Evaluation and simulation analysis of China's copper security evolution trajectory

Copper metal is one important raw material of national economy, and its security is tightly linked with industrialization process. A comprehensive security evaluation index system, including three first class indicators, nine second class indicators and fourteen third class indicators, was constructed based on the pressure-state-response (PSR) model. And efficacy coefficient method was adopted in dimensionless treatment and entropy method was used to obtain the weight. Then, the data of China's copper from 1992 to 2011 were studied and collected. By processing these data, a comprehensive safety index of China's copper was got. The results showed that the comprehensive safety index of China's copper rose from its low point. The safety pressure state of China's copper was improved. The safety state of China's copper continued to be tight. The response state continued to rise. The overall situation of China's copper safety was improving, but still not optimistic.