TEA-CO_2激光多光子解离2,2-二氯1,1,1-三氟乙烷分离氢氘同位素

本工作从CF_2ClCCl_2F经AlCl_3催化重排、铜粉催化与三乙醇胺反应得到CF_3CHCl_2。经与重水交换得到CF_3CDCl_2(D丰度93.5％),二者红外光谱有很大差别,前者在842cm~(-1)处有强吸收;后者在842cm~(-1)的吸收大为减弱,而在944cm~(-2)、986cm~(-1)出现C-D键的强吸收。944cm~(-1)处的吸收恰与CO_2激光器输出P(20)支线相匹配,致使激光一次脉冲(～3焦耳/脉冲)的照射,可分解8.9％(CF_3CDCl_2压力为9.6乇),而CF_3CHCl_2的吸收与CO_2激光器输出波长不匹配,辐照不引起分解。利用此原理,将人工配制CF_3CHCl_2:CF_3CDC1_2=4:1的2乇样品,用激光辐照,可选择性分解CF_3CDCl_2,达到同位素富集的效果。目前已获得辐照100次脉冲,分离因数     

XeCl准分子激光引发Fe(CO)_5光催化已烯-1异构化反应的研究

在XeCl准分子激光引发Fe(CO)_5光催化已烯-1异构化反应中,其主要反应产物为反式-已烯-2,并有少量的顺式-己烯-2.本文研究了产物得率与Fe(CO)_5浓度的依赖关系.实验表明存在着非线性光化学过程.     

PROBLEMS OF U-SHAPED BELLOWS WITH NONLINEAR DEFORM TION OF LARGE AXISYMMETRICAL DEFLECTION(Ⅰ)—COUNTING NONLINEAR DEFORMATIONS OF RING SHELLS AND COMPRESSED ANGLE OF BELLOWS

This paper follows the work of[1,2].There are some progress in dealing withmoderately small rotations(the squares of rotation angles are the order of magnitudeof strains)of middle surface normals of inside and outside ring shells and compressedangle of bellows.Calculation results agree with experiments well.To bellow design,the method given in this paper is of practical value and the discussion of the influenceof compressed angle on characteristic relation is helpful.     

激光浓缩硫同位素

1975年R.V.Ambartzumian和V.S.Letokhov等用调频的高功率脉冲TEACO_2激光辐照SF_6气体,获得了~(34)SF_6的同位素浓缩,浓缩因子高达2800.以后美国德国和我国用相似的方法均获得了~(34)SF_6的同位素浓缩.我们用聚焦的脉冲TEACO_2激光器辐照SF_6+H_2混合物.也取得了~(34)SF_6的同位素浓缩,浓缩因子高达386.同时还研究了激光脉冲次数、气体压力和透镜焦距对浓缩因子的影响.     

具有温度自校准功能的光纤折射率传感器

提出一种具有温度自校准功能的光纤折射率（RI）传感器,传感头结构由2段很短的多模光纤（MMF）之间夹熔一段对折射率不敏感的光纤布拉格光栅（FBG）构成,传感头总长度为14 mm,FBG可以为折射率测量提供良好的温度校准功能。实验结果证明,该传感器的折射率灵敏度为126 nm。其干涉光谱共振波长的温度灵敏度为35.09 pm/℃,用于温度校准的FBG的温度灵敏度为11.14 pm/℃。相比于普通的折射率传感器,这种具有温度自校准功能的折射率传感器具有良好的实用前景。     

BOB经营与管理案例分析

本文主要从BOB的经营模式、管理模式两个角度出发，对BOB的媒介经营、管理状况进行了分析，探索其运营模式，也指出了存在的问题，并提出应对办法。     

ON PROBLEMS OF U-SHAPED BELLOWS WITH NONLINEAR DEFORMATION OF LARGE AXISYMMETRICAL DEFLECTION(Ⅱ)——COUNTING VARIATION OF THICKNESS DISTRIBUTION

On the basis of paper[1],assuming the logarithm of thickness at arbitrary point on a U-shaped bellows meridian is linear with the logarithm of distance between that point and axis of symmetry,perturbation solutions of the corresponding problems of large axisymmetrical deflection are given.The effects of thickness distribution variation,which result from technology factors,on stiffness of bellows are discussed.     

Problems of U-shaped bellows with nonlinear deformation of large axisymmetrical deflection (I)-counting nonlinear deformations of ring shells and compressed angle of bellows

This paper follows the work of [1,2]. There are some progress in dealing with moderately small rotations (the squares of rotation angles are the order of magnitude of strains) of middle surface normals of inside and outside ring shells and compressed angle of bellows. Calculation results agree with experiments well. To bellow design, the method given in this paper is of practical value and the discussion of the influence of compressed angle on characteristic relation is helpful.     

双组分体系分散阈值的测定及应用

双组分体系分散阈值的测定及应用陈宜,郭士岭,程爱珠（郑州工学院化工系郑州,４５０００２）关键词分散阈值,分散量,ＣｕＯ,ＮｉＯ,ＨＺＳＭ－５分散阈值与活性组分及载体相互作用有关,是催化研究中的重要参数。对分散阈值的研究大都仅涉及了单组分活性物质在载体...     

U型波纹壳轴对称大挠度非线性变形问题(Ⅰ)——计及圆环壳的非线性变形、压缩角

本文是文献[1、2]工作的继续,在以下方面作了发展:考虑了内、外圆环壳中面法线的中小转动变形(转角的平方与应变是同阶小量);计及了压缩角.计算结果与实验符合良好.本文方法对波纹壳的设计计算有实用价值,有关压缩角对特征关系影响的讨论有助于工程设计.