presented target area 中文意思是什麼
presented target area
解釋
目標有效面積-
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 -
A game context was provided to children in which three rectangles, which indicated a box full of black and white toy bricks, was presented on the test paper. at the same time one another rectangle, which indicated picture of a box full of black and white toy bricks, was presented on a large wall map. the black area in all of these rectangles was given a corresponding rate and the children were required to choose one rectangle in three options to match the rate with target rectangle
實驗提供給兒童一個游戲情境，在測驗紙上呈現三個被指示為「裝滿黑色積木和白色積木的盒子」的長方形，同時用掛圖呈現一個被指示為「盒子照片」的長方形，其中的黑色部分都對應一個比例，要求兒童在三個選項中選擇一個和目標圖形比例相匹配的圖形。 -
An elevations selection approach of area target surveillance task using multi - satellites is presented
摘要提出了多顆成像衛星對某一區域目標進行觀測的側擺方案優化方法。
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