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AN AUTONOMOUS GPS-DENIED UNMANNED VEHICLE PLATFORM BASED ON BINOCULAR VISION FOR PLANETARY EXPLORATION
Planetary Exploration Unmanned Vehicle Platform Vision-based Navigation Feature Matching 3D Reconstruction
2018/5/15
Vision-based navigation has become an attractive solution for autonomous navigation for planetary exploration. This paper presents our work of designing and building an autonomous vision-based GPS-den...
COMPARISON BETWEEN RGB AND RGB-D CAMERAS FOR SUPPORTING LOW-COST GNSS URBAN NAVIGATION
Urban Navigation Relative Orientation Kalman filter RGB-D Kinect GNSS Low-cost
2018/6/5
A pure GNSS navigation is often unreliable in urban areas because of the presence of obstructions, thus preventing a correct reception of the satellite signal. The bridging between GNSS outages, as we...
航空网络航路点布局的多目标优化设计
航路网络 航路点布局 多目标优化 蝙蝠算法
2018/2/8
航路网络中航路点布局问题（CWLP）是航路网络规划的核心。基于此，从航路网络经济性和安全性出发，考虑航路运行成本和潜在冲突系数两个因素，建立航路点布局多目标优化模型，求解时采用动态递变权重系数的蝙蝠算法以保证运行成本和潜在冲突系数能同时获得较优解。最后对北京飞行情报区进行仿真实验，将蝙蝠算法（BA）与其他多目标算法对比，得到4种算法的非支配解，证明多目标蝙蝠算法在求解航路点布局的大规模优化问题上，...
EXTRACTING LANDMARKS FOR CAR NAVIGATION SYSTEMS USING EXISTING GIS DATABASES AND LASER SCANNING
Car Navigation Landmarks GIS
2015/5/18
Today’s car navigation systems provide driving instructions in the form of maps, pictograms, and spoken language. However, they are
so far not able to support landmark-based navigation, which is the ...
基于UKF滤波的WSN节点定位研究
WSN节点定位 TOF测距 UKF EKF滤波
2014/5/6
无迹卡尔曼滤波（UKF）模拟系统的后验概率密度函数，避免了扩展卡尔曼滤波（EKF）中引入的较大线性化误差的缺陷。本文提出了一种基于加权最小二乘法（WLSE）和UKF的WSN节点定位算法。算法采用TOF测距技术测量未知节点到信标节点的距离，利用加权最小二乘法估算未知节点的初始位置，并采用UKF滤波对节点进行精确定位，同时与EKF滤波结果进行比较。相关分析结果表明，算法在TOF测距基础上，将加权最小二...
As long as people have been navigating, they have needed to know how to measure time. Technology has changed the required level of precision, and the details of the application, but to-date some knowl...
Time and Frequency Activities at the U.S. Naval Observatory
Time Frequency Activities U.S. Naval Observatory
2009/9/3
The US Naval Observatory (USNO) has provided timing for the navy since 1830 and, in cooperation with other institutions, has also provided timing for the United States and the international community....