现在,全世界每年发表的科学论文达一百多万篇,各学科之间又出乎意料地互相渗透,因而,科技情报工作迫切需要更多更好的检索工具。历来的检索工具可以分为两大类:分类索引和对象索引(例如主题索引和作者索引等)。这两类索引都存在着一个共同的固有的矛盾,就是编索引的人和 Nowadays, more than one million scientific papers are published each year in the world, and among them, they unexpectedly penetrate each other. Therefore, more and better search tools are urgently needed in scientific and technological intelligence work. Historically, search tools have been divided into two broad categories: category indexes and object indexes (such as subject indexing and author indexing). There is a common inherent contradiction between the two types of indexes, namely, the indexed person and