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.     

二(环戊二烯基)(双烯酮亚胺基)镱配合物的合成和晶体结构

双烯酮亚胺基作为辅助配体在金属有机化学中的应用已经引起了广泛注意,并且发现部分双烯酮亚胺基金属配合物在催化一些极性和非极性单体的聚合中显示良好的催化活性。我们曾经报道具有大体积的双烯酮亚胺亚[{C6H3-2,6-i-Pr2NC（Me）}2CH]^-（L^-）是合成混配型稀土金属化合物的理想配体,为了进一步研究这类稀土金属化合物的合成及反应性能,本文通过双烯酮亚胺基镱二氯化物LYbCl2（THF）2与2倍量的环戊二烯基钠反应,分离得到了标题化合物,并测定了其晶体结构。     

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。     

火花熔蚀—电感耦合等离子体光谱法分析地质矿物

火花熔蚀－电感耦合等离子体光谱法（SA－ICP）用于测量锆石中铪－锆比值和锰铁矿瘤中的铈、钴、铁、铅、镍和磷。用信背比和信噪比的序贯单纯形优化法建立了用于高压火花和氩气ICP系统的六个操作参数。将磨细的样品与铜压成饼，并从样品中熔蚀出的分析物和基体元素的原子发射信号的时间相关性给出一种用火花来作选择取样的方法。测量锆石中的铪、锆浓度比的精密度为4％（相对标准偏差）。对于锰铁矿瘤，根据分析线对锰（Ⅱ）257.610纳米线强度比的光谱测定结果达到分析精密度范围为7－14％（相标准偏差）。分析的准确度用参比物USGS诺得（Nod)P-1的标准物加入法来决定，而与锰浓度的测量无关。