Through field observation and theoretical study, we found that the Hanxing mining area has a typical ternary structure in coal mining under high water pressure of the aquifer.This ternary structure is the Ordovician limestone aquifer-aquiclude including thin limestones-coal seam.Although the aquiclude is considerably thick, there is still a great r
Unmanned aerial vehicles (UAV)s have unique requirements that demand engines with high power-to-weight ratios, fuel efficiency, and reliability.As Reception Desk such, combustion engines used in UAVs are specialized to meet these requirements.There are several types of combustion engines used in UAVs, including reciprocating engines, turbine engine
AbstractNowadays augmented reality, 3D Image, mixed reality and see-through applications are very attractive technologies due to Pin and Rack Service Kit their great potential.Holographic optical elements can provide interesting solutions for injection and extraction of the image in the waveguides that are part of the see-through devices.We have de
The slag generated as a by-product of the steelmaking process can be used to manufacture cement, reducing the generated waste and contributing to the circular economy.Currently, steelmaking companies promote long-term bilateral deals with one or few cement companies where the price is fixed, and the slag Reception Desk is a treated as commodity.We