Photoluminescence from Ge-SiO2 thin films and its mechanism

Ge-SiO₂ thin films were deposited on p-type Si substrates using the radio frequency (rf) magnetron sputtering technique with a Ge-SiO₂ composite target. Films were annealed in N₂ ambience for 30 min at 300℃—1000℃ with an interval of 100℃. Through the X-ray diffraction, the average size of Ge nanocrystals (nc-Ge) was determined. They increased from 3.9 to 6.1 nm with increasing annealing temperature in the range of 600℃—1000℃. Under ultraviolet excitation, all samples emit a strong violet band centered at 396 nm. With the formation of nc-Ge, the samples exhibit another emission of orange band with the peak at 580 nm and its intensity increases with the increasing size of nc-Ge. The peak positions of two bands do not shift obviously. Experimental data indicate that the violet band comes from GeO defect and the orange band originates mainly from the luminescence centers at the interface between the nc-Ge and SiO₂ matrix.     

大地测量学数学基础Torben Krarup论文选集

大地测量学数学原理是现代各种地面测量和卫星定位导航的基础。作为20世纪最著名的大地测量学家之—Torben Krarup在该领域做出了杰出的贡献。他是开创现代大地测量学的先锋，从1969年就在该领域被广泛认同，1999年被国际大地测量协会授予最高奖—Levallois奖。     

C/1995 O1(Hale-Bopp)彗星的光变研究

汇集了上海天文台佘山观测基地自 1996年 4月 2 2日至 1997年 5月 2日期间所得的C/1995O1(Hale -Bopp)彗星的CCD观测资料 ,得出了这些资料的测光归算处理结果 ,并在此基础上对此彗星的光度变化规律进行了分析研究 .     

南瓜籽生奶的研制

本文研究了利用南瓜籽作原料，生产南瓜籽生奶的工艺方法。该饮料具有驱杀寄生虫、通乳等保健功能，营养丰富，味鲜可口。     

F-generation law and recognition of system law

If a system is not disturbed (or invaded) by some law, there is no doubt that each system will move according to the expected law and keep stable. Although such a fact often appears, some unknown law breaks into the system and leads it into turbulence. Using function one direction S-rough sets, this article gives the concept of the F -generation law in the system, the generation model of the F -generation law and the recognition method of the system law. Function one direction singular rough sets is a new theory and method in recognizing the disturbance law existing in the system and recognizing the system law.     

Endogenous Stackelberg Leadership with Uncertain Information

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液相芯片中功能性聚苯乙烯微球的合成及鉴定

采用分散聚合法合成了粒径可控、单分散的聚苯乙烯微球,考察了单体苯乙烯和引发剂偶氮二异丁腈的浓度以及稳定剂聚乙烯基吡咯烷酮的分子量对微球粒径的影响.采用后修饰法对合成的空白微球进行表面羧基功能性修饰,耦联单克隆抗体的免疫测试结果表明微球表面结合探针分子的能力达到国际同类产品水准.     

基于Struts构架的企业Web管理信息系统模式研究

文章首先介绍了B/S三层客户/服务器结构,并分析了XM L和三层客户/服务器的有关技术,在此基础上提出了一种新的企业信息系统集成解决方案：用B/S三层客户/服务器搭建企业信息系统的动态集成.最后以实际的案例对该模型进行了简单的分析.     

浅析桥头跳车的原因及防控措施

文章讨论和分析了道路常见通病之一的桥头跳车问题，论述了跳车的危害，分析了产生跳车的原因，以及从设计、施工、管养等方面采取防治措施。     

传统中国山水画与现代中国山水画之比较

中国传统画源远流长，形成自己独特的审美概念。画家要立足于本民族，研究开拓。现代中国画贵在独创．在新与旧。东方和西方的交融中，锐意进取，紧跟时代，创作出精品。