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Adaptive Moment Estimation On Deep Belief Network For Rupiah Currency Forecasting
https://doi.org/10.22146/ijccs.39071 Abram Setyo Prabowo(1*), Agus Sihabuddin(2), Azhari SN(3)
(1) Program Studi S2 Ilmu Komputer,FMIPA UGM, Yogyakarta, Indonesia
(2) Departemen Ilmu Komputer dan Elektronika, FMIPA UGM, Yogyakarta, Indonesia
(3) Departemen Ilmu Komputer dan Elektronika, FMIPA UGM, Yogyakarta, Indonesia
(*) Corresponding Author
Abstract
One approach that is often used in forecasting is artificial neural networks (ANN), but ANNs have problems in determining the initial weight value between connections, a long time to reach convergent, and minimum local problems.
Deep Belief Network (DBN) model is proposed to improve ANN's ability to forecast exchange rates. DBN is composed of a Restricted Boltzmann Machine (RBM) stack. The DBN structure is optimally determined through experiments. The Adam method is applied to accelerate learning in DBN because it is able to achieve good results quickly compared to other stochastic optimization methods such as Stochastic Gradient Descent (SGD) by maintaining the level of learning for each parameter.
Tests are carried out on USD / IDR daily exchange rate data and four evaluation criteria are adopted to evaluate the performance of the proposed method. The DBN-Adam model produces RMSE 59.0635004, MAE 46.406739, MAPE 0.34652. DBN-Adam is also able to reach the point of convergence quickly, where this result is able to outperform the DBN-SGD model.
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DOI: https://doi.org/10.22146/ijccs.39071
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