Then the formula of relation between light-wavelength change and tangential and radial velocity of light source is presented and the conclusions listed below are reached: (1)The light-wavelength change is determined together by tangential and radial velocity of light source; (2)Doppler effect is a special case of above-mentioned formula, (3)When the radi.

On the basis of radial velocity membership determination method, while the distribution of surface-number-density of galaxies in cluster regions is concerned s imultaneously, we calculate the distribution parameters and membership probabilities of individual galaxies for 8 Abell clusters.

The experimental results are found that the resistance changes of multi-wall carbon nanotube films increase linearly with increases of centripetal acceleration,and a linear relationship also occurres between the centripetal acceleration and the stress.

The line-of-sight velocity distributions (LOSVDs), including velocity dispersions, velocity distributions profile and redshift, are the important observational constraints in our understanding of the galactic dynamics, structures and evolution, as well as the nature of supermassive black holes in the center of galaxies.