相关性（relevance）_威海佰年网络技术有限公司_网站建设_软件开发_私有云_商标注册_公众号_小程序_APP_物联网_ChatGPT

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相关性（relevance）

威海seo术语威海相关性
1532

相关性指的是事物之间的关联程度或相似程度。在信息检索中，相关性通常描述了查询与搜索结果之间的匹配程度或相关性程度。一般来说，相关性越高，搜索结果越符合查询的意图，而反之则越不相关。相关性的评估通常由算法和模型来实现，例如TF-IDF、BM25等算法。

Public @ 2023-06-15 15:00:08

要害词密度（keyworddensity）

要害词密度（KeywordDensity）与要害词频率（KeywordFrequency）所论述的实质上是同一个概念，用来测量要害词在网页上呈现的总次数与其他文字的份额，一般用百分比表明，相关于页面总字数而言，要害词呈现的频率越高，要害词密度也就越大。

Public @ 2010-07-01 15:51:49

竞价排名

威海seo术语威海竞价排名
1241

为每个查找引擎举荐向查找引擎付出发费用，用以确保在付费查找成果的排名，其最简略的方法，付费查找成果显现出价最高一方的网页链接在成果列表的顶端，而且竞标方每次在访客点击竞标方的链接时付钱给查找引擎

Public @ 2013-10-05 15:51:39

相关性（relevance）

威海seo术语威海相关性
1571

的几个最佳的衡量标准？ 1. 精准度（Precision）：搜索结果中相关文档占搜索结果总样本量的比例，表示搜索系统找到的有效结果占全部结果量的比例。 2. 召回率（Recall）：搜索结果覆盖率，代表找到的相关文档占搜索样本总量的比例。 3. 覆盖率（Coverage）：搜索结果的评价指标，表示搜索结果中所包含的词或句子，占搜索引擎所拥有的整个语料库的比例。 4. 时效性（Timelin

Public @ 2023-02-24 16:48:28

相关性（relevance）

威海seo术语威海相关性
2123

一个天然查找与查找恳求相关的程度，一个有极高相关性的匹配是对那个查找恳求排名榜首的候选成果，查找引擎一般运用相关性排名算法，来展现查找成果，相关性排名算法运用多种要素，包含匹配查找恳求内容所在网页的方位，网页的权威性（依据链接剖析），查找恳求中的词语在网页上互相的挨近程度，以及更多其他的。

Public @ 2011-08-22 15:51:37

更多您感兴趣的搜索

基本文件流程错误 SQL 调试

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[ DB ] CONNECT:[ UseTime:0.000360s ] mysql:dbname=briline;host=127.0.0.1;port=3306;charset=utf8
[ SQL ] SHOW COLUMNS FROM `ob_article` [ RunTime:0.000606s ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 8957 LIMIT 1 [ RunTime:0.000352s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'partitions' => NULL, 'type' => 'const', 'possible_keys' => 'PRIMARY', 'key' => 'PRIMARY', 'key_len' => '4', 'ref' => 'const', 'rows' => 1, 'filtered' => 100, 'extra' => NULL, ) ]
[ SQL ] select * from `ob_article_tongji` where category_id=12 and mark_type='cate' order by times desc limit 15 [ RunTime:0.000506s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'partitions' => NULL, 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, 'filtered' => 1.0000001192092896, 'extra' => 'Using where; Using filesort', ) ]
[ SQL ] select * from `ob_article_tongji` where category_id=12 and mark_type='tags' order by times desc limit 100 [ RunTime:0.000588s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'partitions' => NULL, 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, 'filtered' => 1.0000001192092896, 'extra' => 'Using where; Using filesort', ) ]
[ SQL ] select * from `ob_article_tongji` where category_id=12 and mark_type='tags' order by rand() limit 30 [ RunTime:0.000754s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'partitions' => NULL, 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, 'filtered' => 1.0000001192092896, 'extra' => 'Using where; Using temporary; Using filesort', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 8957 LIMIT 1 [ RunTime:0.000235s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'partitions' => NULL, 'type' => 'const', 'possible_keys' => 'PRIMARY', 'key' => 'PRIMARY', 'key_len' => '4', 'ref' => 'const', 'rows' => 1, 'filtered' => 100, 'extra' => NULL, ) ]
[ SQL ] update `ob_article` set views=views+1 where id=8957 [ RunTime:0.004276s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `cate` = '威海seo术语' AND `status` <> -1 LIMIT 1 [ RunTime:0.006251s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'partitions' => NULL, 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 7784, 'filtered' => 0.89999997615814209, 'extra' => 'Using where', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `category_id` = 12 AND `cate` = '威海seo术语' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.018547s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'partitions' => NULL, 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 7784, 'filtered' => 0.89999997615814209, 'extra' => 'Using where; Using temporary; Using filesort', ) ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `tags` = '威海相关性' AND `status` <> -1 LIMIT 1 [ RunTime:0.006121s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'partitions' => NULL, 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 7784, 'filtered' => 0.89999997615814209, 'extra' => 'Using where', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `category_id` = 12 AND `tags` = '威海相关性' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.017725s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'partitions' => NULL, 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 7784, 'filtered' => 0.89999997615814209, 'extra' => 'Using where; Using temporary; Using filesort', ) ]

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