比较均匀量化和A律13折线编码的信号量噪比，通过比较可以看出两者的区别。但不知道正不正确-A law more uniform quantitative and broken line 13 the amount of coded signal to noise ratio, can be seen by comparing the difference between the two. But do not know is not correct
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002077s ]
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:0.091257s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002343s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002144s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002190s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003685s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002217s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003540s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015417s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002679s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 19346 [ RunTime:0.001470s ]
