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简介：ChineseScienceBulletinreportsontheinnovativeachievementsinallsubjectareasinscience.Itisaplaceforthehigh-levelexchangebetweenscientistsfrombothChinaandabroad.ChineseScienceBulletinisindexedbySCI,CA,etc.ChineseScienceBulletinprintversionisdistributedglobally.Itselectronicversionisavailableatwww.springerlink.comTheeditor-in-chiefandtheexecutiveeditorsformthecoreofleadershipofChineseScienceBulletin.Thereviewprocess,withfairnessasoneofitspriorities,isorganizedbytheeditor-in-chiefandtheexecutiveeditorswiththeassistanceoftheassociateeditors.ChineseScienceBulletinfeaturesarticles,reviewsandnewsandviews.ChineseScienceBulletinisasemimonthly,24issuesayear,publishingmorethan500articles.

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简介：在这份报纸，在年度流量和沉积运输的变化被从10使用长期的观察数据向南向北从远方越过中国在10条大河里计量车站到远方估计了。年度沉积收益通常在过去的一半有一个减少的趋势，这被发现世纪。每区域根据在年度流量和沉积的变化让步，中国的河能被分类进下列三个组：1)有减少的年度沉积运输和稳定的流量的河；2)有减少的年度沉积运输和流量的河并且3)有极大地减少的年度沉积运输和减少的年度流量的河。结果显示那，在所有南部的河里(到包括Huaihe河的Huaihe河的南方)，在平均年度流量有小变化但是在年度沉积运输的戏剧的减少。然而，在北河里，年度沉积收益和流量显示出减小的重要证据。为了进一步在年度流量和沉积调查最近的变化，搬运，来自这10个计量车站在的短期的观察数据最近10年被估计了。结果证明年度沉积运输和流量在过去的10年里在北河里显著地减少了。在Lijin车站把黄河用作一个例子，为最后10年的平均年度流量仅仅是长期的平均价值的1/3和最后10年的平均年度沉积收益仅仅是长期的平均价值的1/4。更不平常地，在Yongding河里，年度沉积收益接近了零，流量显著地减少了。另外，在流量和沉积运输的变化上的人的活动的影响被讨论了。

简介：AfterthereleaseofthepreviousreporttotheCommitteeonSpaceResearch(COSPAR)onprogressachievedbyChinesescientistsinionosphericresearches(LiuLBandWanWX,2016),intherecenttwoyears(2016–2017)manyinterestingnewinvestigationsintovariousionosphericrelatedissueshavebeencompleted.Inthisreport,about100publicationsaresummarized.Thetopicshighlightedareasfollows:Ionosphericspaceweather,ionosphericdynamics,ionosphericclimatologyandmodelling,ionosphericirregularityandscintillation,GlobalNavigationSatelliteSystem(GNSS)relatedionosphericissuesandothertechniques,andradiowavepropagationintheionosphere.AnoutstandingfeatureisthatmoreandmoreobservationsfromtheMeridionalProjectsupportedtheionosphericinvestigations.

简介：ＧｅｏｇｒａｐｈｉｃａｌｄｉｓｔｒｉｂｕｔｉｏｎｏｆｈｙｐｏｃｅｎｔｒａｌｄｅｐｔｈｓｏｆＣｈｉｎｅｓｅｅａｒｔｈｑｕａｋｅｓＸＩＮＧ－ＢＥＩＤＵＡＮ（段星北）ＩｎｓｔｉｔｕｔｅｏｆＧｅｏｐｈｙｓｉｃａｌ，ＳｔａｔｅＳｅｉｓｍｏｌｏｇｉｃａｌＢｕｒ...

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简介：潮计量器的高度变化直接影响海平面观察。为在大区域或地球的海平面变化的研究，陆地竖直位移必须被考虑。在2001和2003的GPS和绝对重力观察的二个会议被用来在ITRF2000和欧亚大陆框架决定中国海岸的水平、垂直的运动。在连续观察和周期的观察的结果之间的Thedifference被讨论。

简介：Urbangeo-environmentmainlyconcernsthoseregardsinandaroundacity,suchasthemovementofearthcrustandearthsurface,conditionsofhydrology,geology,geographyandmeteorology.Therelevantstudiesongeo-disasterreductionandtheinfluencesresultedfromhumanactivitiesonthegeo-environmentareincludedaswell.Itisstressedinthepaperthatgeo-environmentalprotectionandmanagementareofsignificancetothesustainabledevelopmentforChinesecities.

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简介：摘要：煤是中国的主导的精力资源。煤地质的探索是煤工业的持续开发的基础。自从1990年代末，在中国煤地质学和探索技术的进展在下列方面被显示出。(1)煤地质学的基本研究从传统的地质的研究改变了到地球系统科学；(2)突破为煤资源在综合探索技术被完成了；(3)煤和coalbed甲烷资源的评估为为中国的煤工业和大煤底的建设做的macropolicy提供重要基础；(4)重要进展在在煤使用信息技术被做了地质的探索和3S(GPS，GIS，RS)技术。目前并且时间的一个时期以后，中国煤的主要任务地质的技术如下：(1)在东方中国和深采矿的地质的问题解决资源代替问题；(2)在华中，和资源问题的精力底解决复杂区域的综合的煤探索的问题由煤利用导致了；(3)作努力在西方的中国提高地质的研究的水平和煤累积盆的资源评估；(4)加强干净的煤技术的地质的研究；(5)在现代的煤采矿和安全生产加强这些问题的地质的研究；(6)在煤资源和主要地质的调查支持信息技术。

简介：WesimulateGPShorizontalvelocityfieldintermsofrotationsofcrustalblockstodescribedeformationbehavioroftheChinesemainlandanditsneighboringareas.31crustalblocksareboundedprimarilyby~30Quaternaryfaultswithdistinctgeometriesandvariablelong-termratesof<20mm/a,and1683GPSvelocitiesweredeterminedfromdecade-longobservationsmostlywithanaverageduncertaintyof1?2mm/a.WedefineGPSvelocityatasitebythecombinationofmotionofrigidblockandelasticstraininducedbythefaultthatislockingduringaseismiccycle.ModelvelocitiespredictedfromthepreferableblockmodelmatchwellwiththeGPSvelocitiestoanuncertaintyof~1.7mm/a.Theslipratesinferredfromthismodelisinarangeof6?18mm/aforthemajorfaultsinTibetanditsmarginsand1?4mm/aineasternChina,consistentwithgeologicalobservations.Ournumericalsimulationsuggeststhatthecrustalblocksdeforminternallyatalevelof~10×10-9/a,quitesmallincomparisonwithsignificantdeformationlocalizedalongfaultzonesof50?100kmwide.Weconcludethatthepatternofcontinentaldeformationisnotcontinuous-likebutblock-like,andthetenetofplatetectonicsmaybeapplicabletocharacterizetheactivedeformationinAsia.

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简介：Basedonthestrongearthquakecatalogue,thispaperdiscussesthecharacteristicsofthetimeseriesofstrongearthquakeactivitiesintheworld,westernChinesemainlandanditsperipheral"bigtriangleseismicregion",aswellastheChinesemainland.AccordingtotheanalysisoftheperiodicfeaturesofglobalseismicityofM≥8.0strongevents,itisfoundthatthereissignificantdifferenceinglobalseismicitybeforeandafterthe1960s.StatisticalanalysiswiththeFishermethodhasrevealedthatthe"bigtriangularseismicregion"hasexperiencedaprocessofM8.0earthquakeactivitywithadurationofoverahundredyearssince1800.Furtheranalysisshowsthattheglobalseismicityandthe"bigtriangularseismicregion"possiblyhasaperiodofahundred-yearscale,andhasquasisynchronicitytoacertainextent.TheshallowearthquakeactivityofMS≥7.0intheChinesemainlandisobviouslycontrolledbytheseismicityinthebigtriangularseismicregionandbyglobalseismicityinalargerspatial-scale.Intermsofthetimeseriesoftheseearthquakes,theseismicityshowsadecadalandcentury-scaleactivitypatterns.

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简介：Addingdampersisacommonlyadoptedseismicriskmitigationstrategyformodernbuildings,andthecorrespondingdesignprocedureofdampershasbeenwellestablishedbytheChineseBuildingCode.Eventhoughalltypesofdampersaredesignedbythesameprocedure,actualseismicperformanceofthebuildingmaydifferfromonetotheothers.Inthisstudy,anine-storybenchmarksteelbuildingisestablished,andthreedifferentandtypicaltypesofdampersaredesignedaccordingtotheChineseBuildingCodetorealizestructuralvibrationcontrolunderstrongearthquakeexcitation.Theseismicresponseoftheprototypebuildingequippedwithaviscoelasticdamper,viscousdamperandbuckling-restrainedbrace(BRB)subjectedto10earthquakerecordsarecalculated,andIncrementalDynamicAnalysis(IDA)isperformedtodescribeprogressivedamageofthestructureunderincreasingearthquakeintensity.Intheperspectiveoffragility,itshowsthattheviscoelasticdamperhasthehighestcollapsemarginratio(CMR),andtheviscousdamperprovidesthebestdriftcontrol.BoththeBRBandviscoelasticdamperscaneffectivelyreducetheflooraccelerationresponsesinthemid-risebuilding.