Assessment of urban seismic social vulnerability based on game theory combination and TOPSIS model: a case study of Changchun City

Abstract Earthquakes, as one of the common natural phenomena in China, can directly lead to the collapse of buildings and trigger secondary effects such as landslides and tsunamis, often resulting in significant property losses and casualties.Therefore, conducting seismic risk assessments for regions holds great membership practical significance.Cu

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Anti-turbulent efficiency of oil-soluble polymer solutions and colloid systems flowing through cylindrical channel

Relevance.The use of anti-turbulent additives for transporting hydrocarbon liquids through main pipelines allows reducing significantly the energy consumption of pumping power stations.Aim.Comparative analysis of the anti-turbulent efficiency of high-molecular polymers and compositions of surfactants.Methods.Laboratory-scale experimentation aimed t

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