其次研究了非连续频谱感知策略的优化设计问题，即在满足感知开销限制的条件下，如何最小化空闲频谱发现时间。
Secondly, the optimal design of discontinuous spectrum sensing scheme was studied, which aimed at minimizing the spectrum opportunities discovery time while satisfying the sensing overhead constraint.
根据这篇文章的观点，由于植物无法逃离危险，所以将能量投入到能够识别威胁并感知疼痛的身体系统中，是一个非常糟糕的进化策略。
Plants can't run away from danger, so investing energy in a body system which recognizes a threat and can feel pain would be a very poor evolutionary strategy, according to the article.
本文以目标跟踪为应用背景，改进了已有传感器感知模型和虚拟力方法，提出了一种新的传感器网络布局优化策略。
Improving on the existing sensor detection model and virtual force method, we present a novel sensor deployment optimization strategy based on target involved virtual force.
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