NⅢ,OⅣ和FⅤ的双电子激发六重态的跃迁与组态相关

用全相对论量子力学方法计算ＮⅢ，ＯⅣ和ＦⅤ的１ｓ２ｓ２ｐ３６Ｓ０－１ｓ２ｓ２ｐ２３ｓ６Ｐ的跃迁精细结构，并讨论非动力学和动力学相关效应     

最高阶元个数是4p的有限群

本文证明了如果有限群G恰有4p个最高阶元,p为素数,则群G为可解群,除非G同构于S5.     

Er3+-Yb3+共掺磷酸盐玻璃放大器的大信号增益与量子效率理论分析

研究大信号工作状态下的Er^3 -Yb^3 共掺磷酸盐玻璃波导放大器的增益与量子转换效率。从量子转换效率的定义出发，得出了增益、抽运光功率以及量子转换效率三者之间关系的解析表达式。通过数值求解大信号工作状态下的Er^3 -Yb^3 共掺系统的速率方程与光功率传输方程，讨论了Er^3 浓度、Yb^3 浓度、Yb^3 与Er^3 浓度比率、抽运光功率以及放大器长度等因素对量子转换效率的影响。结果表明提高Er^3 浓度与增加放大器长度均有助于提高量子转换效率，高Er^3 浓度掺杂需要相应的高Yb^3 浓度与之相匹配以减小由于高浓度Er^3 掺杂引起的上转换效应，Yb^3 浓度的提高将降低器件的量子转换效率，Yb^3 -Er^3 浓度之比取1～2较好。     

“四靶串接”类氖锗软X光激光趋向饱和增益的理论研究

介绍了“四靶串接”设计思想,继对接方式之后,又提出了顺接方式来提高X光激光增益,使四靶总长度达到5.6cm。我们研制了程序系列来模拟这一实验,直接给出测点处的X光激光的强度。先用上轮“双靶对接”实验结果检验我们的程序系列,使得23.2nm激光线的结果与实验数据相符合,再用它模拟“四靶串接”实验。在实验之前,对各靶之间距离和角度,以及这些数据对实验结果的敏感程度作了预估,用以指导实验。实验结果证明理论模拟是正确的。23.2nm和23.6nm两条激光线已明显趋于饱和,其小讯号增益长度积GL分别达到18.3和17.6,有效GL分别达到16.4和15.7。X光激光的发散角已减小到3～4mrad,超过美国利弗莫尔实验室(LLNL)已发表的最好结果。     

Red yeast catalyzed animation of olefinic bonds and synthesis of optically pure S-amino acids

By using red yeast (Rhodotorula rubra AS 2.166) resting cells which possess the phenylalanine ammonia-lyase (PAL, EC 4.3.1.5) activity as biocataiyst, enantiomerically pure S-3-(2-chloro-phenyl) alanine (2a) and S-3-(3-hydroxyphenyl) alanine (2d) have been synthesized from the corresponding 3-aryl substituted acrylic acid (1a and 1d) and ammonia.     

高速微粒子场的全息诊断技术

本文用全息摄影方法研究了爆炸产物阵面上微粒子场。据高速摄影测试结果表明,产物阵面微粒子约以5000米/秒的速度飞散。着重讨论了全息摄影允许的微粒子运动速度与其它参数关系的计算公式,同轴全息和离轴全息的特点和适应范围以及如何用空间滤波技术获得高分辨率的微粒子图象。     

A STUDY OF METHANE OXIDATIVE COUPLING OVER La-Me-O(Me=Mg,Ca,Sr,Ba)CATALYSTS BY MEANS OF TPD

CO2TPD was used to study the surface basicity of La-Me-O mixed oxides and O2-TPD was employed to study the surface active oxygen species. Among numerous catalysts studied , La Ba O (La/Ba=7/3) catalyst had the strongest basicity, and gave the highest CH4 conversion and C2 selectivity.     

光子学及其讨论

本文简述了光子学提出后,国内外的反响。并就处理高速摄影与光子学的关系问题,提出了“高速光子学”,把它作为光子学的一个分支。这个分支的主要研究对象是高速过程或超快现象,并以时间—空间分辨方式提供信息。末了,探讨了光子学本身的发展前景:随着光计算机研究工作的进展和实现,将确立光子学的牢固地位。     

Fluorinated carbon with ordered mesoporous structure

Fluorination and structural change of highly ordered mesoporous carbons were studied. Mesoporous and fluorinated carbons with ordered cubic structure were synthesized and characterized with TEM, FTIR, adsorption, and EDX.     

Regioselective Decomposition of 11-Substituted-16α,17α- methyleneazopregna-1,4-dien-3,20-dione

16α, 17α-Methylenepregnanes are not only the important chemical intermediates but also the excellent pharmaceutical candidates1. In order to study the structural relationship of D-ring of corticosteroid to the antiinflammative activity, 11-substituted-1…