http://dl.gi.de/handle/20.500.12116/23841 Fri, 24 Jul 2026 17:37:51 GMT 2026-07-24T17:37:51Z http://dl.gi.de/handle/20.500.12116/27454 Air Quality Management Via the Forecasting Models Holnicki, Piotr; Kałuszko, Andrzej Hřebíček, J.; Ráček, J. The paper addresses the possible applications of air pollution forecasting models for supporting decisions concerning regional strategy of emission abatement or the real-time emission control. The approach is based on the integration of a dynamic, air pollution forecasting model with the respective optimization techniques. The first problem (static optimization) consists in the optimal selection of emission reduction technologies within a given set of power plants. The second problem is formulated as on-line minimization of an environmental cost function, by the respective modification of emission level in the controlled sources, according to the changing meteorological conditions. The formulation of the gradient optimization algorithm is based on the necessary optimality conditions for the problem. The test computations have been performed for the above tasks, basing on the set of the major power plants in the industrial region of Upper Silesia (Poland). Sat, 01 Jan 2005 00:00:00 GMT http://dl.gi.de/handle/20.500.12116/27454 2005-01-01T00:00:00Z http://dl.gi.de/handle/20.500.12116/27461 The Hydrological IT Framework of the Federal Waterways and Shipping Administration, Germany Michl, Christian; Steinmann, Frank; Reineke, Anja Hřebíček, J.; Ráček, J. The Federal Waterways and Shipping Administration (WSV) in Germany provides as main tasks the safe and easy of inland and coastal shipping transport. To assure these main tasks information technology (IT) solutions and their operation are playing a major role. As central IT support and development section the Federal Waterway and Research Institute with their Information Technology Division are in charge for these developments. Beginning in the year 2000 the hydrological IT framework was redesigned to generate a structured data flow combining the elements of data acquisition, data processing and data distribution providing a standardised intranet solution and an e- Government application. The data acquisition using different telemetric systems as well as on- and offline components were standardised introducing a simultaneous online data transfer system which is connected to regional hydrological data storages. The regional hydrological data storages are grouped in three Citrix Metaframe terminal server farms split in seven server locations and providing the hydrological application software. For the data acquisition the WISKI workbench systems of the Kisters AG is used; existing of different modules for data validation, standardised reporting, stage and flow regulations, tidal and stream flow analysis. Using the Citrix Secure Gateway technology and web interface the internet access for the operation of the system is guaranteed and all components can be used from variable access. Server balancing and WISKI backup database servers provide a high working performance and security. The regional hydrological data storages provide the raw and analysed data to a central hydrological information system for the flood and storm tide warning service, e-Government applications, archiving of historical data and further distribution services. Sat, 01 Jan 2005 00:00:00 GMT http://dl.gi.de/handle/20.500.12116/27461 2005-01-01T00:00:00Z http://dl.gi.de/handle/20.500.12116/27460 Numerical Modelling and Analysis of Water Free Surface Flows∗ Dabaghi, Fadi; El Kacimi, Abdellah; Kada Kloucha, Chakib; Mezali, Farouk; Nakhle, Bassam Hřebíček, J.; Ráček, J. Various environmental engineering applications related to water resources involve unsteady free surface flows. A full 3D models based on Navier-Stokes equations are a good description of the physical features concerning several phenomena as for example lake eutrophication, transport of pollutant, flood in rivers, watershed, etc. However these models are characterized by an important computational effort, that we aim to reduce in some case by the help of 2D models or by appropriate coupling models of different dimensions and by the use of the parallel algorithmic trough HPCN facilities. In this work, we present an overview of some approximations methodologies and techniques for an efficient numerical modelling of water free surface problems in a finite element context. Sat, 01 Jan 2005 00:00:00 GMT http://dl.gi.de/handle/20.500.12116/27460 2005-01-01T00:00:00Z http://dl.gi.de/handle/20.500.12116/27457 Development of an Agent-based Model to Analyse the Effect of Renewable Energy on Electricity Markets Genoese, Massimo; Sensfuß, Frank; Weidlich, Anke; Möst, Dominik; Rentz, Otto Hřebíček, J.; Ráček, J. In this paper we present a bottom-up modelling approach of electric power and CO2-certificate markets including a detailed modelling of renewables using agent-based simulation: The PowerACE model. It has been developed at the Institute for Industrial Production, the Chair for Information Management and Systems (University of Karlsruhe) and the Fraunhofer Institute for Systems and Innovation Research. The market players of the German electricity market are modelled as independent entities. It is well suited to consider different strategies of market players and testing different market mechanisms. Sat, 01 Jan 2005 00:00:00 GMT http://dl.gi.de/handle/20.500.12116/27457 2005-01-01T00:00:00Z