Essays about: "data-assimilation"

Showing result 1 - 5 of 9 essays containing the word data-assimilation.

1. 1. Data Assimilation for Systems with Multiple Timescales

   University essay from KTH/Skolan för teknikvetenskap (SCI)

   Author : Dan Vicente Ihanus; [2023]
   Keywords : Mathematics; Partial Differential Equations; Numerical analysis; Data assimilation; Numerical weather prediction; Ensemble Kalman Filter;

   Abstract : This text provides an overview of problems in the field of data assimilation. We explore the possibility of recreating unknown data by continuously inserting known data into certain dynamical systems, under certain regularity assumptions. READ MORE

3. 2. Towards improving automation with user input

   University essay from Linköpings universitet/Institutionen för datavetenskap

   Author : Joakim Åström; [2021]
   Keywords : feedback; interactive machine learning; active machine learning; system design; system interaction; automation;

   Abstract : 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. READ MORE

4. 3. Verification of HARMONIE-AROME, ECMWF-IFS and WRF: Visibility and Cloud Base Height

   University essay from Uppsala universitet/Luft-, vatten- och landskapslära

   Author : Elin Kindlundh; [2020]
   Keywords : HARMONIE-AROME; ECMWF-IFS; WRF; verification; visibility; cloud base height; HARMONIE-AROME; ECMWF-IFS; WRF; verifikation; sikt; molnbashöjd;

   Abstract : 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. READ MORE

5. 4. An evaluation of deterministic prediction of ocean waves using pressure data to assist a Wave Energy Converter

   University essay from KTH/Skolan för industriell teknik och management (ITM)

   Author : Niclas Bassili; Douglas Eriksson; [2020]
   Keywords : Deterministic wave prediction; Pressure sensor; Weakly dispersive reconstruction method; Time to spatial data assimilation; High-order spectral method; Determinisk vågförutsägelse; Trycksensor; Weakly dispersive reconstruction method; Time to spatial data assimilation; High-order spectral method;

   Abstract : 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. READ MORE

6. 5. Improving Short-Range Cloud Forecasts in Harmonie-Arome Through Cloud Initialization Using Mesan Cloud Data

   University essay from Uppsala universitet/Luft-, vatten- och landskapslära

   Author : Joakim Pyykkö; [2019]
   Keywords : cloud initialization; HARMONIE-AROME; MESAN; satellite product; synoptic weather station;

   Abstract : 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. READ MORE