网络信息资源的老化规律研究——以网络引文的可追溯性为视角

Study on Obsolescence of Web Information Resources： A Perspective form the Traceability of Web Citations

从网络引文的可追溯性角度研究网络信息资源的老化规律。具体分析CSSCI（1998-2009年）的183986条P（Print）-W（Web）网络引文，发现各年网络引文量呈逻辑增长，篇均引文量也呈逐年增长趋势，其中近一半（48％）的P—W引文不可追溯。在不可追溯的引文类型中，404所占比例最大；通过引入传统文献老化规律模型——负指数增长曲线分析，P—W网络引文的平均可追溯半衰期为7．13年。P—W网络引文可追溯性与其URL域名类型、URL网页类型、URL层数和年代等的关系方面，P—W引文不可追溯分布具有一定的规律性；URL层数与URL字符数之间具有显著线性相关关系。

We study the obsolescence of network information resources based on the traceability of Web citations, we analysis 183 986 Web citations in CSSCI （1998 -2009） , and find that the amount of citations has the logical growth each year, which nearly half （48 % ） of citations are non-retroactivity, the 404 type has largest proportion in the citations of non- retroactivity ; introducing an aging model of the traditional literature-the negative exponential growth curve, the average Web citation half-life is 7.13 years. The traceability of Web citations has some relation with in URL domain type, each year of the change, the URL page type. There are a significant linear correlation between the URL layers and URL characters.