中国知网与百度学术检索功能比较——从文献被引频次角度分析

Hownet Compared with Academic Search Engine Baidu——From the Perspective of Literature Cited Frequency Analysis

目的:比较中国知网与百度学术中文献被引频次是否相同,为被引频次检索拓展可能的检索工具提供依据。方法:以《昆明医科大学学报》2013年发表的论文作为对象,采取随机抽样方法,抽取586篇中200篇期刊论文(34.1%),剔除稿约、医院介绍等非学术论文7篇,剩下193篇,然后分别在中国知网和百度学术查找这些论文的被引频次,作配对t检验,比较两网站数据是否有差异。结果:193篇论文的平均被引频次分别为1.53±2.14次(中国知网),1.17±1.60次(百度学术),两者差异有统计学意义(P<0.05)。百度学术的被引频次与中国知网的差异不大。结论:与中国知网的被引频次相比,中国知网和百度学术可以共同成为我们文献检索工具。

Objective:To compare cited frequencies of Chinese academic literature in the Chinese National Knowledge Infrastructure(CNKI)and Baidu Academic,exploring a new tool for retrieval of cited frequencies of academic literature.Method:Included in the study were papers published in"Journal of Kunming Medical University"in 2013.Simple random sampling was used to select 200 out of 586 journal papers(34.1%).Seven non-academic works were excluded on instructions for authors,advertisements for hospitals,etc.The number of the remaining papers was 193.Both CNKI and Baidu Academic were used to search for cited frequencies of these papers.Pairing t test.comparison and analysis were performed.Results:The cited frequencies of 193 academic papers in CNKI and Baidu Academic were 1.53±2.14 and 1.17±1.60,respectively.The difference was statistically significant(P<0.05).Baidu's academic citation frequency is not different from that of CNKI.Conclusion:Compared with cited frequencies of Chinese Literature in CNKI and Baidu scholarship can become our literature search tools together.