Several faults in the improved NS model using two examples is pointed out and also another single lane traffic CA model by introducing vehicle_moving_status variable and feedback rule is proposed.

通过两种情况列出了改进的NS模型存在不尽周严的地方，随之在新模型中引入了行车状态变量和反馈规则，从而控制车辆出现倒车和刹车过急等现象。

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Closed loop feedback adopts PID control rule to insure the stabilization of magnification times.

闭环反馈采用PID这种最广泛使用的控制规律，以保证放大倍数的稳定。

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A good rule of thumb is at least 99% feedback on more than 500 transactions.

一个好的经验法则是至少99 500种以上的交易%的反馈。

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