BEPCⅡ高频发射机和环流器的调整和测试

北京正负电子对撞机升级改造工程(BEPCⅡ)将采用的频率500MHz、输出功率250kW的高频发射机和环流器已安装、调整、测试和验收完毕,这是国内建立的第一套500MHz/250kW发射机系统.本文将详细介绍机器的调测试的原理和各项测量内容及结果, 并比较设计指标和要求,来阐述此发射机的实际技术指标和测试性能.     

Demonstration of Soliton Solutions of DNLS Equation by Liouville Theorem

In the inverse scattering transform (IST), the reflectionless Jost solutions are combined by their analytic properties in the complex spectrum parameter plane, and then can be shown to satisfy the two Lax equations indeed by Liouville theorem. So the corresponding soliton solutions certainly satisfy the nonlinear equation by compatibility condition. Especially the multi-soliton solutions of DNLS equation can be demonstrated in this way. PACS Numbers: 05.45.Yv, 02.30.-f, 11.10.Ef     

腺嘌呤及其β-环糊精包结物的光谱研究

通过紫外光谱的摩尔比法确定了腺嘌呤与β-环糊精（β－CD）包结物的包结比为1：1，通过紫外光谱和荧光光谱研究了腺嘌呤在酸性，中性，及碱性条件下的光谱变化及与β－CD包结物的光谱变化，分别求得了它们与β－CD包结的平衡常数。     

Bioaccumulation and excretion of arsenic compounds by a marine unicellular alga,polyphysa peniculus

Polyphysa peniculus was grown in artificial seawater in the presence of arsenate, arsenite, monomethylarsonate and dimethylarsinic acid. The separation and identification of some of the arsenic species produced in the cells as well as in the growth medium were achieved by using hydride generation–gas chromatography–atomic absorption spectrometry methodology. Arsenite and dimethylarsinate were detected following incubation with arsenate. When the alga was treated with arsenite, dimethylarsinate was the major metabolite in the cells and in the growth medium; trace amounts of monomethylarsonate were also detected in the cells. With monomethylarsonate as a substrate, the metabolite is dimethylarsinate. Polyphysa peniculus did not metabolize dimethylarsinic acid when it was used as a substrate. Significant amounts of more complex arsenic species, such as arsenosungars, were not observed in the cells or medium on the evidence of flow injection–microwave digestion–hydride generation–atomic absorption spectrometry methodology. Transfer of the exposed cells to fresh medium caused release of most cell–associated arsenicals to the surrounding environment.     

双全纯映照的一些偏微分不等式

该文在有界星形圆型域上建立一些与双全纯星形映照有关的偏微分不等式．作为应用，给出有界星形圆型域上ε星形映照以及近似星形映照的一些充分判别条件．     

盲孔法测量复合材料残余应力释放应变矩阵的有限元分析

对盲孔法测量正交各向异性复合材料残余应力释放应变矩阵进行有限元分析.以碳/环氧正交各向异性材料板为基础,对于不同孔深的盲孔进行有限元计算,得出与其相对应的释放应变矩阵,并分析孔深对释放应变矩阵的影响.为实际工程中残余应力的测试奠定了基础.     

技术组织的进化

通过对技术发展过程的分析，揭示了技术组织形式必然要进化的原因。介绍了技术组织的历史发展过程，指出随着生产的发展、技术的进步，技术组织会不断地进化。     

以科学发展观为指导努力开创科技工作新局面

阳曲县作为山西省太原的近郊县，近年来认真贯彻十六大精神和“三个代表”重要思想，紧紧围绕全面建设小康社会的目标，以加快发展为第一要务，立足阳曲县，全面落实科教兴县战略，以项目带动产业发展，以科技加快区域创新，先后实施国家、省、市、县科技计划项目157项，引进推广工农业新技     

1998年至2003年山西省科技进步统计分析

通过山西省5年期间科技进步统计检测指标位次，进一步分析了科技进步统计监测体系的四个一级指标。     

DCS和FCS及其在火电厂中的应用

介绍了集散控制系统和现场总线控制系统，并对它们在火电厂中的应用做了分析。