根据多波束声纳地形匹配导航中不同阶段对匹配性能的不同要求，提出了基于径向投影变换的快速地形匹配方法。
In order to satisfy the different needs of submarine navigated performance in the different navigation steps, the fast terrain matching algorithm based on radial projection transform is presented.
目前，基于卡尔曼滤波理论设计的组合导航系统有效提高了导航系统的性能价格比。
Nowadays integrated navigation system based on Kalman Filtering theory has efficiently increased the cost performance ratio.
其全新设计、并优化的导航系统是基于过去16个月中，用户的搜索和反馈、对搜索引擎优化(SEO)性能的研究、以及最佳应用和持续分析的成果。
The new design and streamlined navigation is based on user research and feedback, SEO performance research and best practices, and continuous analysis over the past 16 months.
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