先进PID仿真程序，里面有很多先进PID的仿真程序，对于学习PID控制的初学者来说肯定非常有用-Advanced PID simulation program, which has many advanced PID simulation program, PID control, for learning will definitely be very useful for beginners
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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:0.089394s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001099s ]
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SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000989s ]
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