Based on the regulation law of immunity feedback response in biology, a compound path tracking control method is proposed for the problem existing in the non-time based approach of mobile robots.

针对移动机器人非时间参考控制方法的不足之处，借鉴生物免疫反馈响应过程的调节规律，提出了移动机器人的免疫非时间参考路径跟踪控制方法。

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These findings would not have surprised Charles Darwin, who in addition to theorizing on evolution in The Origin of the Species, also developed the Facial Feedback Response Theory, which suggests that the act of smiling actually makes us feel better (rather than smiling being merely a result of feeling good).

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It also means that as users react and provide feedback, the roles within the group become more defined in response to that feedback.

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But the protesters claim they have tried to answer such concerns, reorganising their camp "in response to feedback from the fire brigade".

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