简介：Ｄｉｓｔｒｉｂｕｔｉｏｎａｌｆｅａｔｕｒｅｓｏｆδ１８ＯｉｎｐｒｅｃｉｐｉｔａｔｉｏｎｉｎＣｈｉｎａＺＨＡＮＧＸｉｎｐｉｎｇＤｅｐａｒｔｍｅｎｔｏｆＧｅｏｇｒａｐｈｙ，ＨｕｎａｎＮｏｒｍａｌＵｎｉｖｅｒｓｉｔｙ，Ｃｈａｎｇｓｈａ４１００８１ＣＨＩＮＡ...

简介：The19^thHimalaya-Karakoram-TibetWorkshop(HKT19),asanannualinternationalworkshopdevotedtopresentationsofnewresearchfindingsintheEarthsciencesandrelateddisciplinesfromtheHimalaya-Karakoram-Tibet(HKT)regionanddiscussionontheburningissues,washeldinNiseko,afamousskiresortinHokkaido,Japan.TheHKT19OrganizingCommitteehostedtheworkshoptogetherwithtwo21^stCenturyCenterofExcellencePrograms,namely,COEforthe“Neo-ScienceofNaturalHistory”(HokkaidoUniversity,ProjectLeader:H.Okada),COEfor“DynamicsoftheSun-Earth-LifeInteractiveSystem”,(NagoyaUniversity,ProjectLeader:T.Yasunari),andtheDivisionofEarthandPlanetarySciences,HokkaidoUniversity,

简介：ThreesamplingcrosssectionsalongthesouthpathstartingfromtheTropicsthroughthevaporpassageintheYunnan-GuizhouPlateautothemiddle-lowreachesoftheYangtzeRiver,thenorthpathfromWestChina,viaNorthChina,toJapanunderthewesterlies,andtheplateaupathfromSouthAsiaovertheHimalayastothenorthernTibetanPlateau,aresetup,basedontheIAEA(InternationalAtomicEnergyAgency)/WMOglobalsurveynetworkandsamplingsitesontheTibetanPlateau.Thevariations,andtherelationshipwithprecipitationandtemperature,oftheδ18Oinprecipitationalongthethreecrosssectionsareanalyzedandcompared.Alongthesouthpath,theseasonaldifferencesofmeanδ18OinprecipitationaresmallatthestationslocatedintheTropics,butincreasemarkedlyfromBangkoktowardsthenorth,withtheδ18Ointherainyseasonsmallerthaninthedryseason.Theδ18Ovaluesinprecipitationfluctuateonthewhole,whichshowsthattherearedifferentvaporsources.Alongthenorthpath,theseasonaldifferencesofthemeanδ18OinprecipitationforthestationsinthewestofZhengzhouareallgreaterthanintheeastofZhengzhou.Duringthecoldhalfoftheyear,themeanδ18OinprecipitationreachesitsminimumatUrumqiwiththelowesttemperatureduetothewide,coldhighpressureoverMongolia,thenincreasesgraduallywithlongitude,andremainsatroughlythesamelevelatthestationseastwardfromZhengzhou.Duringthewarmhalfoftheyear,theδ18Ovaluesinprecipitationarelowerintheeastthaninthewest,markedlyinfluencedbythesummermonsoonoverEastAsia.Alongtheplateaupath,themeanδ18OvaluesinprecipitationintherainyseasonarecorrespondinglyhighinthesouthernpartsoftheIndiansubcontinent,andthendecreasegraduallywithlatitude.Asharpdepletionofthestableisotopiccompositionsinprecipitationtakesplaceduetotheverystrongrainoutofthestableisotopiccompositionsinvaporintheprocessofliftingoverthesouthernslopeo

简介：TheInternationalGeologicalCongresses(IGCs)hadbeeninterruptedfornineyearsduringWorldWarI,betweenToronto(1913)andBrussels(1922).WorldWarIIcausedanevenlongerbreakofelevenyears,betweenMoscow(1937)andLondon(1948).

简介：

简介：~~

简介：Aseriesof96-htyphoontrackpredictionexperimentswerecarriedoutusingmediumrangeforecastingsystemofNMCbyaddingBOGUStyphoon(simplifiedasB-TC)intothefirstguessfieldortheanalysisfieldinordertoprovidelongertimetyphoontrackforecast.TheresultsshowthatT106L19couldprovideabetterforecasttotyphoontrackswhentheB-TCwasadded,especiallywhenthetyphoonvortexisevenweaker.ThesensitiveexperimentsonwheretoaddtheB-TCshowthattheresultsfromaddingtheB-TCintothefirstguessfieldarebetter.TheresultsalsoshowthattheinitializationsmoothestheB-TCalotandthiswillaffectthetyphoontrackprediction.

简介：1概况第19届国际生物气象学会议于2011年12月4－8日在新西兰奥克兰举行。

简介：由国土资源部和发改委联合划定的19个煤炭国家规划区为：东胜矿区、神府新民矿区、准格尔矿区、榆神矿区、榆横矿区、渭北矿区、彬长矿区、大同矿区、平朔朔南矿区、河保偏矿区、柳林矿区、离石矿区、乡宁矿区、西山古交矿区、沁源矿区、霍州矿区、晋城矿区、潞安矿区、阳泉矿区。

简介：

简介：

简介：

简介：蛇绿岩普遍被发现在碰撞型和增生型两种造山带缝合线上，因此经常被用来确定板块边界。自从欧洲地质学家在19世纪早期提出蛇绿岩的概念以来，蛇绿岩的研究经历了几个发展阶段。早期研究认为蛇绿岩是侵入地槽的一套侵入岩；板块构造理论兴起后，蛇绿岩被认为是产生于大洋中脊的洋壳；在1972年的Penrose会议上，科学家们将蛇绿岩定义为一套从基性岩到超基性岩的，可以区分的复式岩体。此后，蛇绿岩的起源（构造背景），侵位机制，特征等研究都取得了很多进展。进入21世纪，出现了一些较好的蛇绿岩形成模式和划分方法。

简介：摘 要：道岔是轨道结构中薄弱环节，尖轨是道岔的重要组成部分，尖轨位移不足对列车的安全性、稳定性、舒适度产生严重的影响。道岔检查依靠拨动钢轨使尖基轨密贴来获取真实数据，依靠列车高速挤压使尖基轨密贴来恢复几何线型。通过对尖轨位移不足产生的原因分析，现场试验和病害整治，探索解决尖轨位移不足病害整治的有效方法，为高速铁路日常的养护提供参考。

简介：~~

简介：ItwasagreathonourandprivilegetobeelectedPresidentofWASERduringthefirstCouncilmeeting,heldinBeijinglastSaturday.IhopethatIwillbeabletofulfiltheexpectationsofthosethatelectedmeandIlookforwardtoservingtheAssociationandpromotingitsdevelopment.Asahydrologist/geomorphologistwhostartedworkinginthefieldoferosionandsedimentationsome35yearsago,

简介：从天气形势、卫星云图、物理量等方面对2001年4月19～20日大暴雨过程进行了分析,总结出这次暴雨的地面和850hPa一些特性.

简介：

简介：【摘 要】 本文指出J18型（D-sub系列）小型矩形电连接器参照IEC60807及美军标MIL-C-24308等许多军用和工业用标准要求进行研制生产；连接器应用广泛，主要用于通讯设备、电子计算机及工业电子仪器等；产品有焊接式、压接式、压配式、直插印制板、弯插印制板等型式之基础知识介绍。

简介：全球排放组织（GEIA：GlobalEmissionsInitiative）第18次会议于2017年9月13-15日在德国汉堡召开。本次会议主题是“为健康环境的排放科学：人类与自然对气候和空气质量的影响及其相互作用（EmissionsScienceforaHealthyEnvironment：TheInterplayofHumanVersusNatu-ralInfluencesonClimateandAirQualityEmissions），主要目标是发展更好的定量评估地面温室气体和化学成分地面排放的方法。