General regression neural networks; Neural networks; Radial basis functions; Time series Artificial intelligence; Backpropagation; Feedforward neural networks; Functions; Image segmentation; Medical imaging; Metropolitan area networks; Probability density function; Radial basis function networks; Regression analysis; Time delay; Time series analysis; Vegetation; Art methods; Artificial datums; Artificial neural networks; General regression neural networks; Gravitational lensing; Learning times; Radial basis functions; Time series; Time- delays; Neural networks