Národní úložiště šedé literatury Nalezeno 2 záznamů.  Hledání trvalo 0.00 vteřin. 
Hybrid Method for Modelling and State Estimation of Dynamic Systems
Brablc, Martin ; Blaha, Petr (oponent) ; Bugeja, Marvin (oponent) ; Grepl, Robert (vedoucí práce)
This Doctoral thesis deals with the development of a new hybrid method for the dual estimation of states and parameters of nonlinear dynamic systems based on the idea of local linear models, which uses the estimation of the uncertainty of the model parameters to automatically adjust the parameters of the Kalman filter (KF), thus greatly simplifying its deployment and adjustment in practical applications. In the first part, the dissertation summarises the current state of knowledge in the field of dynamic systems, simultaneous estimation, KF and modelling of nonlinear dynamic systems. Then, in two separate chapters, it discusses the modification of KF for situations where inaccurate model parameters are the dominant influence causing process noise, and the modification of the Receptive field weighted regression (RFWR) method so that it can be used for dual estimation. Finally, the paper describes the developed hybrid method composed of modified RFWR and KF algorithms called Receptive field dual estimation - (RFDE) and demonstrates its performance on simulation and real data.
Forest Soil Physico-Chemical Sorption Spatial Links in Central-European Systems of Site Geographical Divisions
Samec, Pavel ; Balková, M. ; Kučera, A.
Spatial links among soil property values influence variability of soil sorption. The aim of this study was to compare the effect of geotectonic, soil-and biogeographical divisions on forest soil physicochemical sorption spatial links. The effect was investigated through optimal model selection and its comparison among the soil cover division systems of Central-European Highlands in the Czech Republic. Optimal model was selected through the closest-fitting estimations of linear global and local regressions between sorption and chemical or geomorphological forest soil properties. The optimal model comparison was carried out through linear regression with bedrock type proportion (geodiversity) at units of particular division systems. Chemical properties influenced forest soil sorption more than relief. Soil base saturation (BS) was locally more divided than cation exchange capacity (CEC). Local regression of BS with Al2O3 was divided by geotectonic systems the most, but it was not influenced by geodiversity. Geodiversity influenced local regression of CEC with Al2O3 in soil regions as well as regression with C/N in biogeographical regions. Differences between spatial links of BS and CEC suggest that forest soil sorption is divided into multi-level clusters. Spatial link modelling of soil sorption can optimalize forest growth condition division for effective management use.

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