Optical Properties of Fullerenated Poly(epoxy propyl carbazole)

Sincethedevelopmentofmethodslformassproductionoffullerenes,therehasbeengTeatinterestinit-Manyresearchgroups'havepaidgreatattentiontothefiJllerene-dopedpolymersinceWang'discoveredinl992thatfullerene-dopedPVKhasanapparentlyincreasingphotoconductivity.WehavereportedthechendcalattachmentofCcocagestothecarbazolegroupsonpoly(epoxypropylcarbazole)(PEPC)chainsbyFriedel-Craftstypereaction'.Here,theopticalpropertiesoffullerenatedPEPCwereinvestigated,whichwillshowitsgoodphotoconductivepropeFtiesbe…     

CYCIAE型回旋加速器负离子剥离引出的光学行为研究

为了CYCIAE型回旋加速器的剥离靶轴线及旋转角的概念设计,必须对负离子剥离后的光学特性进行研究,基于根据CYCIAE型回旋加速器剥离引出特点编制的程序CYCRS,计算了CYCIAE30加速器不同能量束流引出剥离点的位置,并与实际位置进行比较,证明计算所用的理论及方法是正确的,同时,考察了剥离后的束流空间运动的光学特性.在此基础上,确定了CYCIAE70回旋加速器能量为35—70MeV的束流引出剥离点位置.     

Integrated Image Associative Memory and Its Optical Implementation

We present the concept of integrated processing to combine intuitive processing of neural networks with logical processing of the conventional digital computer. We investigate a way to embody the concept in the neural network system by introducing external constraints in terms of external input. The effect of the external input is analyzed using the generalized projection method. The concept of integrated processing is applied to an image associative memory system, and the system is optically implemented for high-speed parallel processing incorporating it with the computer. The experimental result is presented to illustrate the effectiveness of the external input to control the output of the image associative memory.     

饱和光纤中的各阶孤子及孤子相互作用

首先研究了非线性饱和光纤中各阶孤子存在的幅值范围，与标准非饱和情况的非线性薛定谔孤子非常不同，即一阶孤子幅值范围是１．４≤Ｎ≤∵．０，二阶孤子为４．０≤Ｎ≤♀．０，三阶孤子为７．０≤Ｎ≤≤１５．０，并分析了各阶孤子的传输特性，最后研究了双一阶孤子相作用的若干特点，明确了五个方面的特性。     

Ⅱ－Ⅳ族化合物半导体超微粒子光谱性质的研究Ⅱ：硒化物、碲化物

本文报道了锌、镉、汞、铅硒化物、碲化物半导体超微粒子的制备以及它们的光谱性质，比较了它们的粗、细粒子的吸收光谱和荧光光谱的差异，以及与硫化物超微粒子的相似性，同时讨论了上述物质的超微粒子在老化过程中的行为及其原因．     

衍射光学元件的解析分析方法

从波动光学传播的菲涅尔衍射出发，探讨一次光学转换形成任意要求的图形的问题。导得两平行传播平面的函数关系，从而在确定像面分布的条件下可以逆求出原始面的振幅与倍相分布。文中给出了几个实例，充分表明这是有实用价值的一种衍射光学元件设计方法。     

Zn1-xCdxSe-ZnSe多量子阱的光学双稳态

用常压MOCVD法在GaAs衬底上生长了Zn_1-xCd_xSe-ZnSe多层结构.通过X-射线衍射谱和光致发光等方法判断,表明该材料为多量子阱结构.从室温下的透射光谱上可以观察到这种多量子阱中的n=1的激子吸收峰,并观测到起因子激子的ns量级的光学双稳态.     

Karl Menger's contributions to social thought

The work of Karl Menger in social science is briefly surveyed, in particular in the areas of marginal utility and diminishing value, utility, and uncertainty, a logic of imperatives based on deterrence, and a theory of voluntary associations in which cohesive groups are studied combinatorially.     

Fundamentals of optical design in rotating mirror cameras

The elementary optics of rotating-mirror high-speed cameras are analysed geometrically. The images in an off-axis scanning mirror are shown to lie on Pascal's limacon. The Miller principle by which shuttering is accomplished is described. A simple estimate of motion blurring is compared with the Rayleigh criterion.     

Relationship between the properties of radical cations and the rate constants and the substitution patterns in electrophilic aromatic substitution

By a charge transfer mechanism for electrophilic aromatic substitution the logarithmic plot of overall rate constants for substitution against ionization potentials is correctly predicted. Also, orientation of substitution is found to be correlated with the hyperfine coupling constants of the aromatic radical cation. The presence of radical cations under the conditions of electrophilic substitution is discussed.