Sökning: "Forecasting methods"

Visar resultat 1 - 5 av 42 avhandlingar innehållade orden Forecasting methods.

  1. 1. Sampling uncertainties in ensemble weather forecasting

    Detta är en avhandling från Stockholm : Department of Meteorology, Stockholm University

    Författare :Linus Magnusson; Stockholms universitet.; [2009]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ensemble forecasting; Initial perturbation techniques; NATURAL SCIENCES Earth sciences Atmosphere and hydrosphere sciences Meteorology; NATURVETENSKAP Geovetenskap Atmosfärs- och hydrosfärsvetenskap Meteorologi; meteorologi; Meteorology;

    Sammanfattning : The aim of ensemble weather forecasting is to provide probability forecasts for the occurrence of meteorological events. The ensembles are constructed by assembling several forecast realisations, each member of the ensemble being constructed to sample the uncertainties in the forecast. LÄS MER

  2. 2. From data to decision - learning by probabilistic risk analysis of biological invasions

    Detta är en avhandling från Stockholm : Department of Meteorology, Stockholm University

    Författare :Ullrika Sahlin; Lunds universitet.; Lund University.; [2010]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; probabilistic models; establishment success; prediction; forecasting; uncertainty; risk; invasive species; Bayesian methods;

    Sammanfattning : Predicting an uncertain future with uncertain knowledge is a challenge. The success of efforts to preserve biodiversity, to maintain biosecurity and to reduce a negative impact from climate change, depend on scientifically based predictions of future events. LÄS MER

  3. 3. Solar Wind and Geomagnetic Activity - Predictions Using Neural Networks

    Detta är en avhandling från Lund Observatory, Lund University

    Författare :Hans Gleisner; Lunds universitet.; Lund University.; [2000]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Geophysics; kosmisk kemi; rymdvetenskap; magnetosphere; solar wind; space weather; geomagnetic activity; geomagnetism; ring current; auroral electrojet; neural networks; forecasting; Astronomy; space research; Astronomi; cosmic chemistry; physical oceanography; meteorology; Geofysik; fysisk oceanografi; meteorologi; Fysicumarkivet A:2000:Gleisner;

    Sammanfattning : This thesis shows how artificial neural networks (ANNs) can be applied to predict geomagnetic activity from solar-wind data. It introduces and summarizes five papers where development of ANN models are reported, and where predictions of geomagnetic activity are discussed. LÄS MER

  4. 4. Rainfall-Runoff Modelling Using Artificial Neural Networks (ANNs)

    Detta är en avhandling från Department of Water Resources Engineering, Lund Institute of Technology, Lund University

    Författare :Aman Mohammad Kalteh; Lunds universitet.; Lund University.; [2007]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hydrogeology; geographical and geological engineering; Hydrogeologi; teknisk geologi; teknisk geografi; Self-organizing map; Feed-forward multilayer perceptron; Forecasting; Hydrological modelling; Missing values; Rainfall-runoff modelling; Estimation; Artificial neural networks;

    Sammanfattning : Over the last decades or so, artificial neural networks (ANNs) have become one of the most promising tools for modelling hydrological processes such as rainfall-runoff processes. In most studies, ANNs have been demonstrated to show superior result compared to the traditional modelling approaches. LÄS MER

  5. 5. Essays on the Scandinavian Stock Markets

    Detta är en avhandling från Växjö : Växjö University Press

    Författare :Jonas Söderberg; Växjö universitet.; [2009]
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Scandinavian stock markets; Liquidity; Market microstructure theory; Liquidity spillover; Vector autoregression analysis; Forecasting; Out-of-sample tests; Copulas; Risk management; SOCIAL SCIENCES Business and economics Economics; SAMHÄLLSVETENSKAP Ekonomi Nationalekonomi; Economics; Nationalekonomi;

    Sammanfattning : This thesis consists of three self-contained empirical essays related to the stock markets in Denmark, Norway, and Sweden.In Essay I, the time-series dynamics of liquidity on the Scandinavian stock exchanges between January 1993 and June 2005 are studied with liquidity indices. LÄS MER