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TheScientificWorldJOURNAL
Volume 11, Pages 992-1004
http://dx.doi.org/10.1100/tsw.2011.95
Research Article

Prediction on the Seasonal Behavior of Hydrogen Sulfide Using a Neural Network Model

1Department of Electronic Engineering, Sejong University, Seoul, Republic of Korea
2Department of Computer Engineering, Sejong University, Seoul, Republic of Korea
3Department of Environment and Energy, Sejong University, Seoul, Republic of Korea

Received 19 January 2011; Revised 4 April 2011; Accepted 4 April 2011

Academic Editor: Richard Brown

Copyright © 2011 Byungwhan Kim et al.

Abstract

Models to predict seasonal hydrogen sulfide (H2S) concentrations were constructed using neural networks. To this end, two types of generalized regression neural networks and radial basis function networks are considered and optimized. The input data for H2S were collected from August 2005 to Fall 2006 from a huge industrial complex located in Ansan City, Korea. Three types of seasonal groupings were prepared and one optimized model is built for each dataset. These optimized models were then used for the analysis of the sensitivity and main effect of the parameters. H2S was noted to be very sensitive to rainfall during the spring and summer. In the autumn, its sensitivity showed a strong dependency on wind speed and pressure. Pressure was identified as the most influential parameter during the spring and summer. In the autumn, relative humidity overwhelmingly affected H2S. It was noted that H2S maintained an inverse relationship with a number of parameters (e.g., radiation, wind speed, or dew-point temperature). In contrast, it exhibited a declining trend with a decrease in pressure. An increase in radiation was likely to decrease during spring and summer, but the opposite trend was predicted for the autumn. The overall results of this study thus suggest that the behavior of H2S can be accounted for by a diverse combination of meteorological parameters across seasons.