国内外图书情报领域本体研究热点分析比较

[目的/意义]在图书情报领域,本体的研究一直受到众多学者所追捧。国内外在图情领域对本体的研究各有侧重,本文为了了解国内外图书情报领域本体研究的发展状况。[方法/过程]本文选取2012-2017年CNKI中文数据库、SCI外文数据库中图书情报领域的本体研究论文,对其进行科学计量以及可视化表示,对其研究热点关键词和热门作者进行计量分析,从研究方向、研究程度和研究新颖性3个方面进行对比分析。[结果/结论]得到国内外图书情报领域本体研究的对比分析结论,从而认识到国内外研究的差异,为后续研究者提供研究改进方向。     

Reproducing “academic successors” or cultivating “versatile experts”: influences of doctoral training on career expectations of Chinese PhD students

This investigation focuses on Chinese doctoral students’ career expectations, and examines how the students’ career expectations changed over time under the influence of doctoral training based on survey data of 1467 doctoral students from 8 Chinese universities. Doctoral students’ evaluations of doctoral training were identified. The examination indicates that more than half of doctoral students expect a non-academic profession, and more than 70% of students did not alter their professional expectations radically over time. Logistic regression model results indicate that doctoral students’ career expectations and their changes over time were influenced by doctoral training in their university environment, students’ relationships with supervisors, and students’ experiences of collaboration with non-academic organizations. Doctoral students are dissatisfied with doctoral training that does not encourage and prepare them for diverse career paths. We conclude that in the present environment, the goal of doctoral training should not only be the reproduction of “academic successors” but also be the cultivation of “versatile experts.”     

A decentralized control method for frequency restoration and accurate reactive power sharing in islanded microgrids

To achieve the frequency restoration (FR) and accurate reactive power sharing (RPS) in islanded microgrids (MGs), an improved P-f droop control is proposed. Firstly, the inverter impedance, whose value is set by the virtual impedance method, is used to minimize the impact of line resistance on powers coupling and RPS. Then, in order to restore the frequency of distributed generations (DGs) to the rated value, the reference is changed for compensating the frequency deviation (FD) caused by loads change. And the fast FR rate is achieved under a large constant k. Besides, in order to eliminate the inaccuracy of RPS caused by voltages difference (VD), the line voltage drop (LVD) is used to compensate the voltage droop characteristics. The use of voltage feedback ensures that the obtained voltage is desired after the LVD compensation. Finally, the simulation in RT-LAB indicates the effectiveness of proposed method in an islanded MG model.     

基于全渠道理论的图书馆资源建设与服务模式重构

[目的/意义]随着新一轮信息技术革命的深化,全渠道用户群体开始崛起,并改变着信息消费与利用形态。全渠道策略已经从单纯的商业层面扩展到社会层面,图书馆可以利用全渠道的理念与方法进行资源建设与服务模式的重构,更好地适应用户群体的变化,满足用户的需求。[方法/过程]引入全渠道理论,讨论全渠道理念与策略在图书馆资源建设与服务中的适用性,并据此提出相关实施建议。[结果/结论]图书馆引入全渠道策略可以更好地识别不同的服务阶段与服务方式,整合不同的服务主体,从而更好地为用户提供全方位的服务。     

问诊类移动医疗APP用户信任的影响因素分析——基于过程、制度和特征的多维研究视角

[目的/意义] 旨在探究问诊类医疗APP用户信任的影响因素,提炼出对运营和管理具有积极意义的意见和建议。[方法/过程] 在整合信任建立模型和声誉二维评估模型的基础上,从过程、制度和特征的多维视角出发,分析影响问诊类移动医疗APP用户信任的因素,提出研究假设并构建研究模型。实证研究部分,采用"日志追踪+调查问卷"的规范性实验方法,选取"春雨医生"移动医疗APP的用户为实验者,收集了280份有效数据并利用SmartPLS2.0对模型进行检验。[结果/结论] 医生认知声誉和医院认知声誉正向影响患者对医生的信任;APP认知声誉显著促进患者对医疗APP的信任。感知医生认证正向影响医生信任;感知APP监管正向影响患者对医生和APP的信任;患者对医生的信任促进对移动医疗APP的信任。信息质量显著促进患者对APP的信任。     

提高远程教育中人文素质教育的思考

文章以应用写作这门课程为例,就远程教育专业教学中如何加强人文素质教育,达到专业知识和人文素质双提高作一点阐述.     

我国体育核心期刊关键词标引分析

运用文献资料法,以2008年13种体育核心期刊为样本,对所抽查各期的每篇论文的关键词标引进行统计分析。发现在关键词标引数量上基本符合国家标准要求,略显低平,存在着关键词标引主题不清、重复、泛意词多、漏标、概念专指性差等问题。应引起作者与编者的重视,加强关键词标引环节管理检查,提高期刊质量。     

检察环节刑事不合法证据的转化与补救

非法证据违反了证据的合法性原则,但违反证据合法性的并非都是非法证据,对于这些证据不能以非法证据排除规则简单的予以排除,在检察审查逮捕、审查起诉环节可以采取合法的转化手段予以补救.     

中国数字电视发展进程中的问题及对策

数字电视是泛指包括电视信号的采集、处理、发射、传输和接收全过程的数字化系统。本文从介绍数字电视入手,分析了我国数字电视发展进程中存在的主要问题,并针对这些问题提出了相关解决对策,以期推动我国广播电视的数字化进程。