Aiming at shipping movement and the time of collision avoidance in decision-making collision avoidance, a mathematical model was used for ship collision avoidance and to forecast the DCPA and TCPA.

针对船舶避碰决策系统中的船舶运动趋势和避碰时机建立数学模型，实时预估目标船相对于本船的最近会遇距离和最近会遇时间。

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Police said Jayden Lee McIvor was on foot at the time of a collision between two cars in Telford, Shropshire, on Saturday.

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The couple, who lived in Hillfields, Fishponds, had bought their tandem bike - which they were riding at the time of the collision - before Christmas.

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Mr Green was driving their Citroen Xsara and his wife was a passenger at the time of the collision with a Land Rover Defender travelling the other way.

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