摘要
由布拉德福(Bradford)定律发展而来的布鲁克斯(Brookes)图形法计算山楂专业核心期刊时,由于山楂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,即短期内不可能有大量的新增实体期刊样本出现。本研究通过β图形辅助分析法得到可靠的山楂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 whitethorn specialty is a narrow specialty in agriculture, the journal sample space used was narrow, the graphic method of Brookes developed from Bradford law was used to calculate whitethorn 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 journal samples was 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 an error correction coefficient of the graphic method of Brookes was reached by backward inference from this point.
出处
《图书情报工作》
CSSCI
北大核心
2009年第18期66-69,95,共5页
Library and Information Service
关键词
山楂专业
核心期刊
β图形
布鲁克斯
修正系数
whitethorn specialty central journal β -curve Brookes error correction coefficient
