山楂专业载文核心期刊布鲁克斯误差分析与修正  

The Analysis and Correction of Brookes Error for Whitethorn Specialty Central Journal

作　　者：孙洪雁[1] 马青[2] 

机构地区：[1]山东省果树研究所,泰安271000 [2]泰山学院图书馆,泰安271021

出　　处：《图书情报工作》2009年第18期66-69,95,共5页Library and Information Service

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.

关 键 词：山楂专业 核心期刊 β图形 布鲁克斯 修正系数 

分 类 号：G353[文化科学—情报学]