矩阵计算，包括了矩阵的加减乘除，还可以实现对角化，对一次解方程组非常有帮助-computing in matrixs,It Includes the plus and multiply and so on,It can realize the diagonalize,that will be very helpfull for one result equation
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001140s ]
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:0.087669s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001101s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001793s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001130s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003648s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000961s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003106s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014174s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001243s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 311204 [ RunTime:0.001348s ]
