开发环境ADS，
直流电机控制实验
掌握使用PWM方式控制直流电机的转动速度。-Development Environment ADS, DC motor control experiment to master the use of PWM control of DC motor rotation speed.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001357s ]
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:0.147025s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001671s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002167s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001575s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003998s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001218s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003358s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016381s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001532s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 157748 [ RunTime:0.001363s ]
