共查询到20条相似文献，搜索用时 140 毫秒
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情报交流研究的文本阐释学取向引论 总被引：5，自引：2，他引：5
With a review of the evolution of the theory of hermeneutics, this paper raises the problem of knowledge gap in information communication, and from the viewpoint of hermeneutics, analyzes its crux and key issues to be resolved. It further discusses the cognitive viewpoints in information studies, compares them with the text receiving theory and stresses the positions and roles of information users as the main part in information communication. Finally, it concludes that the inevitability and impoaance of using hermeneutics to study information communication deserves to be studied and practiced in depth and breadth. 相似文献
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《中国科学院院刊(英文版)》2006,20(1)
Researchers from the CAS Institute of Optics and Electronics in Chengdu,capital of southwest China's Sichuan Province, have been successful in building China's first robot for searching and retrieving underwater foreign objects in nuclear power stations. 相似文献
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全文检索研究 总被引：11，自引：0，他引：11
A new algorithm for automatic segmentation of Chinese word with the stop word list and post-controlled thesaurus, that has absorbed the ideas from the single-Chinese character method and the thesaurus method, is given. Based on this algorithm, a new full text retrieval mode is built. 相似文献
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浅谈网络资源的组织 总被引：1，自引：0，他引：1
The rapid growth of Intemet resources has brought great inconvenience to users in searching for useful information. How to organize Internet resources effectively has become a problem of concern to information organizers and users. This article analyzes the essential impact of Intemet resources on information organization, and discusses the difficulties of Intemet resources organization. Finally, it introduces some research examples of Intemet resources organization in foreign countries. 相似文献
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1. Cohesion and Coherence According to Halliday and Hasan (1976: 4), cohesion is relations of meaning that exist within the text and that define it as a text. Cohe- sion occurs where the interpretation of some element in the discourse is dependent on that of another. Grammar and lexis are two means to realize the goal of cohesion. In other words, there are grammatical co- hesion and lexical cohesion. Coherence refers to the relationships, which link the meanings of utterances in a discourse … 相似文献
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万维网上的全文检索技术及其发展 总被引：6，自引：2，他引：4
The conception and characteristics of full text retrieval are expounded. The basic structure and key technologies of a full text retrieval system on WWW are put forward. According to the development direction of intelligent information retrieval, the author discusses three approaches of combining artificial intelligence with information retrieval. 相似文献
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论信息服务质量的全面管理和控制 总被引：7，自引：0，他引：7
The paper discusses the principles and commonly-used methods of quality management and control in information service, and provides a series of measures for quality control in information service such as attracting the users to participating in information service process and enhancing the stuff members'quality cultural level. 相似文献
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During the 6,000 years of Chinese civilization, chemistry has played an essential role.The bronzed chime bells of the Warring States Period (475-221 BC) unearthed in Hubei Province shows not only the excellence in musical instruments in ancient China, but also the technological advances in metallurgy.Chinese alchemy was not originated from the quest to turn common metals to gold, instead, it was for searching medicines for longevity of human beings, mostly practised by Taoists. 相似文献
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一种成功的检索策略——结构检索 总被引：5，自引：1，他引：5
文章介绍结构检索策略的基本原理、原则以及它的理论依据。采用结构检索策略，即根据理性的检索程序和技术检索是成功检索的关键。成功的检索策略是任务、资源、词、方法和评估5个基本连续的阶段，以及7个基本方针：（1）确定任务；（2）找出资源位置；（3）选择检索词；（4）挑选分类法；（5）执行检索；（6）评价结构；（7）如果必要，通过精练以前的决定重新检索。根据这些计划来检索的。 相似文献
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基于Web的图像搜索引擎 总被引：1，自引：0，他引：1
随着互联网的快速普及，宽带网的全力推行，网络上的图像信息急剧膨胀，多媒体文件越来越多，与此同时，用户对网上图像搜索的要求也在不断增长，在这种背景下，传统的文本搜索方式已经不能满足用的特殊需要，如何能更方便快捷地从网络上找到需要的图像或多媒体文件？于是，各种基于Web的图像搜索引擎应运而生。它们各自以不同的工作方式，使我们对网上图像信息的搜索变得非常简单，本文将从图像搜索引擎的工作原理，搜索方法以及国内外各大图像搜索引擎三个方面作一介绍。 相似文献
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四大中文搜索引擎检索性能测评 总被引：3，自引：0，他引：3
本文从定性和定量两方面对四大中文搜索引擎：百度、搜狐、新浪、天网的检索性能进行了测评,其中对定量指标进行了重点考察和分析,提出了测评检索主题选择的若干原则。最后总结了中文搜索引擎目前存在的问题和改进的方向。 相似文献
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As an information medium, video offers many possible retrieval and browsing modalities, far more than text, image or audio. Some of these, like searching the text of the spoken dialogue, are well developed, others like keyframe browsing tools are in their infancy, and others not yet technically achievable. For those modalities for browsing and retrieval which we cannot yet achieve we can only speculate as to how useful they will actually be, but we do not know for sure. In our work we have created a system to support multiple modalities for video browsing and retrieval including text search through the spoken dialogue, image matching against shot keyframes and object matching against segmented video objects. For the last of these, automatic segmentation and tracking of video objects is a computationally demanding problem which is not yet solved for generic natural video material, and when it is then it is expected to open up possibilities for user interaction with objects in video, including searching and browsing. In this paper we achieve object segmentation by working in a closed domain of animated cartoons. We describe an interactive user experiment on a medium-sized corpus of video where we were able to measure users’ use of video objects versus other modes of retrieval during multiple-iteration searching. Results of this experiment show that although object searching is used far less than text searching in the first iteration of a user’s search it is a popular and useful search type once an initial set of relevant shots have been found. 相似文献
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本文探讨了构成查新服务质量保障体系的主要组成要素：科学的管理系统、合理的业务流程、高素质的查新人员、多元化的查新信息源、内容规范及文献对比分析准确且查新结论客观公正的查新报告、完善的专家审核制度及健全的档案管理制度等。 相似文献
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Target指令是Dialog系统中一种新的检索技术。本文主要介绍该指令产生的背景、检索原理及其使用方法;着重分析了该指令存在的缺陷,并提出弥补其不足的有关技巧。 相似文献
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网络搜索数据是消费者在信息搜集和购买决策过程中真实足迹的反映,对了解消费者购买需求具有重要价值。本文运用与现有研究不同的关键词获取方法,以我国汽车市场为背景,研究网络搜索数据与销量之间的关系。首先,确定网络搜索数据的关键词,主要运用了文本挖掘技术,具体而言：①对抓取的汽车论坛文本进行Jieba分词;②利用Word2vec模型把分词结果转化为向量空间模型形式;③结合TF-IDF算法和余弦相似度算法确定关键词。然后,基于108个月的长面板数据,建立网络搜索与汽车销量的固定效应模型。最后,采取滚动窗口的方式预测最近12个月的汽车销量。实证结果显示：网络搜索与汽车销量之间存在长期均衡关系,回归模型可以解释76%的方差;网络搜索数据有助于预测我国汽车销量。 相似文献
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The string-searching problem is to find all occurrences of pattern(s) in a text string. The Aho-Corasick string searching algorithm simultaneously finds all occurrences of multiple patterns in one pass through the text. On the other hand, the Boyer-Moore algorithm is understood to be the fastest algorithm for a single pattern. By combining the ideas of these two algorithms, we present an efficient string searching algorithm for multiple patterns. The algorithm runs in sublinear time, on the average, as the BM algorithm achieves, and its preprocessing time is linear proportional to the sum of the lengths of the patterns like the AC algorithm. 相似文献