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For life goes not backward nor tarries with yesterday.

因为生命不会倒转，也不会驻足昨日。

For life goes not backward nor tarries with yesterday.

因为生命不会倒流，也不会驻足在昨日。

For life goes not backward nor tarries with yesterday.

因为生命不会倒退也不会停留在昨日。

For life goes not backward nor tarries with yesterday.

因为生命不会后退，也不在过去停留。

For life goes not backward nor tarries with yesterday.

因为生命既不能逆转，也不会驻足于昨天。

Life goes not backward nor tarries with yesterday.

因为生命无法倒流，也不会滞留昨日。

For life goes not backward nor tarries with yesterday.

因为生命不会倒回也不会被昨日延迟。

For life goes not backward nor tarries with yesterday.

你们可以努力去模仿他们，却不能使他们来象你们。

For life goes not backward nor tarries with yesterday.

因为人生没有回头路，不会为昨日逗留。

For life goes not backward nor tarries with yesterday.

因为生命不会倒行，也不会滞留于往昔。

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。