The author suggests that if the SCO wants to gain sustainable,stable and healthy development,it must solve five distinctive problems properly,namely choosing the future developing focus,giving free rein to China and Russia s active role,emphasizing on "depoliticization",admitting new member cautiously and harmonizing role c.

The light center of gravity method is applied to processing optic fiber exited spot signal.

Distal location method of interlocking intramedullary nails based on gravity center of light spot;

The charge compensation defects would influcence the local environment of the doped rare earth ions, modifying their site symmetry, and therefore different types of luminescence centers should be formed.

The electronic structures of Mn 2+ luminescence centers in Mn-doped ZnS are studied by using first-principles linear muffin-tin-orbital method combining atomic sphere approximation.

PL results show very wide luminescence band in the range of 370 and 500nm when titania films are excited at 260nm at room temperature, and the band results from different luminescence centers.

Based on the quantum confinement -luminescence center model, the mechanism of Nano ZnO exciton luminescent and delect luminescent are analysed, and the authors point out that Nano ZnO luminescent between blue or blue-green band and ultraviolet band.

The electronic structures of luminescence centers in wurtzite ZnS doped withcopper are studied by using first--principles linear muffin ~tin--orbital method corn-biniflg atomic sphere approximation.