一个控制系统中离散系统的模拟和结果演示，其中有Matlab运行结果图。-a discrete control system simulation system and the results of the demonstration, including Matlab running results map.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001225s ]
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:0.090212s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000966s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001365s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003169s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000862s ]
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SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014720s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001227s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 34628 [ RunTime:0.017219s ]
