Abstract: A mounting apparatus for fixing a data storage device to a bottom plate includes a receiving frame for receiving the data storage device having a number of hooks extending from a bottom of the receiving frame, a supporting member configured to be fixed to the bottom plate and support the receiving frame, a sliding member slidably coupled to the supporting member and defining a number of through holes for the hooks extending through and having a number of latching tabs extending down from inside walls of the sliding member bounding the through holes, and an elastic member capable of restoring the sliding member. Wherein the hooks urge against the latching tabs to slide the sliding member to deform the elastic member, when the hooks slide over the latching tabs, the elastic member elastically recovers making the hooks hook the latching tabs.

Abstract: The present disclosure provides a display apparatus including: a touch display region; a display driving module, configured to load a display driving signal to a first subregion of the touch display region, so as to enable the first subregion to be in a displaying state; a trigger signal generation module, configured to generate a trigger signal when the display driving module loads the display driving signal to the first subregion of the touch display region; and a touch driving signal generation module, configured to load a touch driving signal to touch driving electrodes in each of the other one or more subregions except the first subregion of the touch display region based on the received trigger signal, so that each of the other one or more regions is in a touch detection state while the first subregion is in the displaying state.

Abstract: The disclosure discloses a method and device for performing peak clipping to multiple carrier waves, the method includes: according to carrier wave number of configured multiple carrier waves, signal bandwidth and occupied bandwidth of each carrier wave, obtaining total signal bandwidth and total occupied bandwidth of the corresponding carrier waves; according to the total signal bandwidth and the total occupied bandwidth of the multiple carrier waves, generating a digital filter with set order, and obtaining filter coefficient of the digital filter; taking the filter coefficient as a peak clipping coefficient and using the peak clipping coefficient to perform peak clipping to the peak-to-average ratio signals of the carrier waves. By the disclosure, the complexity of the generation of the peak clipping coefficient is simplified, the deterioration degree of EVM is reduced, and the distortion degree of signals is also reduced.

Abstract: The present application relates to the field of digital pre-distortion processing. Disclosed in an embodiment of the present application are a pre-distortion parameter obtaining method and pre-distortion system for simplifying calculating complexity of a model while achieving good signal processing effect. The method comprises: after the beginning of periodic filtering processing, obtaining a pre-distorted signal after pre-distortion processing and a first feedback signal after power amplification (S101); obtaining a second feedback signal by eliminating the rated linear gain of the first feedback signal (S102); determining a pre-distortion parameter according to a matrix formed by the second feedback signal and a matrix formed by the pre-distorted signal (S103); updating the pre-distortion parameter index table according to the determined pre-distortion parameter (104).

Abstract: The invention discloses an air outlet protection structure, an outdoor unit of an air conditioner and a method for designing an air outlet protection structure. The air outlet protection structure comprises: a central circular disk (10); and a radiating rib (20), extending from an outer edge of the central circular disk (10) to a direction away from the central circular disk (10). An included angle between a first side surface (21) of the radiating rib (20) and a central axis of the central circular disk (10) is a, as formula (I). The invention is determined according to the characteristics of a flow field of an air duct, and can reduce the hindering effect of an air outlet protection apparatus on a fluid as far as possible, thereby improving the air output volume of a fan and reducing the noise of the entire outdoor unit of the air conditioner.

Abstract: A digital predistortion processing method and system comprises extracting from a predistortion coefficient parameter table a predistortion parameter corresponding to an input signal, so as to predistort the input signal and obtain a forward transmission signal; amplifying the power of the forward transmission signal to obtain an output signal; acquiring the output signal to obtain a feedback signal; delaying a predetermined number of sampling points so as to acquire the forward transmission signal and obtain a reference signal; conducting synchronization-related calculation on the reference signal and the feedback signal, and calibrating the feedback signal; training a predistortion coefficient according to the reference signal and the calibrated feedback signal; and forming the predistortion coefficient parameter table according to the predistortion coefficient and the amplitude of the input signal.

Abstract: The invention is a method and a system for updating pre-distortion coefficients, which is used to solve the problem of interference with neighbor cells due to the inferior pre-distortion coefficients. The method includes: presetting a primary table and a standby table, which store default and updated pre-distortion coefficients respectively; when a data source of a pre-distortion processor adopts the standby table, adopting the updated pre-distortion coefficients to perform parameter output processing to acquire pre-distortion parameters, and conveying the pre-distortion parameters and an input signal to the pre-distortion processor to process to acquire pre-distortion signals; conveying the pre-distortion signals through various signal processors to acquire a first signal, and determining the power data of the first signal; and based on the comparing result of the power data of the first signal and a setting range, there are different actions.

Abstract: In a method and medical equipment for selecting a scanning protocol set, a preset virtual scanned object model including multiple scanned areas is loaded into a computer. The virtual scanned object model is a graphic or image model. A scanned area is selected by use of the virtual scanned object model. A default scanning protocol is set corresponding to the selected scanned area according to a preset correlation between the scanned area and the scanning protocol set, so as to complete the selection of the scanning protocol set.

Abstract: The disclosure discloses a method and device for performing peak clipping to multiple carrier waves, the method includes: according to carrier wave number of configured multiple carrier waves, signal bandwidth and occupied bandwidth of each carrier wave, obtaining total signal bandwidth and total occupied bandwidth of the corresponding carrier waves; according to the total signal bandwidth and the total occupied bandwidth of the multiple carrier waves, generating a digital filter with set order, and obtaining filter coefficient of the digital filter; taking the filter coefficient as a peak clipping coefficient and using the peak clipping coefficient to perform peak clipping to the peak-to-average ratio signals of the carrier waves. By the disclosure, the complexity of the generation of the peak clipping coefficient is simplified, the deterioration degree of EVM is reduced, and the distortion degree of signals is also reduced.

Abstract: A thermal module includes a shell, a plurality of fans assembled in the shell, and a plurality of louvers. The shell defines a plurality of openings corresponding to the fans. Each louver includes a frame coupled to one of the vents and a plurality of louver boards. A side edge of each louver board extends outward forming a shaft rotatably coupled to two opposite sides of the frame. The gravity center of the frame is configured adjacent to an end of the frame, which is away from the shaft.

Abstract: A single-end amplifier includes: a noise cancelling circuit, coupled to a power supply, configured to receive a power signal and to cancel a part of ripples and noises in the power signal to generate an initial signal; an amplifying circuit, configure to receive the initial signal at a first end of the amplifying signal, and to amplify the initial signal to generate a first signal at a second end; and a first transmitting circuit, configured to receive the power signal and to generate a second signal at the second end of the amplifying circuit. The first signal and the second signal are superimposed and outputted to cancel most part of the ripples and noises in the power signal. The noise cancelling circuit includes a first capacitor and a first choke coil.

Abstract: A housing includes a substrate made of aluminum or aluminum alloy, an anodic oxide film disposed on the substrate, and an abrasion resisting layer disposed on the anodic oxide film. The abrasion resisting layer is an alkylate silicon dioxide layer containing nano aluminum oxide powder. An electronic device using the housing is also described.

Abstract: Disclosed are a method and a system for updating a multi-frequency band pre-distortion coefficient lookup table, in order to solve the problems that the calculation complexity is high. Wherein, the method comprises: collecting a first frequency band reference signal and a first frequency band feedback signal, a second frequency band reference signal and a second frequency band feedback signal; calculating a first frequency band pre-distortion coefficient and a second frequency band pre-distortion coefficient; performing phase calibration on the first frequency band pre-distortion coefficient and the second frequency band pre-distortion coefficient, respectively; and updating a first lookup table according to the first frequency band pre-distortion coefficient performed the phase calibration, and updating a second lookup table according to the second frequency band pre-distortion coefficient performed the phase calibration.

Abstract: Disclosed is a method and a system for switching pre-distortion coefficients, which is used to solve the problem of interference with neighbor cells due to the inferior pre-distortion coefficients. The method comprises: presetting a primary table and a standby table, wherein the primary table stores default pre-distortion coefficients and the standby table stores updated pre-distortion coefficients; when a data source of a pre-distortion processor adopts the standby table, adopting the updated pre-distortion coefficients to perform parameter output processing to acquire pre-distortion parameters, and conveying the pre-distortion parameters and an input signal to the pre-distortion processor to process to acquire pre-distortion signals; conveying the pre-distortion signals through various signal processors to acquire a first signal, and determining the power data of the first signal; and based on the comparing result of the power data of the first signal and a setting range, there are different actions.

Abstract: A digital predistortion processing method and system comprises extracting from a predistortion coefficient parameter table a predistortion parameter corresponding to an input signal, so as to predistort the input signal and obtain a forward transmission signal; amplifying the power of the forward transmission signal to obtain an output signal; acquiring the output signal to obtain a feedback signal; delaying a predetermined number of sampling points so as to acquire the forward transmission signal and obtain a reference signal; conducting synchronization-related calculation on the reference signal and the feedback signal, and calibrating the feedback signal; training a predistortion coefficient according to the reference signal and the calibrated feedback signal; and forming the predistortion coefficient parameter table according to the predistortion coefficient and the amplitude of the input signal.

Abstract: A method for suppressing harmonic signals includes: mixing a first local oscillation signal with an input signal to obtain a first output signal, and mixing a second local oscillation signal with the input signal to obtain a second output signal, the first output signal including an n-order harmonic signal, n being a positive integer greater than 1; and adding the first output signal and the second output signal to suppress the n-order harmonic signal in the first output signal. The first local oscillation signal and the second local oscillation signal have different mark-space ratios but a same oscillation frequency.

Abstract: A method for signal processing is provided. The method includes: obtaining a predistortion signal for compensating nonlinear distortion generated by a transmission path; adding the predistortion signal to the transmission path to compensate the nonlinear distortion; and outputting the nonlinear distortion compensated signal by the transmission path. With the above method, the nonlinear distortion of the transmission path can be compensated without modifying a current transmission path, thereby enhancing transmission performance of a transmitter by using a simple structure.

Abstract: Provided are a level shifter and a digital to analog converter, which can make a minimum value of an output voltage be greater than 0. In the circuit, sources of a first field effect transistor and a second field effect transistor are connected to a first direct current power supply; a drain of the first field effect transistor and a gate of the second field effect transistor are connected to one terminal of a first capacitor; a connecting end formed after the other terminal of the first capacitor is connected to an input end of a phase inverter is used as a digital signal input end; a gate of the first field effect transistor, a drain of the second field effect transistor, a source of a third field effect transistor, and a source of a fifth field effect transistor are connected to one terminal of a second capacitor.

Abstract: Provided are a level shifter and a digital to analog converter, which can make a minimum value of an output voltage be greater than 0. In the circuit, sources of a first field effect transistor and a second field effect transistor are connected to a first direct current power supply; a drain of the first field effect transistor and a gate of the second field effect transistor are connected to one terminal of a first capacitor; a connecting end formed after the other terminal of the first capacitor is connected to an input end of a phase inverter is used as a digital signal input end; a gate of the first field effect transistor, a drain of the second field effect transistor, a source of a third field effect transistor, and a source of a fifth field effect transistor are connected to one terminal of a second capacitor.

Abstract: Disclosed are a method and a system for updating a multi-frequency band pre-distortion coefficient lookup table, in order to solve the problems that the calculation complexity is high. Wherein, the method comprises: collecting a first frequency band reference signal and a first frequency band feedback signal, a second frequency band reference signal and a second frequency band feedback signal; calculating a first frequency band pie-distortion coefficient and a second frequency band pre-distortion coefficient; performing phase calibration on the first frequency band pre-distortion coefficient and the second frequency band pre-distortion coefficient, respectively; and updating a first lookup table according to the first frequency band pre-distortion coefficient performed the phase calibration, and updating a second lookup table according to the second frequency band pre-distortion coefficient performed the phase calibration.