Combined Mechanistic and Empirical Modelling
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Belmiro Duarte
We consider a hybrid modelling approach based on the combination of prior knowledge, in the form of mechanistic models, with tools for the extraction of knowledge from operating data: the first component captures first-principles system behavior features, while the second one accounts for the differences found between mechanistic predictions and real data. The empirical modelling methods tested include backpropagation Artificial Neural Networks (ANN), Multivariate Adaptive Regressive Splines (MARS) and Regression Analysis (RA). In the proposed hybrid structure, mechanistic predictions provide additional inputs for the empirical module. To evaluate the performance of the various combinations of modules and hybrid approaches, we consider two simulated case studies (involving a CSTR with a reversible reaction and a fed-batch penicillin fermentation process). In all of the above, our hybrid structure based on a mechanistic module together with an empirical component has outperformed other approaches, and the mechanistic model/MARS combination resulted in lowest overall prediction errors.
©2011 Walter de Gruyter GmbH & Co. KG, Berlin/Boston
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Artikel in diesem Heft
- Review
- Industrial Applications of Reactive Distillation: Recent Trends
- Phase Mixing Modeling in Multiphase Reactors Containing Gas Bubble: a Review.
- Article
- Numerical Aspects of Bubble Column Simulations
- Reactor Operating Strategy and Secondary Nucleation in Emulsion Polymerization
- Combined Mechanistic and Empirical Modelling
- The Catalytic Evaluation of Structured Zeolite Catalysts
- A Mechanistic Model for the Water Gas Shift Reaction Over Commercial Catalysts Containing CuO/ZnO
- Catalytic Pyrolysis of Difluorochloromethane to Produce Tetrafluoroethylene
- Radial Profiles of Particle Velocity in a Large Scale CFB Downer
- Nonlinear Dynamic Analysis of the Local Heat Transfer Rate in Three-Phase Reactors
- Conversion of Synthesis Gas into Light Hydrocarbons. Modelling of the Catalytic Reaction Network
- Influence of the Preparation Method and Metal Precursor Compound on Alumina-Supported Pd Catalysts
- A 3D Model of Combustion in Large-Scale Circulating Fluidized Bed Boilers
- Gas and Solid Mixing in High-Density CFB Risers
- A Local Model for Gas-Liquid Mass Transfer in a Gas-Liquid-Solid Circulating Fluidized Bed
- A Hybrid Methodology For On-Line Process Monitoring
- A Laboratory Steam-Cracking Reactor to Characterize Raw Materials
- Modeling, Simulation and Optimal Control of Ethylene Polymerization in Non-Isothermal, High-Pressure Tubular Reactors
- A Parametric Study of the Oxygen Elimination Process in a Packed Bed
- Flow Generated by Radial Flow Impellers: PIV Measurements and CFD Simulations
- Enhanced Reactor Performance with Pressure and Vacuum Swing Reaction
- Characterization and Selection of Materials for Air Biofiltration in Fluidized Beds
- Control and Optimization of a Three Phase Industrial Hydrogenation Reactor
- Horizontal Penetration of Gas-Liquid Spray Jets in Gas-Solid Fluidized Beds
- Optimization of Flow Shear Stress Through a Network of Capillary Fibers With the Use of CFD
- Oxygen Distribution in Packed Bed Membrane Reactors For Partial Oxidation Systems and its Effect On Product Selectivity
- Wastewater Minimisation Using a Heuristic Procedure
- Characterization of Fluidization Quality in Fluidized Beds of Wet Particles
- Numerical and Experimental Investigations into The Effect of Gap Between Baffle and Wall on Mixing in an Oscillatory Baffled Column
- Alternative Designs for Fixed Bed Catalytic Reactors
- Hydrodynamic and Mass Transfer Parameters in Agitated Reactors Part I: Critical Mixing Speed, Induced Gas Flow Rate, and Wavy Surface in SARs and GIRs
- Application of CFD Modelling Technique in Engineering Calculations of Three-Phase Flow Hydrodynamics in a Jet-Loop Reactor
- 3-D Modeling of Liquid Injection into Fluidized Beds
- Conference Presentation
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- Elastic Granular Flows
- Multi-fluid CFD modelling of fluidised bed reactors
- Chemical Reaction Engineering, the Environment, Pollution Prevention and Sustainable Development
- Gas-Liquid-Solid Fluidization: Perspectives
- Short Communication or Note
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- Enhancement of the Distribution of a Liquid Sprayed Into a Fluidized Bed