分布式学术搜索引擎研制及其大数据应用

受“搜索引擎”流行的影响,目前大家已经习惯把图书情报领域使用的“情报检索系统”称之为“学术搜索引擎”。无论从技术层面上还是应用层面上,尽管二者有很大的共同点,但也有很大差异。传统的集中式的搜索引擎已经无法满足飞速发展的信息爆炸和普及化的海量需求用户,能够提供“云服务”的分布式搜索引擎已经成为必然。文章主要内容包括学术搜索引擎涉及的关键技术、分布式搜索引擎的架构,以及分布式搜索引擎在大数据领域的主要应用价值三个方面,最后给出了分布式搜索引擎RMSCIoud的典型应用介绍。     

High Res at High Speed: Automated Delivery of High-Resolution Images from Digital Library Collections

As primary source materials in the library are digitized and made available online, the focus of related library services is shifting to include new and innovative methods of digital delivery via social media, digital storytelling, and community-based and consortial image repositories. Most images on the Web are not of sufficient quality for most media outlets, so what happens when patrons require high-resolution versions of images for use in their print publications or projects? Until recently, patrons at the University of Houston Libraries used a clunky, paper-based request process for high-resolution images that was frustrating for them and time-consuming for staff. The authors of this article outline how an interdepartmental team of University of Houston Libraries staff used Drupal to develop an automated patron request system that is modeled after online shopping cart experiences and integrates with the CONTENTdm-based University of Houston Digital Library. The article provides suggestions for libraries with digital collections about how to create a system that efficiently captures patron requests and streamlines staff delivery of high-resolution files.     

WebCT and Its Growth as a Type II Application

Abstract

Maddux, Johnson, and Willis mentioned in 1992 some “yet-to-be-developed types” that “have the potential to be Type II software if they are used in such a way that the user is given the ability to learn in new and better ways.” The authors of this paper will frame the discussion of learning management systems (LMS) around the concept of Type I and Type II applications of computers in education. We suggest that with the new trends of interoperability within WebCT, more researchers will accept WebCT as a potential Type II application. As more interactive learning objects are developed and shared on the WebCT format, it should be easier for instructors to create and teach courses that reflect the value systems expressed in the concept of Type II learning.     

中外政府数据开放运行机制的实证分析

[目的/意义] 对当前中外政府数据开放平台的运行方式及保障机制的实证对比研究,有助于我国政府数据开放的建设与发展。[方法/过程] 以各国Data.Gov平台数据为基础,运用实证分析法、统计分析法、比较分析法,从政府数据开放平台的数据层、平台层、管理层3个层面,分析各国政府数据开放的整合与利用机制、开放与协作机制及管理与评估机制的现状。[结果/结论] 我国应借鉴国外先进技术与管理经验,加快完成各省市试点工作,早日建成基于CKAN的国家级Data.gov专业平台建设。     

Robust synchronization of different coupled oscillators: Application to antenna arrays

This paper deals with the synchronization of a chain of nonlinear and uncertain models of nonidentical oscillators. Using Lyapunov's theory of stability, a dynamical controller guaranteeing the synchronization of the oscillators is determined. The problem of synchronization is transformed into a problem of asymptotic stabilization for a nonlinear system and then is formulated as a system of linear matrix inequalities where the parameter variations of the two oscillators and their differences are modeled by polytopic matrices. The theoretical result is successfully applied to an array of transistor-based oscillators used in “smart antenna” systems.     

肌酸水解酶的研究及其应用

肌酸水解酶(creatinase,EC 3.5.3.3)是临床中酶法测定肌含量是诊断肾脏功能的重要指标.本文综述了肌酸水解酶的来源、结构、酶学性质以及当前肌酸水解酶分子生物学研究现状,对肌酸水解酶在研究和应用中存在的问题进行分析,并对今后研究的发展做了展望.     

Geographical amplitude in the international generation of technology: Present situation and business determinants

Building on a rich dataset with information on 65,000 firms and 465,000 European patent applications from 1978 to 2000, this paper addresses the geographical amplitude of international technology generation. First, we show that the number of countries hosting international technological activities is increasing. The USA and some developing nations benefit from this internationalisation. Conversely, although Europe as a whole still plays a leading role in the encouragement of foreign technological activities, some European countries, such as Germany and the UK, appear to be losing their technological appeal. Second, we verify that multinational corporations (MNCs) have increased the geographical amplitude of their technological activities. In fact, the mean number of countries in which MNCs internationalised technology generation has doubled during the 23 years we have analyzed. Third, we address the business characteristics that explain this phenomenon. A negative binomial regression suggests that internationalisation is higher in MNCs showing a greater technological diversification, a higher volume of technological activity, a wider presence in international markets and more experience in the international generation of technology. Finally, American corporations and (regardless of the home country) those firms whose main technological fields are in chemistry, pharmaceuticals, or electronics, present the highest geographical dispersion of their international technological activities.     

A science need: Designing tasks to engage students in modeling complex data

In this information age, the capacity to perceive structure in data, model that structure, and make decisions regarding its implications is rapidly becoming the most important of the quantitative literacy skills. We build on Kaput’s belief in a Science of Need to motivate and direct the development of tasks and tools for engaging students in reasoning about data. A Science of Need embodies the utility value of mathematics, and engages students in seeing the importance of mathematics in both their current and their future lives. An extended example of the design of tasks that require students to generate, test, and revise models of complex data is used to illustrate the ways in which attention to the contributions of students can aid in the development of both useful and theoretically coherent models of mathematical understanding by researchers. Tools such as Fathom are shown as democratizing agents in making data modeling more expressive and intimate, aiding in the development of deeper and more applicable mathematical understanding.

基于接受理论的高校图书馆人性化服务研究——以南京邮电大学仙林图书馆为例

阐述了接受理论对图书馆开展人性化服务的启示。以南京邮电大学仙林图书馆为例,从建筑和馆舍布局人性化、资源采购人性化、学科服务人性化等方面,介绍了该馆运用接受理论开展人性化服务的经验,旨在为其他高校图书馆提供借鉴。     

利用英文歌曲优化大学英语教学

英文歌曲作为英语文化的重要组成部分,已经被作为一种重要的教学材料引入到大学英语课堂内外,为激发学生的学习兴趣,优化英语语言教学,丰富教学形式提出了一条新思路。在英语教学中恰当地运用英文歌曲辅助教学,会收到很好的效果。该文分析了大学英语课堂教学中引入英文歌曲的理论基础,阐述了其具体的应用策略及选择方式。