An electrical gadget can be powered without cords by providing via an air pocket to the device in order re-charge its capacity. The performance and practicality of cordless charging tech have noticeably enhanced lately. introduction this paper covers basics. evaluation standards, which includes Qi A4WP, is then given, as well a focus on their communications channels. Next, we put out cutting-ed...

This paper studies the air pressurization problem caused by a partially pressurized transient flow in reservoir-pipe system. The purpose of this study is to analyze performance rigid column model predicting attenuation pressure distribution. In regard, an analytic formula for amplitude and frequency will be derived, which influential parameters, particularly, driving water lengths, on damping c...