The structure and optical properties of aluminum nitride thin film deposited on quartz substrate by using a direct current magnetron reactive sputtering system were studied by X-ray diffraction,spectroscopic ellipsometry and ultraviolet-visible spectrometry.

Kinetics of methane hydrate formation in mixture of ice powders and sand;

Study on technologic condition of sand in immobilized biological activated carbon purification technology;

Study on function correlation between long-fiber filtering and sand filtering;