Search results for " model calibration"

showing 4 items of 4 documents

Multiregression Analysis of the Kinetic Constants in Ephemeral Rivers: The Case Study of the Oreto River

2018

Profuse efforts have been committed to develop efficient tools to measure the ecological status of the receiving water body quality state. The recurrence to mathematical models as support tools for the receiving water body quality assessment can be an optimal choice. Indeed, mathematical models can allow to build-up the cause effect relationship between polluting sources and receiving water quality. Regarding the river water quality modelling, two different kinds of river can be single out: large and small rivers. In the modelling approach, the main differences between the two types of river are reflected in the model kinetic constants. Indeed, the main quality processes which control and g…

HydrologyMathematical modelSettore ICAR/03 - Ingegneria Sanitaria-AmbientaleEphemeral keymedia_common.quotation_subjectWater quality modelling reareation constants model calibrationWater quality modelling reareation constants model calibration model calibrationSettore ICAR/02 - Costruzioni Idrauliche E Marittime E IdrologiaKinetic energyRiver waterWater quality modelling Reareation constants Model calibrationWater bodyEnvironmental scienceQuality (business)River qualityWater qualitymedia_common
researchProduct

Traffic simulation models calibration using speed–density relationship: An automated procedure based on genetic algorithm

2016

Calibration of traffic models.Calibration as optimization problem.Use of genetic algorithm. This paper presents the first results of a research which applied a genetic algorithm to calibrate a microscopic traffic simulation model based on speed-density relationships. A large set of traffic data collected from the A22 Freeway, Italy, was used and a comparison was performed between the field measurements and the simulation outputs obtained for a test freeway segment by using the Aimsun microscopic simulator.The calibration was formulated as an optimization problem to be solved based on a genetic algorithm; the objective function was defined in order to minimize the differences between the sim…

Optimization problemComputer science02 engineering and technologySoftwareSettore ING-INF/04 - AutomaticaArtificial Intelligence0502 economics and businessGenetic algorithm0202 electrical engineering electronic engineering information engineeringCalibrationSettore ICAR/04 - Strade Ferrovie Ed AeroportiMATLABSimulationcomputer.programming_language050210 logistics & transportationbusiness.industry05 social sciencesGeneral EngineeringTraffic simulationPython (programming language)AimsunMicroscopic traffic simulation model CalibrationSpeed-density relationshipComputer Science ApplicationsGenetic algorithm020201 artificial intelligence & image processingbusinessAlgorithmcomputerData transmissionExpert Systems with Applications
researchProduct

Can uncertainty in flood hazard estimation be reduced by using high detailed topographic data for floodplain modelling?

2011

Floods are considered the most frequent natural disaster world-wide and may have serious socio economic impacts in a community. In order to accomplish flood risk mitigation, flood risk analysis and assessment are required to provide information on current or future flood hazard and risks. Hazard and risk maps involve different data, expertise and effort, depending also on the end-users. More or less advanced deterministic approaches can be used, but intuitively probabilistic approaches seem to be more correct and suited for modelling flood inundation given typical uncertainties. Two very important matters remain open for research: the calibration of hydraulic models (oriented towards the es…

Settore ICAR/02 - Costruzioni Idrauliche E Marittime E IdrologiaRisk map hazard map flood inondation model calibration uncertainty evaluation LISFLOOD-FP model
researchProduct

Global sensitivity analysis in integrated water quality modelling: an application to a real case study

2012

The increasing sensitivity towards water quality environmental issues led to the setting up of water quality integrated modelling approaches and the definition of water quality criteria that better represent the receiving water body quality status. More specifically, compared to the past, the tendency today is to design and manage the whole integrated urban drainage system, i.e. , wastewater treatment plant and receiving water body (RWB) considering each component not separately but jointly. Despite the advantages of a holistic approach for the assessment of the RWB quality state there are some limits that may prevent a straightforward application. Indeed, integrated models are generally ch…

Settore ICAR/03 - Ingegneria Sanitaria-AmbientaleIntegrated urban water quality management point and no point pollution sensitivity analysis model calibration
researchProduct