随着科学技术的迅猛发展，当今世界已进入一个信息横流、知识激增、情报爆炸的新时期，情报资料迅速增长。其增长的速度之快，累积的数量之多，更新的周期之短，简直令人目不暇接。情报信息在科研、生产中的作用也越来越重要。可令人遗憾的是，由于一些原因大量情报资料还没有 With the rapid development of science and technology, the world today has entered a new era of information flow, knowledge surge and intelligence explosion, and the intelligence information has been rapidly increasing. The speed of its growth, the cumulative number, the shortening of the renewal cycle, is simply dizzying. The role of intelligence information in scientific research and production is also more and more important. Unfortunately, for a number of reasons, a large amount of intelligence data is not available yet