按時間的導數 的英文怎麼說
中文拼音 [ànshíjiāndedǎoshǔ]
按時間的導數
英文
time derivative- 按 : Ⅰ動詞1 (用手或手指壓) press; push down 2 (壓住; 擱下) leave aside; shelve 3 (抑制) restrain...
- 時 : shí]Ⅰ名1 (比較長的一段時間)time; times; days:當時at that time; in those days; 古時 ancient tim...
- 間 : 間Ⅰ名詞1 (中間) between; among 2 (一定的空間或時間里) with a definite time or space 3 (一間...
- 的 : 4次方是 The fourth power of 2 is direction
- 導 : 動詞1. (引導) lead; guide 2. (傳導) transmit; conduct 3. (開導) instruct; teach; give guidance to
- 數 : 數副詞(屢次) frequently; repeatedly
- 時間 : time; hour; 北京時間十九點整19 hours beijing time; 上課時間school hours; 時間與空間 time and spac...
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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
本文提出一種分區搜索演算法,實現了相控陣雷達的自適應最優搜索.首先,研究了各區域平均發現一個目標消耗的雷達資源和目標被發現的平均時間同搜索幀周期以及目標強度的關系;然後,研究了在各區域採用兩步搜索演算法的最優參數設計,實現了局部區域的最優搜索;其次,在雷達時間資源有限和區域重要性加權的約束條件下,導出了使目標被發現的平均時間最小的區域最優幀周期;最後,討論了分區搜索演算法的自適應性.只要採用各區域的最優參數,按最優幀周期調度雷達波束,就可以自適應地實現使目標被發現的平均時間最短的波束的最優分佈和掃描順序,即自適應最優搜索This paper studied zero - velocity correct technology for ins, based on analysis of ins error equation, it concluded the method by which we can use ins velocity output to estimate the attitude angle error when the vehicle halted, then it contrasted two schemes of conic approximation of attitude angle error and put forward a method to decide the approximation coefficient by time range
本文首先研究了車載捷聯慣導系統( ins )的零速修正技術,在分析捷聯慣導系統誤差方程特點的基礎上,推導了停車時利用ins速度輸出估計姿態誤差角的方法,並對用二次曲線擬合姿態誤差角的兩種方案作了比較,提出了按時間分段確定擬合系數的方法。
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