornealangleclosure,corneolenticularadhesionsandcataractresemblingPetersanomaly.LossofSmad4functioninhibitedE-cadherinexpressioninthelensepitheliumcellsandcorneaiepitheliumcellsinSmad4defectiveeye.ExpressionofN-cadherinwasupregulatedincorneaiepitheliumandcorneaistroma.BothE-cadherinandN-cadherinweredown-regulatedatthefuturetrabecularmeshworkregioninmutanteye.TheqPCRresultsshowedthattheexpressionofTwist2wasincreasedsignificantlyinthemutantlens(P<0.01).CONCLUSION:Smad4isessentialtoeyedevelopmentandlikelyacandidatepathogenicgenetoPetersanomalybyregulatingepithelial-mesenchymaltransition.Twist2canberegulatedbySmad4andplaysanessentialroleinlensdevelopment.
简介:Objective:Theaimofthepresentstudywastoanalyzetheprognosticfactorsinpatientswithhepatoblastoma(HB)inoursinglecenterandtoevaluateperiostin(POSTN)expressioninHBanditsassociationwithclinicopathologicalvariables.Inaddition,theunderlyingmechanismofhowPOSTNpromotesHBprogressionwasdiscussed.Methods:POSTNexpressionwasinvestigatedinHBtumorsbyimmunohistochemistry(IHC),immunofluorescence(IF)andWesternblot(WB).TheassociationamongPOSTNexpression,clinicopathologicalfeaturesandoverallsurvival(OS)wasalsoevaluated.ThemigrationandadhesionabilityofHBcellsweremeasuredusingchemotaxisandcell-matrixadhesionassays,respectively.Epithelial-mesenchymaltransition(EMT)-associatedmarkersandactivationoftheERKpathwayweredetectedbyWB.Results:HBpatientshadpoorprognosiswhichdisplayedlymphnodemetastasis,vascularinvasion,POSTNandvimentinexpression.POSTNexpressionwasalsoassociatedwithlymphnodemetastasis.Furthermore,overexpressedPOSTNpromotedmigrationandtheadhesiveabilityofHBcellsinvitro.Inaddition,wedemonstratedthatPOSTNactivatedtheMAPK/ERKpathway,upregulatedtheexpressionofSnailanddecreasedtheexpressionofOVOL2.Finally,POSTNpromotedtheexpressionofEMT-associatedmarkers.Conclusions:POSTNmightmodulateEMTviatheERKsignalingpathway,therebypromotingcellularmigrationandinvasion.OurstudyalsosuggeststhatPOSTNmayserveasatherapeuticbiomarkerinHBpatients.
简介:Theelectromechanicalphasetransitionforadielectricelastomer(DE)tubehasbeendemonstratedinrecentexperiments,whereitisfoundthattheunbulgedphasegraduallychangedintobulgedphase.Previoustheoreticalworksonlystudiedthetransitionprocessunderpressurecontrolcondition,whichisnotconsistentwiththerealexperimentalcondition.Thispaperfocusesonmorecomplexfeaturesoftheelectromechanicalphasetransitionunderinternalpressureofconstantmass.WederivetheequilibriumequationsandtheconditionforcoexistentstatesforaDEtubeunderaninternalpressure,avoltagethroughthethicknessandanaxialforce.Wefindthatundermasscontrolconditionthevoltageneededtomaintainthephasetransitionincreasesastheprocessproceeds.Weanalyzetheentireprocessofelectromechanicalphasetransitionandfindthattheevolutionofconfigurationsisalsodifferentfromthatforpressurecontrolcondition.
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简介:有100,200和300祷告的链长度的单个聚合物链的结构的转变被平行temperingMD模拟调查。我们的模拟结果能与减少的温度从随机的卷捕获结构的变化到orientationally订的结构。清楚的转变作为温度的功能在旋转和全球orientational顺序参数P的半径的曲线上被观察,它表明了单个聚合物链的结构的形成。在旋转Rgx的方形的半径的三个部件之间的线性关系2,Rgy2,Rgz2并且全球orientational顺序P能在在结构上transformational过程下面被获得。在x之间的线性关系的斜坡(或Y轴)部件Rgx2(或Rgy2)并且P是否定的,当时Rgz,2作为P的功能是积极的。斜坡的绝对值与链长度成正比。一旦单个聚合物链拿随机的卷或订的配置,线性关系是无效的。conformational变化也在显微镜的规模上被分析。聚合物链能被当作由灵活的环连接的僵硬的茎的构造。从茎长度分发的指数地减少的行为的偏差变得突出,显示一链使硬产生导致与减少的温度处于trans状态结束的越来越多的片断。茎长度Ntr是大约21张契约显示聚合物链与特定的褶层长度被订。那么,模拟结果,显示出液体水晶的聚合物链的原型,是有用的理解水晶的聚合物的结晶化过程。