简介:OnOctober18,2018,theChinaGeologicalSurveylaunchedaprojectoftheNationalKeyResearchandDevelopmentProgramofChina,entitled"PredictionandDeepExplorationDemonstrationofGoldPolymetallicDepositsintheJiaodongandLiaodongAreaswithintheNorthChinaCraton".Forthisproject,WulongandBaiyun-XiaotongjiapuyiinJiaodong,aswellasthenorthernZhaopingbeltsofLiaodong,werechosenasoreprospectingdemonstrationareas(Fig.1).
简介:OnthebasisofthepreviousstudiesofthelayeredcrustalmodelintheYutianarea,combinedwiththefieldGPScontinuousobservationdata,weroughlyestimatetheviscouscoefficientofeachlayer.Withtheviscoelastichorizontallayermodel,wecalculatetheviscoelasticco-seismicCoulombstresschangecausedbytheYutianM_S7.3earthquakes2008and2014respectively.BasedontheCoulombstresschange,usingthecalculationmethodof"direct"aftershockfrequency,wecomeupwiththetheoreticalearthquakefrequencydirectlyrelatedtothemainshockandtheco-seismicCoulombstresschangeinthestudyarea.Thenweputforwardamethod,basedonthecomparisonoftheoreticalandactualearthquakefrequencyorthecomparisonbetweentheoreticalandpracticalearthquakefrequency-distancedecaycurvefittingresiduals,toestimatethemagnitudeofamaximumsequentearthquake,directlyrelatedtothemainshockco-seismicCoulombstresschange.Resultscalculatedbydifferentmethodsshowthatthemaximumfollow-upearthquakemagnitudecausedbythecoseismicCoulombstresschangeliesfromM_S7.2toM_S7.5followingYutianM_S7.3earthquakein2008;butthatofthe2014YutianM_S7.3earthquakeisM_S6.3.TheformerisveryclosetotheYutianM_S7.3earthquakein2014.Becauseofthesamemagnitude,relativelyclosespatialdistance,shorttimeinterval,thesameregionoftheexternalforce,thestrongcorrelationbetweentwoseismictectonicandaclearstressinteraction,wethusconsiderthatthetwoYutianM_S7.3earthquakesin2008and2014constituteapairofgeneralizeddoubleshocktypeearthquake.Thisisconsistentwiththesequencetypecharacteristicofpast"doubleshock"earthquakesintheregion.Inthispaper,theinfluenceofthemagnitudelowerlimitandtheb-valueintherelationshipofG-Rontheresultsisdiscussed.Asaresult,whentheviscoelasticcoseismicCoulombstressvariationisdetermined,thelowerlimitofmagnitudehaslittleeffectonthemaximumsequentearthquakemagnitude
简介:[摘要 ] 本文简要介绍了烧结机烟气循环系统的工作原理及在邯钢东区 2#435M2烧结机生产过程的应用;详细阐述了 SIEMENS PLC自动控制系统的硬件架构、应用程序的开发、控制功能的应用及效果等。
简介:本文收集了青藏高原区7级以上以走滑为主的30个地震的地表破裂参数资料,拟合出了青藏高原区新的震级与破裂带长度统计关系式,并结合前人的统计关系式,分别通过破裂带长度估算震级,求出了估算震级与仪器震级的差值。同时将差值为正值(即估算震级偏大)的归为一类,差值为负值(估算震级偏小)的归为另一类,做了分析和对比。研究发现,差值为正值的地震所处的走滑断裂带一般位于一级块体或次级块体的边界断裂带上;差值为负值的地震所处的走滑断裂带大多位于一级块体或次级块体内部断裂带或断裂带的交汇处。基于上述分类的差异,作者对不同回归关系计算的差值数据进行了统计分析,分别给出了修正计算结果不确定性的参考值,为降低估算震级的不确定性提供了理论依据。
简介:Thethirdalgorithmintercomparisonproject(AIP-3)involvedrainestimatesfrommorethan50satelliterainfallalgorithmsandgroundradarmeasurementswithintheIntensiveFluxArray(IFA)overtheequatorialwesternPacificwarmpoolregionduringtheTropicalOceanGlobalAtmospherecoupledOcean-AtmosphereResponseExperiment(TOGACOARE).Earlyresultsindicatedthattherewasasystematicbiasbetweenrainratesfromsatellitepassivemicrowaveandgroundradarmeasurements.Themeanrainratefromradarmeasurementsisabout50%underestimatedcomparedtothatfrompassivemicrowave-basedretrievalalgorithms.ThispaperisdesignedtoanalyzerainpatternsfromtheFloridaStateUniversityrainretrievalalgorithmandradarmeasurementstounderstandphysicallytheraindiscrepancies.Resultsshowthatthereisaclearrange-dependentbiasassociatedwiththeradarmeasurements.However,thisrange-dependentsystematicalbiasisalmosteliminatedwiththecorrectedradarrainrates.Resultssuggestthattheeffectsfromradarattenuationcorrection,calibrationandbeamfillingarethemajorsourcesofraindiscrepancies.ThisstudydemonstratesthatrainretrievalsbasedonsatellitemeasurementsfrompassivemicrowaveradiometerssuchastheSpecialSensorofMicrowaveImager(SSM/I)arereliable,whilerainestimatesfromgroundradarmeasurementsarecorrectable.
简介:利用2013—2015年廊坊市环境监测数据及同期气象资料,采用相关分析等统计方法,分析廊坊市臭氧浓度的日变化特征、超标规律以及气象因素对其的影响。结果表明:臭氧浓度的日变化特征明显,为"1谷1峰"型,每日07:00—08:00左右达到谷值,15:00—16:00达到峰值;臭氧超标只集中出现在春季、夏季与秋季的部分月份,1—3月、11—12月不存在臭氧超标情况,超标现象日变化特征明显,主要出现在11:00—20:00。气象因素对臭氧浓度的影响很大,风向为西南风与东南风时臭氧超标率较高;臭氧超标时,地面天气类型主要为高压后部或高压底部,高空天气类型主要为脊前西北气流或平直西风环流;臭氧浓度与相对湿度呈显著负相关,与温度、日照呈显著正相关。
简介:TheJuly3,2015PishanM_S6.5earthquakeoccurredintheintersectionareaoftheTarimblockandWestKunlunblockwherethemoderate-strongearthquakeshavebecomeactiveinrecentyears.Thispaperhasstudiedtheseismicityparametersoftheearthquakesequencessuchastheb-valueinthePishanregionanditsvicinity.Inaddition,wealsorelocatedtheaftershocksofthePishanM_S6.5earthquakeusingtheseismicphasereportbythedouble-differencemethod.ThetemporalandspatialvariationcharacteristicsofthePishanearthquakesequenceintherupturezoneareanalyzed.Thestudyisofgreatsignificanceintheseismichazardassessmentinthisregion.
简介:landfalling台风的吸收实验的二个集合—在西方的诺思太平洋上的台风丹(1999)被设计比较是3-Dimensional的二种变化数据吸收计划的表演印射的观察(3DVM)和4-dimensional的变化数据吸收变化数据吸收(4DVar)。结果显示出那:(1)3DVM和4DVar成功地改进了合并卫星AMSU的台风紧张和轨道的模拟--一个检索温度和风数据进起始的条件,并且3DVM更显著地,由于背景错误协变性的流动依赖者,矩阵和观察错误协变性矩阵喜欢3-dimensional变化数据吸收(3DVar)圆;(2)在在3DVM的每观察时间的额外的模型集成重复的包括与预言模型一起使它更一致;(3)3DVM由于在它的伴随技术的排除是更节省时间的。