Sökning: "data-assimilation"
Visar resultat 1 - 5 av 8 uppsatser innehållade ordet data-assimilation.
1. Towards improving automation with user input
Master-uppsats, Linköpings universitet/Institutionen för datavetenskapSammanfattning : As complex systems become more available, the possibility to leverage human intelligence to continuously train these systems is becoming increasingly valuable. Collecting and incorporating feedback from end-users into the system development processes could hold great potential for future development of autonomous systems, but it is not without difficulties A literature review was conducted with the aim to review and help categorize the different dynamics relevant to the act of collecting and implementing user feedback in system development processes. LÄS MER
2. Verification of HARMONIE-AROME, ECMWF-IFS and WRF: Visibility and Cloud Base Height
Master-uppsats, Uppsala universitet/Luft-, vatten- och landskapsläraSammanfattning : Visibility and cloud base height are two important parameters within aviation meteorology and verification of operational numerical weather prediction (NWP) models with regard to these two parameters is therefore important. Visibility is often parameterized through an extinction coefficient, which is dependent on for example liquid or ice water content, however it also depends on the humidity, precipitation intensity and particle concentration. LÄS MER
3. An evaluation of deterministic prediction of ocean waves using pressure data to assist a Wave Energy Converter
Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)Sammanfattning : Currently, existing devices for extracting electrical power from ocean waves all suffer from problems with low efficiency due to a lack of information about the incoming waves in advance. The complex dynamic nonlinear characteristics of the ocean make the prediction of these incoming waves a great challenge. LÄS MER
4. Improving Short-Range Cloud Forecasts in Harmonie-Arome Through Cloud Initialization Using Mesan Cloud Data
Master-uppsats, Uppsala universitet/Luft-, vatten- och landskapsläraSammanfattning : Previous studies, such as van der Veen (2012) and White et al. (2017), have demonstrated the potential of using measurement-based cloud data to improve Numerical Weather Prediction (NWP) based cloud forecasts. This can be done through cloud initialization; a process of injecting cloud data after the regular data assimilation in an NWP model. LÄS MER
5. Implementation of a Block Krylov Algorithm in Variational Data Assimilation
Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)Sammanfattning : Numerical weather prediction relies on two major components: sophisticated atmospheric forecast models and equally important data assimilation algorithms. Data assimilation (DA) is the process used to produce the best estimate of the state of a model, using an Earth system numerical model and observations. LÄS MER