Overall risk management is to control in a systematic and dynamic way to decrease the uncertainties in the process of projects.

全面风险管理就是用系统的、动态的方法进行控制，以减少项目过程中的不确定性。

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The problem of guaranteed cost control for a class of uncertain time-delayed systems was addressed. The uncertainties existed both in the systematic matrix, and in the controller gain.

研究了一类不确定时滞系统的保性能控制问题，其不确定性不仅存在于系统矩阵，而且存在于控制器的增益中。

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However, due to lacking of systematic research, it has not been clear that how sub-health happened and how to cure it, there are a lot of difficulties and uncertainties for us to cure sub-health.

但由于其系统研究的不足，亚健康状态产生与治疗机制尚未明确，在亚健康的治疗上仍然存在许多困难和未知。

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