Mine fire is a serious environment, health, and safety hazard throughout the world. Through analyzing the drawbacks of traditional extinguishing techniques
In ascending order of temperature and by considering the frequency of 1 Hz, a small peak is observed, centred around −68 °C (T1) and associated with a slight drop in E′ (ΔE′≈ 170 MPa), followed by another maximum at 36 °C (T2) with a sharp decrease in E′ by about ...
For one tree, the changing trend of the crown contour points is to expand outward from the treetop points. Therefore, we locate the candidate treetop points according to the variation of the z-coordinate of the PCD. First, all local maximums are sorted in ascending order of x, denoted as...