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The coronavirus disease 2019 (COVID‐19) has evolved into a pandemic rapidly. Most of the literature show that the elevated liver enzymes in COVID‐19 are of little clinical significance. Lower albumin level is seen in severe COVID‐19 and is not parallel to the changes in alanine aminotransferase and aspartate aminotransferase levels. We aimed to explore the impact of hypoalbuminemia in COVID‐19. This...
In order to accurately predict mine gas flow volume, based on the theory of the gray model, analyses the GM(1,1) mechanism, and point out the model of theoretical defects, than do optimum to the model of time response function. Optimum model will use to mine gas flow volume of prediction, the prediction accuracy for 98.1784%. Results show that the optimum model for the mine gas flow volume prediction...
Air pressure in proton exchange membrane fuel cells (PEMFC) directly affects fuel cells' electrochemistry-reactivity performance. It not only related to air flow and air temperature, but also affected by PEMFC output power. In order to make it in a proper value, the paper designed air pressure servo control system which given value was predicted in advance by Elman ANN according to PEMFC output power,...
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