『(Abstract)
　This paper highlights the performance of a radial basis function (RBF) network for ore grade estimation in an offshore placer gold deposit. Several pertinent issues including RBF model construction, data division for model training, calibration and validation, and efficacy of the RBF network over the kriging and the multilayer perceptron models have been addressed in this study. For the construction of the RBF model, an orthogonal least-square algorithm (OLS) was used. The efficacy of this algorithm was testified against the random selection algorithm. It was found that OLS algorithm performed substantially better than the random selection algorithm. The model was trained using training data set, calibrated using calibration data set, and finally validated on the validation data set. However, for accurate performance measurement of the model, these three data sets should have similar statistical properties. To achieve the statistical similarity properties, an approach utilizing data segmentation and genetic algorithm was applied. A comparative evaluation of the RBF model against the kriging and the multilayer perceptron was then performed. It as seen that the RBF model produced estimates with the R² (coefficient of determination) value of 0.39 as against of 0.19 for the kriging and of 0.18 for the multilayer perceptron.

Key Words: orthogonal least square; multilayer perceptron; kriging; genetic algorithms; offshore placer gold deposit.』

Introduction
Background
Working principles of RBF network
Selection of appropriate RBF network
Case study application
　Data partition for RBF modeling
　Development of the RBF model
　Performance of RBF model
Summary
Acknowledgments
Appendix: Mathematical formulation of RBF network
References