Initialize U=[uij] matrix, U(0)
At k-step: calculate the centers vectors C(k)=[cj] with U(k)
Update U(k) , U(k+1)
If || U(k+1) - U(k)||< then STOP otherwise return to step 2.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001084s ]
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:0.087382s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001056s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001155s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000948s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003249s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.011296s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.014363s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016608s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001264s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 354813 [ RunTime:0.030375s ]
