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中文摘要：
水下运动目标搜索是工程应用中急需解决的一个实际问题，在已知某一目标的可疑初始位置后，目标的航向、航速将随机变化且未知，搜索器按照哪种搜索方式才能有效实现对水下目标的搜索，其搜索概率随哪些因素变化，都是需要深入研究的问题。在建立了水下目标运动模型的基础上，以螺旋形搜索为例，建立了基于螺旋形搜索的水下目标搜索模型，并利用门特卡罗方法仿真分析了搜索器探测间距、水下目标运动速度和航向变化范围等因素对搜索器搜索概率的影响，为系统分析、比较各种水下目标搜索方法的搜索效能奠定了基础。
英文摘要：
It is a practical question of imperative settlement in the engineering application to search the submarine moving targets. In the situation of the known beginning positions of the doubtful targets and the random changing and unknown courses and moving velocities of submarine targets, according to which search mode that the searchers can effectively realize the search to the submarine targets, and which factors the search probability changes along with. Those are the questions of research thoroughly. Based on the setup of moving model of submarine targets, this paper builds the submarine targets search model based on the spiral search, taking the spiral search as the example. Simulate and analyze the influences of such elements as the detecting spacing of searchers, moving velocity of submarine targets and course variation range on the searching probability of the searchers, and lay the foundation for systematical analysis and comparison of the searching efficiency of all kinds of searching methods for submarine targets.
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