[目的/意义]为克服关键词绝对词频分析的局限性,以关键词多因素加权及得分排名实现领域热点与趋势探索。[方法/过程]构建年度-关键词频次矩阵,用水平加权和垂直加权处理关键词词频,设计相对词频模型,计算关键词加权综合分值,以获得更有效的关键词排序。[结果/结论]基于关键词加权排序,可以识别量高质优型、量低质优型和突变型关键词,有利于挖掘研究热点和分析趋势。
[Purpose/significance] In order to overcome the limitation of the absolute word frequency analysis of the keywords, the hot spots and trends in the field are explored by using the multi-factor weighting and ranking of the keywords.[Method/process] It constructs the annual-key frequency matrix, processes the word frequency of horizontal and vertical weighting, and derives the formula of relative word frequency to get the weighted comprehensive score of keywords, in order to obtain more effective keyword ranking.[Result/conclusion] Based on keyword weighted ranking, three types of keywords, including keywords in large quantities & high quality, keywords in little quantities & high quality, and burst terms, can be identified, greatly benefiting focus mining and trends analysis.
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