According to this, this paper focuses on the study of bearings-only passive tracking system in the aspects of the target location, time alignment and nonlinear filtering algorithm.
基于这样的背景，本文从目标定位、时间配准和非线性滤波算法三个方面对多站纯方位被动跟踪系统进行了研究和算法改进。
The present paper introduces the modal logic, and presents a new Information filtering algorithm based the study of formalization of knowledge and belief.
本文在介绍模态逻辑的基础上，提出了一种对知识和信念进行形式化研究的汉语信息过滤新算法。
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