中国物联网产业发展及应用实践（全彩）-畅读网

　　　　

中国物联网产业发展及应用实践（全彩）

作者：中国电子信息产业发展研究院

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计算机网络 >> 软硬件开发

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内容简介:

本书利用电动机的典型控制电气原理图，采用图文对照的介绍方式，把电动机在不同工况下所使用电路原理图的工作过程进行详细解读，使读者既了解掌握了所选用电路，又能举一反三地展开分析与其功能基本相同的电路图。本书主要内容包括规范电气图的基本知识，电动机基本电路，电动机正反转控制电路，电动机降压启动控制电路，电动机制动电路，电动机保护电路，电动机电子控制电路，智能化电动机控制与调速电路。

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SELECT `id`,`name` FROM `ls_goods_category` WHERE `id` = 3 LIMIT 1 [ RunTime:0.001254s ]
SELECT `id`,`name` FROM `ls_goods_category` WHERE `id` = 35 LIMIT 1 [ RunTime:0.001390s ]
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:0.001677s ]
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:0.002596s ]
SELECT * FROM `ls_goods` WHERE `del` = 0 AND `status` = 1 AND `create_time` <= 1751066293 ORDER BY `create_time` DESC LIMIT 5 [ RunTime:0.587694s ]

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