简介：TheevaluationofcreepdamagesofCr-Mo-Vsteelusedinthegasturbineofpowerplanthasbeencarriedoutusingtheline-focus-beam(LFB)acousticmicroscopy.Thevelocityofleakysurfaceacousticwave(LSAW)propagatednearthespecimensurfacewasusedforthequantitativeevaluations,whichwasmeasuredbyLFBacousticmicroscopyusingthev(z)curveanalysismethod.IthasbeenshownthatwiththeincreaseofcreepdamagefractionofmetalmaterialtheLSAWvelocitydecreasesobviously,whichsuggeststhepossibilityofnondestructiveandquantitativeevaluationsofcreeddamagesinmetalmaterialsbyacousticmicroscopy.

简介：WeconstructaclassofintegrablegeneralizationofTodamechanicswithlong-rangeinteractions.ThesesystemsareassociatedwiththeloopalgebrasL(Cr)andL(Dr)inthesensethattheirLaxmatricescanberealizedintermsofthec=0representationsoftheaffineLiealgebrasCr(1)andDr(1)andtheinteractionspatterninvolvedbearsthetypicalcharactersofthecorrespondingrootsystems.WepresenttheequationsofmotionandtheHamiltonianstructure.Thesegeneralizedsystemscanbeidentifiedunambiguouslybyspecifyingtheunderlyingloopalgebratogetherwithanorderedpairofintegers(n,m).Itturnsoutthatdifferentsystemsassociatedwiththesameunderlyingloopalgebrabutwithdifferentpairsofintegers(n1,m1)and(n2,m2)withn2＜n1andm2＜m1canberelatedbyanestedHamiltonianreductionprocedure.Forallnontrivialgeneralizations,theextracoordinatesbesidesthestandardTodavariablesarePoissonnon-commute,andwheneithernorm≥3,thePoissonstructurefortheextracoordinatevariablesbecomessomeLiealgebra(i.e.theextravariablesappearlinearlyontheright-handsideofthePoissonbrackets).Inthequantumcase,suchgeneralizationswillbecomesystemswithnoncommutativevariableswithoutspoilingtheintegrability.

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简介：Therearemoreandmorecountriestoakeanefforttothestudiesofvanadiumalloyforfusionapplication.NIFSinJapanhasrecentlydevelopedan80kgheatV4Cr4Tialloy(NIFS-heat2)aftertheproductionofa500kgscaleV4Cr4TiinU.S.severalyearsago.PropertyevaluationofthealloyhasbeenputintoaninternationalcollaborationprogramunderthecoordinationofIEA(InternationalEnergyAgency).SWIPhasjoinedthecollabrationonthehydrogenembrittlementresistanceevaluationofthealloyt.

简介：钨基合金由于具有高密度、高强度及高冲击韧性等优异性能而得到广泛应用。它在军事工业中主要用作穿甲弹、动能弹和导弹弹头。我单位对高密度钨基合金材料的研究已有多年历史，重点研究了添加Co，Mn，Cr等元素对钨基合金性能的影响，并研制出一系列密度和力学性能的钨基合金。

简介：OnaccountoftheexcellentmechanicalpropertiesofCrNfilmsuchasgoodwearandcorrosionresistance,andoxidizationatamuchhighertemperature,CrNfilmhasbeendemonstratedasoneofthebestcoatingsforenlargingthebearingatpresent.However,steelworkinglifespanatpresentt.However,withthemoreincreasinglyaggressiveoftheworkingenvironmentofmechanicalcomponents,especiallyforbearingsteel,newcoatingtechnologieswithamorebetterpropertiesofthetreatedpartssuchaswearandcorrosionresistancearerequired.

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简介：采用环境氢脆技术及现代材料微观分析技术，研究了Fe-35Ni-15Cr实验合金在室温至900℃的力学性能及热充氢后在室温及750℃的力学性能，分析了温度对材料微观组织的影响，为优化其化学成分、热处理工艺等提供技术依据。

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简介：Twoseriesofmixedoxides,CoAlMandMgAlM(M=Cr,Mn,Fe,Co,Ni,Cu),werepreparedbycalciningtheircorrespondinghydrotalcite-likecompounds(HTLc).TheratioofMg:Al:M(orCo:Al:M)was3:1:1.ThecatalyticactivityofallsamplesforthereactionofNO+COwasinvestigated.TheresultsshowedthattheactivityofCoAlMwasmuchhigherthanthatofMgAlM.ThestructureandthepropertyofredoxwerecharacterizedbyXRDandH2-TPR.TheresultsindicatedthatonlyMgOphasewasobservedaftercalciningMgAlMhydrotalcites,andthetransitionmetalsbecamemorestable.Thespinel-likephaseappearedinallofCoAlMsamplesafterthecalcination,andthetransitionmetalswerechangedtobemoreactive,andeasilyreduced.TheactivitiesofthreeseriesofmixedoxidesCoAlCuobtainedfromdifferentpreparationmethods,differentratioofCo:Al:Cuandatdifferentcalcinationtemperatures,werestudiedindetailforproposingthemechanismofreaction.TheabilityofadsorptionofNOandCO

简介：TQ171.68497010634超精密光学抛光研究的进展及其发展趋势=Developmentandfeatureofultraprecisionopticalpolishing[刊,中]/滕霖,任敬心(西北工业大学.陕西,西安(710072))∥航空精密制造技术.—1996,32(3).—5—9综述了对精密光学抛光影响精度和质量的因素,对重要因素目前的研究进展进行了分析;介绍了新型

简介：TJ7652002032313水下航行器终端姿态约束的制导方法研究=Investigationonaguidingmethodofperpendicularimpactforthenavigationofaunderwaterautonomousvehicle[刊,中]/刘正平,徐德民,王晓娟(西北工业大学.陕西,西安(710072))//系统工程与电子技术.-2001,23(11).-70-72,86针对水下航行器采用主视声纳和旁视声纳识别和跟踪,引入了初始导引段跟踪虚拟目标的概念,提出一种新的精确制导方法,给出了导引跟踪数学模型,并进行了仿真和分析。图6参4(李瑞琴)TJ7652002032314光纤制导双向传输系统=Bidirectionalopticalfiber

简介：对某型空地导弹电视导引头进行实测建模,通过建模和仿真分析,对系统提出改进意见。介绍了光纤图像制导系统的技术特点和基本原理,讨论了光纤图像制导的关键技术,如图像导引头、光纤双向传输系统、图像跟踪器等,给出了光纤制导系统应用的实例及试验结果,分析了其应用方向和发展前景。

简介：O72395021325磨抛工艺中HgCdTe晶片的表面损伤=SurfacedamageofHgCdTewafersinlappingandpolishing[刊,中]/姚英,蔡毅,欧明娣,梁宏林,朱惜辰(昆明物理所.云南,昆明(650223))//红外技术.—1994,16(5).—15—20用X射线反射形貌术研究了磨抛工艺在用Te溶剂法和布里奇曼法生长的碲镉汞晶片表面引入的

简介：TB853.196031855镜头快门及其技术发展=Thelensshutteranditstechnicaldevelopment[刊,中]/范建伟(国营华东光学仪器厂.浙江,嘉兴(314001))//光学仪器.-1995,17(4/5).-75根据不同时期镜头快门曝光控制方式,动力源的

简介：TB8598063903利用胶片反射光的直接测光系统及其分析计算=Lightdirectmeasuringsystemusingfilmreflectedenergyanditsanalysis[刊,中]/冯华君(浙江大学光学仪器国家重点实验室.浙江,杭州(310027))//光学仪器.—1997,19(6).—24—30

简介：TH949.296031901形心测量跟踪电视系统=CentroidmeasurementandtrackingTVsystem[刊,中]/于前洋,黄廉卿,刘洵,张渤琳,刘丽琴(中科院长春光机所.吉林,长春(130022))//光学精密工程.-1995,3(5).-38-43论述了形心测量跟踪电视系统的构成、工作原理、关键技术及实用结果。图4表2参3(任延同)TN141.3396031902谈谈黑白显像管的光栅暗角=SuperficialviewonthegratingdarkcornerofB/Wpicturetubes[刊,中]/李臻峰(华东电子管厂.江苏,南京(210028))//光电技术.-1995,36(3).-48-51

简介：TN2495063683超短脉冲激光的脉宽测量=Measurementoftheultrashortlaserpulsewidth[刊,中]/文国庆,张树葵,周丕璋,陈骥,邬玉婷(西南核物理与化学研究

简介：O43196021318金属基和涂层光学常数的测量=Measurementsofopticalconstantsformetalsandpaint[刊,中]/韩香娥,戚力彦,吴振森(西安电子科技大学物理系。陕西,西安(710071))∥光子学报。—1995,24(Z2)。—17—22采用椭偏法在λ=0.63μm波段测量了合金铝,

简介：TN2596042537Brillouin光纤应变传感中的参数理论计算=TheoreticalcalculationoftheparametersinBrillouinfibrestrainsensing[刊,中]/黄民双,陈伟民,黄尚廉(重庆大学光电技术及系统开放实验室.四川,重庆(630044)),王新强(重庆大学物理系.四川,重庆)∥光通信技术.—1996,20(1).—39—44,53