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On Approximate Dynamic Programming in Switching Systems

In order to simplify computational methods based on dynamic programming, an approximative procedure based on upper and lower bounds of the optimal cost was recently introduced. The convergence properties of this procedure are analyzed in this paper. In particular, it is shown that the computational effort in finding an approximately optimal control law by relaxed value iteration is related to the

Space Weather Physics: Dynamic Neural Network Studies of Solar Wind-Magnetosphere Coupling

This thesis presents studies of solar wind-magnetosphere coupling using dynamic neural networks in combination with statistically correlative analysis. The primary contribution of the thesis is dynamic neural network models that can be implemented for near real-time predictions of geomagnetic storms from the solar wind alone. With acceptable accuracy, the prediction time has been extended up to 5

Radiation balance of urban snow: a water management perspective

The radiation balance of urbanised catchments differs from their rural counterparts, with snowpacks experiencing either enhanced or decreased irradiance depending on snowpack location and condition. As snowmelt is largely driven by radiation inputs, changes to localised irradiance (and melt rates) have implications for urban runoff generation. Storm- and wastewater drainage systems in cold regions

Ätten Tersmeden genom sex århundraden

Individinriktad historik över den svenska adelsätten Tersmeden från dess äldsta kända rötter i Stade och Flensburg under 1400- och 1500-talen fram till de av dess svenska medlemmar som föddes före år 1900. Därtill historik över Tersmedenska släktföreningens verksamhet sedan 1912 samt över Tersmedenska släktarkivet.