Cp_2ZrCl_2-i-BuMgBr试剂体系的研究——烯烃和炔烃的还原二聚反应和二烯烃的环化

二氯二茂锆同异丁基格氏试剂以1:2摩尔比反应,于室温下生成有机锆中间体,后者同烯烃、炔烃或二烯反应,最后生成还原的二聚物或分子内环化产物。     

DMANS——一种新型荧光闪烁体染料的寿命与能量转移的研究

本工作对一种新型荧光闪烁体染料——4-二甲胺基—4''硝基芪(DMANS)在不同介质中的光谱行为和能量转移进行了研究,发现介质的极性大小以及介质和染料间的能量转移对该闪烁体染料的荧光量子产率和闪烁发光延迟具有重大影响。研究对选择基体材料和合理组成闪烁材料配方有一定的参考价值。     

浅谈对称技巧在解决力学问题中的作用

通过质点力学的两个实例说明了对称在解决力学问题中的重要作用。     

超大规模集成电路的一些材料物理问题（I）——Cu互连和金属化

21世纪初，超大规模集成电路（ULSI）的特征尺寸将由150nm逐代缩至50nm。文章以100nmULSI器件为主，简要介绍与互连相关的一些材料物理问题，其中包括Cu互连、金属化及低介电常数介质。     

常曲率空间关于直交全脐超曲面系的特征性质

Let V_n be Riemannian space of genernal constant curvature.In this paper, we have proved following;Theorem I If a V_n(n≥5 ) admits three mutually orthogonal families oftotally numbilical hypersurfaces such that they are of constant curvature and Einsteinian and of general constant curvature respectively, then V_n is space with constant curvature.Theorem 2 If a V_n ( n ≥ 5 ) admits three mutually orthogonal famities of totally umbilical hypersurfaces, of which one is conformally flat and other two are Einsteinian and of constant curvature respectively, and latter either is of constant meam curvature, then V_n is of constant curvature.     

A ONE-STEP EXPLICIT FORMULA FOR THE NUMERICAL SOLUTION OF STIFF ORDINARY DIFFERENTIAL EQUATION

In this paper, a new one-step explicit method of fourth order is derived. The new method is proved to be A-stable and L-stable, and it gives exact results when applied to the test equation y'=λy with Re(λ)<0, Also several numerical examples are included.