本实验先利用Mathematica求解非线性方程（组）,探索不动点、分形的性质.-In this study, the first use of Mathematica for solving nonlinear equations (group), explore the fixed point, fractal nature.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001374s ]
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:0.092191s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001289s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001938s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001277s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003745s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001087s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003292s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.021781s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002246s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 10446 [ RunTime:0.001669s ]
