简介：ThispapercarriesouttheFirstprinciplescalculationofthecrystalstructures(zincblende(B3)androcksalt(B1))andphasetransitionofboronarsenic(BAs)basedonthedensity-functionaltheory.Usingtherelationbetweenenthalpyandpressure,itfindsthatthetransitionphasefromtheB3structuraltotheB1structuraloccursatthepressureof113.42GPa.ThentheelasticconstantsC11,C12,C44,bulkmodulus,shearmodulus,Youngmodulus,anisotropyfactor,KleinmanparameterandPoissonratioarediscussedindetailfortwopolymorphsofBAs.TheresultsofthestructuralparametersandelasticpropertiesinB3structureareingoodagreementwiththeavailabletheoreticalandexperimentalvalues.

简介：Therearefourunitsofhigh-pressuretoultrahigh-pressuremetamorphismextendingfromsouthtonorthacrosstheTongbai-DabieMountains:theepidote-blueschist-faciesunit,thelow-temperatureeclogitefaciesunit,theultrahigh-pressureeclngitefaciesunitandthemedium-temperatureeclogitefaciesunit.ThelatertwounitswereformedduringtheCaledoniansubductionbetweentheTongbai-DabiemicroplateandtheNorthChinaplate,theformertwounitsaretheproductsofIndosiniancontinental-continentalsubductionandcollisionbetweentheYangtzeandtheNorthChinaplates.

简介：这篇论文论述由X光检查衍射填特殊设计的die-casting的模子的直接观察的一些结果，包括有数字模拟的比较。基于作者讨论怎么阻止煤气的陷阱并且建议新方法的如此的工作。

简介：在3月16-17,2008日，海雾在广东省的西方在Dianbai发生了并且被高压的摘要的system.Using伴随全面观察数据集，这研究在这海雾期间分析液体水内容的进化并且调查海雾显示出的在液体水内容和平均直径和主要结果表现为的exchanges.The跟随的雾微滴，空气温度，风速度和骚乱的计数密度(1)之间的关系伪每

简介：Inthiswork,themorphologiesandporestructuresofaseriesofcorncob-derivedactivatedcarbonsandzeolitetemplatedcarbonwithultrahighsurfaceareawerecarefullyinvestigatedbySEM,HRTEMandN2-sorptioncharacterizationtechnologies.Thehigh-pressurehydrogenuptakeperformancewasanalyzedusingstandardPressure-Composition-Temperatureapparatusinordertostudytheporesizeeffectsonhydrogenuptake.Theseas-obtainedporouscarbonsshoweddifferentcharacteristicsofporesizedistributionaswellasspecificsurfacearea.Theresultsindicatethatthemosteffectiveporesforadsorbinghydrogendependedonthestoragepressure.Theseultramicropores(0.65-0.85nm)couldbethemosteffectiveporesonexcessH2uptakeat1bar,however,micropores(0.85-2nm)wouldplayamoreimportantroleinexcessH2uptakeathigherpressureat77K.Atroomtemperature,poresizeeffectsonH2uptakecapacitywereveryweak.BothspecificsurfaceareaandtotalporevolumeplaymoreimportantrolesthanporesizeforH2uptakeatroomtemperature,whichwasclearlydifferentfromthatat77K.Forapplicationsinfuture,thecorncob-derivedactivatedcarbonscanbemoreavailablethanzeolitetemplatedcarbonsat77K.ElementdopingenhancedhydrogenuptakecouldbemainresearchdirectionforimprovingH2uptakecapacityatroomtemperature.更多还原

简介：InwallshotblastingisamethodofimprovingthesurfacehardnessandhightemperatureoxidationresistanceoftheS30432high-pressureboilertube.Thedifferencesonresidualstress,sub-grainsize,micro-hardnessandstructurebetweentheS30432inwallshot-blastingtubeproducedbyBaosteelwithsixtechnologicalprocessparametersandtheimportedsuper304Hwerestudiedsystematicallybycontrasttestresearch.IthasbeendemonstratedthattheS30432obtainsahigherresidualstress,adeeperdistributed...

简介：Byusingsuchflier-platematerial,quasi-isentropiccompressioncanberealized.Basedonit,hypervelocitylaunchingisfurtheraccomplished.Asaresult,anextremelyhighdynamicpressurecanbeobtainedinlaboratory,offeringapracticalmethodforthecomprehensivedeterminationofmaterialsbehavior,response,equation-of-stateandpropertiesindynamicloadingprocess.

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简介：由在扁平的钢带子创伤容器(FSRWV)的墙上分析热转移，全部墙上的温度分发的一个数字模型(包括内部核心墙，扁平的钢带子，夹克衫的外面的柱体；绝缘的层)被作者建立。与模型一起，温度分发；在容器墙中的长度变化；在低温度的扁平的钢带子是计算的；分析。结果证明扁平的钢带子弯屈低温实验法的高压的容器在结构是更简单的，更安全；更容易常规的比那些生产。

简介：Decreasingtherisksandgeohazardsassociatedwithdrillingengineeringinhigh-temperaturehigh-pressure(HTHP)geologicsettingsbeginswiththeimplementationofpre-drillingpredictiontechniques(PPTs).ToimprovetheaccuracyofgeopressurepredictioninHTHPhydrocarbonreservoirsoffshoreHainanIsland,wemadeacomprehensivesummaryofcurrentPPTstoidentifyexistingproblemsandchallengesbyanalyzingtheglobaldistributionofHTHPhydrocarbonreservoirs,theresearchstatusofPPTs,andthegeologicsettinganditsHTHPformationmechanism.OurresearchresultsindicatethattheHTHPformationmechanisminthestudyareaiscausedbymultiplefactors,includingrapidloading,diapirintrusions,hydrocarbongeneration,andthethermalexpansionofporefluids.Duetothismulti-factorinteraction,acloudofHTHPhydrocarbonreservoirshasdevelopedintheYing-QiongBasin,butonlytraditionalPPTshavebeenimplemented,basedontheassumptionofconditionsthatdonotconformtotheactualgeologicenvironment,e.g.,Bellotti’slawandEaton’slaw.Inthispaper,wefocusontheseissues,identifysomechallengesandsolutions,andcallforfurtherPPTresearchtoaddressthedrawbacksofpreviousworksandmeetthechallengesassociatedwiththedeepwatertechnologygap.Inthisway,wehopetocontributetotheimprovedaccuracyofgeopressurepredictionpriortodrillingandprovidesupportforfutureHTHPdrillingoffshoreHainanIsland.

简介：摘要：体积与在SuluUHP岩石上套印的Tan-LuHP糜棱岩porphyroclasticphengite，neoformedphengite和他们的混合物分开与40Ar/39Ar被分析步加热方法。从ultramylonite的neoformedphengite的二件样品给40Ar/39Ar209.9的高原年龄吗？

简介：TheYushugouterrainofhigh-pressuregranulitefaciesinsouthernTianshanMountainiscomposedmainlyofanophiolitesuite.Mostselectedziroconsareroundorellipticalinshape,andsomeareoftetragonalprismwithroundedges.Thegranulometricanalysesshowthattheyarewellsortedinsedimentation.ZrO2/HfO2ratiosinzirconsrangefrom45to57.thesecharacters,togetherwiththepetrologicandgeochemicalcharactersofplagioclase-garnet-orthopyroxenitebearingzircons,indicatethattheprotolithofplagioclase-garnet-orthopyroxenitemaybederivedmainlyfromvolcanicbasesurgesedimentarydebrisinoceanicislandsandfromclaysformedbyseafloorweathering.Zirconsaresimplyofpyroclasticdebris.Theophioliteformationageof(440±18)Maandthefirst-stagemetamorphicage(amphiboliteorgranulitefacies)of(364±5)Mawereobtainedwithamethodofmultiplegrainsindifferentgroupsandamethodofconcordiaplot.TheseagesprovideimportantinformationonthetemporalandspatialoccurrenceofsouthernPaleoxoicTianshanOcean,Thesubductionrateoftheoceaniccrustandtheformationmechanismofophioliteofgranulitefacies.

简介：Thehighpressureequationofstateforcarbonisconstructedbysomesimplephysicalmodels.Forsolidstate,amultiphaseequationofstateisconsidered,whichincludesfoursolidstates.Forliquidstate,theliquidperturbationtheoryofCRISmodelisused.Inthehightemperature,theelectroniccontributionisobtainedbytheionizationequilibriumtheory.Theresultofourcalculationbasedontheabovemodelsiscomparedwiththefirstprincipledensityfunctionalcalculationandtheothermodels.TheHugoniotandthephasediagramofcarbonarealsocomparedwiththeexperiments.Theresultsaresatisfactory.

简介：Thereisawidespreadinterestinleadtelluride(PbTe)asagoodthermoelectricmaterial.WereportthetemperaturedependenceofthermopowerS(T)andresistanceR(T)forPbTeatthedifferentpressuresoffrom1.8GPato5GPaobtainedbyusingthecubicanvilhighpressureapparatus.Withincreasingpressure,R(T)andS(T)decrease.TheeffectofpressureonR(T)islargerthanthatonS(T).Thepowerfactorthatisdeterminedbythermopowerandresistivityincreaseswithincreasingpressure.Thismethodisanefficienttoolforsynthesizinggoodthermoelectricmaterialsathighpressureandhightemperature.

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简介：Theprincipleofnewopticalfibrepressuretransducerisanalysed,andinge-niousdesignschemeofthistransducerisvigen.Thisnewtransducerspecimenisprovidedwithfollowingcharacteristics;experimentaltransmittingdistanceis20m(actuallyupto1000m);systemsensitivityis0.1mV/Pa;powerconsumptionoftheprobeislessthan125μW.Finally,somepointsoftheappraisementaregiveninthispaper.

简介：<正>DearSir,Oculartraumaisatopicofunresolvedcontroversiesandtherearecontinuouscontroversialanddebatablediagnosticandmanagementstrategiesforopen-globeinjuries[1].Amongstmanytypesofoculartrauma,theopenglobeinjuryisthemostseriousduetoitsverypoorvisualprognosisandyoungpopulationofpatientsaremostlyaffected[2].Thetreatmentoutcomemaybeimprovedbypromptdiagnosis,andimmediatesurgicalrepairperformedtohighstandard[3].Amongsttheotherclinicalsignstheintraocularpressure(IOP)isfoundtobeparticularlyreducedandconventionallythisisconsideredasaveryreliableindicatorofoccultglobe

简介：在5GPa的高压力和不同温度的Ti2AlN的稳定性7001600?袰？？

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简介：Thestructuralpropertiesofjadeiteathighpressures(0.0001-30GPa)areinvestigatedusingplane-wavepseudopotentialdensityfunctionaltheorymethod.Asafunctionofpressure,themonocliniccellparameterswerecalculatedandthecompressibilitycoefficientsare0.0026,0.0023and0.0026GPa-1,respectively.Thebondlength,bondangleanddistortionvariationwerestudiedinordertoobtaintheinformationofpolyhedralcompression.Thepressure-volumeequationofstatewasconsideredinordertoobtainthebulkmodulusK0.ComparisonbetweenthecalculatedK0valuesandtheexperimentaldatasuggestedthatthemodelprovidesreasonableinsightsintocrystallographicandphysicalpropertiesofjadeite.