The gold concentrates are pretreated by alkaline hot-press oxidation followed by flash cyanidation in autoclave.

The Tertiary in the Aerjin Slope in Caidam Basin is characterized by strong carbonate recrystallization, weak compaction, weak quartz overgrowth and enrichment of the early-stage carbonate.

A new approximate formula for the large deflection problem of compression bar with two ends are simply supported is obtained, by the use of Ritz-Galerkin method.