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主题词要直接地、客观地反映出论文所论述的事物或研究的对象与问题,即论文的中心内容.主题词应根据《化工汉语主题词表》标引.采用三级标引:一级为款目主题词,二级限定一级,三级根据论文内容做进一步的说明.例如:磺化聚砜超滤膜的制备(1)超滤膜:款目主题词(2)制备:限定词(3)磺化聚砜:说明语在选用主题词进行组配时,应优先考虑概念组配,即几个相组配的主题同之间在概念上必须具有某种逻辑关系或语法关系.组配的结果,要求慨念清楚、确切,只能表达
Thesaurus should directly and objectively reflect the objects or issues discussed in the essay, that is, the central contents of the essay. Thematic terms should be based on the Chemical Industry Chinese Thesaurus. For the title of the headline, the two levels of limited level, three according to the content of the paper to do further instructions.For example: sulfonated polysulfone ultrafiltration membrane preparation (1) ultrafiltration membrane: headline terms (2) Preparation: limited Words (3) sulfonated polysulfone: Description language in the selection of keywords for the allocation, the concept should be given priority to match, that is, the concept of several groups with the same concept must have some kind of logical or grammatical relations The result of grouping requires that the concepts be read clearly, precisely and only expressed