简介:Inrecentyears,thestudyofmantleplumeshasbecomea“hotspot”inearthsciences;enormouspapersanddatahavebeenpublished,andmanymantleplume-relatedquestionshavearisen:DidmantleplumesinthePrecambrianbehavethesamewayastheydotoday?Whataretherolesofplumesintheevolutionoftheearth?Whataretheeffectsofmantleplumesonglobalchangesandmetallogenesis?Theseissuesarefrequentlyencounteredandhotlydebatedinawiderangeofearthsciencefieldssuchastectonicsgeochemistry,geophysics,metallogenesis,
简介:ForewordInJune2013,themediaintheUK,theUnitedStatesandChina’sHongKongexposedtheNationalSecurityAgency’sclandestinesurveillanceprogram,codenamedPRISM,usingdocumentsreleasedbytheformerNSAcontractorEdwardSnowden.Theleakedinformationprovokedshockandoutrage.Subsequently,aninvestigationcarriedoutbyvariousChinesegovernmentdepartmentsoverseveralmonthsconfirmedtheexistenceofsnoopingactivitiesdirectedagainstChina.
简介:EDITOR’SNOTE:TheStateCouncilInformationOfficeofthePeople’sRepublicofChinapublishedareporttitled'HumanRightsRecordoftheUnitedStatesin2013'onFebruary28,2014.Followingisthefulltextofthereport:ForewordTheStateDepartmentoftheUnitedStates,whichposedas'theworldjudgeofhumanrights,'madearbitraryattacksandirresponsibleremarksonthehumanrightssituation
简介:TheconstructionoftheGeologicTimeScale(GTS)isatitanicscientificchallengethathasbeenunderwayfortwocenturiesandwillrequiremuchdedicatedeffortinthefuture.ItalypreservesaparamountstratigraphicrecordofMesozoicandCenozoicmarinesedimentsthathavebeensignificantinthedevelopmentofthemodernGTS.TheItalianstratigraphicrecordhasbeenhistori-callyimportantinintroducinganddefiningthestandardChronostratigraphicUnits(CUs)oftheNeogeneandQuaternary.PelagicsuccessionsfromNorthernApen-ninesandSouthernAlpshavebeenusedintheseventiesforintegratingthelateCretaceous-PaleogeneGeomag-neticPolarityTimeScale(GPTS)withplanktonicmicrofossilbiostratieraohvandstandardCUs.Thiswasamajorcontributiontotheconstructionofanewgener-ationofGTSbasedonintegratedmagnetobiochronol-ogy.ThemiddleMiocenetoearlyPleistocenemarinerecordfromSicilyandsouthernItalyhasbeenfunda-mentalforestablishingtherecentlydevelopedAstro-nomicalTimeScale(ATS).Inprospect,therearemanypotentialsstilltobeexploitedintheItalianmarinestratigraphicrecordforimplementingtheGTSbydefin-ingGSSPsofvariousCUs,improvingmagneto-biochronologyandextendingdownwardstheATS.
简介:PowersalesofBeijingPowerSupplyBureaureached31.81TWhin2000,itwasincreasedby3.563TWhoverpreviousyear,oragrowthrateof12.61%.Itwastheyearofhighestgrowthsince1978.Accordingtoanalysis,thehighgrowthrateofelectricityconsumptionisattributablemainlytonaturaldeman