Gibbs free energy of amorphous alloys,solid solutions and compounds in the Gd-Fe-Al ternary system were calculated with a semi-empirical model based on Miedema\'s theory to predict the glass-forming range(GFR) and the glass-forming ability(GFA) of this system.

The forming range of the amorphous Mg Ni alloy is calculated by the Miedema model, and is compared with the experimental result.

This paper develops the method of delimiting vulnerable scope and assessing coastal vulnerability through the observation and sampling in the field and applying the means of remote sensing and GIS, which can be suitable for great river delta and coastal plains with great area, relative complex micro geomorphology and the protection of seawall.