对此提出一改进梯度方法，并计算了某型战斗机从亚音速三维转弯升高到超音速的最短时间飞行轨迹。
This article presents a modifying gradient method, and the fastest 3-D turning trajectory from subsonic to supersonic is calculated.
但是最近，公司已经开始计划更便宜的“亚轨道”飞行，在太空无际黑暗的边缘进行更短时间的冒险。
But more recently, companies have begun to plan more affordable "suborbital" flights—briefer ventures just to the edge of space's vast darkness.
最近，一些公司已经开始计划更经济实惠的“亚轨道”飞行——在太空无际黑暗的边缘进行更短时间的冒险。
More recently, companies have begun to plan more affordable "suborbital" flights—briefer ventures just to the edge of space's vast darkness.
以飞机在垂直平面的运动方程为基础，采用线性时间负荷控制的飞行模式，提出了求解飞机最短时间爬升轨迹的格点搜寻算法。
To solve the problem of minimum time-to-climb, building a dynamic model of motion in the vertical direction and taking the flight mode as the linear load control.
以飞机在垂直平面的运动方程为基础，采用线性时间负荷控制的飞行模式，提出了求解飞机最短时间爬升轨迹的格点搜寻算法。
To solve the problem of minimum time-to-climb, building a dynamic model of motion in the vertical direction and taking the flight mode as the linear load control.
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