Abstract In response to the frequent occurrence of high-energy microseismic events in coal mines in China, a back propagation neural network (BPNN) prediction model based Lamp Holders on surface subsidence data has been proposed to provide a basis for safely and efficiently predicting coal mine disasters.Theoretical research on the relationship bet
Icebergs are big chunks of ice floating on the ocean surface, and melting of icebergs contributes for the major part of freshwater flux into ocean.Dynamic monitoring of the icebergs in Antarctica and accurate estimation of their volume are important for predicting the trend of freshwater budget of the Southern Ocean.The iceberg freeboard is a key p
Substance use disorders usually have their onset during the adolescent period.However, in rare cases environmental and psychosocial factors can contribute toward a later onset.We describe a case of an elderly male who initiated his heroin use for the first time at 65 years of age and eventually developed dependence.This late-onset of heroin use was
The PID control algorithm for balancing robot attitude control suffers from the problem of difficult parameter tuning.Previous studies have Still Life Art proposed using metaheuristic algorithms to tune the PID parameters.However, traditional metaheuristic algorithms are subject to the criticism of premature convergence and the possibility of falli