Significance and Impact of the Study: Pit mud is a determining factor in the aroma of Baijiu. This study analysed the aroma substances, microbial composition and physicochemical indexes of pit mud in different years. So as to reveal the effects of physicochemical indexes on microbial communities and flavour substances. The results may provide a basis for studying the physicochemical indexes, community structure and flavour of Wenwang pits, offering a reference for optimizing the aroma and flavour of Baijiu.
Soilbags have been widely used to reinforce foundations since they effectively reduce vibrations. The vibration reduction effects of soilbags were illustrated through vertical excitations and the discrete element method (DEM) from two different perspectives. The frequency response and theoretical analyses of the wave propagation were used with excitations from a macroscopic perspective. The results show that the attenuation of vibrations using soilbags can be greatly reduced. The DEM simulations for a single soilbag were performed from the microscale perspective. The results revealed that the energy transfer and dissipation within a particulate system can be well captured, and the calculated energy obeyed the law of energy conservation. Under different loading rates, the percentage of energy dissipation exhibited wavy fluctuations with loading and unloading. The percentage of total energy dissipation was more than 70%, which also effectively proved that soilbags have good damping effects.
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