Comparison of three models of forest biomass estimation Application of mathematical models in research of Chinese materia medica Self-Similarity Relationship between Component of Shoot and Biomass of Three Hungriness Plants Prediction of soil nutrients spatial distribution based on neural network model combined with goestatistics. Application of RBF neural network in determining soil heavy metal spatial variability Artificial neural network model of spring wheat growth system in semi-arid areas and yield forecast Neural network modeling of the eutrophication mechanism in Lake Chenghai and corresponding scenario analysis Prediction of average ecological footprint in Chengdu based on genetic neural network model Estimating forest canopy cover by combining spaceborne ICESat-GLAS waveforms and multispectral Landsat-TM images.