DC steady-states analysis of lossy uniform transmission lines

1 Introduction In the past 20 years with the rapid development of VLSI (very large scale integration) circuits and continual spread of electric power system scale, theories on transmission lines have become an important research field where finding the analytic solutions to lossy transmission line equations remains a tough nut. Since the mathematical tool cannot provide effective help, there is no universal method to solve transmission line equations [1]. A number of researchers have obtaine…     

情感的执着与理性的超越--解悟陶渊明的人生理念及时代价值

陶渊明并非浑身“静穆”，从少年、中年、直至晚年，显然有一股济世的热情流贯在他的一生中；沧桑之后，诗人于天命取委运任化的态度，获得了一种审美化的艺术生存。这种情感的执着与理性的超越，体现出积极进取、乐观宽容的时代价值。     

关于 Volterra积分微分方程解的有界性研究

利用Liapunov泛函方程和Razumikhin技巧,研究Volterra积分微分方程解的一致有界性与一致最终有界性.结果给出了Volterra积分微分方程解的一致有界及一致最终有界的充分条件.     

极限函数可微性的一个充分条件

以极限为工具,研究了函数列的极限函数可微性问题,改进了通常的导函数列是一致收敛的较强条件,得到了一个极限函数可微性的一个充分条件,并扩大了其应用范围.yh     

上市公司年度盈余持续性影响因素研究

盈余持续性是公司盈余质量的基本特征,高持续性盈余可使得历史会计数据更具有决策相关性。利润表上列示的毛利以及在毛利基础上扣除三项期间费用后的利润为决策者经常使用的盈余指标。在使用财务指标分析法、改进的财务指标分析法和ARIMA模型计量法计量以上两个指标持续性后,得到的结果显示:不同公司盈余持续性差异较大,这对持续性的计量方法不敏感;与在毛利基础上扣除三项期间费用后的利润指标相比,公司毛利具有更好的持续性,更少受到经济因素的影响。总体而言,公司财务杠杆对盈余持续性具有显著的负向影响;公司规模与资本密集度对盈余持续性存在正向作用,但是这两个因素的显著性取决于持续性测度的计算方法;而实际控制人性质对盈余持续性没有影响。     

Hibernate中关联关系映射策略研究与实现

为解决对象模型和关系模型之间的不匹配,引入对象关系映射框架来解决。Hibernate是目前主流的ORM映射框架。分析了Web应用程序的体系结构和Hibernate体系结构。以在线购物系统为例,给出了对象关联关系映射策略,通过映射文件实现了该映射策略。实验结果表明,映射文件成功实现了该映射策略。通过Hibernate的数据持久层解决方案,提高了数据存取的速度,降低了系统的耦合性,保证了系统的扩展性。     

French Fiction:

The cataloging of music sound recordings is both challenging and interesting. As the technologies used to produce sound recordings change, these changes must be reflected in both cataloging theory and practice. Three formats: analog disc, cassette tape, and compact disk, all of which are readily available on the market, present special challenges to catalogers who must consider what might be the most effective way of handling these materials following the AACR2 cataloging rules and interpretations from Library of Congress. This paper examines the actual cataloging of those formats as done by several institutions and raises questions such as how to handle these materials in ways which will eliminate redundancy and increase efficiency in the practice of cataloging. Finally, an alternative approach, drawing on AACR2 practice in other areas, is suggested.     

Panel 2: The Implications of Digital Scholarship for Research Libraries: Challenges of Access and Preservation

ABSTRACT

The panelists present observations on the impact of digital scholarship for library goals related to information access and preservation based on their experiences in a variety of Web-influenced environments. The advent of digital forms of publishing and information retrieval signal significant changes in our understanding of library business models, user services, and the role of special collections.