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Larry的数学学习笔记(11)

2026-02-07 04:14:06

Larry的数学学习笔记(11)

满秩分解可以降低计算复杂度，相比于SVD奇异值分解，它是计算量简单的一种矩阵分解

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基本文件流程错误 SQL 调试

请求信息 : 2026-02-07 05:53:26 HTTP/2.0 GET : https://67808.cn/a/464143.html
运行时间 : 0.259898s [ 吞吐率：3.85req/s ] 内存消耗：4,394.02kb 文件加载：140
缓存信息 : 0 reads,0 writes
会话信息 : SESSION_ID=9d04dbb8fc339cf0cd4e8b06986053c9

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CONNECT:[ UseTime:0.000916s ] mysql:host=127.0.0.1;port=3306;dbname=no_67808;charset=utf8mb4
SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001678s ]
SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.003987s ]
SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000713s ]
SHOW FULL COLUMNS FROM `set` [ RunTime:0.001519s ]
SELECT * FROM `set` [ RunTime:0.002954s ]
SHOW FULL COLUMNS FROM `article` [ RunTime:0.001578s ]
SELECT * FROM `article` WHERE `id` = 464143 LIMIT 1 [ RunTime:0.001603s ]
UPDATE `article` SET `lasttime` = 1770414806 WHERE `id` = 464143 [ RunTime:0.022969s ]
SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.004357s ]
SELECT * FROM `article` WHERE `id` < 464143 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.004659s ]
SELECT * FROM `article` WHERE `id` > 464143 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001151s ]
SELECT * FROM `article` WHERE `id` < 464143 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.020130s ]
SELECT * FROM `article` WHERE `id` < 464143 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.009973s ]
SELECT * FROM `article` WHERE `id` < 464143 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.011192s ]

0.263929s

ShowPageTrace