基于网络读书社区阅读行为的书目推荐模型研究

书目推荐旨在建立图书与读者之间的双向连接。新兴网络读书社区中用户的参与互动过程积累了大量用户行为数据,为书目推荐提供了丰富的数据依据。文章针对网络读书社区中的主要用户阅读行为,综合考虑用户评分、阅读状态、标签、时间信息对用户阅读偏好的体现,提出用户阅读偏好程度和偏好方向相结合的用户偏好模型,形成了个性化书目推荐。采集豆瓣读书数据进行模型检验,结果表明,该模型有效地提高书目推荐的准确性和多样性,对网络读书社区实施个性化书目推荐具有参考价值。     

电子商务与商务信息

本文以电子商务的兴起谈起,介绍了电子商务的分类及优点,着重论述了现阶段发展我国电子商务所遇到的社会环境、信息环境、经济环境中出现的一些问题,以此作为我国企业界参与电子商务活动的一点借鉴。     

电力系统继电保护装置远方在线操作的实现方法

随着电网规模的发展,变电站数量迅速增加,变电运行人员资源紧张问题突显。文章结合变电站监控系统、调度自动化系统、继电保护故障信息系统等二次系统的技术特点,以及无人值班运行管理模式的生产应用需求,开展远方切换定值区、投退软压板、查看和修改任意区定值、复归保护信号等操作,以提高工作效率、应对人力资源紧张的局面。     

参考咨询服务在信息时代的拓展

文章首先论述了信息时代参考咨询服务的发展走向，然后论述了面临新的环境，参考咨询服务必须拓展服务方式、服务内容。     

Why users keep answering questions in online question answering communities: A theoretical and empirical investigation

This study theorized and validated a model of knowledge sharing continuance in a special type of online community, the online question answering (Q&A) community, in which knowledge exchange is reflected mainly by asking and answering specific questions. We created a model that integrated knowledge sharing factors and knowledge self-efficacy into the expectation confirmation theory. The hypotheses derived from this model were empirically validated using an online survey conducted among users of a famous online Q&A community in China, “Yahoo! Answers China”. The results suggested that users’ intention to continue sharing knowledge (i.e., answering questions) was directly influenced by users’ ex-post feelings as consisting of two dimensions: satisfaction, and knowledge self-efficacy. Based on the obtained results, we also found that knowledge self-efficacy and confirmation mediated the relationship between benefits and satisfaction.     

A comparison of scholarly productivity among current professors who obtained terminal degrees

ABSTRACT

Although scholarship is important in higher education and faculty productivity expectations are continually increasing, we still do not understand the holistic view of faculty productivity. This study takes a different viewpoint on faculty productivity examining differences by university classification and by discipline. Most importantly, we sought to obtain the effects of the delivery mode of terminal degree on later faculty productivity. The mode of terminal degree via Internet delivery looks attractive to students, but this study found that this has implications for future research productivity. These three elements illustrate a different scope that has important implications for administrative leaders looking to hire future faculty as well as students thinking about becoming a future faculty member. To capture this view, 600 faculty members from 59 American universities were surveyed. From this survey, five different variables emerged to create an overall faculty scholarly productivity factor. This factor was then compared against university classification, discipline, and mode of terminal degree. Results showed surprising significant differences between university classifications and disciplines as compared to scholarly productivity. One of the most noteworthy findings was that there is a significant difference in faculty productivity based on the mode of terminal degree. Furthermore, no difference in later faculty scholarly productivity exists between that of a hybridized, online degree and a purely online degree. Again, these results indicate significant finds which have a high influence on faculty scholarly productivity, which holds important implications for the future of the university.     

美国儿童网络隐私保护概况及其启示

随着计算机和网络技术的发展,接触、使用互联网的少年儿童越来越多。少年儿童的价值观、判断力正处于建立的时期,所以必定会因为网络所呈现的不良内容,带来某些有碍他们健康成长的危险因素,使其身心受到不同程度的负面影响。美国在儿童网络隐私保护方面做了很多工作,文章从法律、网站自律和安全港模式方面分析了美国对儿童网络隐私保护的措施,以期为我国儿童的网络隐私保护提供参考。     

Improving aspect extraction by augmenting a frequency-based method with web-based similarity measures

Online review mining has been used to help manufacturers and service providers improve their products and services, and to provide valuable support for consumer decision making. Product aspect extraction is fundamental to online review mining. This research is aimed to improve the performance of aspect extraction from online consumer reviews. To this end, we augment a frequency-based extraction method with PMI-IR, which utilizes web search in measuring the semantic similarity between aspect candidates and target entities. In addition, we extend RCut, an algorithm originally developed for text classification, to learn the threshold for selecting candidate aspects. Experiment results with Chinese online reviews show that our proposed method not only outperforms the state of the art frequency-based method for aspect extraction but also generalizes across different product domains and various data sizes.     

科学家国际化识别研究

[目的/意义] 面向国内科学家国际化学术交流需求的步步逼近,研究建立中国科学家国际化识别的解决方案。[方法/过程] 分析人名唯一标识符的发展特征和研究者识别国际规范的发展趋势,基于ORCID研究提出中国科学家的国际化标识服务方案。[结果/结论] 创建中国科学家在线--iAuthor,提供中国科学家"全球学术身份证"标识服务,并嵌入科研工作流的投稿、文章发布、存储等环节。iAuthor目前注册用户已超过15 000人。大数据时代下不同系统的信息精确识别和互操作,将依赖于更多重要中间组件,例如国际唯一标识符。iAuthor建立的中国科学家国际标识符服务,将可能支持更多来源的信息资源在研究型图书馆实现融汇和互操作。     

Continuous usage of e-participation: The role of the sense of virtual community

Local governments around the world are increasingly implementing e-participation platforms to involve citizens in consultation and decision-making processes. E-participation platforms usually succeed and produce positive effects in the community when adopted in the long-term scenario. The adoption of those platforms is still a challenge for local governments. The understanding of the factors that influence the continuous intention to use e-participation over time is critical for the design of diffusion and promotion strategies that motivate the citizens to keep using e-participation. This article explores the drivers that predict the post-adoption of e-participation platforms from the perspective of the sense of virtual community theory, that is the degree of affective attachment to a given community mediated by information technology. Specifically, our research model evaluates the association between the sense of virtual community with use behaviour and the continuous intention to use e-participation. Structural equation modelling was used to evaluate the data collected from 370 citizens who experienced an e-participation platform hosted by a European capital city. We found out that the direct association between the sense of virtual community and use was significant. Even though the direct association between the sense of virtual community and the continuous intention was non-significant, the indirect association sense of virtual community to use to continuous intention was statistically significant. This finding may indicate that the use behaviour is triggered by the influence of other members of the community for a short period of time, but it does not persist to influence the continuous intention over time.