简介：通过在西交利物浦大学的观察和教学实践，对于中西教学理念以及教学效果做了初步比较，简单介绍了西交利物浦大学数学基础课程教学的实况和对于某些问题的思考．

简介：数据分析与管理建模是哈尔滨工业大学信息管理与信息系统专业根据就业市场需求所设立的一门新课．本课程以研究型教学模式为导向，选择数据挖掘中的经典分析方法作为教学内容，根据本课程的特点，采用二元教学模式，即知识导向与能力导向相结合、平等参与与权威控制相结合，将合作性学习贯穿整个教学过程之中，同时，考评体系采用了学科竞赛参与模式．于2010年春季学期进行的第一轮教学实践表明：本课程的教学设计合理、教学效果良好，从而为本科教学改革提供了一个可以借鉴的新案例．

简介：Someopticalprobesbasedonlightextinctionhavebeendevelopedtomeasurewetnessdominatedwithfimedropletsinsteamturbine.However,coarsewaterdroplets(hereafterreferredtoasCWD)thatarethemaincauseoferosionofbladeandofwetnesslossofsteamturbinecan'tbedetentedbytheextinctionprobesbecauseofitslargesize.Inthispaper,anewmethod-thelightfluctuationmethodispresentedthatiscapableofmeasuringthesizeofCWD.AnewprobebasedonthismethodwasdevelopedformeasuringthesizeofCWDaswellasitsvelocityandconcentration.

简介：Inthispapertheeffectsofthecondenserdesignparameters(suchasturbineinletcondition.turbinepowerandcondenserpressure)onheattransferarea,coolingwaterflow-rate.condensercostandspecificenergygenerationcostarestudiedforsurfacetypecondenser.Theresultsaregiveninthetextandalsoshownasdiagrams.

简介：

简介：Inthispaper,animprovementofheatingmethodformeasuringwetnessoftheflowingwetsteamisdeveloped,thebasicprincipleoftheheatingmethodispresentedandthemathematicalmodelhasbeenbuiltforanalyzingthethermodynamicsproblemsduringtheprocessofheating,Moreover,aninstrumentformeasuringwetnessofwetsteamflowwasdesignedandmadeout.ThisinstumenthasbeenusedformeasuringwetnessofthewetsteamflowattheoutletofthenozzleriginThermalTurbineLaboratory,Xi'anJiaotongUniversity,Byanalyzingtherelativeerroroftheresult,itwasfoundthatthisinstrumenthasfairlyhighaccuracy,itcanbeusedastheprototypeofpracticalinstrumentandhasanimportantapplicablevalueinengineering.

简介：Graphitedusthasanimportanteffectonthesafetyofhigh-temperaturegas-cooledreactors(HTR).Theflowfieldinthesteamgeneratorwasstudiedbythecomputationalfluiddynamics(CFD)method,withtheresultsindicatingthatthefrictionvelocityinthewindwardandtheleewardoftheheattransfertubesisrelativelylowandishigheratthesides.Furtheranalysisoftheresuspensionofgraphitedustindicatesthattheresuspensionfractionreachesnearlyzeroforparticleswithadiameterlessthan1μm,whereasitwillincreasesastheheliumvelocityinthesteamgeneratorincreasesforparticlesizelargerthan1μm.Moreover,theresuspensionfractionincreasesastheparticlesizeincreases.Theresultsalsoindicatethatresuspensionoftheparticleswithsizeslargerthan1μmexhibitedobviousdifferencesindifferentpartsofthesteamgenerator.

简介：部分数学教师通常会把“主导”误当成“主宰”.他们好为人师,习惯于灌输、训导式教学,不自觉地把持着课堂认知进程.为此,教学主张在课堂中推行实施“让学”的教学行为方式,引导教师让出“教”的时间、组织和讲台;帮助学生掌握自学标注、提问求教、使用工具等“让学”的学习方法.以实现教师教学观念的转变及教学行为的自我改造,从而有效提升学生个体的学习能力和数学素养.

简介：本文是以一节数学课的教学设计为例,谈了精准化教学理念下数学课堂教学活动设计的基本步骤.借助了移动智能终端及时反馈和数据分析的功能,笔者在文章中就教学起点的选择、教学重难点的把握、探究性问题的设置以及个性化补偿教学方面所采用方法和策略做了描述,也对于精准教学在数学课堂教学中的实施做了反思和展望.

简介：Anewdual-fluidmodelconsideringphasetransitionandvelocityslipwasproposedinthispaperandtheCunninghamcorrectionwasusedinthedropletresistancecalculation.Thisdual-fluidmodelwasappliedtothenumericalsimulationsofwetsteamflowina2DLAVALnozzleandintheWhitecascaderespectively.Theresultsoftwosimulationsdemonstratethatthemodelisreliable.Meanwhile,thespontaneouscondensingflowinWhitecascadewasanalyzedanditinfersthattheirreversiblelosscausedbycondensationaccountsforthelargestshare(about8.78%ofinlettotalpressure)intotalpressurelosswhilethelosscausedbyvelocitysliptakesthesmallestshare(nearly0.42%),andanotherpartoftotalpressurelosscausedbypneumaticfactorscontributesalesssharethancondensation,i.e.almost3.95%ofinlettotalpressure.

简介：O432.32001020770反光材料的色度学性能研究=Studyofthecolorimetriccharacteristicsofretroreflectivemateri-als[刊,中]/王智和,王涪新,单明正,曾灵华,任静(北京航空材料研究院.北京(100095))//光学技术.-2000,26(2).-118-119,122讨论了反光材料的光度学特性,并在此基础上讨论了反光材料的色度性能,分析了不同测试方法的优缺点

简介：O432.396020715微机辅助光学配色的一种C语言实现方法=ThenewmethodforcolorintegrationwithCADtechnique[刊,中]/柏永林(陕西教育学院。陕西,西安(710054)),王冰,曲小平(西北大学。陕西,西安

简介：O432.397020717归一化偏差本体反射特征的研究=Studyofnormalizeddeviationbodyreflection[刊,中]/刘立峰,徐光祜(清华大学计算机科学与技术系.北京(100084))//光学学报.-1996,16(4).-556-562利用双色反射模型和有限维线性模型,提取归一化偏差本体反射特征,被实验证明是实现颜色恒常性的一个重要途径。详细阐述了归一化偏差本体反射特征的特性,其计算方法,应用的前提条件,以及应用限制,并在实际图像处理中,考虑到了这些影响的因素。图6表2参7(严寒)

简介：O734.298010602各向异性介质中的菲涅耳公式及应用=Fresnelformulasforanisotropicmediumandapplication[刊,中]/李国华,杨连臣(曲阜师范大学激光研究所.山东,曲阜(273165))//激光杂志.—1997,18(2).—48—50给出了在空气与各向异性介质分界面上反射光、折射光与入射光振幅间的关系及其在测定各向异性介质主折射率中的一个应用。图2参2(严兰)

简介：Anexperimentalstudyofheattransfercharacteristicsinsuperheatedsteamcooledrectangularchannelswithparallelribswasconducted.Thedistributionoftheheattransfercoefficientontherib-roughedchannelwasmeasuredbyIRcamera.Theblockageratio(e/Dh)ofthetestedchannelis0.078andtheaspectratio(W/H)isfixedat3.0.Influencesoftheribpitch-to-heightratio(P/e)andtheribangleonheattransferforsteamcoolingwereinvestigated.Inthispaper,theReynoldsnumber(Re)forsteamrangesfrom3070to14800,theribpitch-to-heightratioswere8,10and12,andribangleswere90°,75°,60°,and45°.Basedonresultsabove,wehaveconcludedthat:Incaseofchannelswith90°tranverseribs,forlargerribpitchmodels(theribpitch-to-heightratio=10and12),areaswithlowheattransfercoefficientinfrontofribislargeranditsminimumislower,whilethepositionoftheregionwithhighheattransfercoefficientnearlyremainsthesame,butitsmaximunofheattransfercoefficientbecomeshigher.Incaseofchannelswithinclinedribs,heattransfercoefficientsonthesurfacedecreasealongthedirectionofeachribandshowanapparentnonuniformity,consequentlytheregionswithlowNusseltnumbervaluescloselyfollowingeachribexpandalongtheaforementioneddirectionandthatofrelativehighNusseltnumbervaluesvaryinversely.Forasquarechannelwith90°ribsatRe=14800,widerspacingribconfigurations(theribpitch-to-heightratio=10and12)giveanarea-averagedheattransferontherib-roughenedsurfaceabout8.4%and11.4%morethanP/e=8model,respectively;forinclinedparallelribswithdifferentribanglesatRe=14800,thearea-averagedheattransfercoefficientsof75°,60°and45°ribbedsurfacesincreaseby20.1%,42.0%and44.4%incomparisonwith90°ribanglemodel.45°anglerib-roughenedchannelleadstoamaximalaugmentationofthearea-averagedheattransfercoefficientinallresearchobjectsinthispaper.

简介：与自发的冷凝作用，试验性的确认和流动基于二阶段的湿蒸气流动嘴和2D串联上的分析被执行。3D平均Reynolds的煤气液体的二阶段的流动控制方程解答者与k被探索--kp骚乱模型。而且，3D流动蒸气汽轮机的最后舞台定子上的数字模拟被执行。结果证明片吸表面上的突然的压力上升被微滴生长主要在冷凝作用流动引起。冷凝作用位置在串联经过越向后，从冷凝作用的突然的压力上升是越少，并且越多更大成核率是，下面凉下来的最大值和微滴的数字每统一体积是。冷凝作用波浪和冲击波的相互作用在片串联插头的参数上强加了更大的影响。

简介：O43794021118非线性光学产生VUV/XUV相干辐射的发展和研究=ThedevelopmentofthegenerationofcoherentVUV/XUVradiationbynonlinearopticalprocess[刊,中]/孙騊享,田测产(北京大学物理系)//激光杂志.-1993,14(3).-113～122对近来非线性光学效应产生VUV/XUV相干辐射的理论和实验进展进行了概括和总结,阐述了各种产生VUV/XUV相干辐射的方法,如金属蒸汽中的双光子共振四波混频,惰性气体中的非共振和共振四波混频以及强激光场下的高次谐波过程等,

简介：TN2596063743非线性轴向不均匀自聚焦光纤轴对称场的变分解=Variationalsolutionsofaxisymmetricalfieldinanonlinearlongitudinallyinhomogeneousself-focusingfiber[刊,中]/洪德明,陈智浩(福建师范大学物理系.福建,福州(350007))//电子科学学刊.-1995,17(4).-430-433用变分法求出了非线性轴向不均匀自聚焦光纤轴对称场的解析解。对于线性情形,变分解与其它文献的结果相同。参10(严寒)

简介：O48496042583快速热氮化SiO_xNg薄介质膜的电荷特性与光学性质=ChargecharacteristicsandopticalpropertiesofrapidthermalnitrideSiO_xNythindielectricfilm[刊,中]/陈蒲生,岑洁儒(华南理工大学应用物理系.广东,广州(510641)),董长江(中科院表面物理实验室.北京(100080))∥半导体学报.—

简介：O484.497063836聚酰亚胺LB膜上液晶表面锚定的研究=Studyofsurfaceanthoringofliquidcrystalsonpoly-imideLBfilms[刊,中]/孙睿鹏,郭建新,王宗凯,马凯,黄锡珉(中科院长春物理所.吉林,长春(130021))∥物理学报.—1996,45(12).—2041—2046通过测试光延迟研究了聚酰亚胺LB膜的光学各向异性,分析了在LB膜成膜过程中成膜分子的流动取