Temporal bibliographic networks     

《Journal of Informetrics》2020,14(1):101006

We present two ways (instantaneous and cumulative) to transform bibliographic networks, using the works’ publication year, into corresponding temporal networks based on temporal quantities. We also show how to use the addition of temporal quantities to define interesting temporal properties of nodes, links and their groups thus providing an insight into evolution of bibliographic networks. Using the multiplication of temporal networks we obtain different derived temporal networks providing us with new views on studied networks. The proposed approach is illustrated with examples from the collection of bibliographic networks on peer review.  相似文献   

Effect of class imbalance in heterogeneous network embedding: An empirical study     

《Journal of Informetrics》2020,14(2):101009

Network science has been extensively explored in solving various bibliometrics tasks such as Co-authorship prediction, Author classification, Author clustering, Author ranking, Paper ranking, etc. While majority of the past studies exploit homogeneous bibliographic network (consists of singular type of nodes and edges), in recent past there is a surge in using heterogeneous bibliographic entities and their inter-dependencies using heterogeneous information networks (HIN). Unlike homogeneous bibliographic networks, a bibliographic HIN consists of multi-typed nodes such as Author, Paper, Venue, etc. and corresponding relations. Thus bibliographic HIN is more complex and captures rich semantics of underlying bibliographic data as well as poses more challenges. Since a real-world HIN may have different number of instances for different node types, class imbalance is ubiquitous. Recent studies discuss class imbalance in brief and exploit meta-path-based strategies to address the issue. However, there is no work which quantitatively study the effect of class imbalance in regards to solving real-world bibliometrics tasks. Therefore, this paper first proposes a metric to estimate class imbalance in HIN and study the effects of class imbalance over two bibliometrics tasks, namely (i) Co-authorship prediction and (ii) Author's research area classification, using node features generated by network embedding-based frameworks for DBLP dataset. From various experimental analysis, it is evident that class imbalance in bibliographic HIN is an inherent characteristic and for better performance of the above-mentioned bibliometrics tasks, the bibliographic HINs must consider Author, Paper, and Venue as node types.  相似文献   

关注“非物质遗产”:从博物馆定义看科技藏品/展品的价值与表达          下载免费PDF全文

朱幼文 《自然科学博物馆研究》2020,(1):39-46

国际博协2007年的博物馆定义,将教育确定为博物馆的首要目的,将征集、保护、研究、传播并展出的对象规定为“人类及人类环境的物质及非物质遗产”。从这一视角分析,科技藏品/展品最重要的价值在于它所承载的自然、科技、历史和文化信息;科技博物馆基于科技藏品/展品的研究、传播与展示设计的基本出发点,是以“科学教育”为目标,揭示其中的“非物质科学文化遗产”,即“物”与“人”的关系。  相似文献   

国际著名检索系统收录我国高校学报的情况分析及应对策略     

高雪山  王晶  钟紫红  贾贤  黄冬华  李忠富  佟建国  张嵘  王蕾  刘淑萍 《编辑学报》2007,19(4):301-303

通过对美国SCI、Ei、MEDLINE、CA 等4种国际著名检索系统收录评价体系及我国高校学报被这4种国际著名检索系统收录情况的分析,认为我国高校学报应从提高学术质量、提升刊物的国际化程度、强化期刊的编排出版规范、缩短出版周期、注意英文写作规范、重视引文分析数据、加强对国际检索机构进行有针对性的宣传并与之动态联系等几方面入手,方能提高被国际著名检索系统收录的可能性.  相似文献   

国内外农业信息化研究述评   总被引：8，自引：0，他引：8  

赵静  王玉平 《图书情报知识》2007,(6):80-85

国外农业信息化建设依靠大力推广应用信息技术,建立了完善的农业信息服务系统、健全的农业信息化政策法规,这些是我国农业信息化建设中值得借鉴的经验。本文在综合国内外农业信息服务体系和信息技术应用等方面的理论和实践研究的基础上,提出了有待进一步研究和建设的内容,旨在为发展我国西部农业信息化提供一定的借鉴和启示。  相似文献   

Result merging methods in distributed information retrieval with overlapping databases   总被引：5，自引：0，他引：5  

Shengli Wu  Sally McClean 《Information Retrieval》2007,10(3):297-319

In distributed information retrieval systems, document overlaps occur frequently among different component databases. This paper presents an experimental investigation and evaluation of a group of result merging methods including the shadow document method and the multi-evidence method in the environment of overlapping databases. We assume, with the exception of resultant document lists (either with rankings or scores), no extra information about retrieval servers and text databases is available, which is the usual case for many applications on the Internet and the Web. The experimental results show that the shadow document method and the multi-evidence method are the two best methods when overlap is high, while Round-robin is the best for low overlap. The experiments also show that [0,1] linear normalization is a better option than linear regression normalization for result merging in a heterogeneous environment.

Sally McCleanEmail:

  相似文献   

Hyperactive Grey Objects     

Keith G. Jeffery  Anne Asserson 《Publishing Research Quarterly》2007,23(1):71-77

Previous papers on grey literature by the authors have described (1) the need for formal metadata to allow machine understanding and therefore scalable operations; (2) the enhancement of repositories of grey (and other) e-publications by linking with CRIS (Current Research Information Systems); (3) the use of the research process to collect metadata incrementally reducing the threshold barrier for end-users and improving quality in an ambient GRIDs environment. This paper takes the development one step further and proposes “intelligent” grey objects. The hypothesis is in 2 parts: (1) that the use of passive catalogs of metadata does not scale (a) in a highly distributed environment with millions of nodes and (b) with vastly increased volumes of R&D output grey publications with associated metadata; (2) that a new paradigm is required that (a) integrates grey with white literature and other R&D outputs such as software, data, products and patents (b) in a self-managing, self-optimizing way and that this paradigm manages automatically curation, provenance digital rights, trust, security and privacy. Concerning (1) existing repositories provide catalogs; harvesting takes increasing time ensuring non-currency. The end-user expends much manual effort/intelligence to utilize the results. The elapsed time of (1) the network (2) the centralized (or centrally controlled distributed) catalog server searches (3) end-user intervention becomes unacceptable. Concerning (2) there is no paradigm currently known to the authors that satisfies the requirement. Our proposal is outlined below. Hyperactive combines both hyperlinking and active properties of a (grey) object. Hyperlinking implies multimedia components linked to form the object and also external links to other resources. The term active implies that objects do not lie passively in a repository to be retrieved by end-users. They “get a life” and the object moves through the network knowing where it is going. A hyperactive grey object is wrapped by its (incrementally recorded) formal metadata and an associated (software) agent. It moves through process steps such as initial concept, authoring, reviewing and depositing in a repository. The workflow is based on the rules and information in the corporate data repository with which the agent interacts. Once the object is deposited, the agent associated with it actively pushes the object to the end-users (or systems) whose metadata indicate interest or an obligation in a workflowed process. The agents check the object and user (or system) metadata for rights, privacy, security parameters, and for any charges and assure compatibility. Alternatively the object can be found passively by end-user or system agents. The object can also associate itself with other objects forming relationships utilising metadata or content. Declared relationships include references and citations; workflowed relationships include versions and also links to corporate information and research datasets and software; inferenced relationships are discovered relationships such as between documents by different authors developed from an earlier idea of a third author. Components of this paradigm have been implemented to some extent. The challenge is implementing—respecting part two of the hypothesis—the integration architecture. This surely is harnessing the power of grey.

Anne AssersonEmail:

  相似文献   

关于现代热轧板带生产引进相关技术资料整理及归档的思考与实践     

于楠  崔红 《辽宁科技学院学报》2007,9(4):65-65,31

笔者结合工作实际,阐述了在工作实践中对技术资料整理过程中所遇见的一些情况,包含了从准备工作到开展工作.直至工作结束所获得的一些经验及心得.  相似文献   

How I teach evidence-based epidural information in a hospital and keep my job     

Tumblin A 《The Journal of perinatal education》2007,16(4):68-69

A childbirth educator reveals her dilemma in teaching evidence-based practice in today's high-tech birth climate. She focuses on strategies to use when sharing epidural information with expectant parents.  相似文献   

论农村党组织在构建和谐社会中的作用     

寇翔 《唐山学院学报》2007,20(3):36-38,48

当前我国一些农村党组织存在许多不容忽视的问题,如领导班子凝聚力不强,干群关系紧张等,这些问题直接影响着"三农"问题的解决和基层政治的稳定。文章据此提出,农村党组织必须加强理论学习,切实提高理论运用能力,增强领导班子的团结和凝聚力,提高执政能力;不断研究新情况、解决新问题,增强开拓创新能力;树立正确的权力观,密切党群关系;提高应对复杂局面和突发事件的社会管理能力。  相似文献