When a user performs a search, the search engine must not only filter a set of pages that are relevant to the query, but also rank (order) them from best to worst.
当用户执行搜索时，搜索引擎不仅要过滤的网页查询相关的设置，但也排名(顺序)他们从最好到最差。
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Methods By analyzing the adaptive optimization algorithm of weight order statistic filter, the adaptive optimization algorithm for rank selection filter has been derived.