[IEEE 2019 IEEE 15th International Conference on the Experience of Designing and Application of CAD Systems (CADSM) - Polyana, Ukraine (2019.2.26-2019.3.2)] 2019 IEEE 15th International Conference on the Experience of Designing and Application of CAD Systems (CADSM) - The Clustering Method to the Information Resource Data According to the Sign of the Number of Series of Units as a Tool to Improve the Statistical Coding Efficiency