Unbiased grey prediction model of interval grey numbers and its application by using Cramer rule

Based on the white sequence and grey sequence of an interval grey number sequence of standardization, two new unbiased grey prediction models are built respectively in order to improve the accuracy of the interval grey number prediction model. The method of parameter estimation of the model is studied, and its time response expression and the […]

Concentrate Grade Prediction of Gold Ore Based on GA-BP Neural Network

Two prediction models for concentrate grade of gold mine were established respectively by using BP neural network and GA-BP neural network method on the basis of investigation in actual production. 978 groups of data were gathered from actual production, from which the 770 groups was selected for establishing the models, among which 120 groups was […]