简介:MossbauerEffectofRapidlyQuenchedAl-Fe-V-Si-MmAlloysWangJianqiang(王建强),ChaoYuesheng(晁月盛),ZengMeiguang(曾梅光),ZhangBaojin(张宝金),Ch...
简介:Inthispaper,ageneralsolutionforthree-dimensionalstaticpiezothermoelasticprob-lemsofcrystalclass6mmsolidsispresented.Tnegeneralsolutioninvolvesfourpiezoelasticpotentialfunctionsandapiezothermoelasticpotentialfunction,ofwhichfourpiezoelasticpotentialfunctionsaregovernedbyweightedharmonicdifferentia[equations.ComparedwiththegeneralsolutiongivenbyAshidaetal.,inwhichsevenpotentialfunctionsareintroduced,thegeneralsolutionproposedinthepresentpaperismorerigorouslyderived.Moreover,ithasasimpleformandisconvenientforappli-cation.Asanillustrativeexample,theproblemofapyroelectrichalf-spacesubjectedtoaxisymmetricheatingisstudied.Numericalresultsofdisplacements,stresses,electricpotentialandelectricdisplace-mentsareobtainedforacadmiumselenidehalf-space.Thermallyinduceddisplacementsandstressdis-tributionarecomparedwiththoseobtainedforthesamematerialwithoutpiezoelectricandpyroelectriceffects.
简介:摘要:介绍了铜板带热轧机的组成。重点阐述了对国内某铜板带加工厂1500mm热轧机的换辊装置的改造方案及项目施工成果。改造后,解决了原有的换辊装置刚性不足,极大地减少了换辊时间及工人的劳动负荷,提高了生产效率。
简介:摘要:针对棒线型材厂六棒车间首次生产Φ14mm螺三切分工艺的孔型、导卫、料型确定及调试过程与顺行改造进行总结。
简介:摘 要 作为一种清洁能源,液化天然气在社会生产中开始扮演越来越重要的角色,全球范围内对其需求也在逐年增加。存储和运输液化天然气的容器须具备良好的低温韧性与焊接性能,以及较高的强度,研究表明,9%Ni钢满足相关需求。但由于9%Ni钢,尤其是超薄规格(5mm)9%Ni钢对生产工艺及流程控制的要求极高,所以目前国内能量产5mm厚9%Ni钢的企业有限。湘钢宽厚板厂经技术攻关,从计划编排、加热制度、轧制工艺等方面入手,经长期摸索实践,已具备量产超薄规格(5mm)9%Ni钢的能力。
简介:摘要目的观察0.1%他克莫司软膏治疗特应性皮炎(AD)的疗效及不良反应。方法采用多中心、双盲、随机、赋形剂平行对照的方法对150例中、重度AD患者给予0.1%他克莫司软膏治疗3周。结果0.1%他克莫司软膏组和对照组的有效率分别为87.18%和50.00%,差异有统计学意义(P<0.01)。结论0.1%他克莫司软膏治疗特应性皮炎安全、有效。
简介:【摘要】目的 : 观察用 0.1% 利凡诺溶液湿敷治疗糖尿病足的效果。方法 随机将 64 例糖尿病足Ⅰ级阶段病人分为 2 组,在全身治疗及局部处理基础上,实验组用 0.1% 利凡诺溶液湿敷患处;对照组用生理盐水加普通胰岛素湿敷;结果 实验组有效率 87.8% ,平均愈合时间( 10.2±4.4 ) d ,对照组分别为 67.7%,(14.6±4.6)d ,两组比较,均 P < 0.01 ,差异有极显著性意义。结论 0.1 %利凡诺溶液湿敷治疗糖尿病足Ⅰ级阶段效果显著。
简介:通过原位下的高压同步辐射X光衍射技术,对具有钙钛矿结构的La0.4Bi0.1Ca0.5MnO3中存在的Jahn-Teller畸变,进行了研究。实验表明在压力的作用下,样品中的畸变有所减小,超于理想的立方结构,并且在1.4GPa左右存在一个过渡相。
简介:Zr1-xTixCo(x=0,0.1,0.2,0.3)alloyswerepreparedbyarc-meltingmethodandtheeffectofTisubstitutiononhydrogenstoragepropertieswasstudiedsystematically.Hydrogendesorptionpressure-composition-temperature(PCT)measurementswerecarriedoutusingSievert’stypevolumetricapparatusforZrCo(at473K,573Kand673K)andZr1-xTixCoalloys(at673K),respectively.ProductsafterdehydrogenationwerecharacterizedbyX-raydiffraction(XRD).Inaddition,thekineticsofZr1-xTixCohydridewasinvestigatedat473Kand673K,respectively,underhydrogenpressureof5MPa.ResultsshowedthatTisubstitutionforZrdidnotchangethecrystalstructureofZrCophase.Withtheincreaseoftemperaturefrom473Kto673K,theextentofdisproportionationforZrCoalloyincreased.WithTicontentincreasingat673K,thedesorptionequilibriumpressureofZr1-xTixCo-H2systemselevatedandthedisproportionationreactionofZr1-xTixCoalloyswasinhibitedeffectively.TisubstitutiondecreasedthekineticsrateandtheeffectivehydrogenstoragecapacityofZr1-xTixCoalloysslightly.Generallyspeaking,itwasfoundthatZr0.8Ti0.2Coalloyhadbetteranti-disproportionationpropertywithlessdecreaseofeffectivehydrogenstoragecapacitywhichwasbeneficialtotritiumapplicationintheInternationalThermonuclearExperimentalReactor(ITER).