Subject indexing is the key step in creating subject retrieval system of water saving agriculture literature database.
主题标引是建立“节水农业文献数据库”主题检索系统的关键工作。
With the spatial data management, the system can serve for conditional retrieval and special subject retrieval about spatial data and their attributes objectives.
该系统具有空间数据管理的特性、对象的空间分布查询、条件查询和专题查询等功能。
Practice is the crucial link of document retrieval course and the subject selection is the essential of practice effect.
实习是文献检索课的关键环节，实习课题的选择是实习效果好坏的关键。
Other retrieval tools provide searching based on user profiles, document and subject profiles, document content and the use of intelligent agents.
其他的检索工具是基于使用者概况、文件与主题概况、文件内容、及使用智慧型代理人等以提供蒐寻的方法。
Data standards, metadata, document codes, subject indexes and filing systems are widely used to enable efficient information correlation, storage and retrieval.
数据标准、元数据、文件编码、主题索引和文件归档系统得到了广泛使用，以确保有效信息的相关性、存储和检索。
Figure 13 shows the document with the subject “Marked for retrieval".
图13显示的文档标上了 “Markedfor retrieval”。
The author thinks that the researches on subject information retrieval application databases are the key for the development of digital library.
文献领域主题信息检索应用数据库技术的系统研究是数字图书馆建设的关键之一。
From objective factors and subject factors, this paper analyzes the factors influencing the retrieval efficiency of network information, and advances some improving countermeasures.
从客体因素与主体因素两个方面，对网络信息检索效率的影响因素进行了分析，并提出了相应的改善对策。
Conceptual information retrieval navigation based on the subject concept tree provides convenience to the user.
基于主题概念树的概念检索导航为用户检索提供了便利。
He deems that the efficiency of information retrieval can be raised if citation index retrieval and subject index retrieval are integrated.
认为如果将引文标引检索与主题标引检索结合起来，可更好地提高情报检索效率。
Subject to this Agreement, no part of this Site may be reproduced or stored or included in any public or private electronic retrieval system or service without Aconex's prior written permission.
以本协议为前提，在未得到Aconex事先书面许可的情况下，本网站的任何部分均不得被复制、储存或包括在任何公众或私人的电子检索系统或服务中。
This paper introduces the retrieval language, analyzes on the application of the retrieval language in library and retrieval system, and discusses on the methods for the classification and subject.
介绍了检索语言，分析了检索语言在图书馆和检索系统中的应用，论述了分类和主题方法。
Question answer System is a subject of great topic study orientation in studying natural language processing, mainly including question analysis, information retrieval and answer collection.
自动问答系统是自然语言处理研究中的一个热门的研究方向，主要集问题分析、信息检索、答案抽取等于一体。
Because the aim of information retrieval is to serve the users, the correlated degree of indexing words and the subject of the document should be the criteria of drawing them.
情报检索的目的是为用户服务，因而标引词的提取应以其与文献主题内容相关程度为标准。
It is a new subject of computer application to enhance retrieval ability of MIS.
提高MIS检索能力是计算机应用的一个新课题。
The difference between the methods of classification and subject is analysed. The feasibility of logical combining classification with subject in information retrieval is theoretically discussed.
从理论上讨论了分类法与主题法的异同以及分类与主题逻辑组合进行文献检索的可行性。
Aim: to explore how to select suitable searching words (subject word and random word) in medical document retrieval.
目的：探讨医学文献检索中如何对检索词(主题词和自由词等)进行适当的选择。
Focused crawler is a subject-oriented information retrieval system. It can meet the users' need and retrieve information that is relevant to some specific subjects from the web automatically.
聚焦爬虫是一种面向主题的信息搜集系统，可以根据用户需要从互联网上自动搜集到主题相关信息，在主题搜索引擎、站点结构分析等方面取得越来越广泛的应用。
Subject gateway, coming to meet the need of information retrieval on Internet, is one of the effective resource discovery tools on Internet.
网络学科主题门户是为适应因特网海量信息的搜索需求而出现的，是对因特网上学术信息的一种有效的发现和组织工具。
Study of Web Information Retrieval Based on Structure and Subject;
无法从拓扑结构数据库中检索“全局属性”。
Study of Web Information Retrieval Based on Structure and Subject;
无法从拓扑结构数据库中检索“全局属性”。
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