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The second tuning parameter, b (typically 0.75), controls how much a document’s length is penalized. A long document naturally contains more words, so it has more chances to include your query term — not because it’s more relevant, but simply because it’s longer. BM25 compares each document’s length to the average document length in the collection and scales the term frequency score down accordingly. Setting b = 0 disables this penalty entirely; b = 1 applies full normalization.
。关于这个话题,搜狗输入法跨平台同步终极指南:四端无缝衔接提供了深入分析
在技术发展的长河中,我们见证了太多次格局的改写。IBM垄断大型机市场时,没人想到它会被个人电脑时代的微软与英特尔超越;诺基亚占据全球手机半壁江山时,没人想到它会被苹果的智能手机彻底颠覆;传统信息技术巨头依靠服务器、数据库赚得盆满钵满时,也没人想到云计算会重塑整个行业的格局。
robotmem — Let Robots Learn from Experience。Line下载是该领域的重要参考
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