A Comparison between a Modified Counter Propagation Network and an Extended Self-Organizing Map in Remotely Sensed Data Classification     

Yongliang Chen  Micha I. Pazner  Wei Wu 《Mathematical Geology》2007,39(6):559-574

A modified counter propagation network model and an extended self-organizing map model have the same three-layer network architecture while employing slightly different learning rules. Their network architecture comprises an input layer, a Kohonen layer and an output layer. The neurons between two neighboring layers are fully connected and the neighboring neurons within the Kohonen layer also have neighborhood connections. The modified counter propagation network model employs the Kohonen algorithm to train the Kohonen layer while using the Widrow–Hoff rule to train the output layer. However, the extended self-organizing map model applies a modified Kohonen’s learning rule to train both the Kohonen layer and the output layer. This paper compares the performances of these two models in supervised classification of remotely sensed data. The training results show that compared to the extended self-organizing map model, the modified counter propagation model has faster learning speed but larger output errors. The classification results indicate that the extended self-organizing map model has a faster classification speed and a much higher classification precision than the modified counter propagation model.  相似文献   

The exceptional Oder Flood in summer 1997 nutrient concentrations in the Świna Strait during the years 1996 and 1997 - with emphasis on the flood event     

Marianna Pastuszak  Stanisław Sitek  Alfred Grelowski 《Ocean Dynamics》1998,50(2-3):183-202

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The exceptional oder flood in summer 1997 — riverine mass and nutrient transport into the Pomeranian Bight     

Volker Mohrholz  Marianna Pastuszak  Stanisław Sitek  Klaus Nagel  Hans Ulrich Lass 《Ocean Dynamics》1998,50(2-3):129-144

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Tourist farms in Lower Silesia, Poland   总被引：1，自引：0，他引：1  

Stanisław Grykień 《GeoJournal》1998,46(3):279-281

In view of the small size of most Polish farms, attempts have been made to encourage diversification into rural tourism. The paper examines the progress made in Lower Silesia which has good resources for domestic and international tourism. Thanks to the promotional work of the Agricultural Consultative Centres over a hundred farms are now providing services. They do not generate a large share of the farm income but business is expanding and some areas are becoming very popular. Thus a base has been established for future expansion. Further development depends on easier access to credit and government support for ecological agriculture. Better promotion is also needed to increase interest in rural tourism in Poland and attract more visitors from abroad. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

A modelling of effects of variable saturation in invaded zone near borehole on neutron tool response in the gas-bearing Miocene formations of the Carpathian foredeep,Poland     

M. Bała  U. Woźnicka  T. Zorski  A. Drabina 《Journal of Applied Geophysics》2011,73(1):84-91

Invasion of mud filtrate from the borehole into the surrounding formation can significantly alter the response of logging tools.In this paper the neutron tool response was calculated for a gas-bearing rock crossed by the borehole.The invaded zone is characterized by variable fluid and gas saturation and is defined by a specific hyperbolic function. The saturation function is based on the characteristics of Polish Carpathian Foredeep Miocene formations reached in gas-bearing rocks. The whole system including neutron tool equipped with Am-Be neutron source and a set of neutron detectors, borehole, invaded zone, and virgin zone, was numerically modeled and used as the input to the Monte-Carlo neutron transport code. The response of each detector was calculated for different combinations of porosity and saturation of invaded zone and virgin zone.  相似文献   

Hydroacoustic analysis of spatial and temporal variability of bottom sediment characteristics in Lake Kinneret in relation to water level fluctuation   总被引：1，自引：1，他引：0  

Ilia Ostrovsky  Jarosław Tęgowski 《Geo-Marine Letters》2010,30(3-4):261-269

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On model integration in operational flood forecasting     

Micha Werner  Doug Whitfield 《水文研究》2007,21(11):1519-1521

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Search for GRB related prompt optical emission and other fast varying objects with “Pi of the Sky” detector     

M. Ćwiok  W. Dominik  K. Małek  L. Mankiewicz  J. Mrowca-Ciułacz  K. Nawrocki  L. W. Piotrowski  P. Sitek  M. Sokołowski  G. Wrochna  A. F. Żarnecki 《Astrophysics and Space Science》2007,309(1-4):531-535

Experiment “Pi of the Sky” is designed to search for prompt optical emission from GRB sources. 32 CCD cameras covering 2 steradians will monitor the sky continuously. The data will be analysed on-line in search for optical flashes. The prototype with 2 cameras operated at Las Campanas (Chile) since 2004 has recognised several outbursts of flaring stars and has given limits for a few GRB.  相似文献   

A Review of Cometary Outbursts at Large Heliocentric Distances     

P. Gronkowski  M. Wesołowski 《Earth, Moon, and Planets》2016,117(1):23-39

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Variability of high rainfalls and related synoptic situations causing heavy floods at the northern foothills of the Tatra Mountains     

Tadeusz Niedźwiedź  Ewa Łupikasza  Iwona Pińskwar  Zbigniew W. Kundzewicz  Markus Stoffel  Łukasz Małarzewski 《Theoretical and Applied Climatology》2015,119(1-2):273-284

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