| 时间加权z指数探测热点关键词研究 |
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| 引用本文： | 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(1). |
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| 作者姓名： | 邱小敏 奉国和 刘宇东 |
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| 作者单位： | 华南师范大学经济与管理学院;华南师范大学计算机学院 |
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| 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)。 |
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| 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。
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| 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 |
Research on Hot Keywords Detected by Time Weighted z-index |
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| Authors: | QIU Xiaomin FENG Guohe LIU Yudong |
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| Institution: | (School of Economics&Management,South China Normal University,Guangzhou 510006,China;School of Computer Science,South China Normal University,Guangzhou 510631,China) |
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| Abstract: | 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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| Keywords: | z-index absolute word frequency time weighted citation value research hotspot development trend |
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