The year 2020 ended with a significant COVID-19 pandemic, which traumatized almost many countries where the lockdowns were restored, and numerous emotional social protests erupted. According to the World Health Organization, the global epidemiological situation in the first months of 2021 deteriorated. In this paper, the decision-making supporting system (DMSS) is proposed to be an epidemiological prediction tool. COVID-19 trends in several countries and regions, take into account the big data clouds for important geophysical and socio-ecological characteristics and the expected potentials of the medical service, including vaccination and restrictions on population migration both within the country and international traffic. These parameters for numerical simulations are estimated from officially delivered data that allows the verification of theoretical results. The numerical simulations of the transition and the results of COVID-19 are mainly based on the deterministic approach and the algorithm for processing statistical data based on the instability indicator. DMSS has been shown to help predict the effects of COVID-19 depending on the protection strategies against COVID-19 including vaccination. Numerical simulations have shown that DMSS provides results using accompanying information in the appropriate scenario.
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http://dx.doi.org/10.1016/j.ssci.2021.105370 | DOI Listing |
Prog Mater Sci
April 2025
Institute of Biomechanics, Graz University of Technology, Austria.
Aortic dissection continues to be responsible for significant morbidity and mortality, although recent advances in medical data assimilation and in experimental and models have improved our understanding of the initiation and progression of the accumulation of blood within the aortic wall. Hence, there remains a pressing necessity for innovative and enhanced models to more accurately characterize the associated pathological changes. Early on, experimental models were employed to uncover mechanisms in aortic dissection, such as hemodynamic changes and alterations in wall microstructure, and to assess the efficacy of medical implants.
View Article and Find Full Text PDFTo promote the coordinated and sustainable development of hydropower exploitation and ecological environment in the upper reaches of the Yellow River, a fine simulation of the downstream riverway of Yangqu Hydropower Station was carried out to analyze the impact of the changes in water depth and flow velocity on fish habitats after the impoundment of Yangqu Hydropower Station. In this paper, was selected as the target fish species. The fish habitat model was constructed using MIKE21.
View Article and Find Full Text PDFData Brief
February 2025
Maritime Engineering Research Group, School of Engineering, University of Southampton, SO16 7QF UK.
This article presents data derived from a series of experiments conducted on a scaled model ship, examining its performance in both calm water and regular waves. The acquisition of high-quality experimental data is essential for refining Computational Fluid Dynamics (CFD) simulations and modifying analytical methods to evaluate the powering performance of ships. Despite notable advancements in numerical models, there exists a corresponding imperative to elevate the precision of measurements and insights obtained from towing tank tests.
View Article and Find Full Text PDFACS Omega
January 2025
State Key Laboratory of Petroleum Resources and Engineering, China University of Petroleum, Beijing 102249, China.
Under the environment of energy transformation in the world, underground coal gasification (UCG) is an important means to realize the green and clean development and utilization of deep coal resources. Due to a series of complex chemical reactions, the porosity and permeability of coal have changed significantly. Accurately characterizing the porosity and permeability of gasified coal is of great significance to the field screening, production control, and numerical simulation of the UCG project.
View Article and Find Full Text PDFACS Omega
January 2025
School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing, Jiangsu 211816, China.
The design of the flow field structure for bipolar plates significantly influences the output performance of proton exchange membrane fuel cells (PEMFCs). Adding baffles in the flow channels can enhance the transportation of reactants and electrochemical performance of the PEMFCs. In this study, three types of baffles with different shapes and sizes were designed.
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