Through analyzing the dynamic and static characteristics, the author regulates system by using PID control strategy and uses Cut & Try method to adjust the parameters of PID controller.

在对系统的动静态性能分析的基础上，采用PID控制策略校正系统，运用试凑法整定PID控制参数。

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The charity and some MPs and peers are also concerned about government plans to abolish the office of chief coroner - a post introduced two years ago to try and reform the system and cut waiting times.

BBC: Call for coroner to resign over Teesside inquest delays

Beginning in September 2007, the Fed cut interest rates and took extraordinary steps to try to ease credit and shore up confidence in the banking system.

NPR: Transcripts Show Fed Underestimated Crisis In 2007