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RightScale最近发布了他们的年度云报告(RightScale 2017云现状报告,RightScale 2017 State of the Cloud Report),这份报告包括了云计算在采用和实际使用方面的现状和趋势,并且与去年的结果进行了对比。 我们提取了这个调查报告的部分要点: 私有 阅读全文
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function_score Query function_score Query function_score Query function_score Query The function_score query is the ultimate tool for taking control o 阅读全文
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Ignoring TF/IDF Ignoring TF/IDF Ignoring TF/IDF Ignoring TF/IDF Sometimes we just don’t care about TF/IDF. All we want to know is that a certain word 阅读全文
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Query-Time Boosting Query-Time Boosting Query-Time Boosting Query-Time Boosting In Prioritizing Clauses, we explained how you could use the boost para 阅读全文
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For multiterm queries, Lucene takes the Boolean model, TF/IDF, and the vector space model and combines them in a single efficient package that collect 阅读全文
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Vector Space Model Vector Space Model The vector space model provides a way of comparing a multiterm query against a document. The output is a single 阅读全文