drag-parachute

Influence of decreasing speed technology and decreasing pressure technology on quality and properties of magnesium alloy die castings;

減速減壓工藝對鎂合金壓鑄件質量與性能的影響

In crossing situation with a vessel approaching from forward of the beam, if decreasing speed is the only anti-collision measurement made by give-way vessel, TCPA and DCPA will regularly change with the decreasing range of give-way vessel s speed.

與正橫前來船構成交叉相遇時 ,如讓路船采取單用減速的措施 ,則隨著減速幅度大小的變化 ,TCPA(最近會遇時間 )和 DCPA(最近會遇距離 )也按一定規律變化 ,文中結合數學推導 ,分析了兩者的變化規律 ,從而為駕駛員確立最佳避讓措施提供依據 。