简介：Ｓｔｒａｉｎ┐ｇｅｏｅｌｅｃｔｒｉｃｒｅｓｉｓｔｉｖｉｔｙｐｒｅｃｕｒｓｏｒａｎｄｔｈｅｖｉｒｔｕａｌｄｉｓｌｏｃａｔｉｏｎｍｏｄｅｌｔｏｔｈｅＴａｎｇｓｈａｎｅａｒｔｈ┐ｑｕａｋｅＹＵ－ＬＩＮＺＨＡＯ（赵玉林），ＪＵＮＬＵ（卢军），ＺＨＥＮＧ－Ｎ...

简介：Thefirst±500kVproject(bipolar),GezhoubatoShanghaiHVDCproject,hasbeensetupandputintooperationin1990inChina.TheHVDClineis1000kmlong,interconnectingthecentralandeastelectricpowernetworksofChina.Itisnecessarytomeasuretheextensiveearthresistivityof

简介：ＴｈｅｖａｒｉａｔｉｏｎｓｏｆｔｈｅｄｅｇｒｅｅｏｆｇｒｏｕｎｄｒｅｓｉｓｔｉｖｉｔｙａｎｉｓｏｔｒｏｐｙｄｕｒｉｎｇｔｈｅＴａｎｇｓｈａｎｅａｒｔｈｑｕａｋｅＴｏｎｇ－ＥｎＭＡＯ（毛桐恩）；Ｔｉｅ－ＣｈｅｎｇＷＡＮＧ（王铁成）；Ｊｉａ－ＬｉｕＹＡＯ...

简介：Toanalyzetheeffectofmetaloxideonelectricalresistivityofconductivewoodcharcoal,woodpowderofMassonpinewasmixedwithferricoxide(Fe_2O_3)andnickeloxide(NiO),respectively,andthenthemixedpowderswerecarbonizedathightemperatureinalaboratory-scaletubefurnaceinanitrogenatmosphere.DCY-3resistivitytesterwasusedtomeasureelectricalresistivityofconductivewoodcharcoal.Whencarbonizationtemperaturewas1200℃,theelectricalresistivityofcontrolsamples,Fe_2O_3(...

简介：我们加亮与复杂地形学由一个抵抗力模型和本地精炼使用未组织的网孔的灵活性。地形学的效果被强调。基于这，我们计算了分层的模型的一个特定的班并且发现精确性不由利用标准途径总是是令人满意的。作为改进，我们作为参考模型采用了分层的地球计算wavenumbers。比较证明精确性被使用这条提高的途径更加改进。

简介：ＴｈｅｐａｔｔｅｒｎｃｈａｒａｃｔｅｒｉｓｔｉｃｓｏｆｔｈｅｔｅｎｄｅｎｃｙｖａｒｉａｔｉｏｎｓｏｆｅａｒｔｈｒｅｓｉｓｔｉｖｉｔｙａｎｄｉｔｓｒｅｌａｔｉｏｎｔｏｅａｒｔｈｑｕａｋｅｓＨｅ－ＹｕｎＺＨＡＯ（赵和云）（ＥａｒｔｈｑｕａｋｅＲｅｓｅａｒ...

简介：ThePNjunctionphotodiodeisfabricatedwithhighresistivityP-typesilicon(ρ＝12000Ω·cm).TheexperimentalC-Vcurveswithandwithoutlaserradiationweremeasured.Therelativechangeofcapacitancecanbegreaterthan100%,whichismuchgreaterthantherelativechangeforlowresistivityP-typesilicon.Therelativechageofcaacitancewithandwithoutlaserradiationatzerobiasis121.7%.

简介：Inthispaper,responsesofanewdual-inductionresistivitylogging-while-drilling（LWD）toolin3Dinhomogeneousformationmodelsaresimulatedbythevectorfiniteelementmethod（VFEM）,theinfluencesoftheborehole,invadedzone,surroundingstrata,andtooleccentricityareanalyzed,andcalibrationloopparametersandcalibrationcoefficientsoftheLWDtoolarediscussed.TheresultsshowthatthetoolhasagreaterdepthofinvestigationthanthatoftheexistingelectromagneticpropagationLWDtoolsandismoresensitivetoazimuthalconductivity.Bothdeepandmediuminductionresponseshavelinearrelationshipswiththeformationconductivity,consideringoptimalcalibrationloopparametersandcalibrationcoefficients.Duetothedifferentdepthsofinvestigationandresolution,deepinductionandmediuminductionareaffecteddifferentlybytheformationmodelparameters,therebyhavingdifferentcorrectionfactors.Thesimulationresultscanprovidetheoreticalreferencesfortheresearchandinterpretationofthedual-inductionresistivityLWDtools.

简介：Theeffectofannealingconditiononsputteredindiumtinoxide(ITO)filmsonquartzwiththethicknessof200nmischaracterizedtoshowenhancedopticaltransparencyandoptimizedelectricalcontactresistivity.Theas-depositedgrownITOfilmexhibitsonly65%and80%transmittanceat532and632.8nm,respectively.Afterannealingat475°Cfor15min,theITOfilmisrefinedtoshowimprovedtransmittanceatshorterwavelengthregion.Thetransmittancesof88.1%at532nmand90.4%at632.8nmcanbeobtained.The325-nmtransmittanceofthepost-annealedITOfilmisgreatlyincreasedfrom12.7%to41.9%.Optimizedelectricalpropertycanbeobtainedwhenannealingbelow450°C,leadingtoaminimumsheetresistanceof26Ω/square.SuchanITOfilmwithenhancedultraviolet(UV)transmittancehasbecomeanalternativecandidateforapplicationsincurrentUVphotonicdevices.Themorphologyandconductanceoftheas-depositedandannealedITOfilmsaredeterminedbyusinganatomicforcemicroscopy(AFM),showingagreatchangeontheuniformitydistributionwithfiniteimprovementonthesurfaceconductanceoftheITOfilmafterannealing.

简介：

简介：Theearth-resistivitychangerecordedbeforetheJingtaiearthquake(EQ).withMs=6.2at11geoelectricstationswithin400kmoftheEQwasdiscussedinthispaper,andthefollowingconclusionsaremade:1)imminentvariationsofearth-resistivitypriortotheEQwererecordedattheWuwei,DingxiandShandanstationsimmediatelybeforetheEQ;2)therecordabilityoftheimminentvariationsatastationwasrelatedtotheactivedeepfaultsandthestronglyactivefaultsinsideandoutsidethefocalzone,andtothecausativestressfieldaswell;3)thetemporalandspatialcharacteristicsoftheearth-resistivitychangeimmediatelybeforetheEQshowedthattheEQwasprobablyinducedbytheNNWdirectionstressfield(orbyanotheroneofsimilardirection)whichwasgreatlyincreasedduringashortperiodimmediatelybeforetheEQandthatthenorthernwallofthefocalfaultplayedamajorroleintheprocessoftheEQpreparationandoccurrenceoftheEQ.

简介：在3D抵抗力倒置最小化答案的数字，在倒置的一个固有的问题，考虑的数据的数量不得不大，优先的限制需要被使用。关于一个地质的异例的程度的地质、地球物理的数据是重要优先的信息。我们在3D建议形状限制的使用电的抵抗力倒置。三加权的直角的向量(正常和二正切向量)被用来在异例的边界控制抵抗力差别。异例的边界上的异例和限制的空间形状因此被建立。我们在3D抵抗力倒置的客观功能合并了空间形状限制并且与空间形状限制构造了3D抵抗力倒置方程。随后，我们使用了抑制方向向量和3D抵抗力倒置的重量的基于优先的空间形状数据的数字建模。我们建立了在方向向量和重量之间的一个合理范围，并且验证了使用空间形状的可行性和有效性在减少过多的结构和答案的数字的优先的限制。我们使用了优先的空间地抑制形状的倒置方法在广州地铁定位含水土层。空间形状限制从渗透雷达数据的地面被拿。含水土层的地点和形状的倒置结果与钻倒置的数据，和数字同意解决方案显著地被减少很好。

简介：Constrainedgroovepressing(CGP)isanewsevereplasticdeformationmethodsuitableforproducingultra-finegrainedsheetmetals.Inthiswork,theprocessingefficiencyforamuti-passCGPofpurecopperwasinvestigated.Witharelativelysmallgroovewidthof2mmandtightconstraint,asharpvariationofmechanicalpropertieswithpassnumberisobserved.Subgrainswiththesizeof*0.5lmhavedistinctboundaries,whichisthepredominantfeatureinthemicrostructureafterthreepasses.Theevolutionofdeformationhomogeneitycharacterizedbymicro-hardnessdistributionwasexaminedindetail.Observationsofopticalmicrographsandfracturesurfacemorphologyconfirmtheevolutionrule.Therelationbetweenelectricalresistivityandaccumulativeplasticstrainwasdiscussed.Crystallinedefects,micro-cracks,andmicrostructureuniformitytogetherdeterminethechangeofelectricalresistivityofCGPcopper.

简介：

简介：Epoxyresin/Ni@Cnanoparticlecompositeswithalignedmicrostructurewerepreparedbyusingaprocedureofmagneticfieldassistedcuring.Theresultsshowthattheresistivityofcompositesexhibitsnegativetemperaturecoeffcient(NTC)effectaboveroomtemperature,andcanbeadjustedbyvaryingthecontentfillerandthemagnitudeofmagneticfieldapplied.Hill'squantumtunnelingmodelwasmodifiedtounderstandtheelectricalconductionmechanisminthecomposites.ItshowsthattheNTCeffectascribestothedominantthermalactivatedtunnelingtransportofelectronacrossadjacentnanoparticles,aswellasthelowthermalexpansivityofepoxyresinmatrix.

简介：以便在缺乏合适的priori信息的情况中更可靠地并且有效地解释垂直电的发出声音数据，二个反的计划被建议转换由使用粒子的联合抵抗力和导致的极化数据聚集优化技术。基于导致的极化的计算公式，为chargeability/polarizability数据的倒置能被转变成转换相等的抵抗力数据。然后，为联合数据的倒置能被分解成二个过程：转换抵抗力数据和转换相等的抵抗力数据。一个顺序的倒置计划被介绍顺序运用二个过程。对比到顺序的计划，同时的被建议转换抵抗力和导致的极化数据同时。两个都，顺序、同时的计划为更多的探索目的经由中心进步的粒子群优化算法被执行。数字实验证明两个都，设计倒置算法能转换抵抗力和导致的极化数据成功地与快集中和高精确性，甚至表现在一个大搜索空格。反的结果比得上从概括线性方法的结果。作为一个近似重要性刺绣花样，粒子群优化基于算法能方便地提供以后的分析。我们采用转换模型参数的以后的概率分布评估倒置的表演和无常。以后的分析和测试的进一步的地数据证明建议倒置算法执行等价区域的好采样并且保证全球最佳能在高概率区域定位。

简介：为有状态的纬-法律气体方程的isentropicmagnetohydrodynamics(MHD)的二维的海军司烧方程，纬鈮?1，并且无限的电的抵抗力，我们执行分类可能的所有的全球分析粘滞吃惊侧面。精确，我们证明旅行波浪颂诗关于属类的阶段肖像由二个休息点连接了由的任何一个组成一粘滞宽松的侧面否则四休息指，二僵绳和二个节点。在后者配置，它休息，点被侧面连接取决于粘性，和罐头的比率包含宽松，overcompressive，或undercompressive吃惊侧面。考虑同样三维的答案，undercompressive震动是宽松类型的(Alfven)飘动。为单原子、两价的盒子纬=5/3和纬=7/5，与为无磁性的气体的标准粘性比率，我们数字地发现节点被侧面由把僵绳连接到节点的宽松的侧面围住的overcompressive的一个家庭连接，没有undercompressive震动发生。我们执行显示这些，二维的吃惊介绍的所有是线性地并且非线性地稳定的系统的数字Evans功能分析，关于二维、三维的不安。为一样的煤气的常数，而是不同粘性比率，我们也调查undercompressive震动为出现的案例；这些数字地被看见也稳定，关于二维并且(在到附近的Riemann答案的集中的中立意义)三维的不安。

简介：Theimplantedionrange,thedepthprofileandthefilmsttuctureoftheimplantedlayerwerestudied;thecarrierconcentrationandthemobilityweremeasured;theconductivitymechanismofthefilmimplantedFeintoAl2O3ceramicwasdiscussed.TheconclusionisthattheimplantedFe2+ionsmoveintoAl2O3latticeandreplaceAl3+toformsubs-titutionimpuritiessothattheionimplantedlat-tice,ascomparedwiththeoriginalone,presentsaneffectivenegativechargewhichformsanegativechargecenter.Avacancyisboundarroundit,andanacceptorisintroducedintheforbiddenband.

简介：TheresistivityofHg0.89Mn0.11Tehasbeenmeasuredbythesuperconductingquantuminterferencedevicemagnetometerinthetemperaturerangefrom5to200Kundertheappliedmagneticfieldof1,2,4and6.5Tesla,respectively,comparedwiththatofno-magneticfield.Theresultsshowthattheresistivityincreaseswithincreaseappliedmagneticfieldathighertemperaturefrom80to200K,butdecreasesatlowertemperaturefrom5to25K.Thereexistsatransitiverangefrom25to80K,wherethevariationoftheresistivityshowsdifferenttendenciesdependingonthestrengthofmagneticfield.Maximumdifferenceofresistivityunder6.5Teslafromthatwithoutmagneticfieldinthetemperaturerangefrom30to200Kisonlyabout5Ω·cm,butitincreasesupto3ordersofmagnitudeat5K.TheanalysisshowsthatthevariationofresistivityofHg0.89Mn0.11Teunderthemagneticfieldisthealgebraicsumofthetransversedirectionmagnetoresistanceeffectandthesp-dexchangeinteractioneffect.TDRMEplaysmajorroleinthehightemperaturerange.However,withthedecreaseoftemperature,theeffectofsp-dEIontheresistivitygraduallyexceedsthatofthetransversedirectionmagnetoresistanceeffectthroughthetransitiverange,andbecomesthedominanteffectinthetemperaturerangefrom5to25K,whichleadstothedramaticdecreaseofresistivity.

简介：Hutubi()井块DX12的河水库是在构造背景下面的一座lithologic烃水库。在这个区域的主要的含有石油的沙身体是薄的并且有一个差的横向的连接。因为油水关系的复杂性，油水库介绍一个低抵抗力特征，它把大困难带到烃水库鉴定。这篇文章开发能满足很好记载评估的低抵抗力水库的要求的井木头解释的一个有效方法。作者联合油水库地质学特征，记载曲线特征的油井和为低抵抗力分析原因的化学分析数据，然后建立适当水库参数解释模型，它使用不同浸透计算方法根据不同的代。当泥土内容是超过5%时，我们选择W-S双水模型；当页岩内容是超过13%时，我们使用Schlumberger公式；当页岩内容不太当时是13%时，我们使用高射炮公式。低抵抗力水库的好记载评估方法被被渗透，孔，毛孔结构的系数和页岩建立的无法缩减的水浸透公式改进了记载方法的内容，烃水库识别图表，和非抵抗力(重复形成测试(RFT)；模块化的动态测试(MDT)，等等)。为记载综合解释的井的这安排的巧合率在井块DX12是82.6%。它是为低抵抗力井木头解释的一个强大的方向。