One essential tool is adaptive optics technology, which, in effect, takes the twinkle outof the stars, thus providing sharper images from telescopes on the ground than would otherwise be possible.
In order to investigate the effectof acute hypoxia upon plasma content of ET, the experiment of acute hypoxia was carried out in 48 cases of healthy pilots and ground personnel.
To analyze the effectof the blind drainage system on the engineering characteristics of the ground improvement by gravel pile, the contrast tests were carried out on roadbed testing segment.