According to normal forecast, the per capita annual consumption volume of vegetable is about 120 KGS, the supply volume of vegetable produced in the demonstration area is absolutely insufficient.

Increasing the accuracy of forecast in normal times (knowing whether the economy next year will grow at 2.4 per cent or 2.5 per cent) is far less important than knowing the risk of a major recession.

It can determine equipment whole or local is in normal or abnormal, found early fault and the reasons, and can forecast fault development trend.