Rapid retreat of Arctic sea ice extends the area open ocean for new trans-Arctic shipping routes. However, projected routes may be too optimistic in terms savings costs from shortened distances as they do not consider increased fog frequency (SFF) over areas retreating ice. We show that delays due to can 1–4 days, about 23%–27% along Northwest Passage and 4%–11% Northern Sea Route than previous...

Abstract Aiming at the problem of poor detection accuracy and inaccurate positioning traffic signs under foggy conditions, this paper proposes an improved YOLOv3 algorithm. Firstly, a data set Chinese in environment is constructed; The dark channel priori algorithm based on guided filtering used to process image with fog, which overcomes quality degradation caused by fog. Mosaic enhancement per...