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The performance and longevity of contact type electromechanical switches and relays are traditionally major concerns in many electrical power and communication applications. The contact impact between a switch and its corresponding substrate due to applied voltage or current may reduce the fatigue life of such devices. Thus a conflict exists between the response bandwidth and the reliability of a...
High speed machining (HSM) technology is used in a broad range of applications to machine ferrous metals and nonmetallic material. The motorized spindle is one of the major elements to keep the machine running at high productivity. Though the motorized spindle will generate high power and torque at high speed, high removable rate, but the thermal characteristics are more dynamical, speed-dependent...
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