This article discussed the incredible-range of search engine features based on the search engine valuation, and give out the method and steps of incredible-ranges calculation.
张秋霞,刘壮生. 试论网络检索工具检索性能的置信区间[J]. 现代图书情报技术, 2005, 21(6): 45-47.
Zhang Qiuxia,Liu Zhuangsheng. Study on Incredible-Range of Search Engine Features. New Technology of Library and Information Service, 2005, 21(6): 45-47.