I2C总线系统在彩电中的应用及维修

本文简要阐述了新型彩电中I^2C总线系统的基本原理、基本功能及其彩电维修时的特殊性，并就维修方面提出一些基本方法。     

浅谈数字光纤通信技术在智能军事指挥中的应用

旨在通过对于数字光纤通信技术的优势分析和现状研究,通过阐述C4I的具体应用来分析数字光纤通信系在军事中的具体应用实例,明确数字光纤通信在军事通信中的作用和地位来阐明其在智能军事指挥中的具体应用。     

Choices for studying choice: Assessing charter school effectiveness using two quasi-experimental methods

Two quasi-experimental methods – fixed effects (FE) and virtual control records (VCR) – were used to measure charter schooling in 14 states and two districts. The new VCR method uses all available observable charter student characteristics and prior performance to create a composite comparison record. A head-to-head comparison of the FE and VCR methods used the same charter students to test the FE control (e.g., the charter student's own traditional public school experience) and the VCR for equivalence. The comparison produced highly similar estimates; charter coefficients were identical in sign and significance and of the same general magnitudes. In an analysis of the sampling fractions included in each method using all available tested charter students, the VCR method was found to produce more generalizable results. In the policy analysis, charter school quality was found to be demographically and geographically uneven with only 19 percent of charter schools outperforming their local markets.     

玛丽·斯图亚特的婚姻外交及特征

中世纪欧洲社会等级森严。在婚姻生活中,爱情很少成为结婚的理由,尤其是王室的婚姻,往往是政治、经济或宗教利益的结果．是联姻外交的副产品。玛丽·斯图亚特和伊丽莎白一世为了英格兰的王冠所进行的错综复杂的斗争及伴随其中的婚姻外交,充分展示了王室婚姻的这一特点。     

"图书馆精神"仍然是最重要的——为"图书馆精神"辩护之一

本文对程焕文先生和黄俊贵先生的文章进行了客观分析,本着为“图书馆精神”辩护的原则,认为“图书馆精神”仍然是最重要的,并围绕此问题展开了相关的探讨。     

CCMM——一种带冲突检测的数字化图书馆可使用性度量模型

过去的数字化图书馆和网站的可用性测试通常都集中关注与图形化界面相关的事务以及DL(Digital Library)内部信息的组织,通常忽略了它们在改变工作实践或行为上的作用.本文提出了一种带冲突检测的DL可使用性度量模型CCMM(Conflicting Checked Measuring Model),CCMM在用户使用DL之前采集用户知识水平,并在用户使用DL后对应生成态度改变问题,将用户对这些问题的反应进行FD/I人格特征冲突检测,若未出现冲突,则认为数据真实可靠,可用于DL可使用性度量计算.计算的结果可用于DL优化,最后试验说明CCMM在进行DL可使用性度量上是适用、有效的.     

The Special Collection Fond of the Presidents of Ukraine as an Integrated Informational Resource for Research on the Institution of the Presidency

ABSTRACT

The article describes the functions of the special collection Fond of the Presidents of Ukraine (FPU) within the V. I. Vernadsky National Library of Ukraine, as well as the history of its formation, purpose, activities, and operational features. It emphasizes that the main characteristics of the institution are not only collecting and using various types of documents, but also research and informational-analytical work to popularize them among citizens and authorities. Unlike the US presidential libraries, in Ukraine the conception of the FPU envisages it as an integrated documentary and informational-analytical center to collect heritage materials and study the institution of the presidency as a whole. FPU also provides operative scholarly and informational resources to government officials, to the scholarly community, to the broad student community, and to society in general through the Internet portal of the V. I. Vernadsky National Library of Ukraine and social networks.     

输煤控制系统硬件结构与上位机监控软件设计

根据工况将不同的设备组合成不同的工作流程，以集散控制技术为基础，应用PLC网络实现了对输煤设备的现场控制、电控室控制和中控室控制。并以FIX软件为工具，通过定义PLC的I/O端口映射表方法，以时间、事件、故障为触发手段，设计了实时监控软件，并实现了输煤量与数据库系统的数据接口。     

伊丽莎白政府的外交政策与苏格兰问题的成功解决

本文论述了伊丽莎白政府1559—1560年在苏格兰问题上采取的循序渐进的干涉政策:适中的承诺,金钱和武器援助,公开武装干涉.在此基础上分析了英格兰取胜的根本原因:外交战略的调整;独立自主的外交政策;伊丽莎白女王与威廉·塞西尔相得益彰的合作.试图说明:苏格兰问题的解决使不列颠岛日益成为一个防御整体,在此基础上英格兰走出了一条全新的外交路线.     

Do tuition fees affect enrollment behavior? Evidence from a ‘natural experiment’ in Germany

This paper uses the introduction of tuition fees in seven of the sixteen German states in 2007 as a natural experiment to identify the effects of tuition prices on enrollment probabilities. Based on information on enrollment decisions of the entire population of high-school graduates between 2002 and 2008, I find a negative effect of tuition fees on enrollment behavior. The effect is larger than in existing studies for European countries, but of a similar magnitude as effects identified with U.S. data. A potential spill-over effect of the policy intervention to the comparison group is accounted for by using the estimation results to calibrate a structural model of the enrollment decision.