一个关于BP网络的设计，实现一个函数的逼近，了解关于MATLAB神经网络工具箱的应用。-On the design of BP network, the realization of a function approaches, learn more about the MATLAB neural network toolbox applications.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001459s ]
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:0.118075s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001603s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002855s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001802s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.005903s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001477s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.005052s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014978s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001340s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 33595 [ RunTime:0.001375s ]
