产业

Closely track the industry, schools, industries, enterprises and regional economic development needs, and carry out real tasks as the carrier of the engineering training model combining the reform of school characteristics with the formation of a "combination of engineering, the Dow Arts with a minor in" talent cultivation mode, On this basis, professional explored the distinctive characteristics of the "learning work alternately,""Ding Gang internships" and "order-type training" and other engineering models with educating people.

学校紧紧跟踪行业、产业、企业和区域经济发展需求，进行以真实工作任务为载体的工学结合人才培养模式改革，形成了具有本校特色的&工学结合、道艺兼修&的人才培养模式，在此基础上，各专业探索了特色鲜明的&学工交替&、&顶岗实习&、&订单式培养&等工学结合育人模式。

Tangshan Phoenix New Area is the prime district of Tangshan with the best geology structure of the center of the city and Tangshan is located in the Bohai Sea region-the "Bo Triangle" central district constituted by Jing-Jin-Ji, Liaotung Peninsula and the Jiaodong Peninsula.

凤凰新城是唐山的钻石地段，是具有市中心区最好地质结构的黄金宝地，而唐山市地处环渤海地区，京津冀、辽东半岛、胶东半岛所构成的&渤三角&中心地带，有着强大港口、能源、产业、物流体系的支撑，是环渤海核心区域中交通便捷、最具潜能、有着广阔发展前景的投资热土。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。