利用matlab仿真系统的响应，通过对系统的反馈参数的设计比较其输出的不同，并且分析其稳定性。-using Matlab simulation system in response to the system through feedback from the design parameters to compare the different outputs and analysis of its stability.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001800s ]
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:0.081943s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002239s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002017s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003545s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.005004s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003158s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014271s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002284s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 3354 [ RunTime:0.001090s ]
