所用的电路为蔡氏电路和锁相环电路。

The circuits used are Chua 'circuit and phase lock loop.

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对比研究了不同退火温度对贝氏体球铁辊环组织和硬度的影响，提出了贝氏体球铁辊环合适的退火温度。

The influences of different annealing temperature on the structure and hardness was compared and investigated. The proper annealing temperature for the bainite nodular iron roller ring was proposed.

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在第二章，研究了随机环镜中的马氏链的弱常返性，给出了弱常返性的一个充分条件。

In the second chapter, we study weakly recurrence of the Markov in random environment, and provide the sufficient condition for weakly recurrence.

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