情报检索系统的基本信息
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情报检索系统
information retrieval systems
对情报资料进行收集、编辑、管理和检索的系统。现代情报检索系统是由电子计算机、通信网络和终端设备等组成的自动化系统，可进行情报资料的收集、标引、分析、组织、存储、检索和传播等工作。计算机情报检索可分为数据检索、文献检索、图谱检索、事件检索等类型。计算机情报检索的服务方式又可分为三类：①定题情报服务。它是针对相对固定的用户提出的要求，定期对新到文档进行检索，及时向用户提供所需信息。②回溯情报检索。它是根据用户的要求，对过去某段时间内积累收藏的全部文献，进行主题检索，一般采用脱机批处理方式。③联机情报检索。它采用人机对话的方式，用户在计算机终端上经过通信线路直接与计算机对话，能在短时间内获得检索结果。
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