简介：Earthquake-relatedelectromagneticobservationaimsatfindingabnormalelectromagneticvariationassociatedwithearthquakepossibly.Theexistingstudieshaveprovedthatthismethodis,toalargeextent,effectiveinshort-termandimpendingearthquakepredication.Thispapersummarizesprogressanddiscussessomerelatedproblemsinthisfield.Somerequirementsforobservationsystemhavebeenproposedtoimprovemonitoringlevel.AsacaseobservationusingthereformedobservationsysteminJinghaiseismologicstation,Tianjin,someresultsaregiven.

简介：Thisstudyestablishedathree-dimensionalmathematicalmodeltodeterminethefluidflowinaslabcontinuouscastingmoldunderanelectromagneticstirringforce.Theflowstructureanddistributionwerestudiedwithrespecttodifferentcontinuouscastingparametersandstirringcurrent.Basedonthecalculationresults,themoldfluxentrapmentindexinfreesurfaceandvelocityuniformityindexwereusedtoevaluatetheflowfieldinthemold.Thetheoreticalbasisfortheoptimizationoftheflowfieldstructurewasprovided.Thestudyalsosuggestedanoptimizationmethodforelectromagneticstirringparameters.

简介：Significantelectromagneticpulses(EMP)canbegeneratedbytheintensivelaserirradiatingsolidtargetsininertialconfinementfusion(ICF).ToevaluatetheEMPintensityanddistributioninandoutsidethelaserchamber,wedesignedandfabricatedadisconeantennawithultra-widebandsofover10GHz.Thereturnloss(S11parameter)ofthisantennawasbelow-10dBandcouldevenachieveunder-30dBat3.1GHz.TheEMPintensityinthisstudyat80cmand40cmawayfromthetargetchambercenter(TCC)reached400kV/mand2000kV/m.ThecurrentresultsareexpectedtoofferpreliminaryinformationtostudyphysicsregardinglaserplasmainteractionsandwillalsolayexperimentalfoundationforEMIshieldingdesigntoprotectvariousdiagnostics.

简介：Aphysicalmodelwithmercuryasanalogwasdevelopedtoinvestigatetheinfluencesofelectromagneticstirring(EMS)onflowfieldinslabcontinuouscastingwhenthesubmergedentrynozzle(SEN)wascloggedwithdifferentcloggingrates(0,10%,25%,and50%).TheflowfieldinmoldunderdifferentEMScurrents(0,40A,and60A)wasmeasuredbyanultrasonicDopplervelocimeter.Theresultsprovedthattheflowfieldinthemoldwasatypicaldoublerollstructureundernon-cloggingSEN.AstheSENcloggingrateincreased,theflowfieldstructurewastransformedfromadoublerolltoasymmetryflow.Whenthecloggingratereached50%,theupcirculationdisappearedonthecloggedside.Thezoneunderthemeniscusnearthenarrowfacewasanon-flowingarea.EMScouldcorrectbiasflowcausedbySENcloggingandimprovethesymmetryoftheflowfieldduringSENclogging.

简介：高周波的电磁的发出声音作为地来源是用自然的高周波的电磁的地的一个电磁的探索方法。它比直接当前的方法有更高的分辨率和更大的深度穿入并且为地热的精力探索是特别合适的并且低--并且中间水平的地下水察觉。我们介绍为评估地热的水资源的高周波的电磁的发出声音的成功的应用。高频率电磁的系统(有到1Hz的从10KHz的一个频率范围的MT-U5A)首先被使用从中国取样域数据。一个遥远的参考车站被用来保证取样的数据质量。我们然后执行2D倒置图象与电的方法数据处理。结果基本上显示地下的地热的水的空间分发并且提供有利线索给在这个区域发现表面下的地热的水的来源。

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简介：Basedontheelectromagneticfieldtheory,theopticalsignaltransmissioncharacteristicsininput/outputwaveguides,slabwaveguidesandarrayedwaveguidesofthearrayedwaveguidegrating(AWG)multi/demultiplexerareanalyzed.TherelationshipbetweenthephysicalparameterssuchasgeometrysizesandrelativerefractiveindexinAWGmulti/demultiplexerandtheopticalsignaltransmissioncharacteristicsarediscussed.ThistheoreticalstudycanbeusedforoptimizingthedesignandimprovingtheperformanceoftheAWGmulti/demultiplexer.

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简介：Tostudytheelectromagnetic(EM)backscattercharacteristicsoffreakwavesatmoderateincidenceangles,weestablishanEMbackscatteringmodelforfreakwavesin(1+1)-dimensionaldeepwater.ThenonlinearinteractionbetweenfreakwavesandBraggshortwavesisconsideredtobethebasichydrodynamicspectramodulationmechanisminthemodel.NumericalresultssuggestthattheEMbackscatteringintensitiesoffreakwavesarelessthanthosefromthebackgroundseasurfaceatmoderateincidenceangles.Thenormalisedradarcrosssections(NRCSs)fromfreakwavesarehighlypolarisationdependent,evenatlowincidenceangles,whichisdifferentfromthesituationfornormalseawaves;moreover,theNRCSoffreakwavesismorepolarisationdependentthanthebackgroundseasurface.NRCSdiscrepanciesbetweenfreakwavesandthebackgroundseasurfacewithusinghorizontaltransmittinghorizomtal(HH)polarisationarelargerthanthoseusingverticaltransmittingvertical(VV)polarisation,atmoderateincidentangles.NRCSdiscrepanciesbetweenfreakwavesandbackgroundseasurfacedecreaseswiththeincreaseofincidenceangle,inbothHHandVVpolarisationradars.Asanapplication,inthesynthetic-apertureradar(SAR)imagingoffreakwaves,wesuggestthatfreakwavesshouldhaveextremelylowbackscatterNRCSsforthefreakwavefacetwiththestrongestslope.Comparedwiththebackgroundseasurface,thefreakwavesshouldbedarkerinHHpolarisationechoimagesthaninVVechoimages,inSARimages.FreakwavescanbemoreeasilydetectedfromthebackgroundseasurfaceinHHpolarisationimagesthaninVVpolarisationimages.Thepossibilityofdetectionoffreakwavesatlowincidenceanglesismuchhigherthanathighincidenceangles.

简介：Itisshownthatthe’scale-transformation’methodproposedbyLiYing-Leetal.isnotapplicabletotheMaxwelltheory.

简介：Aim:ToobservetheapoptoticchangesfollowingexposuretoEMPandtoexplorethepossibleinjurymechanisminNIH-3T3fibroblasts.Methods:FollowingNIH-3T3cellswereexposedtoEMP,theproliferationandviabilityofNIH-3T3fibroblastswereestimatedbyhemacytometerandMTTMeasurements.Apoptoticratewasmeasuredbyflowcytometer.TheimnmohistochemicalSPmethodwasusedtodeterminebcl-2,p53.ThepositivelystainedcellswereanalyzedwithCMIAS-Ⅱimageanalysissystematamagnification400.AlldatawereanalyzedbySPSS8.0software.Results:TheproliferationandviabilityofNIH-3T3cellsweremarkedlyinhibitedandsignificantapoptosiswasinducedfollowingexposuretoEMP.EMPcouldincreasethenumberofnon-adherentcells,thehighestratio(33.9%)ofnon-adherentcellsalsooccurredat6h.TheAs70valueofMTTdecreasedimmediatelyat1h,6hfollowingthecellswereexposedascomparedwiththecontrol(P＜0.05).Thehighestratioofapoptosiswas15.07%at6h,thendecreasedgradually.Down-regulationofbcl-2andup-regulationofp53wereinducedbyEMP(P＜0.05).Conclusions:EMPcouldpromoteapoptosisofNIH-3T3fibroblasts.EMPcouldalsodown-regulatebcl-2levelandup-regulatep53levelinNIH-3T3fibroblasts.Bcl-2andp53genemaytakepartintheprocessofapoptosis.

简介：Basedonthecasestudiesandstatisticalanalysisofearthquake-relatedionosphericdisturbancesmainlyfromDEMETERsatellite,ground-basedGPSandionosoundingdata,thispapersummarizesthestatisticalcharacteristicsofearthquake-relatedionosphericdisturbances,includingelectromagneticemissions,plasmaperturbationsandvariationofenergeticparticleflux.AccordingtothemainresultsdonebyChinesescientists,fusingwiththeexistedstudyfromglobalresearches,seismo-ionosphericdisturbancesusuallyoccurredafewdaysorhoursbeforeearthquakeoccurrence.Parallelingtothesecasestudies,lithosphere-atmosphere-ionosphere(LAI)couplingmechanismsarecheckedandoptimized.Athermo-electricmodelwasproposedtoexplaintheseismo-electromagneticeffectsbeforeearthquakes.Apropagationmodelwasputforwardtoexplaintheelectromagneticwavesintotheionosphere.Accordingtotherequirementofearthquakepredictionresearch,Chinaseismo-electromagneticsatellite,thefirstspace-basedplatformofChineseearthquakestereoscopicobservationsystem,isproposedandplannedtolaunchatabouttheendof2014.ItfocusesoncheckingtheLAImodelanddistinguishingearthquake-relatedionosphericdisturbance.ThepreliminarydesignforthesatellitewilladoptCAST-2000platformwitheightpayloadsonboard.Itisbelievedthatthesatellitewillworktogetherwiththegroundmonitoringnetworktoimprovethecapabilitytocaptureseismo-electromagneticinformation,whichisbeneficialforearthquakemonitoringandpredictionresearches.

简介：我们讨论使用控制来源的可行性电磁(CSEM)在为勘探海洋的煤气的水合物的频率领域。把腿164日志数据基于钻节目(ODP)的海洋，我们建立了抵抗力建模有不同煤气的水合物集中的几1-D。同时，我们基于这些模型在频率领域分析了海洋的煤气的水合物的电磁的反应。我们也学习了在象接收装置传输器距离和频率那样的电的fi高龄大小或阶段和参数之间的关系。我们的数字建模结果为探索和海洋的煤气的水合物的资源评估向我们提供一本量的参考书。

简介：合适的频率试验性地被选择是电磁的声学的变换器的操作频率。从钢和橡胶材料的一件多层的粘合剂样品的检测超声的回响的即时振幅，阶段和频率被计算并且创作了形成成功把严峻的信号与不同粘合剂状态品质上区分开来的三维的即时光谱。然后，在敏感时间窗户中的平均即时参数被拣起并且为BP人工的神经网络用作输入特徵向量。在训练并且测试体积的识别结果证明检测了电磁的超声的界面的回响能与比95%大的正确性比率自动地被识别并且分类。

简介：Inthispaper,aspiralmagneticfieldelectromagneticstirrer,whichcanseparatelyinducetwodifferentmagneticfields,isintroduced.Thecorrespondingcentralmagneticfluxcurvesofthestirrerweremeasuredbytwodif

简介：以便在海洋的控制来源压制电视广播噪音电磁(CSEM)数据，我们与合成的孔来源一起建议一个3Ddeconvolution(3DD)interferometry方法并且获得相对异例系数(皇家装甲兵)对表演的EM领域思考回答为压制电视广播的度。我们为压制电视广播分析建议方法的潜力，并且在他们的有效性把建议方法与传统的方法作比较。长度被导出的一个方法到精选合成来源和水深度在上的效果皇家装甲兵经由数字模拟被检验。结果建议与合成来源一起的那个3DDinterferometry方法能有效地压制电视广播并且提高海洋的CSEM的潜力到烃探索。

简介：Inthispaper,anewprocesstofabricateanelectromagneticsteppingmicromotorusingsurfacescarificiallayertechnology(SSLT)isillustrated,andtheSEMphotoofthesteppingmicromotorisshowed.Thetorqueofthesteppingmicromotorwithmaxsimumtorqueof60μNmisdirectlycalculatedbyusingelectromagneticslawsandthelawofconservationofenergy.ThestatorandtheshaftandtherotorofthemicromotorwiththematerialofnickelarefirstallfabricatedbynormalLIGAprocessatthesametime.ThesacrificiallayerstructurewiththematerialofAZresistismadeonthesurfaceoftherotorbyusingSSLT.ThestatorandtheshaftarefixedtogetherwithcoppersubstrateinsteadoftheoldTisubstratebyelectroplating.AfterremovingtheTisubstrate,PMMAresistandthesacrificiallayerstructure,therotorisseparatedfromthestatorandnewcoppersubstrate,andcanrotateonthenewsubstratedrivenbymagneticforce.Thefourcoilswith300turnseacharewoundonironbarsbyhandusingmicroscopeandsteppingmotor.Thebarsareassembledbyhandintothestatorholesfromrearofnewcoppersubstratetofromamagneticcircuitwiththestatorandtherotor.Apowersupplywithfourconsecutivepulsesprovidesthecurrentforthecoilswoundontheironbarsadnproducesthemagneticforcetodrivetherotortorunwiththespeedof60rpm.

简介：Inthisstudy,afowsolverwasdevelopedbasedonthegoverningRANSequationsofcompressiblefowsandwasfurtherextendedtoincludetheefectsofelectromagneticforcesnamelyLorentzforces.Lorentzforcesmaybeaddedasasourceterminthegoverningfuidfowequations.NumericalstudieswerecarriedoutforNACA0015aerofoilathighanglesofincidencesfrom15to30andcomparedwithsomeavailablecasesofexperimentalandincompressiblenumericalsolutions.Thehydrodynamicsperformancewasimprovedusingamagneticmomentumcoefcientofupto0.048.Thesizeoffowseparationzonewasdecreasedorcompletelyeliminatedbyincreasingthiscoefcient.Theoveralldragwasnotchangedconsiderably,howevertheoverallliftwasincreasedupto80percentatstallangles.

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简介：Inthispaper,asetofclosed-formformulasforvectorFiniteElementMethod(FEM)toanalyzethreedimensionalelectromagneticproblemsispresentedonthebasisofGaussianquadratureintegrationscheme.Byanalyzingtheopenregionproblems,thefirst-orderAbsorbingBoundaryCondition(ABC)isconsideredasthetruncationboundaryconditionandtheequationiscarriedoutinaclosed-form.Basedontheformulas,thehybridExpandedCholeskyMethod(ECM)andMultiFrontalalgorithm(MF)isappliedtosolvefiniteelementequations.Usingtheclosed-formsolution,theelec-tromagneticfieldofthreedimensionaltargetscanbestudiedsententiouslyandaccurately.Simulationresultsshowthatthepresentedformulasaresuccessfullyandconcise,whichcanbeeasilyusedtoanalyzethreedimensionalelectromagneticproblems.