清华校友论文选集(1-3卷）（全彩）-畅读网

　　　　

清华校友论文选集(1-3卷）（全彩）

作者：姜俊平

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mobi/epub/pdf/awz3

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科学技术 >> 医学/建筑

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内容简介:

本文集收录了清华大学土木系1954—1959届部分校友的近几十年的著作及论文一百余篇，涉及振动理论、线性系统理论、系统辨识、反馈控制振动的隔振、防静电地板电阻控制分析、工民建、结构设计等领域，对高等院校力学、土建专业的本科生研究生，以及相关领域设计科研院所的研究人员具有重要的参考价值和收藏价值。

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SELECT `id`,`name` FROM `ls_goods_category` WHERE `id` = 47 LIMIT 1 [ RunTime:0.018950s ]
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:0.009398s ]
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:0.009013s ]
SELECT * FROM `ls_goods` WHERE `del` = 0 AND `status` = 1 AND `create_time` <= 1776216300 ORDER BY `create_time` DESC LIMIT 5 [ RunTime:1.071061s ]

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