Mathematical models 695 Dissertations 52 Dissertations, Academic 52 Prices 44 Stocks 34 Data processing 28 Fluid dynamics 22 Design and construction 21 Electric power systems 19 Mathematical optimization 18 Computer simulation 17 Monetary policy 17 Forecasting 16 Stock price forecasting 16 Neural networks (Computer science) 15 Heat 14 Investments 14 Mathematics 14 Automatic control 13 Finance 13 Inventory control 13 Measurement 13 Statistical methods 13 Stock exchanges 13 Decision making 12 Genetic algorithms 12 Hydrodynamics 12 Image processing 12 Rain and rainfall 12 Testing 12