不久前,一个德国大学学生团队宣布他们研发出来一种小的能量空气动力飞行器,它能能从轨道的传导途径中汲取。
Not long ago, a team of German university students announced that they had created a small aerodynamic vehicle that draws power from conducting paths on a track.
抛物型积分微分方程多出现在记忆材料的热传导、多孔粘弹性介质的压缩、原子反应、动力学等问题中。
The integro-differential equation of parabolic type often occurs in applications such as heat conduction in materials with memory, compression of viscoelastic media, nuclear reactor, dynamics, etc.
对在一个各向同性、均匀的弹性球的具有恒定的热传导系数的球面上进行加热这一理想情况下,计算了陨星由于空气动力学加热而产生的热应力。
Thermal stress in meteoroids by aerodynamic heating is calculated for the ideal case of an isotropic, homogeneous, elastic sphere being heated at the surface with a constant heat transfer coefficient.
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