A pre-peak was found in the low Q part of the structure factor S(Q)of Sn-2Cu tested at 260℃,implying that there exists not only SRO structure but also medium range order(MRO) structure in molten Sn-2Cu solder.

0at%Fe alloy, it is found that there exists a small prepeak at 670 ℃, implying the medium range order (MRO) structure; the prepeak disappears when the temperature is up to 1400 ℃.

The molecular-dynamics (MD) simulation based on the tight-bind potential for a liquid Al 5Fe 2 has been carried out to invstigate the structure of medium-range order (MRO), combined with X-ray diffraction experiment.

The present thesis systematically investigated the relationships between the fragility of superheated melts and the glass-forming ability(GFA) as well as the medium-range order(MRO) in Al-based amorphous alloys.

The results of our experiments show that a distinct prepeak which characterizes medium-range order (MRO) occurs in the structure factors of each amorphous alloy.

Obtained the relative residual of gravity between newtonian and non newtonian which showed that the intermediate range force at centrical region of a spheric shell is of centrifugal or centripetal.

The application of spacial scan of concentrative degree of seismic local meanlunar times in seismological study;