Analyisis of Search Engines' Trustworthiness

如今，搜索引擎成为我们生活中不可或缺的，然而，搜索引擎的可信度尚不清楚。特别是搜索结果的数量，i。例如，点击数，通常变化约100至1000倍增加或减少，即使我们把它们相同的查询词。本研究通过对Google、Yahoo！日本和Bing此外，我们提出了一种新的方法来选择值得信赖的命中计数，这导致在99.5%的精度时，我们比较两个命中计数的点上的查询字有较大的搜索结果。

Nowadays, search engines become indispensable for us to live a life ; however, trustworthiness of search engines are unclear. Especially, the number of search results, i. e., hit-count, usually varies about 100 to 1000 times increase or decrease even if we put them the same query word. In this research, we have made clear the transition characteristics of hit-counts based on 15 months investigation for Google, Yahoo! JAPAN and Bing. Moreover, we have proposed a new method to choose trustworthy hit-counts, which results in 99.5% precision when we compare two hit-counts on the point which query word has larger number of search results.