简介:在新课改的背景下,翻转课堂成为教学的新形式,要求学生在内容学习的基础上进行知识的理解和运用。本课主题为'Conflict',通过课前的微课视频学习,学生已经学习了'冲突'相关背景知识和相关词汇。在课堂上,教师设计一系列的听说训练活动,帮助学生巩固目标词汇的理解和运用;并创设情境,让学生在语境中判断说话者的态度,提炼出解决冲突的方法,提升学生的英语听说能力。
简介:ByTangCaifuForestsaretherichestrenewableplantresourcesandembraceeconomic,ecologicalandsocialbenefits.Variousconflictsandcontradictionsariseinexpandingtheutilizationofforestresources.AparticipatoryevaluationmethodwasusedtoinvestigateconflictsinforestresourcesutilizationinLongweiandLinwanVillages.Thes
简介:Givennpropositionalvariables,letKn(i,j),0≤i≤j≤n,betheset(ordisjunction)ofallconjunctionsofiliteralsofwhichexactlyjliteralsarenegative.DunhamandWangconjecturedthatitmayrequireexponentialtimetodecidethateverydisjunctionKn(i,j)isnotvalidbytheresolutionmetho.Thispapergivesaproofoftheconjectureandthenexhibitsanewcounterexampletothefeasibilityoftheresolutionorconsensusmethod.
简介:Thispaperattemptstoregardspatialrelationtransformationasanimportantprocessinmapgener-alization.Thespatialrelationgenerali-zationcanbedividedintothecompo-nentsofabstraction:topology,dis-tanceandorientation.Theconcept‘spatialrelationresolution'isintro-ducedtodescribetheconstraintsofrelativespatialrelation.Onthebasisofnineintersectionmodels,thecardi-naldirectionmodelsandtheiso-dis-tance-relationmodels,thispapergivesthreesortsofrelationresolutionrepre-sentationsfortopological,distanceandorientationrelation,respectively.Twomappingimplementationsinmapgen-eralizationisdiscussed.
简介:Thispaperpresentsthebasicconceptsandprinciples,datastructureandhighefficientspatialindexformulti-resolutionimagedatabase.Thedatabaseischaracterizedbyarrangementofmulti-resourceimagedataandseamlessmosaic,distribution-basedstorageandmanagement,integrationwithotherspatialdatabasesoftwaresuchasGeoStarandGeoGriddevelopedbyWuhanTechnicalUniversityofSurveyingandMapping.
简介:在用有不同积云parameterization计划和决定的AGCM的六集成的Madden-Julian摆动(MJO)被检验在MJOsimulation.Results上调查他们的影响建议MJO模拟能被分辨率和积云parameterization影响,尽管后者,它在模仿MJO和模仿的MJO的特征决定AGCM的基本能力,比前者更关键。模型分辨率能实质地在某些方面影响模仿的MJO。增加的分辨率不能实质地改进模仿的MJO,但是能显著地调制模仿的MJO的详细特性;同时,分辨率的影响依赖于积云parameterization,决定MJO的基本特征。在决定的变化不改变模仿的MJO的性质,但是相当自己调整模拟,它被积云parameterization计划抑制。Theretbre,垂直决定需要同时被增加。加热的diabatic的垂直侧面可以是为这些不同建模结果负责的一个关键因素。到大程度,它被使用的积云parameterization计划决定。
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简介:我们开发基于E5071B向量网络分析器(VNA)渗透雷达系统(LANRCS-GPR)的高分辨率地面。这个系统利用一条宽带和渗透雷达系统的可调节的频率领域地面并且与极端宽带、高的精确测量增加一个网络分析器的特征。并置减少构造费用并且使系统容易膨胀的系统控制采用LAN模式。渗透雷达系统的高分辨率地面与高计算效率用F-K移植执行实时成像。系统的实验结果显示LANRCS-GPR系统高提供分辨率和精确,高signal-to-noise比率,和大动态范围。而且,LANRCSGPR系统灵活、可靠操作与对容易扩展系统函数。LANRCS-GPR的研究和开发为渗透雷达生产的未来频率域地面提供理论、试验性的基础并且能也与为电磁波研究和电磁的探索收集精确,庞大的信息能力,宽应用程序,和方便操作的高数据用作一个试验性的平台
简介:ThereolutioncharacteristicofGaAs/GaAlAstrransmissionphotocathodeisanimportantparameterinthirdgenerationintensifiers.ThemodulationtransferfunctionofGaAs/GaAlAstransmissionphotocathodeisderivedfromasimpletwo-dimensionaldiffusionequation.Thetheoreticalresolutioncharacteristicofa2μmthickGaAs/GaAlAstransmissionphotocathodeiscalculated.TherelationshipbetweenresolutionandparametersinGaAs/GaAlAstransmissionphotocathodeisdiscussed.AconclusionisshownthatonecandesigntheGaAs/GaAlAstransmissionphotocathodeformaximumquantumefficiency,sincethesacrificeintheresolutiondoesn'tlimitsystemperformances.
简介:TheambiguityresolutioninthefieldofGPSisinvestigatedindetail.Anewalgorithmtoresolvetheambiguityisproposed.Thealgorithmfirstobtainsthefloatingresolutionoftheambiguityaidedwithtripledifferencemeasurement.Decorrelationofsearchingspaceisdonebyreducingtheambiguitycovariancematrix'sdimensiontoovercomethepossiblesickfactorizationofthematrixbroughtbyZ-transformation.Insimulation,theproposedalgorithmiscomparedwithleast-squaresambiguitydecorrelationadjustment(LAMBDA).TheresultshowsthattheproposedalgorithmisbetterthanLAMBDAbecauseoflesserresolvingtime,whichapproximatelyreduces20%resolvingtime.Thus,theproposedalgorithmadaptstothehighdynamicreal-timeapplications.
简介:Long-termintegrationsareconductedusingtheSpectralAtmosphericModel(referredtoasSAMIL),whichwasdevelopedintheLaboratoryforNumericalModelingforAtmosphericSciencesandGeophysicalFluidDynamics(LASG)intheInstituteofAtmosphericPhysics(IAP),withdifferentresolutionstoinves-tigatesensitivityoftheMadden-JulianOscillation(MJO)simulationstothemodel'sresolution(horizontalandvertical).Threeresolutionsofthemodel,R15L9,R42L9andR42L26,withidenticalphysicalprocesses,allproducedthebasicobservedfeaturesoftheMJO,includingthespatiotemporalspace-timespectraandeastwardpropagation.Nofundamentaldifferencesamongthesesimulationswerefound.ThisindicatesthatthemodelresolutionisnotadeterminingfactorforsimulatingtheMJO.Detaileddifferencesamongthesemodelingresultssuggest,however,thatmodelresolutioncansubstantiallyaffectthesimulatedMJOincertainaspects.Forinstance,atalowerhorizontalresolution,highfrequencydisturbanceswereweakerandthestructuresofthesimulatedMJOwerebetterdefinedtoacertainextent.AhigherverticalresolutionledtoamorerealisticspatiotemporalspectrumandspatialdistributionofMJOprecipitation.Meanwhile,increasingthemodel'sresolutionimprovedsimulationoftheclimatology.However,increasingtheresolutionshouldbebasedonimprovingthecumulusparameterizationscheme.
简介:Anovelsimply-structuredhybridsmartantennasystemsuitabletobeusedinad-hocnetworkterminalsisproposedinthisletter.Thesuper-resolutionbeamformingalgorithmisalsopre-sentedbasedonthesystemusingDOAestimationresults.Thealgorithmcanswitchthebeamformingtothedirectionoftheexpectedsignalandgetthebesttransmittingperformanceafterthepre-beamformingoftheButlermatrix.TheshiftingvalueformulasarepresentedtoobtainthebestSNRwhenthereisnointerferingsignalandtoacquirethehighestSignaltoInterferenceRatio(SIR)asthereisoneinterferingsignal.Whentherearemorethanoneinterferingsignals,thepre-beamformingfeatureoftheButlermatrixcanalsosuppresstheinterferingsignals.Simulationresultsverifiedthealgorithm.
简介:Forthepurposeofachievinghigh-resolutionoptimalsolutionsthispaperproposesanodaldesignvariablebasedadaptivemethodfortopologyoptimizationofcontinuumstructures.Theanalysismesh-independentdensityfield,interpolatedbythenodaldesignvariablesatagivensetofdensitypoints,isadaptivelyrefined/coarsenedaccordingtoacriterionregardingthegray-scalemeasureoflocalregions.Newdensitypointsareaddedintothegrayregionsandredundantonesareremovedfromtheregionsoccupiedbypurelysolid/voidphasesfordecreasingthenumberofdesignvariables.Apenalizationfactoradaptivitytechniqueisemployedtopreventprematureconvergenceoftheoptimizationiterations.Suchanadaptiveschemenotonlyimprovesthestructuralboundarydescriptionquality,butalsoallowsforsufficientfurthertopologicalevolutionofthestructurallayoutinhigheradaptivitylevelsandthusessentiallyenableshigh-resolutionsolutions.Moreover,comparedwiththecasewithuniformlyandfinelydistributeddensitypoints,theproposedadaptivemethodcanachieveahighernumericalefficiencyoftheoptimizationprocess.
简介:Wepresentadigitalholographicmicroscopewhereinthesampleisilluminatedbystructuredlighttoenablethecaptureofadditionalobjectspatialfrequencies.ReconstructedimageswithincreasedspatialresolutionareobtainedbyseparatingandsynthesizingbandwidthsofdifferentfrequencyregionsintheFourierdomain.Thetheoreticalanalysisandexperimentalresultsarepresented.
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简介:Inthispaper,wecalculatetheresolutionofaphotorefractiveincoherent-to-coherentopticalconverterontheimageplaneforsmalldiffractionefficiencybytakingintoaccounttheopticalimagingcharacteristicsoftheimaginglens.Forathingrating,weobtainahighresolution,whichiscomparablewiththeexperimentalresults.
简介:Thepoorresolutionofconventionalseismicdatacouldnotfititforreservoirdescription.Meanwhileonlyseismicdatacouldprovide3-Dinformationofreservoir,itisveryimportanttoimproveresolutionofseismicdata.Hereamethodisputforward,byusinginversiontechniques,toimprovetheseismicdatawiththequalityofhigherresolutionandlowernoise.Thespecificcharacterofthismethodistheusageofgeologicrulesinprocessingseismicdata,whichisquitedifferentfromthehypothesisofsomedeconvolution.Therearealwayssomeassumptionsaboutwaveletorreflectseriesinconventionaldeconvolutionisnotappropriate.Applicationofthismethodonseismicdatafromseveraloilfieldsshowitseffectiveneseandefficency.