In addition, some relevant problems about the spectrum sensing mechanism are studied with the emphasis on the adjustment and optimization of detection period.
另外，本文还研究了认知无线电的频谱检测机制问题，重点在于检测周期的调整和优化方面。
The oil and gas pipelines in our country have entered frequent accident period so it is important to conduct the research of pipeline internal detection.
当前我国油气管道已经进入事故多发期，开展管道内检测技术研究具有积极的现实意义。
Research in this paper is about the alternative rule of the axial force of supporting pole with different support height during the period of casting concrete through field detection.
本文通过现场检测实验，研究了不同高度支撑架内力随混凝土浇筑过程的变化规律。
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