利用有限差分算法编写的三维迭后偏移的代码，算法精度高，结果很理想。-Prepared by using three-dimensional finite difference algorithm Diego after the offset of the code, algorithms, high precision, the result very satisfactory.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001075s ]
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:0.001113s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001828s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001132s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003478s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001046s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003119s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014733s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001335s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 229901 [ RunTime:0.001151s ]
