简介：Basedontheexploratoryspatialdataanalysis(ESDA)techniqueandgeographicinformationsystem(GIS)platform,withstatisticdataofcountiesin2005,thispaperconfirmsthatthereisalargepopulationdensitygapbetweencountiesin2005becausetheGinicoefficientis0.55.Populationdistributiondoesnotchangealotduringthepastdecades,andthesoutheastChinaisstillmuchmoredenselypopulatedthanthenorthwestChina.TheglobalspatialautocorrelationofpopulationdistributionisobviousbecauseMoran'sIscores0.42andlocalspatialautocorrelationispartlysignificant.Climateandelevationarestillthemainnaturalinfluencingfactors.Meanwhileindustrialstructureandtransportationsignificantlyinfluencepopulationdistribution.Differentcombinationsofnaturalfactorshavedifferenteffectsonpopulationdistribution.Foralongterm,climateandterrainfactorstabilityaffectpopulationdistribution.Butitsinfluencewillbeweakenedbyprogressoftechnology.Economicdevelopmentisthemainfactorthatchangespopulationdistributionforashortterm.

简介：城市的簇在一个国家是工业和都市化的高水平的期望的产品，以及是在全球竞争的参予的基本单位。关于中国，城市的簇为增加中国都市化过程被认为是主导的形成。然而，迄今为止没有技术的重合、有效、可信的方法学的系统和集合识别中国城市的簇。这研究调查地理信息技术支持提供中国城市的簇的分发的更好的理解的一个计算机化的鉴定方法的潜力。鉴定方法在ArcInfo宏语言编程的帮助下基于一个地理信息数据库，一个数字举起模型，和社会经济的数据被执行。在方法，初步的边界根据交通可接近性被识别，并且最后的鉴定从在rasterized的帮助下在一个区域限制城市数字，人口，和GDP被完成社会经济的数据集。结果证明方法识别九中国城市的簇，即，珀尔河三角洲，更低的长江山谷，Beijing-Tianjin-Hebei区域，东北中国平原，中间的长江山谷，华中平原，西方的台湾海峡，Guanzhong和Chengdu重庆城市的簇。这研究代表包含中国城市的簇的计算机化的鉴定的第一研究。而且与另外的相关研究相比，研究途径，联合交通可接近性和社会经济的特征，被显示是识别城市的簇的一个不同、有效、可靠的方法。

简介：AdistributionmapofPinusyunnanensiswasmadeaccordingtothedataongeographicaldistributionofP.yunnanensisbymeansofapplyinggeographicinformationsystemssoftwareArcGIS,andtheclimaticparametersofthedistributionareasforP.yunnanensisweredeterminedbytheclimateforecastmodelClimateChina.TherelationshipbetweenthegeographicaldistributionofP.yunnanensisandtheclimatewasstudiedbyadoptingtheindexesofKiraincludingthewarmthindex(WI),coldnessindex(CI)andaridityindex(K),Xu’shumidityindex(HI),Holdridge’slifetemperature(BT),potentialevapotranspiration(PET),potentialevapotranspirationratio(PER)andthesinglefactorsasthemeanannualtemperature,themeantemperatureinJanuary,themeantemperatureinJuly,themeanannualprecipitation,the>5℃accumulatedtemperature,the>18℃accumulatedtemperature,themaximumtemperature,theminimumtemperature,thetemperaturevariation,theratiooftemperatureandprecipitationoftheyear,etc.AndtheKira’swater-temperatureindexesondistributionalupperlimit,lowlimitandnorthlimitwerediscussed.ThemajorclimaticfactorseffectingthedistributionofP.yunnanensiswerescreenedoutbystatisticalanalysissoftwareSPSSandtheresultsshowedtheimpactfactorsareintheorderoftemperature>humidity>thetemperaturedifferencebetweenmeanwarmestmonthtemperatureandmeancoldestmonthtemperature.

简介：Temperatureevolutionofaworkingpieceduringhotrollinghasasignificantinfluenceonthemicrostructureandfinalmechanicalpropertiesofthematerial.Asthemeasurementtechnologiesimprove,on-linemeasurementofthetemperatureacrossthestripwidthhasbecomeaccessible,andthusmonitoringandcontrolofthetransversaltemperaturedistributionduringhotrollingcanberealized.Thescanningofthetemperatureacrossthestripwidthcanhelpustounderstandthestateofthetemperaturevariationatthestripedgesandasaresulthelpusimprovethetemperaturehomogeneityofthestrip.Inthispaper,reaearchontemperaturedistributionalongthestripwidthisreviewedfirst,andthenthemechanismofthescanningmeasuringdevicesisintroduced.Withthetemperaturescanningmeasurementdatatakenfromthefinishingmillentrypointandthedowncoilerentrypoint,thetemperaturedistributionatthestripedgesisanalyzed.Itispointedoutthattheroughingprocessisthemaincontributortothetemperatureinhomogeneity.Furthermore,thecontributionoftheedgerheatertothetemperaturehomogeneityisinvestigated.

简介：在这份报纸，环境扫描电子显微镜学(ESEM)被用于描绘矿物质和处理残余(COPR)的铬铁矿矿石的元素分发。测试结果证明忍受Crbrownmillerite发生在COPR粒子的边界，当有在它的结构的Cr(VI)的hydroandradite在内介绍COPR粒子时。方镁石和方解石发生在空隙的区域。Ca，Fe和艾尔在整个COPR粒子是分布式的元素分析表演，和Mg主要在空隙的区域或在粒子表面上存在。Cr的一个更低的内容在COPR粒子是均匀地分布式的，当Cr的稍微更高的集中发生在粒子内时。让Cr从COPR移居将花一相对更长的时间，这被建议，特别为hexavalent铬，因此沥滤的时间和粒子尺寸可以是影响Cr(VI)的版本的二个重要因素。

简介：在叶绿素的空间分布上学习水道学的因素的效果一(Chl一)，调查在热带东方印度洋被执行(80栠杩敨瑳瘠污敵?瑡删来潩?我

简介：Amulti-bubbledynamicscodeaccountingforgasdiffusionintheliquidandthroughthebubblewallwasdevelopedandusedtostudythemodificationofabubblenucleipopulationdynamicsbyapropeller.ThepropellerflowfieldwasobtainedusingaReynolds-AveragedNavier-Stokes(RANS)solverandbubblenucleipopulationswerepropagatedinthisfield.Thenumericalpro-cedureenabledestablishmentofthepossibilityofproductionbehindthepropellerofrelativelylargevisiblebubblesstartingfromtypicaloceannucleisizedistributions.Theresultinglargerbubblesareseentoclusterinthebladewakesandtipvortices.Parametricinvestigationsoftheinitialnucleisizedistribution,thedissolvedgasconcentration,andthecavitationnumberwereconductedtoide-ntifytheireffectsonbubbleentrainmentandtheresultantvoidfractionsandbubbledistributionmodificationsdownstreamfromthepropeller.Imposedsyntheticturbulence-likefluctuationsuntotheaverageRANSflowfieldwerealsousedtostudytheeffectavera-gingintheRANSprocedurehasontheresults.

简介：Byanalyzinghigher-accuracylocationdataoftheTangshanearthquakesequence,acleardistributionpatternofthreeaftershockbeltsintheNE,NWW,andNWdirectionsofhasbeenobtained.TheanalysisrevealsthreeruptureplanesofstrongeventsofMS7.8,MS7.1andMS6.9inthesequence.Itindicatesthatthecomplexpatterniscloselyrelatedtotheearthquakesource,andtheNE-,NWW-andNW-trendingregionalfaultzones,whichhavebeenrevealedbytheresearchofthepre-seismicityanomaly.Insummary,thesourceislocatedinthejunctionofthethreefaultzones,andtheruptureplanesofthethreestrongeventslocatedinthesourcecanberegardedasthelockedsegmentsonthethreefaultzones.Onthesegrounds,thepaperexplainsthecomplexityofthesourceandepicentraldistributionofaftershocks.

简介：

简介：Thispaperproposesatechniquetomitigatethevoltageunbalanceissuecausedbythehighpenetrationofphotovoltaic(PV)systemsintothelowvoltagedistributionnetworks(LVDN)usingasinglephaseenergystoragesystem(ESS).TheESScomprisesabi-directionalpowerflowinverterandabatterybank.Thesystemiscapableofabsorbingtheexcesspoweranddeliveringpowertothenetworkinordertokeepthevoltageunbalancefactor(VUF)belowthestatutorylimitof1%.Investigationsarecarriedoutintheexperimentalsmall-scaleenergyzone(SSEZ).TheexperimentalresultsdemonstratethattheESSiscapableofmitigatingtheVUFofthenetwork.

简介：Thispaperproposesahybriddecoupledpowerflowmethodforbalancedpowerdistributionsystemswithdistributedgenerationsources.Themethodformulatesthepowerflowequationsinactivepowerandreactivepowerdecoupledformwithpolarcoordinates.Second-ordertermsareincludedintheactivepowermismatchiteration,andconstantJacobianandHessianmatricesareused.Ahybriddirectandindirectsolutiontechniqueisusedtoachieveefficiencyandrobustnessofthealgorithm.Activepowercorrectionissolvedbymeansofasparselowertriangularanduppertriangular(LU)decompositionalgorithmwithpartialpivoting,andthereactivepowercorrectionissolvedbymeansofrestartedgeneralizedminimalresidualalgorithmwithanincompleteLUpre-conditioner.Typicaldistributiongenerationmodelsanddistributionloadmodelsareincluded.Theimpactofzero-impedancebranchesisexplicitlymodeledthroughreconfiguringoftheadjacentbrancheswithimpedances.Numericalexamplesonasampledistributionsystemwithwidespreadphotovoltaicinstallationsaregiventodemonstratetheeffectivenessoftheproposedmethod.

简介：Anewtestmethodwasintroducedtomeasurefiberdistributioninsteelfiberreinforcedmortarbyusingimageanalysistechnique.Throughspecimenpreparation,imageacquisition,fiberextraction,andmeasurementofrelatedfiberparameters,quantitativeanalysisoffiberdistributioncouldbeobtainedbytwoparameters,namelydispersioncoefficientandorientationfactor.Effectofboundaries,sizeandsteelfibercontentonfiberdistributionwasdiscussed.Resultsshowedthat,steelfiberdistributionwasaffectedbyboundaryeffect,whichwouldbeweakenedwiththeincreaseofspecimensize.Ifthelengthandwidthremainedconstant,thespecimenheighthadasignificanteffectonorientationfactoroffiber,whileitsinfluenceondispersioncoefficientwasnotsoobvious.Withtheincreaseofsteelfibercontent,dispersioncoefficientdecreasedslightly,andorientationfactordeviatedfrom0.5.

简介：潮汐的流动是一个周期的运动不稳定、不一致，它显然有加速和减速过程，特别在沿海的浅水里。潮汐的流动雷纳兹应力的垂直分发从线性分发背离了的许多研究表演。潮汐的流动雷纳兹压力的寓言的分发被歌等建议。(2009)。尽管模型更好充满领域观察和室内的试验性的数据，它有潮汐的流动雷纳兹应力的更低的截断的系列扩大，并且对分发的描述不是很全面的。由介绍潮汐的流动的运动方程并且改善，寓言的分发由歌等建立了。(2009)，潮汐的流动雷纳兹压力的立方的分发被建议。立方的分发被领域数据验证很好(Bowden和Fairbairn，1952；Bowden等，1959；Rippeth等，2002)并且试验性的数据(Anwar和阿特金斯，1980)，与Kuo等的数字模型结果一致。(1996)，并且与潮汐的流动雷纳兹压力的寓言的分发相比。这立方的分布比寓言的分发，而且罐头不仅好，这更好被显示出反映与潮汐的流动减速与潮汐的流动加速并且向上向下从线性分发背离的雷纳兹应力的基本特征，为潮汐的流动的速度侧面上的进一步的学习的基础。

简介：Thetransportprocessof12CionsinwaterwasstudiedwithSRIMcodeandGeant4toolkit.TheSRIMresultsindicatethatthetransversediffusionof12Cionbeamcausesdistortionofenergydepositalongthebeamdirection.Thedistortionbecomesmorenotableasthetrans-versediffusionincreases.ThesimulationresultsofGeant4indicatethattheinfluenceofsecondaryfragmentsonenergydepositdistributionwouldbethemainfactorcausingthedistortioninhigherenergyrange.Intheregionadjacenttothebeamlinewherethecontributionfrom12Cionsdomi-nates,thecontributionsfromsecondaryfragmentsareignorable.Thefurtherfromthebeamaxistheregionlocates,thelargerthecontributionsfromsecondaryfragments,untilthecontributionsfromsecondaryfragmentsareignorable.Thefurtherfromthebeamaxistheregionlocates,thelargerthecontributionsfromsecondaryfragments,untilthecontributionsfromsecondaryfrag-mentsexceedthatof12C.Amongallthesecondaryfragments,thecontributionsofH,HeandBionsaremostlynotable.Itisalsofoundthatsomepositron-emittingsecondaryfragmentscouldbeveryusefulforpositionemittingtomography(PET).

简介：ToaidinmanagementofCunninghamialanceolata,themaintimberspeciesinSouthernChina,itsvariationofspatialdistributionpatternwasanalyzed.ThreepermanentplotsofC.lanceolataplantationswithapproximatelythesamesiteconditions,setbyChinacontinuousforestinventoryinShunchang,Fujian,wereselected.C.lanceolatagrowthwasdividedintotwostages:youngtrees(5cm≤diameteratbreastheight(DBH)<10cm)andmaturetrees(DBH≥10cm).TheDBHandcoordinatesofeverytree(DBH≥5cm)inthepermanentplotswererecordedin2003and2008.ThefunctionL(r),improvementofRipley’sK(r),thepaircorrelationfunctiong(r),andtheuniformangleindex(W_i)wereusedtoanalyzethespatio-temporalvariationofspatialdistributionpatterns.Thethreepermanentplotshadmeanuniformangleindex(W)between0.494-0.578atlowaltitudes,0.465-0.477atmediumaltitudes,and0.426-0.601athighaltitudes.Resultsshowedthataltitudedidnotaffectthespatialdistributionpattern.TheL(r)andg(r)functioncurvesofmaturetreesweregenerallylowerthanyoungtrees’,i.e.tendtobemorerandomoruniformdistribution.Soregardlessoftheinitialdistributionofyoungormaturetrees,withthepassageoftime,therewasatendencyfortheaggregateddistributiontochangetoarandomdistribution,andarandomdistributiontochangetoauniformdistribution.

简介：AsurveywasconductedintheequatorialareaofIndianOceanforabetterunderstandingofthedynamicsofhookdepthdistributionofpelagiclonglinefishery.Wedeterminedtherelationshipbetweenhookdepthandverticalshearofcurrentcoefficiency,windspeed,hookpositioncode,sineofwindangle,sineofangleofattackandweightofmessengerweight.Weidentifiedthehookdepthmodelsbytheanalysisofcovariancewithagenerallinearmodel.TheresultsshowedthatthewindeffectonthehookdepthcanbeignoredfromOctobertoNovemberinthesurveyarea;thesurfacecurrenteffectonthehookdepthcanbeignored;theequatorialundercurrentisthekeyfactorforthehookdepthinIndianOcean;andthereisanegativecorrelationbetweenthehookdepthandverticalshearofcurrentandangleofattack.Itwasalsofoundthatthedeeperthehookwasset,thehigherhookdepthshoalingwas.Theproposedmodelimprovestheaccuracyofthepredictionofhookdepth,whichcanbeusedtoestimatetheverticaldistributionofpelagicfishinwatercolumn.

简介：Inordertoprovideanoperationalreferencefortropicalcycloneprecipitationforecast,thisstudyinvestigatesthespatialdistributionsofprecipitationassociatedwithlandfallingtropicalcyclones(TCs)affectingChinausingGeostationaryMeteorologicalSatellite5(GMS5)-TBBdataset.AllnamedTCsformedoverthewesternNorthPacificthatmadedirectlandfalloverChinaduringtheperiod2001-2009areincludedinthisstudy.BasedontheGMS5-TBBdata,thispaperrevealsthatingeneraltherearefourtypesofdistributionofprecipitationrelatedtolandfallingTCsaffectingChina.(a)theSouth-WestTypeinwhichthereisaprecipitationmaximumtothesouthwesternquadrantofTC;(b)theSymmetricalSouthTypeinwhichtherainfallismorepronouncedtothesouthsideofTCintheinnercorewhilethereisasymmetricalrainfalldistributionintheouterbandregion;(c)theSouthType,inwhichtherainfallmaximaismorepronouncedtothesouthofTC;and(d)theNorthType,inwhichtherainfallmaximaismorepronouncedtothenorthofTC.AnalysesoftherelationshipbetweenprecipitationdistributionsandintensityoflandfallingTCsshowthatforintensifyingTCs,boththemaximumandthecoverageareaoftheprecipitationinTCsincreasewiththeincreaseofTCintensityovernorthernJiangsuprovinceandsouthernTaiwanStrait,whiledecreasingoverBeibuGulfandtheseaareaofChangjiangRiverestuary.ForallTCs,thecenterofthetorrentialraininTCshiftstowardtheTCcenterastheintensityofTCincreases.Thisfindingisconsistentwithmanypreviousstudies.Thepossibleinfluencesofstormmotionandverticalwindshearontheobservedprecipitationasymmetriesarealsoexamined.Resultsshowthattheenvironmentalverticalwindshearisanimportantfactorcontributingtothelargedownshearrainfallasymmetry,especiallywhenaTCmakeslandfallonthesouthandeastChinacoasts.Theseresultsarealsoconsistentwithpreviousobservationalandnumericalstudies.

简介：Inthepresentpaper,weshallrigorouslyre-establishtheresultofthesingle-particlefunctionofaquantumdotsystematfinitetemperature.Unliketheproofgiveninourpreviouswork(Phys.Rev.B74195414(2006)),wetakeadifferentapproach,whichdoesnotexploittheexplicitexpressionoftheGibbsdistributionfunction.Instead,weonlyassumethatthestatisticaldistributionfunctionofthequantumdotsystemisthermodynamicallystable.Asaresult,weareabletoshowclearlythattheelectronicstructureinthequantumdotsystemiscompletelydeterminedbyitsthermodynamicstability.Furthermore,theweakerrequirementsonthestatisticaldistributionfunctionalsomakeitpossibletoapplythesamemethodtothequantumdotsystemsinnon-equilibriumstates.

简介：photonic水晶的热性质有18个循环地分布式的核心的纤维(PCF)激光被使用完整向量的有限元素方法调查(女性)。结果证明18核心PCF与单个核心PCF和19核心PCF相比举办更有效的热分散建设。另外，有不同热负担的18核心PCF激光的温度分发被模仿。当热负担在近似对应于600W的抽的力量的80W/m上面时，结果证明核心温度接近近似拉1800K的价值的纤维，当当热负担在近似对应于110W的抽的力量的15W/m上面时，涂层温度接近大约550K的损坏价值时。因此冷却的纤维是必要的完成力量可伸缩。与另外的不同冷却系统相比，使计划凉下来的铜被发现是一个有效方法减少热效果。

简介：AseminiisaNorthernHemispherecerambycidtribe,andanimportantforestpest,mainlycausingdamagetoconiferousplants.Moreimportant,asonekindofquarantineinsects,Aseminicanbringaboutmanytroublesintimbertrade,therefore,thealienspeciesshouldbepaidmoreattentionsandneedtobequarantinedinordertopreventthemtobeintroducedtoChina.InChina,thereare4genus26speciesofAsemini.HostplantsofAseminiinclude15genus36speciesof7families,andthemainhostplantsareinPinus,accountingfor30.56%ofthetotal.Afaunaanalysisindicatedthat15speciesofAseminidistributedinthePalarearticRealm,accountingfor57.69%ofthetotal.ThespeciespredominatedinChina,probablybecausegymnospermswerethemainvegetabletypeinthisregion.ThispaperlistsalltheknownspeciesandgeneraofAseminiandtheirhostplantsinChina,anddiscussestheirdistribution.Theaimistoarousetheconcernsoftheseinsectsandprovideareferencefortherelevantwork.