用单纯形法求解线性规划最优解，能输出求解过程中产生的单纯形表，并输出最优解-Simplex method for solving linear programming optimal solution, can solve the output generated in the process of simplex tableau, and output the optimal solution
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.000867s ]
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:0.086178s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000936s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001136s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000915s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003126s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000797s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003676s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014341s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001113s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 5339 [ RunTime:0.016200s ]
