Firstly, this paper analyzes the Change process of Zhengzhou city since the beginning of the 20th Century, that is, the stage of stagnancy, starting, expansion, accelerating etc.

本文分析了郑州市20世纪初以来的城市演变过程，归纳出四个阶段，即停滞、起步、扩张和加速阶段；

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To realize the auto-leveling control of draw frame during its start and stop process, a premise to solve this problem is to keep a steady speed change during the accelerating and decelerating process.

为解决并条机启、停过程的自调匀整控制，关键要实现启停机加减速过程的平稳变速。

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Creating within your organization a system and process for recognizing change and accelerating action is the best defense against being caught by surprise.

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But in the meantime the process continues, and climate change may ultimately put restoration hopes out of reach by accelerating sea level rise.

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