目标跟踪中的全局最小二乘算法，通过做多次蒙德卡诺试验获得其二阶距性能估计-Target tracking in the overall least-squares algorithm, through so many tests蒙德卡诺performance from its second-order estimates
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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:0.069729s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001212s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001048s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003106s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000930s ]
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SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001175s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 234231 [ RunTime:0.021569s ]
