966nm半导体激光激发下ErYb：ZBLAN玻璃的上转换特征饱和现象

本文研究了单掺Er和ErYb共掺的ZBLAN玻璃的上转换发光现象,发现了一种新颖的“Er(0.3)Yb(0.5):ZBLAN样品上转换发光强度随激光功率变化的双对数曲线的斜率相对于Er(0.3):ZBLAN样品有明显的降低、但都保持着很好的直线”的这种“特征、饱和现象,它的上转换机制是一种新颖的“扩散－传递”机制：即Yb^3 -Yb^3 间能量扩散和随后的Yb^3 -Er^3 间能量传递。其“特征”饱和现象就是由“Yb^3 -Yb^3 ”间能量扩散导致的。     

CF X^2П（ν=1）远红外及NO X^2П（ν←0）中红外激光磁共振光谱的标识

根据塞曼效应理论和浙江磁共振（LMR）光谱原理,本文建立一了套用于标识激光磁共振光谱的模型方法,并成功地对CF X^2П（ν=1）远红外及NO X^2П（ν←0）中红外激光磁共振光谱进行了标识。为新自由基分子的激光磁共振光谱提供了快速而准确的方法。     

Be,Mg和Ca原子电四极矩E2^1D—^1S跃迁的能级和跃迁概率

利用多组态Dirac-Fock广义扩展平均能级（MCDF－EAL）方法系统地计算了重要的中性原子Be,Mg和Ca单光子电四极矩E2^1D－^1S光谱跃迁概率,计算中考虑了重要的核的有限体积效应,Breit修正和QED修正,所得结果和最近的实验数据及理论计算值进行了比较,此外还从理论上预言了Ba和Mg单光子电四极矩E2^1D－^1S光谱跃迁概率过程,在库仓规范中,跃迁概率A（Be)=3884.9s^-1,跃迁概率A（Mg)=2357.2s^-1和跃迁概率A（Ca)=48.1s^-1。     

The Non—local Thermodynamical Equilibrium Effects on Opacity

Based on the detailed configuration accounting(DCA) model,a method is developed to include the resonant photoionization and the excitation-autoionization in the non-local thermodynamical equilibrium (NLTE) average atom (AA) model.Using this new model,the mean charge states and the opacity are calculated for NLTE high-Z plasmas and compared with other results.The agreement with AA model is poor at low electron density.The present results agree well with those of DCA model within 10%.The calculations show that the NLTE effects on opacity are strong.     

Exact Solution of the Milburn Equation for the Two—Mode Two—Photon Jaynes—Cummings Model

We adopt an algebraic method to study the two-mode two-photon Jaynes-Cummings model governed by the Milburn equation and find an exact solution of Milburn equation of the system.The influence of the intrinsic decoherence on the nonclassical effects of the system is also discussed.     

High—Dimensional Integrable Models with Infinitely Dimensional Virasoro—Type Symmetry Algebra

Using every realization of the Virasoro-type symmetry algebra[σ(f1),σ(f2)]=σ(f1f2-f2f1),we can obtain various high-dimensional integrable models under the meaning that they possess infinitely many symmetries,By means of a concrete realization ,many(3 1)-dimensional equations which possess Kac-Moody-Virasoro-type infinite dimensional symmetry algebras are obtained.     

Dynamics of Transiently Chaotic Neural Network and Its Application to Optimization

Through adding a nonlinear self-feedback term in the evolution equations of nerual network,we introduced a transiently chaotic neural network model.In order to utilize the transiently chaotic dynamics mechanism in optimization problem efficiently,we have analyzed the dynamical pocedure of the transiently chaotic neural network model and studied the function of the crucial bifurcation parameter which governs the chaotic behavior of the system.Based on the dynamical analysis of the transiently chaotic neural network model,Chaotic annealing algorithm is also examined and improved.As an example,we applied chaotic annealing method to the traveling salesman problem and obtained good results.     

BINARY AND TERNARY ION EXCHANGE KINETICS SO4^2——Cl^——NO3^——201×7SYSTEM

Kinetics of chloride/sulfate,chloride/nitrate and nitrate/sulfate forward exchanges and reverse exchanges at solution concentrations of 1N,0.2N and 0.02 N on 201×7 strong base anion exchange resin,respectively,have been examined at 25℃.It is found that the forward and the reverse exchange rates of the two given ions at low solution concentration,respectively,under identical conditions can be controlled by different mechanisms,while those at high solution concentration are all controlled by particle diffusion.The ternary exchange rates of sulfate/(chloride+nitrate) and nitrate/(chloride+sulfate)have also been examined.     

锗酸盐晶体压致非晶化的研究

高压拉曼散射研究表明．ＣｕＧｅＯ３，Ｌｉ２ＧｅＯ３和Ｌｉ６Ｇｅ２Ｏ７三种晶体分别在７，１２和１１ＧＰａ压力下转变为非晶。在高于起始转变压力以上一定范围压致非晶是可逆的，ＣｕＧｅＯ３，Ｌｉ２ＧｅＯ３和Ｌｉ６Ｇｅ２Ｏ７压致非晶的不可逆转变压力分别为１４．１，２０和２０ＧＰａ。压致非晶ＣｕＧｅＯ３的重新晶化温度在６００℃附近。锗酸及系列晶体的压致非晶化与它们的成份和结构有关，随着在这一系列晶体中Ｌｉ２Ｏ含量的增加，压致非晶化的压力趋于减小。