计算图像直方图的统计特征，包括均值，方差，熵，三阶矩等。-image histogram calculated the statistical characteristics, including mean, variance, entropy, such as third-order moments.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001516s ]
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:0.124404s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001471s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002073s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002009s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003869s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.010809s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.007752s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.023150s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001518s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 202853 [ RunTime:0.014612s ]
