简介：从以下两幅图中，学习如何描述物体所在的位置。

简介：Thispaperpresentsthedesignandsimulationofseveralfixed-tunedsub-harmonicmixerscoverfrequenciesfrom110GHto130GHz,215GHto235GHz,310GHto350GHz,and400GHto440GHz.Amongthem,120GHz,225GHz,330GHzsubharmonicmixersaredesignedwithflip-chippedplanarschottkydiodemountedontoasuspendedquartz-basedsubstrate,the225GHzand425GHzsubharmonicmixersareGaAsmembraneintegrated,andthe115GHzsubharmonicmixerhasbeenfabricatedandtestedalready.

简介：Ｇｏｌｄ　Ｒｏｏｆｓ　Ｓｈｉｎｅ　Ａｂｏｖｅ　ｔｈｅ　Ｐｏｔａｌａ　ＰａｌａｃｅＧｏｌｄＲｏｏｆｓＳｈｉｎｅＡｂｏｖｅｔｈｅＰｏｔａｌａＰａｌａｃｅ￥ｂｙＣｅｒｉｎｇＰｕｎｃｏｇＩｎｔｈｅｌａｓｔｆｉｖｅｙｅａｒｓ，ｔｈｅｈａｒｄｅｓｔｔａｓｋｗａｓ...

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简介：【典型考例】1．It’Squitemewhysuchthingshavebeenallowedtohappen．（2006安徽）

简介：在桌面上。指摊牌、和盘托出、公诸于众或坦诚相见，比喻不做小动作或不搞阴谋诡计，与汉语成语“光明正大”或“襟怀坦白”相似。

简介：Numericalinvestigationonthedynamicmechanismhasbeenmadeforanalbatrosstoflyeffectivelynearseasurface.Emphasizingontheeffectoftheseawave,thealbatrossissimplifiedasatwo-dimensionalairfoilandthepanelmethodbasedonthepotentialflowtheoryisemployedtocalculatethewaveeffectontheaerodynamicforces.Thenumericalresultshavebeenpresentedforthestatesofflyingatdifferentconstantspeedswithconstantheightsabovesealevel,andflyingatdifferentconstantspeedswiththecombinedoscillationsofpitchingandfreeheaving.Itisshownthatthealbatrossflightefficiencydependsonnotonlythespeedandheightofflightbutalsothewaveamplitudeandthewavelength.Thealbatrossbenefitsbywaveeffecttogetthrust,soastoreducetheresistanceinthecircumstancesofroughsea.

简介：WoodsfromKoreanLarch,ChineseFir,Aspens,Manchumian,andFortunesPaulowniawerechosenforinvestigation.Specimenscutfromtheair-driedwoodshadacubicshapewithnominalair-driedsizeof17.0mmand8.5mm.Oven-diedspecimenswereputincontainersfilledwithwaterandwatersorptionwasimplementedatatmosphericpressureandroomtemperature.ResultsfromtheexperimentcouldnotdescribedexactlybythemodelofsteadystateflowfromDarcy'law.Anempiricalequationisputforwardfo...

简介：Weinvestigatethetargetandintensitydependenceofplateauinhigh-orderabovethresholdionization(HATI)bysimulatingthetwo-dimensional(2D)momentumdistributionsandtheenergyspectraofphotoelectronsinHATIofraregasatomsthroughusingthequantitativerescatteringmodel.Thesimulatedresultsarecomparedwiththeexistingexperimentalmeasurements.ItisfoundthattheslopeoftheplateauintheHATIphotoelectronenergyspectrumhighlydependsonthestructureofelasticscatteringdifferentialcrosssection(DCS)oflaser-inducedreturningelectronwithitsparention.Theinvestigationsofthelong-andshort-rangepotentialeffectsintheDCSsrevealthattheshort-rangepotential,whichreflectsthestructureofthetarget,playsanessentialroleingeneratingtheHATIphotoelectronspectra.

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简介：<正>WhenreportingtheprevalenceofchildhoodobesityintheUSAafewyearsago,themagazineU.S.News&WorldReportstated:"...some17percentofkidsarenowobese,whichmeansthey’reatorabovethe95thpercentileforweightinrelationtoheightfortheirage;anadditional17percentareoverweight,oratoroverthe85thpercentile."Anyonewithsomebasictraininginmeasurementorstatisticswillrealizethatthisstatementisincorrect.Thisisbecausethepercentileisdefinedasthevaluebelowwhichacertainpercentofobservationsfallinapopulation.Forexample,the15th

简介：Ithasbeensuggestedthathydrogen-richsystemsathighpressuremayexhibitnotablyhighsuper-conductingtransitiontemperatures.Oneofthemoreinterestingtheoreticalpredictionswasthathydrogensulfidecanbemetallizedandthehigh-temperaturesuperconductingstatecanbeinduced.Arecordcriticaltemperature（203K）waslaterconfirmedforH3Sinanexperiment.Inthispaper,weinvestigated,withintheframeworkoftheEliashbergformalism,thepropertiesofcompressedMgH6,whichisexpectedtobeaverygoodcandidateforroom-temperaturesuperconductivity.Thisappliesparticularlytothepressurerangefrom300to400GPa,wherethetransitiontemperatureiscloseto400K.Moreover,theestimatedthermodynamicpropertiesandtheresultingdimensionlessratiosexceedthepredictionsoftheBardeen-Cooper-Schrieffertheory.Thisbehaviorisattributedtothestrongelectron-phononcouplingandretardationeffectsexistinginhydrogen-dominatedmaterialsunderhighpressure.

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简介：Heatcontentoftheupperlayerabovethe20℃isotherminthetropicalPacificOceanisestimatedbyusingtheseatemperaturedatasetwitharesolution2°latitude×5°longitude(1980～1993)forthewaterdepths(every10m)from0mto400m,anditstemporalandspatialvariabilitiesareanalyzed.(1)ThetemporalvariabilityindicatesthatthetotalheatintheupperlayeroftheequatorialPacificOceanischaracterizedbytheinterannualvariability.Thetimeseriesoftheequatorialheatanomaly5monthsleadthatoftheElNinoindexatthebestpositivelagcorrelationbetweenthetwo,andtheformer13monthslagbehindthelatterattheirbestnegativelagcorrelation.ThereforetheequatorialheatcontentcanbeusedasabetterpredictorthantheElNinoindexforawarmorcoldevent.Inaddition,itisalsofoundthatlessheatanomalyintheequatorcorrespondstothestrongerwarmeventsintheperiod(1980～1993)andmuchmoreheatwasaccumulatedinthe4yearsincluding1992/1993ENSO(1989～1993)thanthe4yearsincluding1982/1983ENSO(1980～1983);(2)Thespatialvariabilityindicatesthattheareawiththehighestlagcorrelationamongthegridsmovesinananti-clockwisecircleinthenortherntropicalPacificOceanwithin4yearsperiodandinaclockwisecircleinthesoutherntropicalPacificOcean.Thisresultprovidesscientificevidenceforthequasi-cycletheoryofElNinoevents.

简介：Themeasurementoflow-fieldsusceptibilityXasafunctionoftemperatureTforLa2/3Ca1/3MnO3showsasignificantdownturnin1/X(T)abovetheCurietemperatureTc,abehaviourgenerallyobservedinperovskitemanganites.Suchadownturnisarguedtobeduetothesegregationofferromagneticclusterswithlargerspinsintheparamagneticmatrix.Basedonthisconsideration,aphenomenologicalexpressionforX(T)isproposed,inwhichthetotalsusceptibilityisassumedtobeasumoftwosusceptibilitiesarisingfrommagneticentitiesinthePMbackgroundandtheFMclusterswithT-dependenteffectivespins,respectively.TheresultisingoodagreementwiththeexperimentaldataobtainedinLa2/3Ca1/3MnO3.

简介：Thetriangulationofredspriteswasobtained,basedonconcurrentobservationsoveramesoscaleconvectivesystem(MCS)inNorthChinafromtwostationsseparatedbyabout450km.Inaddition,broadbandsfericsfromthesprite-producinglightningweremeasuredatfivegroundstations,makingitpossibletolocateandidentifytheindividualcausativelightningdischargesfordifferentelementsinthisdancingspriteevent.TheresultsofouranalysesindicatethatthespriteswereproducedabovethetrailingstratiformregionoftheMCS,andtheirparentstrokeswerelocatedmainlyintheperipheralareaofthestratiform.Thelateraloffsetbetweenspritesandcausativestrokesrangesfromafewkmtomorethan50km.Inaparticularlybrightsprite,withadistincthalofeatureandstreamersdescendingdowntoanaltitudeofapproximately48km,thespritecurrentsignalidentifiedintheelectricsferic,measuredatarangeofabout1,110km,peakedatapproximately1msafterthereturnstroke.

简介：在低温度(400°C)，化学蒸汽免职(CVD)被采用使共同做的ZnOnanocantilever数组(NA)像梳子。同样综合的共同做的ZnONA的磁化曲线显示above-room-temperature强磁性(ARTFM)的存在(居里温度，Tc>300K)而未做，ZnONA不做。相应铁磁性的来源机制被讨论，在哪个缺点由于强壮的绿轻排放起一个重要作用。

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