简介:Thecentral-axiszoncformedinMesozoic-CeozoiceraandoccurrcdalongLanping-Simaodepres-sion,Yunnan,isaspccialtcctonicunit’ItisnamedfortheLanping-Pucrtectono-thcrmo-metamorphicupwarpingzone.Itsmaincharacteristicsarc:1.Therockhasbcenmetamorphosedandtherccenthotspringsoccura1ongthezone,whichisahigh-tempcrat
简介:TheRockyMountainFoothillsliealongtheeasternmarginoftheRockyMountainfold-thrustbelt.TheareahasbeenthefocusofextensiveresearchaimedatlocatingoilandgasfieldswiththepotentialtobeusedasCO_2storagetraps.Inthisstudy,weuseaseismiclinefromtheCanadianRockiestointerpretthegeologicstructuresalongacross-sectionparalleltothetectonictransportdirection.Wethencompareourresultswiththoseofpreviousstudies.ThesectionwasrestoredusingtheMOVEsoftware(manufacturedbyMidlandValleyExplorationLtd.).Theprimaryobjectivesofthisworkare:(1)toconductastratigraphicandstructuralinterpretationofa2Dseismicprofile;and(2)toconductacross-sectionalrestorationofthestructuresinordertovalidatetheseismicinterpretationintermsofCO_2storagecandidates.Additionaldatasourcesincludemapsofthesurfacegeology,whichshowthattheageofhorizonsdecreasefromwesttoeast,andstratigraphicandstructuralprofilesderivedfromwelllogs.Theresultsofourstructuralrestorationindicateadetachmentfaultbetweentheforelandandhinterland.ThisfaultisresponsibleforthecuttingandsubsequentupwardsandeastwardsmovementofastratumlocatedbetweenthebasementandtheLateDevonianformation.Largethrustfaultsareresponsibleforthedeformationofstrata(throughbothfoldingandfaulting)
简介:Thedepletionrateofphosphateinthesoil-rootinterfacezoneincreasedalongwithgrowthandphosphateuptskeofwheatormaize,whichindicatedthatthephosphatedistributioninsoilneartherootsurfaceagreedwellwiththephosphatemovementinrhizosphereandphosphateuptakebyplant,Therelativeaccumulationzoneofphosphatewithin0.5mmapartfromtherootsurfacedevelopedatthe15thdayorsoaftercultivatingwheatormaizesincetherootphosphatesecretionincreasedgraduallyinthisstage.Thephosphatedistributioninthesoil-rootinterfacezoneagainstthegrowingtime(t)andthedistancefromtherootplane(x)couldbedescribedbythenon-linearregressionequationwiththethirdpowersofxandt.
简介:1.ObjectivesTheMoheBasininHeilongjiang,ChinahasaNEEthrustnappebelt,whichwasassembledbytherootzone,middlethrustzoneandthrustfront,north-southandnorth-eastnormalfaultswiththreetectonicactivitiesoftheMiddleJurassicto.Eocene,theMiocene,andtheEarlytoMiddlePleistocene.Themiddlethrustzoneandthrustfronthasalargenumberoffolds,thrustfaults,fracturesandglutenites,whicharethemajorstructuresofgashydrateaccumulationintheMoheBasin.
简介:Wehaveobservedsomekindsofdefectsinunseededrapidzone-melting-recrystallized(RZMR)SifilmsformedwithaRF-inducedgraphitestripheatersystem,usingcross-sectionspecimenelectronmicroscope.Theobserveddefectsaresubgrainboundaries(SGB),dislocationsandmicrotwins.ThemostcommonlyobserveddefectsareSGBwhichformedasaresultofsomeorientationdifferencesbetweenadjacentgrainsduringtheirrapidself-nucleationgrowth.MixedtypeSGBwerefrequentlyobserved,althoughsomepuretiltortwistSGBexistedalsointheSifilms.Therotationangularcomponentaroundtheaxisparalleltoscanningdirectionismuchlargerthanthataroundotheraxes.SGBconsistprimarilyofarraysofdislocationandhavecrystallographicangulardeviationsofonedegreeorless.DuringSifilmcooling,dislocationsandmicrotwinswereformedduetonon-uniformthermalstress.ThecrystallographiccharactersofthedislocationsinSifilmsarethesameasthoseincommonbulkSisinglecrystals.TheirBurgersvectorsareb=a/2<110>.Somedis-locationsrunacrosstheSifilm,andtheamorphousSiO2layersonandunderneaththeSifilmcaneffectivelyblockthedislocationsandpreventthemfromenteringthelayers.MicrotwinswereobservedintheSifilmssometimes,thetwinningplanesbeing{111}.
简介:Aplasticdeformationzonenearascrewdislocationistreatedasanequivalenttrans-formationinclusionbymeansoftheEshelbyinclusiontheory.Aclosed-formsolutionfordeter-miningtheinteractionbetweenascrewdislocationandaplasticallydeformedzoneofanarbitraryshapeisobtainedbyusingthesolutionbetweenadislocationandanequivalenttransformationinclusion.
简介:Basedonthebasicideaofzonemodelingmethod,atwo-layerzonemodelisdevelopedandprogrammedtocalculatethefiregrowthandsmokespreadinamulti-roombuidingsubjectedtoafire.Therelatedpredictiveequations,numericalsimulationmethodandsub-modelsimplementedinthismodelareconciselydescribed.AsetofexperimentaldatafromCooper'sworkatNISTforatwo-roomcompartmentfirearechosenforcomparisonwiththemodelandprogram,andthenumericalresultsfundamentallyagreewellwiththeexperimentaldata,Then,anexampleofnumericalcalculationofatwo-stoyduildingfireispresented,andtherelevantoutputresultsaregivenandanalyzed.
简介:Thepatternofthesubtletraps,inwhichoilandgasaccumulated,intheburied-hillfaultedzoneintheJiyangsagisverycomplicated,andveryhardtoprospect.Thepaperanalysesthemaindifficultiesinexploringthecomplicatedburied-hillfaultedzoneoftheareafromapointofgeology.Thetypicalpatternoftheburied-hillzoneintheJiyangsagisstudiedusingtheforwardmodeling.Target-orientlayoutdesignandfull3-Dseismictechnology,whichareusefulforoilandgasexplorationonthezone,areputforward.Takingtheexplorationforoilandgastrapsonthezoneasanexample,certaintechnologiesandtheeffectoftheirapplicationsaboutthedesignfortargetacquisition,acquisitiononawide-azimuth,pointsourcesandpointreceiversarediscussed.
简介:Threemajorthreatstooceansecurityandcoastalzonesustainability-globalwarming,thelossofoceanbiodiversity,andpollution-arecombiningtothreatentheecologicalintegrityofourmarineenvironmentandlifesupportsystems.Weputforwardageomatics-basedsystemsengineeringarchitecturetoidentifythelocationandextentofoilspills,therebyimprovingtheecologicalintegrityoftheworld'soceansandhelpingcontingencyplannerstodeterminerequiredassets,personnelandotherresources.Thisreal-time,event-basedandcosteffectiveemergencymanagementdecisionsupportsystemcanaidintheclassification,detection,andmonitoringofoilspillsinthemarineenvironment.ThedevelopedSynthetic-ApertureRadar(SAR)processingandcalibrationtechniquesefficientlymonitorenvironmentalchangesininaccessibleoceanregions,characterizeoilspillscenarios,andhelptoidentifyspillsources.ThesystemisusedtoimproveemergencymanagementintheGulfofMexico,withapplicationtooilspillsarisingfromHurricaneKatrina.
简介:BACKGROUND:Astrocytesreactsensitivelytocerebralischemia,causingreactiveproliferationandactivation,whichmaycontributetotheireffectinprotectingorinjuringneuronalregeneration.Whetheracupuncture,asatreatmentforcerebralischemia,regulatestheactivatedstateofastrocyteshasbecomeafocusofrecentinvestigations.OBJECTIVE:Toobservetheeffectsofelectroacupuncture(EA)onultrastructurechangesandreactiveproliferationofastrocytesinthemarginalzoneoffocalcerebralischemiainrats.DESIGN,TIMEANDSETTING:Randomized,controlledanimalstudy.ThisstudywasperformedattheExperimentalAnimalCenterofGuangzhouUniversityofTraditionalChineseMedicinebetweenDecember2007andJuly2008.MATERIALS:Atotalof90maleWistarratswererandomlydividedintoshamoperated,modelandEAgroups.Eachgroupwassubdividedinto1hour,1,3,7,and21dayspost-cerebralischemiagroups,withsixanimalsforeachtimepoint.Rabbitanti-ratglialfibrillaryacidicprotein(GFAP)andgoatanti-rabbitIgG/tetramethylrhodamineisothiocyanatewereprovidedbyBeijingBiosynthesisBiotechnology.TheG-6805electricacupunctureapparatuswasprovidedbyShanghaiHuayi.METHODS:Heat-coagulation-inducedocclusionofthemiddlecerebralarterywasperformedtoestablishamodeloffocalcerebralischemia,inthemodelandEAgroups.Middlecerebralarterieswereexposedwithoutocclusioninshamoperatedgroup.EAwasappliedimmediatelyaftersurgeryintheEAgroup,4/20Hz,2.0-3.0V,1-3mA,toBaihui(GV20)andDazhui(GV14),for30minutes.Thetreatmentwasperformedonceaday.Theshamoperatedandmodelgroupsdidnotreceiveacupuncture.MAINOUTCOMEMEASURES:Inthemarginalzoneoffocalcerebralischemiainratsatdifferenttimepointsafterintervention,theultrastructurechangesofastrocyteswereobservedbyusingtransmissionelectronicmicroscopy.GFAPexpressioninastrocyteswasalsomeasuredbylaserconfocalscanningmicroscopy.RESULTS:Cellswellingandrapidproliferationofastrocytes
简介:水力的断裂是过去常从水库刺激uid生产的一种强大的技术。充分3-D水力的断裂进程的数字模拟对这种技术的effcient应用程序很重要,但是因为,也是大挑战强壮的非线性的联合在之间粘滞uid和破裂繁殖的ow。由利用一个连贯的地区方法模仿破裂过程,一个有限元素模型基于存在毛孔压力,连贯的有限元素被建立了在无限的有弹性的媒介调查塑造便士的水力的破裂的繁殖。水力的破裂行为上的连贯的材料参数和uid粘性的效果被调查了。在破裂过程被岩石破裂坚韧统治的限制案例的有限元素结果和分析答案之间的优秀同意表明连贯的地区的能力在为这个案例模仿水力的破裂生长的有限元素模型。