【摘 要】
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关键词包括主题词和自由词两部分。主题词是专门为情报检索机构编制索引用的,它是从自然语言的主要词汇中选取后并加以规范化的词或词组;自由词是尚未规范化的词或词组。为方
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关键词包括主题词和自由词两部分。主题词是专门为情报检索机构编制索引用的,它是从自然语言的主要词汇中选取后并加以规范化的词或词组;自由词是尚未规范化的词或词组。为方便读者查找文献,利于专职文献检索及标引人员参考,特别是适应计算机自动检索的需要,本刊要求“专题笔谈
Keywords include keywords and free words in two parts. The keyword is used exclusively for indexing of information retrieval agencies. It is a word or phrase selected and standardized from the main vocabulary of natural language. Free words are words or phrases that have not been standardized yet. For the convenience of readers to find the literature, which is conducive to full-time document retrieval and reference personnel reference, in particular, to meet the needs of automatic computer retrieval, the magazine requires "
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