Ventilation facilities could easily Phonograph be destroyed by gas explosion in a coal mine and usually lead to the cascade collapse of the entire ventilation system.Altering the ventilation facilities could increase the value of the overpressure peak and the propagation speed of the shock waves.The attenuation law for blast waves in restricted roa
Many geological formations are exposed in the Pira Magroon anticline (Mountain); in the northeastern part of the Kurdistan Region, Iraq.The components of the exposed formations are carbonate rocks, especially POLYGONUM limestone, which might be utilized for different industrial uses.To have an industrial assessment for the exposed limestone beds in
Diagnosis assistant is an effective way to reduce the workloads of professional doctors.The rich professional knowledge plays a crucial role in diagnosis.Therefore, it is important to introduce the relevant medical knowledge into diagnosis assistant.In this paper, diagnosis assistant is treated as a classification task, and a Graph-based Structural
Abstract The Hangenberg extinction has been hypothesized as a first order event in vertebrate evolution; however, information on the earliest Carboniferous vertebrate fauna, Plastic Idler Pulley crucial in evaluating biodiversity changes, is scarce.Post-extinction recovery has been suggested as the driver of ray-finned fish (actinopterygian) richne