Influence of decreasing speed technology and decreasing pressure technology on quality and properties of magnesium alloy die castings;
减速减压工艺对镁合金压铸件质量与性能的影响
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.
与正横前来船构成交叉相遇时 ,如让路船采取单用减速的措施 ,则随着减速幅度大小的变化 ,TCPA(最近会遇时间 )和 DCPA(最近会遇距离 )也按一定规律变化 ,文中结合数学推导 ,分析了两者的变化规律 ,从而为驾驶员确立最佳避让措施提供依据 。
Research of the Optimal Deceleration Speed of the Reentry Vehicle;
再入飞行器最优减速研究
Based on the existing missile penetration system,the influence of deceleration on penetration is analyzed,and the mathematical model of reentry maneuvering trajectory is established by means of aim-control method.
战术弹道导弹(TBM)再入机动减速是末制导系统的设计需求,为了分析机动减速对突防的影响,在现有导弹突防系统的基础上,利用目标控制法给定了升力的变化规律,建立了再入机动弹道数学模型,编制了再入段机动弹道仿真软件。
The analyse of the reason about the speed reduction in 100m race s latter half running from the point of accelerative running;
从加速跑的角度分析我国男子百米运动员后程减速的原因
The authors find reference efficiency for speed increase is higher than that of the same drive used for speed reduction.
指出了齿轮传动在升速和减速时基本啮合效率不相等,升速时比减速时要高,这不同于以往的观点。