The palaeogeographic map is a graphic representation of physical geographical characteristics in geological history periods and human history periods.It is the most important result of palaeogeographic study.The author, as the Editor-in-Chief of Journal of Palaeogeography, Chinese Edition and English Edition, aimed at the problems of the articles s
One of the main problems in oil and gas pipelines is abrasion corrosion on the edges of the flow channel in the plug and ball valves.Under normal conditions, the gas is moving at a pressure of about 145 bar and an approximate speed of Bupleurum 70 feet per second; The suspended particles in the gas collide with the edges of the flow channel and cau
In this study, the amount of generated pool fire, as a result of the release of chemicals in the case of an accident in tunnels, was simulated and the results were compared to the experimental data.At first, various amounts of spatial resolution (R*) were considered to compare the existing experimental data at different Football - Shoes - Men heigh
Abstract Background The imaging characteristics of sacral sacralalar-iliac (S2AI) screw trajectory in adult degenerative scoliosis (ADS) patients will be determined.Methods S2AI screw trajectories were mapped on three-dimensional computed tomography (3DCT) reconstructions of 40 ADS patients.The starting point, placement plane, screw template, and a