广义洛特卡分布特征参数的稳定性研究——以《情报理论与实践》为例  

Research on the Stability of Characteristic Parameters of Generalized Lotka’s Distribution

作　　者：陈道兰[1] 

机构地区：[1]重庆文理学院图书馆,重庆402160

出　　处：《情报理论与实践》2014年第8期28-31,共4页Information Studies:Theory & Application

基　　金：重庆文理学院校级重点科研项目"我国档案学博硕论文聚类分析"的研究成果之一;项目编号:NO.Z2012TS02

摘　　要：文章以《情报理论与实践》为例,分别通过固定统计初始时间、按不同统计时间跨度和固定统计时间跨度、按不同统计初始时间两种方法采集著者数据,研究了广义洛特卡分布特征参数随不同统计时段的稳定性。研究结果表明,两种不同统计方法得到的《情报理论与实践》不同时段的著者数据均服从广义洛特卡分布,但其特征参数随统计时间长度呈现出先快速减少,然后逐渐趋于稳定的规律;从参数稳定性来看,统计时间跨度越长,参数变动幅度越小。研究表明广义洛特卡分布特征参数只是统计意义下的常数,其值围绕某个值波动。Taking the journal of “Information Studies ： Theory ＆ Practice （ITA） ”as an example, this paper researches on the stability of characteristic parameters of generalized Lotka＇s distribution with different statistical period through two different methods to select author data, which are the fixed statistical initial time with different statistical time span and the fixed statistical time span with different statistical initial time. The research results show that the author data of ITA in different period based on two different statistical methods follow the generalized Lotka＇s distribution. However, the characteristic parameters present rapid decrease and then stabilized with the length of statistical time. That is, the longer the statistics time span, the narrower the range of charcteristic parameter changes. The research shows that characteristic parameters of generalized Lotka＇s distribution is only a statistical constant, its value fluctuate around a certain constant.

关 键 词：洛特卡分布 特征参数 稳定性 初始时间 时间跨度 

分 类 号：G350[文化科学—情报学]