用BP网络建立映射关系，为遗传算法提供适应度函数，通过改进遗传算法完成最小值优化-the mapped relation is built using BP network in order to provide fitness function for genetic algorithm. At last, optimization of minimum value is finished by genetic algorithm.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.010411s ]
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:0.087913s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001003s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001122s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000964s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003050s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000848s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003756s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015395s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001048s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 187736 [ RunTime:0.013125s ]
