Abstract: A power supply unit supplies power to a load, and the power supply unit includes a power factor corrector, a DC conversion module, and an isolated conversion module. The power factor corrector is plugged into a first main circuit board and converts an AC power into a DC power. The DC conversion module is plugged into the first main circuit board and converts the DC power into a main power. The isolated conversion module includes a bus capacitor, the bus capacitor is coupled to the DC conversion module through a first power copper bar, and coupled to the power factor corrector through a second power copper bar. The first power copper bar and the second power copper bar are arranged on a side opposite to the first main circuit board, and are arranged in parallel with the first main circuit board.

Abstract: A method and system for inspecting deviation in dynamic characteristics of a feeding system are provided, and the method includes: exciting the feeding system and detecting vibrations of a subcomponent of a component to be inspected of the feeding system to generate a monitoring excitation signal in a monitoring mode; calculating, by a modal analysis method, monitoring eigenvalues and monitoring eigenvectors of the monitoring excitation signal; determining, by a modal verification method, similarity between the monitoring eigenvalues and standard eigenvalues of a digital twin model and similarity between the monitoring eigenvectors and standard eigenvectors of the digital twin model; determining that the dynamic characteristics of the subcomponent are deviated, when the monitoring eigenvalues and monitoring eigenvectors are not similar to the standard eigenvalues and standard eigenvectors. Therefore, the subcomponent whose dynamic characteristics are deviated can be sensed remotely and precisely.

Abstract: The present invention provides a communication device comprising an upper panel having a display unit disposed thereon, and a lower panel having a plurality of keys disposed thereon; and a stickup structure having a first rail disposed on the lower surface of the upper panel and a second rail disposed on the lower panel, the first rail engaging to the second rail, wherein the upper panel is moveable along the second rail and could be stickup by the stickup structure.

Abstract: The present invention provides a communication device comprising an upper panel having a display unit disposed thereon, and a lower panel having a plurality of keys disposed thereon; and a stickup structure having a first rail disposed on the lower surface of the upper panel and a second rail disposed on the lower panel, the first rail engaging to the second rail, wherein the upper panel is moveable along the second rail and could be stickup by the stickup structure.