Construction Scheme of Innovative European Urban Digital Public Health Security System Based on Fuzzy Logic, Spectrum Analysis, and Cloud Computing Yiyang Luo , Vladislav Lutsenko , Sergey Shulga , Sergei Levchenko, and Irina Lutsenko Abstract In this paper, the growing European data center and the increasingly mature cloud computing technology were proposed to realize the construction of Urban Digital Public Health Security System (UDPHSS). And the scheme of Inno- vative UDPHSS for European modern cities under the COVID-19 pandemic was designed. Respiratory sounds, containing the structure information of individuals’ respiratory system, are analyzed and compared by fast Fourier transform (FFT) and spectrogram. Further extraction and understanding of respiratory sound features of the COVID-19 patients will be aided by means of artificial intelligence. The Pearson correlation coefficients were used to classify individuals’ degree of infection with COVID-19, and the membership functions were further constructed to realize the fuzzy logic control of UDPHSS for the allocation of items/medical resources/ assistance. And for some famous modern European cities, part of the technical requirements for building such innovative UDPHSS was calculated. Keywords Artificial intelligence (AI) · Cloud computing · COVID-19 · Fuzzy logic · Pearson correlation coefficient · Portable digital stethoscope · Respiratory sounds · Semi-Markov process · Spectrogram · Fast Fourier transform (FFT) · Urban Digital Public Health Security System (UDPHSS) Y. Luo (B ) · S. Shulga V. N. Karazin Kharkiv National University, 4 Svobody Sq., Kharkiv 61077, Ukraine e-mail: yiyangluo@163.com V. Lutsenko · I. Lutsenko O.Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine, 12 Academician Proskura St., Kharkiv 61085, Ukraine S. Levchenko International Institute of Applied Research and Technology, Steinbruchweg 2/1, 71069 Sindelfingen, Germany © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2023 X.-S. Yang et al. (eds.), Proceedings of Eighth International Congress on Information and Communication Technology, Lecture Notes in Networks and Systems 693, https://doi.org/10.1007/978-981-99-3243-6_26 333