1引言据有关研究,以科技期刊为载体的科技文献在整个文献源中占有绝对重要的地位。它所提供的情报占全部科技文献的80%—87%以上。同时,随着文献的急剧增加,期刊也同步增长。据统计,全世界每年出版期刊已达15万种左右,80年代比50年代增加了50%。以地震科学为例,全世界每年出版与地震有关的期刊约千余种。我国专指性地 1 Introduction According to relevant research, scientific and technical literature based on sci-tech periodicals occupy an absolutely important position in the entire document source. It provides intelligence accounts for 80% -87% of all scientific literature. At the same time, with the rapid increase of literature, journals also grow simultaneously. According to statistics, there are about 150,000 journals published in the world each year, an increase of 50% over the 1980s in the 1980s. Taking earthquake science as an example, there are about 1,000 kinds of journals related to earthquakes published every year in the world. My country specifically refers to