采用数据结构中的AOE方法对图的关键路径进行计算，此算法摘录了课本中的算法-using the data structure to map AOE method of calculation of critical path, this algorithm extracts from the books of Algorithm
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001956s ]
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:0.086796s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001110s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001498s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001033s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003520s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001023s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.004422s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015055s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001229s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 320310 [ RunTime:0.013697s ]
