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关键词： 倒排索引   标识符   排序   重分配   压缩  

摘要： 由于信息科技的飞速发展,数据爆炸式增长,形成了人类史上前所未有的海量文本信息。面对海量的文本信息,倒排索引作为一种有效的全文索引技术,能够快速准确地帮助人们查找所需要的信息。但是海量的文本信息形成了规模庞大的倒排索引,其规模最大可达原文的300%,所以倒排索引的压缩是十分必要的。倒排索引生成算法的一般流程是docID分配、Posting Lists生成和Posting Lists压缩。常见的标识符分配算法有基于URL排序的标识符分配算法和基于交叉的标识符重分配算法;常见的Posting Lists压缩算法有Unary Code、Variable Byte Code、 Simple-9和PForDelta等。本文提出了基于TermID序列排序的标识符重分配算法。通过遍历已创建的倒排索引生成正排表,规定正排表内termID序列的排序规则,并按照该规则对正排表中的文档记录进行排序得到新顺序的文档序列,然后根据新的文档顺序依次为文档分配新标识符,重新创建倒排索引。本文实现了基于URL排序的标识符分配算法(URL)、基于交叉的标识符重分配算法(IBDA)、基于TermID序列排序的标识符重分配算法(SBDRA)等标识符分配算法和VByte、Simple-9、Simple-16、New PFD、Opt PFD、PForDelta等posting lists压缩算法。使用Wikipedia网站文档数据集,实现了18组混合交叉实验。实验结果表明,对于大规模的文档数据集,本文提出的基于TermID序列排序的标识符重分配算法性能优于基于URL排序的标识符分配算法和基于交叉的标识符重分配算法,其生成的倒排索引具有更好的整体压缩效果。

关键词： DOI   一篇   标识符   万方数据   基金会   杂志   机电产品开发   创新  

摘要： 由北京万方数据股份有限公司运行的中文DOIR注册机构是IDF(国际DOI基金会)正式授权的DOI注册机构,负责开展各种中文数字资源的DOI注册及服务。为了促进中国期刊的全球标准化推广工作,促进中文学术信息的网络传播与利用、提高中国期刊的全球影响力。我刊于2009年5月与万方数据签约注册DOI。1 DOI介绍

关键词： DOI   一篇   标识符   万方数据   基金会   杂志   机电产品开发   创新  

摘要： 由北京万方数据股份有限公司运行的中文DOI注册机构是IDF(国际DOI基金会)正式授权的DOI注册机构,负责开展各种中文数字资源的DOI注册及服务。为了促进中国期刊的全球标准化推广工作,促进中文学术信息的网络传播与利用、提高中国期刊的全球影响力。我刊于2009年5月与万方数据签约注册DOI。

关键词： cellular computing   the great salmon run   neural black-box identifier design   coldstart phenomenon   automotive engines  

摘要： In this investigation, a cellular version of a recent spot-lighted metaheuristic called The Great Salmon Run ( TGSR) algorithm is developed for evolving the architecture of Artificial Neural Network ( ANN). The main motivation behind the current research is to find out whether the proposed metaheuristic algorithm is able to cope with difficulties associated with designing an accurate and robust neural black-box identifier. To attest the applicability of the proposed method, the resulted strategy is applied to a real-life challenging identification problem, i. e. identifying the exhaust gas temperature ( T-exh) and engine-out hydrocarbon emission ( HCraw) during the coldstart operation of an automotive engine. Generally, the coldstart operation is regarded as a highly non-linear, uncertain and transient phenomenon which in turn can be a very good problem for verifying the authenticity of the proposed hybrid identification strategy. Through the conducted experiments, it is proved that the proposed identification strategy can be used to identify the main operating parameters of coldstart phenomenon.

关键词： 俄国社会民主工党二大   集中制   民主制   普列汉诺夫   高放   布尔什维克党   斗争   列宁   思想建党  

摘要： 三年以来,《中国延安干部学院学报》分期连载高放教授的《国际共产主义运动史纲(从19世纪中叶到21世纪初)》。拜读后,觉得这是当前我国理论界较新、较好的著作,也可谓是最高水平的国际共运史专著。高放教授无愧于共运史界的泰斗,超越耄耋之年仍然笔耕不辍,让我辈弟子钦佩之至。连载

关键词： DOI   一篇   标识符   万方数据   杂志   机电产品开发   创新  

摘要： 由北京万方数据股份有限公司运行的中文DOI;注册机构是IDF（国际DOI基金会）正式授权的DOI注册机构,负责开展各种中文数字资源的DOI注册及服务。为了促进中国期刊的全球标准化推广工作,促进中文学术信息的网络传播与利用、提高中国期刊的全球影响力。我刊于2009年5月与万方数据签约注册DOI。

关键词： Authority control   name authority data   linked data   discovery layers   BIBFRAME   Virtual International Authority File   vocabulary ontrol  

摘要： This article suggests that catalogers can provide authority control for authorsof journal articlesby linkingtoexternal international authority databases. It explores the representation of article authors from three disciplines in four databases: International Standard Name Identifier (ISNI), Open Researcher and Contributor ID (ORCID), Scopus, and Virtual International Authority File (VIAF). VIAF and Scopus are particularly promising databases for journal author names, but we believe that a combination of several name databases holds more promise than relying on a single database. We provide examples of RDF links between bibliographic description and author identifiers, including a partial BIBFRAME 2.0 description

关键词： Author identifiers   ORCID   research support   scholarly communication  

摘要： The ORCID (Open Researcher and Contributor ID) registry helps disambiguate authors and streamline research workflows by assigning unique 16-digit author identifiers that enable automatic linkages between researchers and their scholarly activities. This article describes how ORCID works, the benefits of using ORCID, and how librarians can promote ORCID at their institutions by raising awareness of ORCID, helping researchers create and populate ORCID profiles, and integrating ORCID identifiers into institutional repositories and other university research information systems. © 2016, Published with license by Taylor & Francis.

关键词： K-anonymity   Privacy Preserving   Quasi-identifier  

摘要： In this paper, a new method to select quasi-identifier (QI) to achieve k-anonymity for protecting privacy is introduced. For this purpose, two algorithms, Selective followed by Decompose algorithm, are proposed. The simulation results show that the proposed algorithm is better. Extensive experimental results on real world data sets confirm efficiency and accuracy of our algorithms. © 2005 - 2016 JATIT & LLS. All rights reserved.

标准号: ISO/IEC 29177-2016