简介：象lumped参数模型那样的分离模型和有限元素模型广泛地在地震的土壤扩大的解决方案被使用。然而，任何一个模型都精确地不估计土壤沉积物的自然频率，也不模仿一抑制频率独立。这研究基于模式等价方法为分层的土壤沉积物的一个维的粘弹性的反应分析开发一个新分离模型。新分离模型是一系列集中的群众，弹簧和缓冲筒与一种特殊配置描绘的一个一个维的相等的multi-degree-of-freedom(MDOF)系统。相等的MDOF系统的动态反应是导出的经分解，物理参数以形式的性质被提出。相等的MDOF系统与可得到的理论解决方案通过扩大函数的比较被验证。在相等的MDOF系统的自由(DOF)的度的适当数字被估计。有存在的相等的MDOF系统的比较研究分离模型被执行。建议相等的MDOF系统罐头确切介绍土壤存款抑制的自然频率和hysteretic并且向更精确的结果提供更少DOF，这被显示出。

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简介：Basedonobservationsofurbanmassconcentrationoffineparticulatemattersmallerthan2.5μmindiameter(PM_(2.5)),groundmeteorologicaldata,verticalmeasurementsofwinds,temperature,andrelativehumidity(RH),andECMWFreanalysisdata,themajorchangesintheverticalstructuresofmeteorologicalfactorsintheboundarylayer(BL)duringtheheavyaerosolpollutionepisodes(HPEs)thatoccurredinwinter2016intheurbanBeijingareawereanalyzed.TheHPEsaredividedintotwostages:thetransportofpollutantsunderprevailingsoutherlywinds,knownasthetransportstage(TS),andthePM_(2.5)explosivegrowthandpollutionaccumulationperiodcharacterizedbyatemperatureinversionwithlowwindsandhighRHinthelowerBL,knownasthecumulativestage(CS).DuringtheTS,asurfacehighliessouthofBeijing,andpollutantsaretransportednorthwards.DuringtheCS,astableBLformsandischaracterizedbyweakwinds,temperatureinversion,andmoistureaccumulation.Stableatmosphericstratificationfeaturedwithlight/calmwindsandaccumulatedmoisture(RH>80%)below250matthebeginningoftheCSiscloselyassociatedwiththeinversion,whichisstrengthenedbytheconsiderabledecreaseinnear-surfaceairtemperatureduetotheinteractionbetweenaerosolsandradiationaftertheaerosolpollutionoccurs.AsignificantincreaseinthePLAM(ParameterLinkingAerosolPollutionandMeteorologicalElements)indexisfound,whichislinearlyrelatedtoPMmasschange.Duringthefirst10hoftheCS,themorestableBLcontributesapproximately84%oftheexplosivegrowthofPM_(2.5)mass.Additionalaccumulatednear-surfacemoisturecausedbythegroundtemperaturedecrease,weakturbulentdiffusion,lowBLheight,andinhibitedverticalmixingofwatervaporisconducivetothesecondaryaerosolformationthroughchemicalreactions,includingliquidphaseandheterogeneousreactions,whichfurtherincreasesthePM_(2.5)concentrationlevels.Thecontributionofthesereactionmechanisms

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简介：Shales,themostabundantofsedimentaryrocks,arevaluedasthesource-rocksandsealstoporouspetroleumreservoirs.Overthepast-twentyyears,organic-richshaleshavealsoemergedasvaluablepetroleumsystems(reservoir,seal,andsourcerockscontainedinthesameformation).Assuchtheyhavebecomeprimarytargetsforpetroleumexplorationandexploitation.ThisPart1ofathree-partreviewaddressesthebulkproperties,multi-scalegeometryandgasadsorptioncharacteristicsofthesediverseandcomplexrocks.Shalesdisplayextremelylowpermeability,andtheirporosityisalsolow,butmulti-scale.Characterizingthegeometryandinterconnectivityofthepore-structureframeworkswiththenatural-fracturenetworkswithinshalesisessentialforestablishingtheirpetroleumexploitationpotential.Organic-richshalestypicallycontaintwodistincttypesofporosity:matrixporosityandfractureporosity.Inadditiontointer-granularporosity,thematrixporosityincludestwotypesofmineral-hostedporosity:inorganic-mineral-hostedporosity(IP);and,organic-matter-hosted(withinthekerogen)porosity(OP).Whereas,thefractureporosityandpermeabilityiscrucialforpetroleumproductionfromshales,itiswithintheOPwhere,typically,muchofthein-situoilandgasresourcesresides,andfromwhereitneedstobemobilized.OPincreasessignificantlyasshalesbecomemorethermallymature(i.e.,withinthegasgenerationzones),andplaysakeyroleintheultimaterecoveryfromshale-gassystems.Shales'methanesorptioncapacities(MSC)tendstobepositivelycorrelatedwiththeirtotalorganiccarboncontent(TOC),thermalmaturation,andmicroporevolume.Claymineralsalsosignificantlyinfluencekeyphysicalpropertiesofshalerelatedtofluidflow(permeability)andresponsetostress(fracability)thatdeterminetheirprospectivityforpetroleumexploitation.Claymineralscanalsoadsorbgas,somemuchbetterthanothers.Thesurfaceareaoftheporestructureofshalescanbepositively

简介：SichuanBasinisatypicalsuperimposedbasin,whichexperiencedmulti-phasetectonicmovements,meanwhileSinian–Cambrianunderwentcomplexhydrocarbonaccumulationprocesses,causingexplorationdifficultiesinthepast60years.Basedonthemicroscopicevidenceoffluidinclusions,combinedwithbasin-modelling,thispaperdeterminesstagesandtimeofhydrocarbonaccumulation,reconstructsevolutionofformationpressureanddynamicprocessesofhydrocarbonaccumulationinSinianDengyingFormation-CambrianLongwangmiaoFormationofGaoshiti-Moxistructure.Threestagesofinclusionsaredetected,includingastageofyellow-yellowgreenfluorescentoilinclusions,astageofbluefluorescentoil-gasinclusionsandastageofnon-fluorescentgasinclusions,reflectingthestudyareahasexperiencedaseriesofcomplexhydrocarbonaccumulationprocesses,suchasformationofpaleo-oilreservoirs,crackingofcrudeoil,formationofpaleo-gasreservoirsandadjustmenttopresentgasreservoirs,whichoccurredduring219–188,192–146and168–0Marespectively.Duringtheperiodofcrudeoilcracking,DengyingFormation-LongwangmiaoFormationshowedweakoverpressuretooverpressurecharacteristics,thenafteradjustmentofpaleo-gasreservoirstopresentgasreservoirs,thepressureinDengyingFormationchangedintooverpressurebutfinallyreducedtonormalpressuresystem.However,duetoexcellentpreservationconditions,theoverpressurestrengthinLongwangmiaoFormationonlyslightlydecreasedandwasstillkepttothisday.

简介：当时，本地联合不稳定性将发生吸收边界状况和地波浪方程的数字计划允许精力自发地进入计算领域。也就是说，二个计划支持普通波浪解决方案，组速度指了进计算域。消除联合不稳定性的本地人的钥匙是避免如此的波浪答案。为块团在2D波导的P-SV波浪运动的有限元素模拟，为高顺序的稳定的实现的一条途径多播送的公式被提供。与一个一致矩形的网孔，它被证明并且验证那高周波的本地联合不稳定性能被设置等于或比\大的元素尺寸的比率消除(\sqrt2\)乘到S波浪速度的P波浪速度的比率。这些结果能为发另外的吸收边界条件导致的不稳定性问题是珍贵的。

简介：第一，在在Qarhan盐湖的intercrystal盐水和它的媒介盐层(盐存款)之间的一系列化学反应的宏观的化学平衡状态被使用Pitzer理论学习。有溶解比率的积累的矿石的宏观的溶解度产品和它的关系的概念被介绍，它在在Qarhan盐湖溶解并且开车钾盐的利用的数字模型被使用。并且第二，在多部件为反应溶质与形成运输的想法的一个模型一起当模特儿在多孔的媒介的新鲜地下水系统是一本参考书，一个二维的运输模型在多部件盐水结合了一系列化学反应多孔的系统(盐存款)被使用Pitzer理论开发。同时，模型被使用在Qarhan盐湖为钾/镁运输建模以便在溶解并且开车的过程并且到为在盐的采矿溶解并且捕获最大的钾/镁的最佳的注射/抽象策略在Qarhan盐湖扔的设计学习固体和液体阶段的转移法律。