DS18B20测温程序，很经典的算法，时序问题通过FOR循环的延迟实现-DS18B20 measurement procedures, it is the classic algorithm, timing of the problem through the FOR cycle delay implementation
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001304s ]
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:0.086393s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001181s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001128s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003751s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000957s ]
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SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014387s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001226s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 152597 [ RunTime:0.001205s ]
