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The Trump administration says it has a deal to save the popular video app, which by law must find a new, non-Chinese owner or face a ban in the United States. By Sapna Maheshwari Amanda Holpuch and ...

Abstract: The 3/2 water proportional directional valve (PDV) is an important hydraulic component to ensure a precise, low impact, and safety control of hydraulic powered roof support, which has been a ...

Abstract: Since the complicated decoupling control strategy of single winding single directional magnetic circuit (SDMC) in linear rotary motor (LRM) limits its application, its control system is ...