简介:HistoricaldataregardingZhangHeng'sseismoscopeisnotsingularproof.Actually,thefourearliesthistoricaldocuments,i.e.,ContinuationofHistoriographyofHanDynasty,HistoriographyoftheLaterHan,BookoftheLaterHanandDingRecordallhaverelevantrecordsofitsstructure,size,principle,responsetoearthquakeandactualapplications.Thesefiveaspectsaresupportedbyarchaeologicalresearch,unearthedculturalrelics,historicalearthquakesandmodernseismologicalstudy.Thesehistoricalmaterialscontainagreatdealofspecificinformationaboutthisancientseismoscope.Inconclusion,theauthenticityandreliabilityofZhangHeng'sseismoscopeareverified.
简介:Naturalgascontaininghydrogensulphide(H2S)hasbeenfoundinseveralpetroliferousbasinsinChina,suchastheSichuanBasin,BohaiBayBasin,OrdosBasin,TarimBasin,etc.NaturalgaswithhigherH2Scontents(H2S>5%mol.)ismostlydistributedinboththegasreservoirsofDukouhe,Luojiazhai,PuguangandTieshanpo,whichbelongtotheTriassicFeixianguanFormationinthenortheasternSichuanBasinandthoseoftheKongdian-ShahejieformationsinthenortheasternJinxianSagoftheJizhongDepression,BohaiBayBasin.IntheSichuanBasin,theH2Scontentsofnaturalgasaverageover9%andsomecanbe17%,whilethoseoftheBohaiBayBasinrangefrom40%to92%,beingthenoneofthegasreservoirswiththehighestH2Scontentsintheworld.Basedondetailedobservationandsampleanalysisresultsofatotal5000mofcorefromover70wellsintheabove-mentionedtwobasins,especiallysulfurisotopicanalysisofgypsum,brimstone,pyriteandnaturalgas,alsowithintegratedstudyofthegeochemicalcharacteristicsofhydrocarbons,itisthoughtthatthenaturalgaswithhighH2Scontentsresultedfromthermochemicalsulfatereduction(TSR)reactions.Amongthem,thenaturalgasintheFeixianguanFormationresultedfromTSRreactionsparticipatedbyhydrocarbongas,whilethatintheZhaolanzhuangoftheJinxianSagbeingtheproductofTSRparticipatedbycrudeoil.DuringtheconsumptionprocessofhydrocarbonsduetoTSR,theheavyhydrocarbonswereapttoreactwithsulfate,whichaccordinglyresultedinthedrycoefficientofnaturalgasincreasingandthecarbonisotopesbecomingheavier.
简介:Inthispaper,ahorizontal2-Dnumericalmodelhasbeendevelopedtosimulateflowprocessesindikeburst.Thefinitedifferencemethodisusedincomputation.Themodelemploys2-Dflowequationsandcansimulatecomplexflowswhensupercriticalflowandsub-criticalflowexistsimultaneouslysuchashydraulicjumps.Severalsimulatedresultsareworkedouttodemonstratetheapplicabilityofthenumericalmodel,suchasfloodpropagationonadrybedofacomplexterrain.
简介:介绍了用于上海天文台佘山25m射电望远镜VLBI观测站S2-PT终端的S2FS(S2FieldSystem)控制软件。该软件在甚长基线干涉测量(VLBI)实验中,能实现S2终端系统记录观测数据自动化。
简介:从区域板块构造运动、盆山耦合及与层间氧化带型铀成矿关系出发,将吐哈盆地南缘构造演化归纳为四个阶段:(1)新疆古陆台发展阶段(An∈);(2)准吐板块南缘被动大陆边缘沉积阶段(∈~C1);(3)岛弧前缘增生推覆体及类前陆盆地发育阶段(C2~T);(4)次造山区-斜坡带发育阶段(J~Q)。第三阶段形成的构造格局为本区中新生代沉积及层间氧化带型铀成矿奠定了良好的物质来源和长期稳定的斜坡带基础,第四阶段中侏罗世末以后的山间盆地发育期控制了本区层间氧化带的发育及砂岩型铀矿的形成。提出“中新生代次造山区背景上的稳定斜坡带-河流相富还原剂可渗透碎屑岩系平缓单斜层-局部背斜、鼻隆及断层复活”的构造叠加组合为本区层间氧化带型铀矿的构造位标志。