提供矩阵以及向量的各种运算，线性方程组的求解，二次曲面的插值和逼近，最小二乘法等数值分析计算工具-Provide a variety of matrix and vector operations, linear equations, quadratic surface interpolation and approximation, the least square method such as numerical analysis and calculation tools
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001366s ]
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:0.102127s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001443s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001972s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001312s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003588s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001081s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003433s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015490s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001488s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 111027 [ RunTime:0.001319s ]
