Question

我已经创建了一个自定义相似度类，我希望Solr按coord()排名。在我的结果中，具有此调试查询结果的文档

 0.0 = (MATCH) weight(text:现在 in 0) [MyNewSimilarityClass], result of:
      0.0 = score(doc=0,freq=1.0 = termFreq=1.0
         ), product of:
        0.0 = queryWeight, product of:
          0.0 = idf(docFreq=103081, maxDocs=4060152)
          0.0 = queryNorm
        0.0 = fieldWeight in 0, product of:
          0.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          0.0 = idf(docFreq=103081, maxDocs=4060152)
          1.0 = fieldNorm(doc=0)
  1.43425728E8 = coord(2/167)

排名高于具有此调试查询结果的文档

 0.0 = (MATCH) weight(text:中国 in 5) [MyNewSimilarityClass], result of:
      0.0 = score(doc=5,freq=1.0 = termFreq=1.0),
        product of:
        0.0 = queryWeight, product of:
          0.0 = idf(docFreq=39366, maxDocs=4060152)
          0.0 = queryNorm
        0.0 = fieldWeight in 5, product of:
          0.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          0.0 = idf(docFreq=39366, maxDocs=4060152)
          1.0 = fieldNorm(doc=5)
  8.9641069E8 = coord(5/167)

除了coord()因素之外，两者都是平等的，为什么它不会将排名较高的coord()因子排在第一位？

Answer 1

由于您的其他评分因子为零，因此两个文档的总分为零/ 0（这是首先显示的值）。评分（主要）是每个术语的产物（而不是添加剂）。

请参阅Lucene's Practical and Conceptual Scoring Formula。

为什么Solr没有按最大相似系数排名？

1 个答案: