例句與造句

1. The reasoning of rapid acquisition algorithm for pulse timingover frame period in uwb communications
   通信幀內(nèi)脈沖時位快速捕獲算法的公式推導
2. 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
   本文提出一種分區(qū)搜索算法，實現(xiàn)了相控陣雷達的自適應最優(yōu)搜索.首先，研究了各區(qū)域平均發(fā)現(xiàn)一個目標消耗的雷達資源和目標被發(fā)現(xiàn)的平均時間同搜索幀周期以及目標強度的關系；然后，研究了在各區(qū)域采用兩步搜索算法的最優(yōu)參數(shù)設計，實現(xiàn)了局部區(qū)域的最優(yōu)搜索；其次，在雷達時間資源有限和區(qū)域重要性加權的約束條件下，導出了使目標被發(fā)現(xiàn)的平均時間最小的區(qū)域最優(yōu)幀周期；最后，討論了分區(qū)搜索算法的自適應性.只要采用各區(qū)域的最優(yōu)參數(shù)，按最優(yōu)幀周期調(diào)度雷達波束，就可以自適應地實現(xiàn)使目標被發(fā)現(xiàn)的平均時間最短的波束的最優(yōu)分布和掃描順序，即自適應最優(yōu)搜索
3. It's difficult to find frame period in a sentence. 用frame period造句挺難的