A STUDY ON METHOD FOR EMPIRICAL ORTHOGONAL FIELD PREDICTION CONSIDERING INFLUENCE FACTORS

The prediction equations formulated in the existing prediction methods toy using the empirical orthogonal function are generally based upon field resolution according to the statistical relation among the predictands. The influence of external factors is seldom to be considered. The present paper attempts to introduce the influence factors into the empirical orthogonal prediction method. There are five different approaches to be proposed for this purpose, what the field prediction method with optimum factors is studied with emphasis. In this method we consider not only the internal correlation among the predictands but also the influence of external factors, and the optimal prediction equation which is suitable for predicting both values and grades that may he formulated by the selected optimum factors from the combinational factors.The conception of weighting correlation coefficient is suggested here. The obvious difference between it and other correlation coefficients is that the former has the field charactor. Several practical examples corresponding to the previous mentioned prediction methods are also presented in this paper.