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。
Computing method of instrument circular gear drive for reduction;
减速仪表圆弧齿轮传动的计算方法