简介：像注意到的那样，在实际孔隙介质中大部分液体占据了其自己的孔隙，毛细管压力控制着rc，并且Uw、rc、μs和△P之间的相互关系更复杂。该图说明了应用于更复杂的实际情况的原理：提高Uw将降低毛细管压力，这会降低气体粘度和减小△P。

简介：

简介：

简介：1概况2014年10月28日至11月1日，以中国气象局国家气候中心副主任张强为团长，张存杰、柯宗建、杨明珠和王朋岭为成员的代表团参加了在日本东京举行的第2届东亚冬季气候展望论坛。

简介：Aseriesofidealizedmodelsimulationsareanalyzedtodeterminethesensitivityofmodelresultstodifferentconfigurationsofthelateralboundaryconditions(LBCs)insimulatingmesoscaleshallowconvectionoverhillyterrain.Inthesimulationswithsteadythermalforcingatthemodelsurface,aradiationconditionatbothboundariesisthebestchoiceunderhighwindconditions,andthebestresultsareproducedwhenboththenormalvelocitiesandthetemperaturearetreatedwiththeradiationschemeinwhichthephasespeedisthesamefordifferentvariables.Whenthebackgroundwindspeedisreasonablysmall,theLBCconfigurationwitheithertheradiationorthezerogradientconditionatbothboundariestendstomakethenumericalsolutionunstable.Thechoiceofaconstantconditionattheinflowboundaryandaradiationoutflowboundaryconditionisappropriateinmostcases.Inthesimulationswithdiurnalthermalforcingatthemodelsurface,differentLBCschemesarecombinedtogethertoreducespurioussignalsinducedbytheoutflowboundary.Aspecificationinflowboundarycondition,inwhichthevelocityfieldsattheinflowboundaryareprovidedusingthetime-dependentresultsofasimulationwithperiodicLBCsoveraflatdomain,istestedandtheresultsindicatethatthespecificationconditionattheinflowboundarymakesitpossibletouseasmallermodeldomaintoobtainreasonableresults.Themodelhorizontaldomainlengthshouldbegreaterthanacriticallength,whichdependsonthedomaindepthHandtheanglebetweengravitywavephaselinesandthevertical.Anestimateofminimumdomainlengthisgivenby[(H-zi)/πU]√N2L2x-4π2U2,whereNandUarethebackgroundstabilityandwindspeed,respectively,Lxisthetypicalgravitywavelengthscale,andziistheconvectiveboundarylayer(CBL)depth.

简介：ＰｒｏｃｅｓｓｏｆｓｏｕｒｃｅｄｙｎａｍｉｃｓｏｆｔｈｅＪｉｎｇｔａｉｅａｒｔｈｑｕａｋｅ（Ｍ＝６．２）Ｘｕｅ－ＢｉｎＤＵ（杜学彬）；Ｚｈｉ－ＤｅＹＡＮ（闫志德）ａｎｄＭｉｎｇ－ＷｕＺＯＵ（邹明武）（ＥａｒｔｈｑｕａｋｅＲｅｓｅａｒｃｈＩｎｓｔｉｔｕ...

简介：SongkeWellNo.2,oneofthemainpartofthescientificdrillingprojectinSongliaoBasin,whichwasdrilled7018mandacquiredthepartofcorescontinuouslyfromtheLowCretaceoustotheCarboniferousandthePermianfromthe2843mdeep,canbeconsideredasthedeepestcontinentaldrillingprojectinAsia.Aimingatthefeaturesoflongerwellsections,largerdiametersandmultiplespud-insforcoringofSongkeWellNo.2,thisprojectbrokethroughthe"coringinsmalldiameterandreaminginlargediameter"spud-indrilling-completionprocedureswhicharealwaysusedinlarge-diameter-wellcoringforcontinentalscientificdrillingprojectsindomesticandoverseasandthedrillingmethodofshort-singlecylinderroundtripfootage.Atthesametime,"coringinthesamediameterandcompletingdrillingatonesinglediameter"wasachievedatallφ311mmandφ216mmcoringsectionsofmorethanonethousandmeterslong,high-efficientoperationwith"drillinglongfootagewithdrilltoolscombinedinmulticylinders"wasachievedatdeepcoringsection.Fourworlddrillingrecordswerecreatedwhichincludemorethanathousandmeterscontinuouscoringatφ311mm,andthefootageperroundtripfootageatφ311mm,φ216mmandφ152mmisallmorethan30m,allofthesebreakthroughsreducedatleast300daysforthisproject;moreover,consideringthecharacteristicsofformationsthatthegeothermalgradientishighinthedrilledsectionsandtheinside-welltemperatureisover240℃afterdrillingcompletion,aformate-polymerwater-basedmudsystemwasdevelopedbycompoundingattapulgiteandsodiumbentoniteandbyaddingindependentlydevelopedhigh-temperaturestabilizer,whichcanprovidecriticaltechnicalsupportforsuccessfulwellcompletionat7018minthesuper-high-temperatureenvironmentItisthefirsttimethatthewater-basedmudisoperatedattheworkingtemperaturehigherthan240℃inChina;Besides,consideringthehigh-qualityrequirementoncoresimposedbytheproject,themethod"mechanicalcor

简介：

简介：

简介：

简介：运用试井分析方法,综合动、静态资料,对ZH2井探边测试资料进行分析评价,确定了储层渗流特征及参数,落实了油藏边界性质及距离,为勘探、开发布井提供了更为可靠的依据.

简介：~~

简介：本文根据青海高原温室增施CO2技术试验结果,阐述了CO2施肥的基本原理,提出了适宜高原温室农业特点的基本技术、施肥方式及注意事项,分析了温室增施CO2所产生的功效,可供地方政府发展"菜篮子"工程时参考。

简介：~~

简介：~~

简介：在岩石中的Pb~(2+)的吸附动力学用离子被学习了选择电极和原子吸收分光光度计。结果证明吸附过程是像分数维图形的反应。吸附率在30分钟前相对高，然后落下。Pb~(2+)和运动参数的浸透的吸附能力(a)(b，高山哈，D和k)与增加Pb~(2+)的起始的集中增加了。这些参数(除了一)当Na+在答案是在场的时，减少了。而且，岩石在粒子大小越小，这些运动参数将是越多bigger，不过参数一是几乎不变的。

简介：像注意到的那样，在实际孔隙介质中大部分液体占据了其自己的孔隙，毛细管压力控制着rc，并且Uw、rc、μs和△P之间的相互关系更复杂。该图说明了应用于更复杂的实际情况的原理：提高Uw将降低毛细管压力，这会降低气体粘度和减小△P。

简介：在2维弦论黑洞背景时空中求解了具有'tHooft的边界条件和“准周期”边界条件的Klein-Gor-don方程和Dirac方程，分别计算了相应的玻色子熵和费米子熵，发现它们具有同一发散形式，两者仅相差一个系数。

简介：

简介：