Traditional visual simultaneous localization and mapping (SLAM) systems rely on point People Art features to estimate camera trajectories.However, feature-based systems are usually not robust in complex environments such as weak textures or obvious brightness changes.To solve this problem, we used more environmental structure information by introdu
Abstract Helheim Glacier, in East Greenland, is a major outlet glacier that discharges about 33 Portable Oxygen Concentrator Gigatons of ice per year into the ocean.Helheim has been undergoing a retreat since 2003.Using a portable terrestrial radar interferometer that scans the glacier every 2 min, we characterize its regime of tidal flexure at the
Abstract Background There is growing evidence of nervous system involvement and related complaints in children with coronavirus DIACTIVATEUR disease 2019 (COVID-19).However, it seems that attempts to track of the virus in the nervous system have so far been unsuccessful.Case presentation Here we describe two pediatric cases of severe COVID-19 who h
We proposed a new crash surrogate metric, i.e., the maximum disturbance that a car following scenario can accommodate, to represent potential crash risks with a simple closed form.The metric is developed in consideration of traffic flow dynamics.Then, we compared its performance in predicting the rear-end crash risks for motorway on-ramps with othe