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This paper reports results from a study exploring the multimedia search functionality of Chinese language search engines. Web searching in Chinese (Mandarin) is a growing research area and a technical challenge for popular commercial Web search engines. Few studies have been conducted on Chinese language search engines. We investigate two research questions: which Chinese language search engines provide multimedia searching, and what multimedia search functionalities are available in Chinese language Web search engines. Specifically, we examine each Web search engine’s (1) features permitting Chinese language multimedia searches, (2) extent of search personalization and user control of multimedia search variables, and (3) the relationships between Web search engines and their features in the Chinese context. Key findings show that Chinese language Web search engines offer limited multimedia search functionality, and general search engines provide a wider range of features than specialized multimedia search engines. Study results have implications for Chinese Web users, Website designers and Web search engine developers. 相似文献
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2000-2011年WOS科学学期刊关键词分析——以共词和SNA为方法 总被引：1，自引：0，他引：1
科学学自上世纪20年代兴起以来,随着新兴研究方法的应用与新兴研究内容的注入,日益发展。以WOS中的科学学研究类期刊的关键词为分析对象,采用文献计量学方法、社会网络方法及统计学方法进行研究,分别从关键词词频、共现关系以及多维尺度分析方法来探索WOS科学学期刊在2000-2011年间的研究重点、相关研究领域以及聚类态势。从研究体系分层来看,科学学研究仍集中于应用研究层面;从研究内容来看,分别寻找到的热点研究领域和重要研究领域代表了当今科学学的主流研究方向。应用类的科学学研究无疑是当今科学学研究的主流,但理论、方法类的研究也并没有销声匿迹。 相似文献
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本文简要介绍了Intel的通用数据安全体系框架(CDSA),并在此基础上重点讲述了支持整个框架系统运行的一个通用安全服务——模块目录服务(MDS)。文中对MDS的结构、功能以及自身安全性进行了较为详细的分析。 相似文献
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hCLP46(human CAP10-like protein46)是从MDS-AML患者的CD34+干细胞cDNA文库中筛选出的基因.我们利用串联亲和纯化技术来筛选与hCLP46有相互作用的蛋白.通过体内交联-甘氨酸洗脱策略,检测到7条有差异的蛋白带,经液相色谱-质谱联用鉴定,得到了CNX和PDI等一系列内质网伴侣蛋白.所以hCLP46可能是一个糖蛋白,其成熟过程利用了BiP/Grp94 和CNX/CRT 2套伴侣蛋白系统. 相似文献
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Statistics literacy is a growing part of our lives. However, around 75% of social science undergraduate students experience moderate to high levels of statistics anxiety, characterized by troubling thoughts, stress and an aversion to statistical content or to learning situations using statistics. The aims of the study were to examine the psychometric properties of the Hebrew version of the Statistical Anxiety Rating Scale, and to unfold the underlying structure of the construct as perceived by 163 pre-service teachers in an Israeli college of education. Multidimensional scaling analysis (MDS) confirms the confirmatory factor analysis (CFA) findings but highlights the importance of identifying the context of anxiety (statistics course vs. statistics as a distinct discipline) and the locus of anxiety (internal vs. external). The findings can help teacher educators better monitor their students’ statistics anxiety and assist them in implementing appropriate ways of reducing it. 相似文献
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hCLP46(human CAP10-like protein46)是从MDS-AML患者的CD34+干细胞cDNA文库中筛选出的基因.我们利用串联亲和纯化技术来筛选与hCLP46有相互作用的蛋白.通过体内交联-甘氨酸洗脱策略,检测到7条有差异的蛋白带,经液相色谱-质谱联用鉴定,得到了CNX和PDI等一系列内质网伴侣蛋白.所以hCLP46可能是一个糖蛋白,其成熟过程利用了BiP/Grp94和CNX/CRT 2套伴侣蛋白系统. 相似文献
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The aim of this article is to introduce the R package semds for structural equation multidimensional scaling. This methodology combines multidimensional scaling with latent variable features from structural equation modeling and is applicable to asymmetric and three-way input dissimilarity data. This key idea of this approach is that the input data are assumed to be imperfect measurements of a latent symmetric dissimilarity matrix. The parameter estimation is performed via an alternating least squares multidimensional scaling procedure that minimizes the stress. The latent dissimilarities are estimated as factor scores within a structural equation modeling framework. Applications shown in the article involve data associated with the banking crisis and data from avalanche research. The models fitted with the semds package are compared to related methods from multidimensional scaling. The R code to reproduce all the computations is provided in the supplementary materials. 相似文献
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In this paper, the maximal length of maximal distance separable(MDS)codes is studied, and a new upper bound formula of the maximal length of MDS codes is obtained. Especially, the exact values of the maximal length of MDS codes in some parameters are given. 相似文献
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[目的/意义]旨在了解国内科技政策的热点及政策导向,以期为国家科技政策的制定和完善提供参考。[方法/过程]以2015-2018年国务院和科学技术部印发的科技政策为研究对象,运用共词分析法和社会网络分析法,以及TF-IDF算法对热点主题词进行提取并分析,采用狄利克雷主题模型(LDA)提取科技政策主题并进行主题聚类,挖掘重点关注的政策主题,并对科技政策文本运用MDS(multidimensional scaling)方法进行降维分析,并对科技政策的走向进行分析。[结果/结论]国家科技政策的制定主要围绕高新技术产业、科研诚信、专项研究、科技人才发展、科技成果转化、知识产权等主题领域进行;关于教育、产能激励、装备制造、创新创业、众创空间、加工贸易、科技成果转化与知识产权保护等主题领域已经引起并将持续受到相关政府部门的重点关注。 相似文献