有一个机遇DCT域的数字水印算法，里面有详细的注释说明，可以拿来研究-This is a DCT watermarking algorithm attached with detailed comments and explanation, which can be used for research purpose.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001244s ]
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:0.089482s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001119s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001939s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001191s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003716s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000956s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003430s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015609s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001307s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 3055 [ RunTime:0.001259s ]
