清华大学数学建模讲义,对于喜欢数学的人非常有用。利用数学模型解决实际问题。-Tsinghua University, mathematical modeling notes, for those who like mathematics very useful. The use of mathematical models to solve practical problems.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002713s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.144754s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.003042s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.003002s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.006227s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.003849s ]
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SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.003300s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 120148 [ RunTime:0.001579s ]
