So it has wide developing prospect. Based on an overall review of related papers published, this paper is devoted to the control strategies and control device of rope-less elevator driven by PMLSM.

本文在参阅了大量的参考文献的基础上，对永磁直线同步电动机无绳电梯控制装置和控制算法进行了深入的理论分析和应用研究。

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The local published technical papers related to metallurgical analysis written by Yunnan authors in 2006 are reviewed.

评述了云南分析工作者2006年期间在国内发表的有关冶金分析的研究论文。

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From 2005 until the end of 2009, researchers in the United States published 233, 787 scientific papers related to clean and alternative energy, representing a quarter of the global total.

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