摘要
由布拉德福(Bradford)定律发展而来的布鲁克斯(Brookes)图形法计算杏专业核心期刊时,由于杏专业属于农业类的狭窄专业,可采用的期刊实体样本空间狭小,因而会产生较大的系统误差,而在实际统计中,期刊实体增量十分有限,即短期内通常不会有大量的新增实体样本出现。本研究通过β图形辅助分析法得到了可靠的杏专业核心期刊布鲁克斯图形分界点,并利用这一分界点逆推得到布鲁克斯图形法误差修正系数。
Because apricot specialty is a narrow specialty in agriculture and the journal sample space used was narrow, the graphic method of Brookes developed from Bradford law was used to calculate apricot specialty central journal, resulted in bigger systematic error. In actual statistics, the increase quantity of journal entity was limited, namely the appearance of big increase of new entity samples was generally imposssible in short period. A dependable boundary point of brookes figure on apricot specialty central journal was reached from the method of β - curve supplemental analysis, And then a error correction coefficient of the graphic method of brookes was reached by backward inference from this point.
出处
《山东农业大学学报（自然科学版）》
CSCD
北大核心
2009年第4期609-614,共6页
Journal of Shandong Agricultural University：Natural Science Edition
基金
山东省农业科学院重大成果培育计划项目(2006YCG015)资助
关键词
杏专业
核心期刊
β图形
布鲁克斯
修正系数
Apricot specialty
central journal
β - curve
brookes
error correction coefficient
