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A novel antifungal peptide with high potency was isolated from foxtail millet seeds.

In order to study the effect of non-uniform support settlement on global stability ultimate bearing capacity of lattice shell structure, combining with the project of first site protective building in Zhoukoudian Ruins, the finite element software ANSYS is employed to conduct geometric nonlinear and double nonlinear global stability analysis of the single-layer lattice shell respectively based on consistent mode imperfection method and advanced consistent mode imperfection method, thus the global stability ultimate bearing capacity under different settlement cases is obtained and compared. Analysis results show that non-uniform support settlement is beneficial to increase the elastic global stability ultimate bearing capacity of the structure by a small margin, but excessive settlement may have adverse effects on the bearing capacity of the structures with initial imperfections. When considering material nonlinearity, small non-uniform support settlement is conducive to a slight increase in the elastoplastic global stability ultimate bearing capacity of the structure that decreases and is lower than that without settlement with the increase of non-uniform settlement. In addition, non-uniform support settlement will not affect the instability path of the lattice shell.

The chain drive system, being one of the core subsystems of the scraper conveyor, greatly influences the coal-conveying efficiency due to its dynamic characteristics. Therefore, this paper employed an experimental method to compare the dynamic characteristics of the chain rings at various positions within the chain drive system. This article simulated the three most common working conditions. The results indicated that the chain speed, load, and surface undulation had a stimulating effect on chain vibration, with the most significant impact observed on the chain ring located in the middle of the adjacent scraper. The scraper exerted an inhibitory effect on the vibration of the chain ring. Among the factors studied, the load had the most significant influence on the transverse direction. When there was surface undulation, the vibration of the chain ring in the running direction formed an ‘N’ shape. This condition intensified the vibration during uphill and downhill stages while suppressing vibration at the slope peak. This research holds great significance in enhancing operation stability.