简介：<正>平面直角坐标系确定了平面内点的位置,使数与形结合起来,实现了运用代数方法解决几何问题,也实现了借助图形直观地探索数量关系的规律性,在数学史上具有重大的意义.因此,平面直角坐标系中确定点的位置的量--坐标,就是中考必考的内容.

简介：WesummarisetheHEPVis'01workshopheldinMay2001atNortheasternUniversity,Boston.Generalissuessuchasarchitectureanddesignoftheframeworksandtoolkitsaredescribedaswellasthestatusofawiderangeofgenericanalysisandvisualisationtoolsandexperiment-specificsystems.

简介：为有效辐射同轴高功率微波产生器的微波能量,利用径向线结构设计了一种将同轴输出结构中的微波模式TM◎01转化为圆波导中的微波模式TM○01的模式转换器,它能以较短的轴向长度实现较高的模式转换效率,满足紧凑化应用需求,且易于加工。数值模拟结果表明：该模式转换器在14.77GHz处的转换效率大于99%,在超过300MHz的频率带宽内的转换效率大于98%。

简介：ThepreparationoftwotypesofmolecularsievesAlPO4-11andMAPO-11isreported.Theparticlesizeofthelatterishundredsofmicrons,about10timeslargerthanthatoftheformer.TheXRD,IRandDTAspectrahavedemonstratedthatmagnesiumhasbeenintroducedintotheframeworkofAlPO4-11.ThesuccessfulpreparationoflargesinglecrystalofMAPO-11willopenupanewareaforthepreparationoflargemolecularsievescrystalsinthefuture.ThelargeMAPO-11crystalcompoundisapromisinghostforthehost-guestassemblyofcompositematerials.

简介：FK01isanewstrainofoil-sunflowerwithcytoplasmicmalesterilelineHAasfemaleparentandcytoplasmicmalesterilerestorerline19540asmaleparent.19540isamutantirradiatedbycarbonionwhichseedoilcontentincreases.FK01joined2014Gansuprovinceregionaltestofoil-sunflowerandplantedinsixsites:Jingyuanagriculturaltechniquespreadingcenter,Minqinagriculturaltechniquespreadingcenter,Jingtaiagriculturaltechniquespreadingcenter,Jiuquanagriculturalsciencesresearchinstitute,Tianshuiagriculturalsciencesresearchinstitute,andHuanxianseedcontrolstation.

简介：2006年8月，“ICPE2006国际物理教育大会”在日本东京召开，东南大学恽瑛教授在会议上作题为《通过双语物理教学培养大学一年级学生的创新能力》的报告，恽瑛教授带领的2005级本科生李鑫、杜源、胡特、姜坤也分别作了口头报告和张贴报告。他们在会议上的精彩发言与会议期间的表现，引起了与会代表和著名的《Science》杂志的极大兴趣。

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简介：著名数学家陈景润英年早逝，1996年3月19日病故，终年63岁．这对于一个有建树的科学家来说，实在是太短暂了……。

简介：134Csabranchingpointins-processpathwhichisshowninFig.1.Thebranchingratioisdefinedasfβ=λβ/(λβ+λn).Itcouldbededucedfromtheabundanceof134Baand136Basince136Bagoesthroughbothdecayandneutroncaptureof134Cswhile134Baonlyexperiencesdecaychannel[1].Duetoboth134Baand134Baarepures-processnuclei,thisbranchingpointisagoodapproachtodeterminethes-processparameters.Withtemperaturedependentβ-decayrateof134Cs,thetemperatureofs-processcouldbededuced.

简介：InstitutionofModernPhysics(IMP)hasdesigned,fabricatedandinstalledthefirstSRFcavityelectropolishingsystemofChina.It’ssizedfor1.3GHzSRFcavities,andalsocanworksformultiplecellcavitieswithfurtherupgradeofstructure.

简介：In2014,theresearchersofTheoreticalPhysicsGroupatIMPhavecarriedouttheirresearchworkonnuclearphysics,heavyionphysicsandhadronphysics.Someimportantresultshavebeenobtained.Thethree-bodyforce(TBF)effectontheoff-shellbehavioroftheneutronandprotonmassoperatorsinasymmetricuclearmatterhasbeeninvestigatedwithintheframeworkoftheextendedBrueckner-Hartree-Fockapproach[1].Athighdensitieswellabovethenormalnuclearmatterdensity,theTBFisshowntoaffectsignificantlytheoff-shellehaviorofboththeprotonandneutronmassoperators.Thedensitydependenceofsymmetryenergyaroundtheuclearsaturationdensityhasbeenstudied[2].Anewapproachhasbeenproposedandappliedtodeterminetheymmetryenergycoefficientofheavynucleibasedontheavailableexperimentalnuclearmassesofheavynuclei.Theobtainedresultisadoptedtoanalyzethedensitydependenceofsymmetryenergyofnuclearmatteraroundtheaturationdensity.TheslopeparameteratthesaturationdensityisdeterminedtobeL=(50.515.5)MeV.

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