The description of a new device which is an improved version of the classic torsion balance is given. The device, which is the so-called “torsind”, seemed to
To study climate evolution, we consider the rotational motion of the Earth. The law of angular momentum change is analyzed, based on which the differential equa
With regard to the human exploration of Mars, low energy transfer trajectory is designed for Mars exploration based on the combination of invariant manifolds, d