根据最小二乘法的递推公式 ，由 ，逐次递推可得。程序中选取矩阵来存放x的值。通过循环程序计算出 ， ， 的值-According to the recursive least squares formula, by, successive recursive available. Process to select the matrix to store the value of x. Calculated through the cycle process, the value of
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001038s ]
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:0.075386s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001109s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001133s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001002s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003108s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000870s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003648s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014836s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001455s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 8243 [ RunTime:0.015991s ]
