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:0.002089s ]
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:0.091166s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002500s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002394s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.004003s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002192s ]
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SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014907s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002713s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 34628 [ RunTime:0.001285s ]
