Based on the relation of meteorological elements and pollen concentration in air,a prediction equation of pollen-allergy disease was statistically developed.

Based on the correlation analysis, the prediction equation for the weekly incidence of coronary heart disease is set up using the step regression, which provides some references for preventing and treating the disease.

In this paper firstly we have briefly introduced the basic characters of mountain disasters in Three- Gorge Reservoir, and then our attention is laid stress on the relationship between landslides and their antecedent rainfall in the area, at last fisher discriminate technique has been used in order to establish a forecast equation about rainfall for the occurrence of landslides.

Based on the analysis results, a forecast equation of heavy rain was established.

The procedure to set up the forecasting equation includes three steps: the first is the partition of the storm-type.

Gived the grade plot standard of Shenzhen ILI%,analysis the significant relationship between meteorological factors and ILI%,in the last get the critical range of temperature and humidity influence on ILI% and the forecasting equation of ILI%.

Based upon the model established here,a square prediction error is used to detect that the sensor fault for SPE(Principle component analysis) is sensitive to the sensor fault.