英德
有道
百度
谷歌
图片
维基
百科
搜索周期
hunting period
- 研究结果表明：采用所提出的中心偏离函数和时域削波方法相结合来搜索基音周期，能够有效地克服传统方法的不足，降低误判率，提高基音周期的估计精度。
The results show that the method using bias function and time-domain clipping to search pitch period can overcome shortcomings of the traditional, reduce false decision and raise the estimation precision. - 本文提出一种分区搜索算法，实现了相控阵雷达的自适应最优搜索.首先，研究了各区域平均发现一个目标消耗的雷达资源和目标被发现的平均时间同搜索帧周期以及目标强度的关系；然后，研究了在各区域采用两步搜索算法的最优参数设计，实现了局部区域的最优搜索；其次，在雷达时间资源有限和区域重要性加权的约束条件下，导出了使目标被发现的平均时间最小的区域最优帧周期；最后，讨论了分区搜索算法的自适应性.只要采用各区域的最优参数，按最优帧周期调度雷达波束，就可以自适应地实现使目标被发现的平均时间最短的波束的最优分布和扫描顺序，即自适应最优搜索.
In this paper，an optimal search strategy by dividing the whole surveillance area into regions is presented so that the optimal search can be adaptively implemented in phased array radar.Firstly，the inherent relationship among average discovering time，radar resources consumption，search frame period and target distribution density is studied.Secondly，parameters for the region search are optimized to achieve the optimal search performance inside regions.Then，the optimal search frame period for each region is derived to minimize the average discovering time of targets，where the constraint of radar time resource and the importance of each region are taken into account.Finally，the adaptability of this search strategy is discussed.Only if the optimal parameters for each region are utilized and the beams are scheduled according to the optimal frame period under the radar time constraint，the optimal distribution and the optimal scanning sequence of beams can be implemented adaptively.Thus，optimal search is adaptively implemented in the whole surveillance area. - 这是对天空的一次系统的搜索，目标是从某方向来的周期性的引力波，每次只分析一个方向。
This is a systematic search of the sky, one location at a time, for any periodic gravitational wave coming from that location.
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