This study investigated the asymmetric impact of natural resource exploitation on climate change in resource-rich African countries, based on panel data from 1980 to 2022.The dynamic common correlated effect click here (DCCE) and dynamic seemingly unrelated regression (DSUR) econometric techniques were employed to evaluate the long-term effects of
Ventricular septal defect (VSD) is a severe complication of acute myocardial infarction and has a high mortality rate.This complication appears to have declined in the reperfusion era.It has mostly been reported in elderly or female patients who suffer from anterior wall infarction, patients osborne hog feeders for sale with multivessel coronary ar
In order to improve the superheat control precision of the variable capacity refrigeration system, and establish the simple superheat control read more method, an intelligent superheat control strategy based on the traditional PID control strategy was proposed, with various influencing factors considered.The actual superheat control effect of the i