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:0.018829s ]
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:0.129166s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000926s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001107s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001464s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.008337s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001747s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.007073s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.025735s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001143s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 202853 [ RunTime:0.076259s ]
