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Neural network modeling of urea release from paraffin wax coated briquettes

Bhat, Ramananda M and Murthy, D V R and Saidutta, M B (2014) Neural network modeling of urea release from paraffin wax coated briquettes. In: International Conference on Environment and Sustainable Technologies (iCEST-2014), 3-5, January 2014, MIT-Manipal, India.

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Abstract

Urea briquettes are extensively used in agricultural fields so as to minimize loss of urea occurring by different mechanisms. However, the briquettes dissolve in about 8-10 hours, leaving a region of high concentration of urea around the shrinking briquette. Encapsulating the briquettes by coatings such as paraffin wax can assist in slowing down the dissolution of the briquette in agricultural fields. Objective of the present work is to model empirically using Multiple Regressions (MR) and Artificial Neural Networks (ANN) for the data of urea release from the paraffin wax coated briquettes. Urea release experimental data for two different and diverse soils viz. loam and silty clay soils and at different soil moisture contents were utilized for the empirical modeling. Output for both the models is the data on fraction of unreleased urea. Input parameters considered for the models were release time (duration) and the soil moisture contents. Soil characteristics were not included in the input, since urea release was found to be independent of soil type, as observed from the experiments. Moisture content was found to have higher influence on the output for the MR model than release time (duration). In the case of ANN model, 45% of the data were utilized for training the network. Best fit was observed with one hidden layer containing five neurons, and tansig transfer function. Better congruence between the experimental data and ANN model output (RMSE of 9.45%) was observed than between the experimental data with MR mode (RMSE of 11.65%).

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: briquette, coating, paraffin, model, soil, urea
Subjects: Engineering > MIT Manipal > Biotechnology
Depositing User: MIT Library
Date Deposited: 22 May 2015 09:13
Last Modified: 22 May 2015 09:13
URI: http://eprints.manipal.edu/id/eprint/142703

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