It has been found that the lognormal law, normal law and negative index law for the local accumulation of the diffusible hydrogen occured in the fusion zone, and the juncture of coarse grained and fine grained zones.

In this work,according to the complete diagonalization procedure(CDP)and the Zhao's Semi-SCF d-orbit model and the point charge model,the quantificational relationship between the optical spectra and the crystal microscopic local structure in D4h symmetry crystal fields is established.

Some studies of local structures in the molten state, including molten salts of alkaline metal halides, superionic and molten phases of CaF .

Optical absorption spectroscopy and X-ray absorption fine structure technique were used to study the formation mechanism of Cu nanoparticles and local structures of copper atoms in silicate glass.

An algorithm for the determination of semigroups with a known partial structure;

Subject to the change of the partial structure of a plastic part, the processes of the melted body flowing into the cavity were correspondingly analyzed by utilizing computer simulation and the results compared.

To find models including the given partial structure from massive CAD models,a retrieval method based on topology approximation is proposed.