Abstract
Data preprocessing is an important stage in machine learning. The use of qualitatively prepared data increases the accuracy of predictions, even with simple models. The algorithm has been developed and implemented in the program code for converting the output data of a numerical model to a format suitable for subsequent processing. Detailed algorithm is presented for data pre-processing for selecting the most representative cloud parameters (features). As a result, six optimal parameters: vertical component of speed; temperature deviation from ambient temperature; relative humidity (above the water surface); the mixing ratio of water vapour; total droplet mixing ratio; vertical height of the cloud has been chosen as indicators for forecasting of dangerous convective phenomena (thunderstorm, heavy rain, hail). Feature selection has been provided by using recursive feature elimination algorithm with automatic tuning of the number of features selected with cross-validation. Cloud parameters have been fixed at mature stage of cloud development. Future work will be connected with identification of the influence of the nature of the evolution of the cloud parameters from initial stage to dissipation stage on the probability of a dangerous phenomenon.
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Acknowledgment
This research was sponsored by the Russian Foundation for Basic Research under the projects: № 16-07-01113.
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Stankova, E.N., Ismailova, E.T., Grechko, I.A. (2018). Algorithm for Processing the Results of Cloud Convection Simulation Using the Methods of Machine Learning. In: Gervasi, O., et al. Computational Science and Its Applications – ICCSA 2018. ICCSA 2018. Lecture Notes in Computer Science(), vol 10963. Springer, Cham. https://doi.org/10.1007/978-3-319-95171-3_13
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