Application of Artificial Neural Network to Predict Colour Change, Shrinkage and Texture of Osmotically Dehydrated Pumpkin

29th Symposium of Malaysian Chemical Engineers 2016

Tang, S.Y.^1 ; Lee, J.S.^2 ; Loh, S.P.^3 ; Tham, H.J.^1

Chemical Engineering Program, Faculty of Engineering, Universiti Malaysia Sabah, Jalan UMS, Kota Kinabalu, Sabah

88400, Malaysia^1

Faculty of Food Science and Nutrition, Universiti Malaysia Sabah, Jalan UMS, Kota Kinabalu, Sabah

88400, Malaysia^2

Department of Nutrition and Dietetics, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang, Selangor

43400, Malaysia^3

关键词: Absolute average deviation;    Correlation coefficient;    Feedforward backpropagation;    Network configuration;    Prediction capability;    Response surface methodology;    Root mean square errors;    Solution concentration;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/206/1/012036/pdf
DOI  :  10.1088/1757-899X/206/1/012036

来源: IOP

【 摘 要 】

The objectives of this study were to use Artificial Neural Network (ANN) to predict colour change, shrinkage and texture of osmotically dehydrated pumpkin slices. The effects of process variables such as concentration of osmotic solution, immersion temperature and immersion time on the above mentioned physical properties were studied. The colour of the samples was measured using a colorimeter and the net colour difference changes, ΔE were determined. The texture was measured in terms of hardness by using a Texture Analyzer. As for the shrinkage, displacement of volume method was applied and percentage of shrinkage was obtained in terms of volume changes. A feed-forward backpropagation network with sigmoidal function was developed and best network configuration was chosen based on the highest correlation coefficients between the experimental values versus predicted values. As a comparison, Response Surface Methodology (RSM) statistical analysis was also employed. The performances of both RSM and ANN modelling were evaluated based on absolute average deviation (AAD), correlation of determination (R2) and root mean square error (RMSE). The results showed that ANN has higher prediction capability as compared to RSM. The relative importance of the variables on the physical properties were also determined by using connection weight approach in ANN. It was found that solution concentration showed the highest influence on all three physical properties.