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简介：Aprogramincorporatingtheparallelcodeoflargeeddysimulation(LES)andparticletransportationmodelisdevelopedtosimulatethemotionofparticlesinanatmosphericturbulentboundarylayer(ATBL).Amodelofparticlesof100-micrometerordercouplingwithlargescaleATBLisproposed.Twotypicalcasesarestudied,onefocusesontheevolutionofparticleprofileintheATBLandthelandingdisplacementofparticles,whereastheotheronthemotionofparticlestream.

简介：垂直积云动量运输是在热带空气的重要物理进程并且在热带大气的系统的进化起一个关键作用。这篇论文在二个全球气候模型(GCM)在Madden-Julian摆动(MJO)模拟上集中于垂直积云动量运输的影响。Tiedtke积云parameterization计划被用于两GCM[CAM2并且光谱LASG/IAP(SAMIL)的大气的一般发行量模型]。MJO模拟能力可能被垂直积云动量运输通过积云parameterization计划影响，这被发现。然而，在不同模型的垂直动量运输的使用提供不同结果。以便改进模型的MJO模拟能力，我们必须以一个更合理的方法介绍垂直积云动量运输进模型。而且，parameterization的连贯和内在的模型也需要被考虑。

简介：通过本地城市的水路，从城市的表面的木质的碎片的运输很好没被理解到收缩和阻塞风险地点。当碎片运动上的有影响的因素，和大木质的碎片运动用时间系列摄影，活跃异频雷达收发机，和场地调查在自然农村环境被跟踪了，斜槽选拔赛识别了碎片和水路尺寸。用新奇被动异频雷达收发机技术，小木质的碎片通过一条城市的案例研究水路被跟踪了在城市的碎片运输上建立关键有影响的因素。通过把城市的碎片运输详细合并到来源和免职过程，城市的碎片运输的一幅完全的图画能被创造，支持有效水道电缆和垃圾屏幕设计，水路维护和阻塞风险评价。这案例研究在水路深度和速度以外的因素在在一条城市的水路以内的碎片运动是有影响的热点。在上游的碎片尺寸和来源地点被显示显著地影响潜力让碎片到达下游的收缩，说明在讨厌的东西流动碎片阻塞风险的可能的距离限制。

简介：Athree-dimensionalnumericalmodel,EFDC(environmentalfluiddynamicscode)isappliedtothePamlicoRiverEstuary(PRE)ineasternNorthCarolinaoftheUnitedStatestoexaminethewindimpactonpollutantagedistributionsandresidencetime.Aseriesofmodelexperimentsrepresentingbasecase,remote-wind-inducedwaterlevelset-upandlocalwindscasesareconducted.ModelresultsindicatethatthepollutantmeanageandthesystemresidencetimearefunctionsofgravitationalcirculationinthePRE.Thesystemresponsestoremote-wind-inducedwaterlevelset-uparedifferentindifferentportionsofthePRE.Undersuchcondition,dissolvedsubstancesintheupstreamportionofthePREhaveayoungerageandshorterresidencetime(comparedwiththebasecase),bycontrast,theyhaveaolderageandlongerresidencetimeinthedownstreamportionofthePRE.Upriveranddownriverlocalwindsappeartohaveoppositeimpactsonpollutantagedistributions.ThesubstancesareretainedmuchlongerwithinthePREunderupriverwindthanthoseunderdownriverwind.Themodelresultsalsosuggestthatacross-riverwindsmayleadtolongerresidencetimethroughenhancedturbulencemixing,whichslowsdownthegravitationalcirculationinthePRE.

简介：冰盖子的存在与一个冰季节的年度出现在区域为河在沉积运输和隧道形态学上有重要效果。沉积运输和表面冰的相互作用糟糕被理解。在这份报纸，从存在斜槽的数据试验，有流动和沉积运输的一个有限范围的各个调节，被分析。如果流动强度以床被表示，分析证明在盖住冰的隧道的床负担运输能被常规关系为相等的免费表面的流动描述砍应力。修改的A考虑到速度和狂暴的散开上的冰盖子的效果被显示为计算推迟的沉积运输分泌物适用，唤醒明确的表达。

简介：Electricalconductionbehaviorofpristineandiodinedopedpolyetherimides(PEI)hasbeeninvestigatedunderbothtransientandsteadystateconditionsintheoperatingtemperaturerange50-200℃atvariouselectricfieldsof12-60kV/cm.Thetransientcurrentsshowthehyperbolicdecaycharacter,andthedecayexponentp(ameasureofcurrentdecayrate)decreaseswithtemperature(7)anddopingconcentration.Theoriginoftransientcurrentshasbeenattributedtothedipolarnatureofcarbonyl((?)C=O)groupsandtheetherlinkagespresentinthemainchainofPEI.Thelowfieldsteadystateconductionisohmicinnature.Themagnitudesofionicjumpdistance(a)valuesdonotfavoranionictypeofconductionasapossibleconductionmechanisminpristineaswellasiodinedopedPEI.TheSchottkycoefficientsestimationsdonotshowthepossibilityofSchottkytypeorPoole-Frenkeltypeconductionmechanismsinthelowtemperatureregion(<120℃),however,inthehightemperatureregion(>120℃)thereisacertainpossibilityofPoole-Frenkeltypeconductionmechanisminbothpristineandiodinedopedsamples.Thedualslopeinthe1gIversus1/Tcurvesforiodinedopedsamplesindicatesthepresenceofmorethanonetypeoftrappinglevels.

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简介：Thetwo-dimensionalnumericalsimulationofenergytransportforMOSFETsispresented,inwhichtheeffectofgeneration,recombinationandtemperaturegradientofcarriersonthecharacteristicsofdevicesareconsidered.Animprovedmobilitymodelisalsoproposed.ThenumericalresultsofmicronandsubmicronMOSFETsshowthatthepresentmodelfitsexperimentverywell.

简介：固体加速长度在一张冷稠密的运输病床上被调查(0.10中间的

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简介：Moeculardynamicssimulation(MDS)isusedtostudythethermodynamicpropertiesandtransportcoefficientsofanargonsystemwithLennend-Jonespotential.Theresultsonthevelocitydistribution,meanfreepath,meancollisontime,specificheatandself0diffusioncoefficientagreewellwiththeexistingtheoretical/experimentaldata,Itshowsthatmoleculardynamicsmethodisanotherbridgetoconnectmicroworldandmacreoworld.

简介：ＴｒａｎｓｐｏｒｔａｎｄｐｌａｎｎｉｎｇｉｓｕｅｓｏｆｔｈｅＰａｒｉｓＲｅｇｉｏｎ：ａｑｕｅｓｔｉｏｎｏｆｓｕｓｔａｉｎａｂｉｌｉｔｙＷＯＮＧＴａｉ－ＣｈｅＤｉｖｉｓｉｏｎｏｆＧｅｏｇｒａｐｈｙＮａｎｙａｎｇＴｅｃｈｎｏｌｏｇｉｃａｌＵｎｉｖｅｒｓ...

简介：Basedonlong-termmeasurementsatthreegaugingstations,Toudaoguai,FuguandHequ,andonemeteorologicalstation,thisarticlediscussesthefeaturesofdischarge(Q)andsedimentconcentration(CS)ofariverreachoftheYellowRiverwithareservoirlocatedintheLoessPlateau.Theimpactsofthelocalsub-watershedbetweenToudaoguaiandFugugaugingstationsonsedimentbudgettotheYellowRiverhavebeenanalyzed.Inaddition,thedepositionprocessesintheTianqiaoReservoirhavebeeninvestigated.Resultsshowover80%oftheprecipitationthatfallsinthelocalsub-watershedisunabletocontributetotheYellowRiverrunoffprocess.Itisfoundthattheannualmaximumsedimentconcentrationisusuallylessthan30kg/m3duringfloodseasonsatToudaoguaiGaugingStation,butthesedimentconcentrationvariesdramaticallyatFuguGaugingStation.About35%ofthesedimenterodedinthesub-watershedsbetweenToudaoguaiandFugugaugingstationswasproducedfromtheHuangfuchuansub-watershedwhichhasadrainageareaaccountingonlyfor10%ofthedrainageareabetweenToudaoguaiandFugugaugingstations.TheTianqiaoReservoirgenerallyhasdepositionduringthesummerfloodseason,andscouringduringthenon-floodseason.Onaverage,over85%ofdepositedsedimentinthereservoiroccursinthe12kmlonglowerreservoirreach.ThevolumeofannualdepositioninthereservoirmainlydependsonthevolumeofwaterfromthelocalregionbetweenHequandFugugaugingstations.

简介：Wetheoreticallyinvestigatethetransportpropertyofgraphenesurfaceplasmonpolaritons(GSPPs)oncurvedgraphenesubstrates.Thedispersionrelationship,propagationlength,andfieldconfinementarecalculatedbyananalyticalmethodandcomparedwiththoseonplanarsubstrates.Basedonourtheory,thebendofgraphenenearlydoesnotaffectthepropertyofGSPPsexceptforanextremelysmallshifttothelowerfrequencyforthesameeffectivemodeindex.ThefielddistributionsandtheeigenfrequenciesofGSPPsonplanarandcylindricalsubstratesarecalculatedbythefiniteelementmethod,whichvalidatesourtheoreticalanalysis.Moreover,threetypesofgraphene-guidedopticalinterconnectionsofGSPPs,namely,planartocurvedgraphenefilm,curvedtoplanargraphenefilm,andcurvedtocurvedgraphenefilm,areproposedandexaminedindetail.ThetheoreticalresultsshowthattheGSPPspropagationoncurvedgraphenesubstratesandinterconnectionswillnotinduceanyadditionallossesifthephase-matchingconditionissatisfied.Additionally,theextremetinysizeofcurvedgrapheneforinterconnectionatacertainspectrarangeispredictedbyourtheoryandvalidatedbythesimulationof90°turningofGSPPs.ThebendingeffectonthepropertyofGSPPsissystematicallyanalyzedandidentified.OurstudieswouldbehelpfultoinstructdesignofplasmonicdevicesinvolvingcurvedGSPPs,suchasnanophotoniccircuits,flexibleplasmonic,andbiocompatibledevices.

简介：Thetransportofdangerousgoodsalwaysrepresentsapotentialrisktolife,humanhealth,property,andenvironmentalprotection.Forthisreasonandinordertopreservethelivesandhealthoftheparticipantsinthetransportprocess,adequateprotectionmeasuresmustbetakenbefore,during,andafterthetransportofdangerousgoods.Sincetherailwayitselfisarecipientofdangerousgoodsthatareessentialforitsownoperation,andisalsoacarrieroflargequantitiesofvariousdangerousgoods,thesemeasuresareofparamountimportance.Thispaperexamines,fromapointofviewoftheprotectionoflivesandhealthoftheparticipantsinthetransportprocessandthesafetransportofdangerousgoods,theconditionsofshipmentandtransportofdangerousgoods,theobligationsoftheparticipants,andtheessentialwaysfortheirproperhandling.Properapplicationofsafetyatworkpreventsimpromptuandindolentattitudeintransportingdangerousgoods,thuscontributingtoprotectionofpeoplelivesandhealth.Finally,thispaperincludespreventivemeasuresandbasicprinciplesforimplementationofsafetyatworkinthetransportofdangerousgoods.

简介：Theresultsofmathematicalmodellingofunsteadyflowconditionscoupledwithspecificsedimenttransportrelationsarepresentedhere.SimultaneoussolutionsofthedeSaintVenantequationswiththreedifferenttransportrelations,namelytheEngelund-Hansenequation,Grafequation,andanempiricalequationarepresented.TheresultsobtainedwerecomparedwiththosefromtheFluvial-12programunderthesameinputconditionsandreasonablecorrelationwasobserved.Theadvantagesofthecoupledmethodforsimultaneoussolutionoftheequationscompriseahigherdegreeofaccuracy,thepossibilityofintroductionofanydesiredtransportequationintothemodelandthepossibilityofintroducinganyboundaryconditionsintothemodelalongsideacompleteunsteadyflowmodelling.

简介：在这篇评论文章，我们在场为在nanodevices的短暂电子动力学的一个非平衡量运输理论在费米子与路径积分方法基于准确主人方程发源协调状态的表示。把准确主人方程用于nanodevices，我们也与Keldyshnonequilibrium格林功能建立减少的密度矩阵和短暂的量运输电流的连接。理论使我们能从接触与背反应效果在nanostructures学习短暂的量运输，与non-Markovian驱散和decoherence充分被考虑。在应用程序，我们利用理论到特定的量运输系统，许多量decoherence和量包含non-Markovian存储器效果的运输现象在接触的任意的起始的温度在短暂、静止的情形被调查。

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