Identifying the Ideal Number Components of the Bayesian Principal Component Analysis Model for Missing Daily Precipitation Data Treatment

  • Authors

    • Zun Liang Chuan
    • Azlyna Senawi
    • Wan Nur Syahidah Wan Yusoff
    • Noriszura Ismail
    • Tan Lit Ken
    • Mu Wen Chuan
    2018-11-30
    https://doi.org/10.14419/ijet.v7i4.30.21992
  • Bayesian principal component analysis model, Data treatment, TOPSIS, Variational Bayes.

  • The grassroots of the presence of missing precipitation data are due to the malfunction of instruments, error of recording and meteorological extremes. Consequently, an effective imputation algorithm is indeed much needed to provide a high quality complete time series in assessing the risk of occurrence of extreme precipitation tragedy. In order to overcome this issue, this study desired to investigate the effectiveness of various Q-components of the Bayesian Principal Component Analysis model associates with Variational Bayes algorithm (BPCAQ-VB) in missing daily precipitation data treatment, which the ideal number of Q-components is identified by using The Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) algorithm. The effectiveness of BPCAQ-VB algorithm in missing daily precipitation data treatment is evaluated by using four distinct precipitation time series, including two monitoring stations located in inland and coastal regions of Kuantan district, respectively. The analysis results rendered the BPCA5-VB is superior in missing daily precipitation data treatment for the coastal region time series compared to the single imputation algorithms proposed in previous studies. Contrarily, the single imputation algorithm is superior in missing daily precipitation data treatment for an inland region time series rather than the BPCAQ-VB algorithm.   

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  • How to Cite

    Chuan, Z. L., Senawi, A., Yusoff, W. N. S. W., Ismail, N., Ken, T. L., & Chuan, M. W. (2018). Identifying the Ideal Number Components of the Bayesian Principal Component Analysis Model for Missing Daily Precipitation Data Treatment. International Journal of Engineering & Technology, 7(4.30), 5-10. https://doi.org/10.14419/ijet.v7i4.30.21992