| Wheat supplies and demands balance(WSDB) monitoring system is a set of quantified indices system that can explain the status of wheat supplies and demands(WSD).According to several principles such as the combination of security and economics,integration and importance,theory and practice,and antecedence and synchronization,this paper designs seven main monitoring indices including self-sufficient rate,sowing security base line,state storage security base line,industry storage security base line,farmers' storage security base line,market price swing range and regional balance rate.Furthermore,the paper analyses the alarm signal of WSD,and brings forward the measurements to insure WSDB at present time. |