仓库选址问题算法，在公路上选择一个位置xp建立仓库，使得仓库为超市供货的总费用最小。-Warehouse location problem algorithm, select a location on the highway xp setting up a warehouse, allowing warehouse supermarket minimize the total cost of supply.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.000961s ]
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:0.082824s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.020888s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001039s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.002983s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000886s ]
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SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002463s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 279066 [ RunTime:0.015801s ]
