共查询到20条相似文献，搜索用时 328 毫秒
1.
O. P. Shesternikova M. A. Agafonov L. V. Vinokurova E. S. Pankratova V. K. Finn 《Scientific and Technical Information Processing》2016,43(5-6):315-345
This paper presents the results of the JSM-method for automated support of scientific research (ASSR JSM-method) implemented in a computer intelligent system (IS-JSM), which predicts the development of diabetes in patients with chronic pancreatitis. For the first time the ASSR JSM-method is applied to a sequence of expanding databases of facts, which was used for the detection of empirical regularities (ERs), viz., preserved causes of the studied effect (development of diabetes in patients with chronic pancreatitis). To recognize ERs in the IS-JSM, we used an algebraic lattice of JSM-reasoning strategies (inductive inference rules). These results have an informative clinical interpretation and prove the usefulness of data mining using the IS-JSM, which can be used as a tool for evidence-based medicine. 相似文献
2.
参观了加拿大不列颠哥伦比亚大学图书馆（UBC）的自动存取书库之后，调查了自动存取系统（ASRS）在北美图书馆的应用概况，指出ASRS系统具有节约空间，解放人力，快速存取、存放灵活、自由扩客以及防震等优点，其在国内图书馆的应用前景广阔。 相似文献
3.
樊博 《现代图书情报技术》2010,26(4):35-40
针对目前电子政务中空间数据集成分析功能研究不足的现状,提出一种有效的空间数据转化集成方法,将地理空间数据、非空间属性数据、空间谓词数据以及电子政务事务数据进行集成,构成面向政务分析的更为全面的数据源。在此基础上,设计多维空间数据模型来集成这些数据源。突破现有GIS查询分析功能,支撑更为复杂的空间数据与非空间数据联动查询的模式。 相似文献
4.
当前国内外实体文献储存的方式主要有三种：普通书库、密集书库和高密度自动仓储书库（ASRS）,三者在土地利用率、适合文献类型、科技含量与文献提取速度、文献排列方式、文献保存环境等方面各有不同特点.经比较估算,高密度自动仓储书库的建设成本略低于普通闭架书库,高于电动密集书库;在运营成本方面,高密度自动仓储书库最低,其次是电动密集书库,普通闭架书库最高.以上估算结果与海外相关研究成果基本一致.由此可见,ASRS虽然科技含量高,存取速度快,但建设与运营成本并不像人们想象的那样高不可攀,不失为一种既节约土地又节省资金的解决方案.图书馆应当根据不同的文献类型及利用率,综合考虑多种因素,选择合适的储存方式.表5.参考文献9. 相似文献
5.
基于多层特征的字符串相似度计算模型 总被引：18，自引：6，他引：12
针对计算字符串相似度传统方法的不足之处,提出以相似元作为字符串的基本处理单元,综合考虑相似元的字面、语义及统计关联等多层特征的字符串相似度计算方法。对常规计算方法中存在的,由相似元排序引起的相似元位置信息丢失问题进行了修正。实验结果表明该算法的有效性,并且对句子间、段落间的相似度计算有启发意义。 相似文献
6.
A. V. Zhozhikashvili 《Scientific and Technical Information Processing》2015,42(6):397-401
This article describes the application of the language of category theory to comparison with a sample in order to formalize the similarity method and the difference method, which underlie the JSM method for automatic hypotheses generation. 相似文献
7.
题名自动分类标引探讨 总被引：2，自引：0，他引：2
本文重点论述计算机分类标引的一种方法：字面相似度语义逻辑分析法。根据字面相似度值的三种不同情况,通过语义逻辑关系分析,确定Ａ级、Ｂ级阈值。Ａ级为归类中心词。从而达到最终归类的目的,使归类结果更具科学性。 相似文献
8.
[目的/意义] 提出一种新的词族识别方法,用于构建语义工具和辅助检索扩展,以降低编表专家的认知负担,提高语义工具构建和更新的效率。[方法/过程] 首先通过同现统计和相似度计算建立学科领域的概念语义网络,再利用社会网络分析中的Island算法进一步识别该网络中的词族。并以金融学科为例,比较该方法与层次聚类算法、“词素后方一致”方法识别词族的效果。[结果/结论] 结果发现,Island算法的效果优于层次聚类算法,并与“词素后方一致”方法各具优势,可以结合使用,取长补短。 相似文献
9.
One of the main applications of citation is to find articles that are relevant to a particular article. However, not all citations are equally relevant to the target article. This paper presents an approach to identify the most relevant citation(s). To this end, the Normalized Similarity Index (NSI) is proposed to quantify the similarity between the source and target of a citation base on the co-citations and references shared by them. To validate the method, NSI was calculated for five citation networks and was compared with the peer review grades for the relevancy between the source and the target articles. The results showed a significant correlation between the NSI ranks and those of peer review. Also, combined linkage (CL) and weighted direct citation (WDC) were calculated from the same data. According to the results of comparison between the NSI with other similarity measures, in most cases, NSI did better than others at reproducing the peer rankings. Our principal conclusion is that the NSI can be used to prioritize the citations of given highly cited article, and represent knowledge flow from the target article. 相似文献
10.
《Journal of Informetrics》2020,14(2):101024
This article highlights the importance of using polar coordinates when studying functions, in particular in relation to generalized h-type indices. Concretely, generalized h-type indices are essentially polar coordinates. This observation ties informetric ideas to standard mathematics. This article is essentially meant to provide tools for further studies. 相似文献
11.
樊博 《现代图书情报技术》2011,(9):54-59
针对目前公共突发事件的预警情报缺少空间信息分析的现状,在地理信息系统(GIS)的基础上,设计空间关系数据的计算方法,获得突发事件位置周边的空间关系;然后对应急管理过程中的空间数据和非空间数据进行集成,得出面向突发事件预警分析的更为全面的数据源;最后,提出空间关系信息的过滤算法,从海量的数据源中找出影响灾情等级的关键性空间情报,为政府的应急预警规划提供新的决策视角。 相似文献
12.
FCA中的概念语义相似度计算 总被引：2，自引：0，他引：2
形式概念分析和领域本体是两种形式化方法，其目标都是构建概念的模型。提出一种计算FCA中的概念语义相似度的方法，实验结果表明，该方法对概念语义相似度计算是有效的。 相似文献
13.
We carried out an empirical study of aggression in relation to different personal traits. In this article we present results obtained for different forms of aggression, including results of machine-learning experiments with the AQJSM method. The method distinguishes several classes with different levels of aggression defined with a special form, as well as making causal inferences with AQ preprocessing and the first stage of JSM method of extraction of cause and effect relationships. The proposed method produces acceptable results for both small datasets and big data with incomplete information. 相似文献
14.
一个好的方法具有良好的可移植性,可在多个领域得到合适的应用。随着图书馆自身的发展需要,我们也不能守着一成不变的思想去建设图书馆事业,只有吸取其他领域精华,发挥其他领域方法的长处,结合图书馆的实践找到创新点,才能更好的发展图书馆事业。本文试将运用于企业的方法——定标比超应用于高校图书馆中,希望能引起大家的共鸣,从而为高校图书馆工作的研究和展开找一个新的切入点。 相似文献
15.
《Journal of Informetrics》2023,17(1):101381
Main path analysis (MPA) is an effective method widely accepted in science and technology for extracting knowledge diffusion paths. Traditional citation analysis assumes that all citations are treated equally. In contrast, this paper proposes a new MPA framework from the perspective of citation structure and content. Three indicators are considered to adjust edge weight: (1) Structural similarity, (2) Topic similarity and (3) Sentiment analysis. This study takes the bullwhip effect and the Internet of Things domain as examples to verify the reliability and feasibility of improved MPA. The results show that the improved main path uncovers the knowledge trajectories appropriately, which has an ability to distinguish citations and detect important papers. This research enriches MPA theory and provides future research directions from perspective of citation structure and content. 相似文献
16.
邢美凤 《现代图书情报技术》2012,(1):34-39
提出一种改进的基于相似度计算的科技文献关键词选取算法。先利用N-gram算法提取领域词库,再综合利用领域词库和常识词库,对最初选择的关键词重新切分,进行给定关键词之间的语义对比。语义相似度大于一定阈值的关键词被认为是表达同一意义的同义词,将同义词在文献库中合并,从而解决关键词冗余问题。实验结果可以证明该方法的有效性。 相似文献
17.
大多数传统的数据挖掘算法,通常是在二进制值的事务数据库中在单一层次上发现属性之间的关联关系即关联规则,但是大多数的数据库包含有大量量化的值。通常人们采用分区的方法处理量化值,然而这种处理方法带来分区过硬的问题。本文使用模糊的方法从Web日志中发现模糊泛化的Web网页之间的关联规则,它们能够体现出带模糊浏览时间的网页之间的关联关系。通过实例分析表明,该算法在可承受的计算时间内可对Web日志中的用户存取模式进行有效的模糊泛化关联规则的提取。 相似文献
18.
在分析标签共现的基础上, 提出一种基于共现的标签谱聚类方法, 该方法直接利用标签的共现关系来测度标签的相关性, 能够避免将标签表示成向量空间模型时所带来的高维稀疏等问题.在衡量标签的共现相似性时, 设计一种综合的方法, 并给出标签综合共现相似度的计算公式.与传统的单一利用标签的个体共现来衡量其相似性相比, 综合的方法同时考虑标签的个体共现相似性和标签的群体共现相似性, 能够更加精确地刻画标签的共现相似度.实验结果表明, 基于综合共现相似度的标签共现谱聚类方法具有较好的效果. 相似文献
19.
《Journal of Informetrics》2007,1(1):35-46
This paper presents a method for assessing the quality of similarity functions. The scenario taken into account is that of approximate data matching, in which it is necessary to determine whether two data instances represent the same real world object. Our method is based on the semi-automatic estimation of optimal threshold values. We propose two methods for performing such estimation. The first method is an algorithm based on a reward function, and the second is a statistical method. Experiments were carried out to validate the techniques proposed. The results show that both methods for threshold estimation produce similar results. The output of such methods was used to design a grading function for similarity functions. This grading function, called discernability, was used to compare a number of similarity functions applied to an experimental data set. 相似文献
20.
《Journal of Web Librarianship》2013,7(3):183-197
This article presents an approach to teaching information literacy in an academic course from a socio-technical perspective. It includes an overview of the course framework, a review of course contents, and an analysis of student responses provided through pre- and post-course surveys. The premise of the course design was that students bring a set of technical and information skills to class that address specific but not generalized information literacy goals. By designing a course to engage students from this perspective, the instructors hoped to find a new method for approaching information literacy instruction. 相似文献