【摘要】 欲从我国科技期刊获得某学科的全部信息必须检索的刊种数是核心期刊的16倍。各类目期刊信息涉及刊种数在168—1228种范围内。相关学科期刊与本学科期刊的刊种比接近2.0.核心期刊信息相对集中程度为38—70%。更多还原

【Abstract】 If acquiring all the information of a discipline from China’s scientificand technical journals,the number of journal titles which have to be searc-hed is 16 times of that of core journals.The information of a discipline areinvolved in 168-1228 titles of journals.The journal titles of the related dis-ciplines and the discipline are in a ratio of about two to one.The relative co-ncentration degree of the information in the core journals is 38-70%.更多还原