| 邱小敏,奉国和,刘宇东.时间加权z 指数探测热点关键词研究[J].情报工程,2021,7(1):016-030 |
| 时间加权z 指数探测热点关键词研究 |
| Research on Hot Keywords Detected by Time Weighted Z-index |
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| DOI：10.3772/j.issn.2095-915X.2021.01.002 |
| 中文关键词: z 指数；绝对词频；时间加权被引值；研究热点；发展趋势 |
| 英文关键词: z-index; absolute word frequency; time weighted citation value; research hotspot; development trend |
| 基金项目:广州市科技计划基础与应用基础研究专题面上项目“突发词探测理论、方法与应用研究题目”（202002030384）。 |
| 作者 | 单位 | | 邱小敏 | 1. 华南师范大学经济与管理学院 广州 510006 | | 奉国和 | 1. 华南师范大学经济与管理学院 广州 510006 | | 刘宇东 | 2. 华南师范大学计算机学院 广州 510631 |
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| 中文摘要: |
| [ 目的/ 意义] 构建关键词热度h 值模型，探究近年图书情报领域热点与发展趋势。[ 方法/ 过程]基于学者Prathp 的z 指数模型，对关键词词频和文章被引值进行赋权，引入前人时间加权思想，多维角度归一化处理，计算热度值与年度排名，获得趋势。[ 结果/ 结论] 比较加权前后绝对词频、z 指数和关键词热度h 值，排名结果差异明显；热度h 值模型可提升热点关键词排名，拉低非热点关键词排名，排名情况验证h 值的有效性，效果优良。 |
| 英文摘要: |
| [Objective/ Significance] To construct the h-value model and explore the hot spots and development trends in the field of library and information in recent years. [Methods/Process] Based on the z-index model of Prathp, this paper weights the keyword frequency and the quoted value of the article, introduces the time weighting thought of predecessors, normalizes the data from multiple angles, calculates the heat value and annual ranking, and obtains the trend. [Results /Conclusions] The absolute word frequency, z-index and h-value of keyword popularity were compared before and after weighting, and the ranking results were significantly different. The h-value can improve the ranking of hot keywords, and pull down the ranking of non-hot keywords. The ranking situation verifies the validity of the h-value, and the effect is good. |
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