数学建模竞赛入门与提高-畅读网

　　　　

数学建模竞赛入门与提高

作者：邬学军

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内容简介:

《数学建模竞赛入门与提高》是为帮助各类本专科院校大学生参加全国大学生数学建模竞赛而编著的培训指导用书。是作者在使用多年的指导培训讲义基础上修订而成。内容包括（暂定）：数学建模竞赛入门指导；预测模型及相关程序；运筹优化模型及程序实现；评价模型及程序实现；概率模型；统计模型；全国大学生数学建模竞赛专题。

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SHOW FULL COLUMNS FROM `ls_nav` [ RunTime:0.029962s ]
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SHOW FULL COLUMNS FROM `ls_friendly_link` [ RunTime:0.015669s ]
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SELECT `id`,`name` FROM `ls_goods_category` WHERE `id` = 46 LIMIT 1 [ RunTime:0.002218s ]
SELECT `a`.*,`ap`.`width`,`ap`.`height` FROM `ls_ad` `a` INNER JOIN `ls_ad_position` `ap` ON `a`.`pid`=`ap`.`id` WHERE `pid` = 11 AND `ap`.`client` = '2' AND `a`.`status` = '1' AND `a`.`del` = '0' AND `ap`.`status` = '1' AND `ap`.`del` = '0' ORDER BY `sort` DESC,`id` DESC [ RunTime:0.002169s ]
SELECT `a`.*,`ap`.`width`,`ap`.`height` FROM `ls_ad` `a` INNER JOIN `ls_ad_position` `ap` ON `a`.`pid`=`ap`.`id` WHERE `pid` = 14 AND `ap`.`client` = '2' AND `a`.`status` = '1' AND `a`.`del` = '0' AND `ap`.`status` = '1' AND `ap`.`del` = '0' ORDER BY `sort` DESC,`id` DESC [ RunTime:0.005882s ]
SELECT * FROM `ls_goods` WHERE `del` = 0 AND `status` = 1 AND `create_time` <= 1775800976 ORDER BY `create_time` DESC LIMIT 5 [ RunTime:2.164585s ]

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