Abstract: A control method includes: decoding a third Operand (OP) in a third Mode Register (MR) and a fourth OP in a first MR; and in response to the semiconductor memory being in a preset test mode, controlling, in a case where the third OP meets a first decoding condition, the impedance of a Data Mask (DM) pin to be a first value; or controlling, in a case where the third OP meets a second decoding condition, the impedance of the DM pin to be a second value according to the fourth OP; wherein the third OP is configured to indicate whether the DM pin is a test object in the preset test mode, and the fourth OP is configured to indicate whether the DM pin is enabled.

Abstract: Provided are a control circuit, a control method, and a memory. The control circuit includes: an input control circuit, configured to generate a first drive control signal and a second drive control signal based on a command/address control signal and a command/address inversion signal; an input processing circuit, configured to generate a first intermediate command/address signal based on the first drive control signal and the second drive control signal when the command/address control signal is in an enabled state, that the circuit is in a power down mode being indicated when the command/address control signal is in the enabled state; and a logic decoding circuit, configured to generate a power down mode exit signal in the power down mode based on the command/address inversion signal and the first intermediate command/address signal.

Abstract: Provided are a control circuit, a control method, and a memory. The control circuit includes: a flag signal generation circuit, configured to generate a command/address inversion flag signal based on a command/address control signal and an initial inversion flag signal; an input processing circuit, configured to generate a first intermediate command/address signal based on the command/address control signal and an initial command/address signal; and a logic decoding circuit, configured to: receive the first intermediate command/address signal and the command/address inversion flag signal, and generate a power down mode entry signal or a power down mode exit signal based on the command/address inversion flag signal and the first intermediate command/address signal.

Abstract: Embodiments of the present disclosure provide a control method, a semiconductor memory, and an electronic device. When the semiconductor memory is in a preset test mode, a first Model Register (MR) and a second MR related to a Data Pin (DQ) are allowed to directly define the impedance of a Data Mask Pin (DM). The DM does not need to add definition of an output driver state and a related control circuit for the preset test mode to ensure that the preset test mode is adapted to the DM. The impedance of the DM may be tested in the preset test mode to avoid circuit processing errors.

Abstract: An impedance calibration circuit including: a calibration circuit configured to receive a first calibration clock signal, to perform impedance calibration on a basis of the first calibration clock signal, and to output a first stop signal when the calibration is completed; a first detection circuit configured to detect calibration time of the impedance calibration circuit, and to output a second stop signal when the calibration time reaches a preset value; and a calibration control circuit configured to receive the first stop signal and the second stop signal and to output the first calibration clock signal. When the first stop signal or the second stop signal is received, the calibration control circuit stops outputting the first calibration clock signal.

Abstract: An oscillation period detection circuit and method, and semiconductor memory are provided. The oscillation period detection circuit includes an oscillator module, a control module, and a counting module. The oscillator module includes a target oscillator, and is configured to receive an enable signal and control the target oscillator to output an oscillation clock signal according to the enable signal; the control module is configured to receive the enable signal and the oscillation clock signal, and perform valid time reforming processing according to the oscillation clock signal and the enable signal to determine a target time; the counting module is configured to receive the enable signal and the oscillation clock signal, and perform period counting processing according to the enable signal and the oscillation clock signal to determine a target period number. The oscillation period of the target oscillator is calculated according to the target time and the target period number.

Abstract: A positioning system and method for a maglev train, the positioning system comprising an onboard magnet mounted at the bottom of a train, two grating arrays laid on train tracks side by side in the traveling direction of the train, an optical pulse generation module and a data processing module. The data processing module performs first-stage train positioning according to drift conditions of the center wavelengths of the marking gratings, performs second-stage train positioning according to drift conditions of the center wavelengths of the first grating array, and performs third-stage train positioning according to drift conditions of the central wavelengths of the second grating array, so as to determine the track positions where the train arrives step by step.

Abstract: A chip of a LED, comprising: a current blocking layer including a first current blocking layer grown along an epitaxial layer and a plurality of second current blocking layers disposed at one end of the first current blocking layer at intervals, the first current blocking layer gradually widens along a direction away from the second current blocking layers; a transparent conductive layer including a first transparent conductive layer and a second transparent conductive layer grown on the epitaxial layer, the first transparent conductive layer is grown on the current blocking layer and at least partially overlapped with the second current blocking layers; a metal finger electrode having a width gradually narrowed from the first end to the second end thereof and smaller than the width of the first current blocking layer, and the second current blocking layers are distributed around the first end of the metal finger electrode.

Abstract: This application provides a palm contour extraction method performed by a computer device. The method includes: obtaining bone point information respectively corresponding to palm bone points in a target palm image, the bone point information including bone point positions and bone point types; matching the palm bone points based on the bone point positions and the bone point types, to obtain a plurality of palm bone point sets, each palm bone point set having a corresponding geometry processing type for a corresponding set of palm bone points in the target palm image; determining a plurality of palm contour points from the plurality of palm bone point sets based on their respective geometry processing type; and generating a palm contour corresponding to the target palm image based on the plurality of palm contour points.

Abstract: An impedance calibration circuit, an impedance calibration method, and a memory are provided. The impedance calibration circuit includes a parameter module, an initial value generation module, and a calibration module. The parameter module is configured to perform environment detection processing and output an environment parameter signal; the initial value generation module is configured to receive the environment parameter signal, and output an initial calibration value based on the environment parameter signal when the calibration instruction signal is received; and the calibration module is configured to receive the initial calibration value, and perform impedance calibration processing based on the initial calibration value when the calibration instruction signal is received.

Abstract: A flexible support includes a first mounting channel for mounting a flexible water pipe, a second mounting channel for mounting a flexible supporting and positioning mechanism, a first connecting end, a second connecting end, and a support body. The support body capable of being bent and deformed. The support body coupled between the first connecting end and the second connecting end. The second mounting channel is located on one side of the first mounting channel. The first mounting channel and the second mounting channel respectively penetrate through the first connecting end, the support body and the second connecting end in sequence.

Abstract: Updates to a payment card of the specific card user that will affect subsequent payments to the COF merchants has occurred are detected based on receiving a notification from an issuer processor. In response, payment credentials can be automatically updated with the COF merchants for the specific card user.

Abstract: A purification method for a copper foil, which belongs to the field of material purification. The purification method for a copper foil comprises: placing an assembly in a central temperature zone of a tubular furnace, and annealing same for at least 5 h in a mixed atmosphere of an inert gas and hydrogen under the condition that the temperature of the central temperature zone is maintained at 1050-1070° C., so as to obtain a purified single-crystal copper foil, wherein the assembly is composed of a polycrystalline copper foil containing impurities and a carrier supporting the polycrystalline copper foil, the polycrystalline copper foil is a rolled copper foil, the flow of the inert gas is 500-600 sccm, and the flow of the hydrogen is 30-100 sccm.

Abstract: Disclosed is a method for preparing a titanium-containing ultra-low-carbon steel, comprising molten iron pretreatment, converter primary smelting, vacuum refining, continuous casting, hot rolling, pickling, and cold rolling. After vacuum refining decarbonization is finished, the content of free oxygen in molten steel is 100-350 ppm; after Al is then added for deoxidation treatment, the circulation time of the molten steel is greater than or equal to 3 min; after other alloys and rare earth elements are then added to the molten steel to adjust the components of the molten steel to the specifications of a finished product, the circulation time of the molten steel is greater than or equal to 2 min; and finally, an oxide Re2O3·Al2O3 is generated in the molten steel, and the vacuum refining is finished.

Abstract: A manufacturing method of a large-outer-diameter quartz crucible for a Czochralski (CZ) single crystal is provided. The manufacturing method is a vacuum arc method, and specifically includes: releasing a high-temperature arc with an electrode bundle composed of 2N+1 electrodes to fuse a crucible blank, and performing rapid cooling to form an initial quartz crucible product, where N is an integer greater than or equal to 2; the 2N+1 electrodes include one central main electrode and 2N auxiliary electrodes; the 2N auxiliary electrodes are equidistantly distributed on a circumference with the central main electrode as a center; the central main electrode is aligned at an axis of the crucible mold; the 2N auxiliary electrodes are connected to two phases of an industrial three-phase power, and the two phases are alternately arranged on the auxiliary electrodes; the central main electrode is connected to a remaining phase of the industrial three-phase power.

Abstract: A manufacturing method of a large-outer-diameter quartz crucible for a Czochralski (CZ) single crystal is provided. The manufacturing method is a vacuum arc method, and specifically includes: releasing a high-temperature arc with an electrode bundle composed of 2N+1 electrodes to fuse a crucible blank, and performing rapid cooling to form an initial quartz crucible product, where N is an integer greater than or equal to 2; the 2N+1 electrodes include one central main electrode and 2N auxiliary electrodes; the 2N auxiliary electrodes are equidistantly distributed on a circumference with the central main electrode as a center; the central main electrode is aligned at an axis of the crucible mold; the 2N auxiliary electrodes are connected to two phases of an industrial three-phase power, and the two phases are alternately arranged on the auxiliary electrodes; the central main electrode is connected to a remaining phase of the industrial three-phase power.

Abstract: A manufacturing method for high-quality quartz crucible uses a vacuum arc method to melt, the positioning of the graphite electrode and dwell time at each position meet following requirements in which: taking a position of an upper end surface of a mold opening as a zero point, an end of the graphite electrode is marked as + when above the zero point, marked as ? when below the zero point; a starting position of the graphite electrode is +0.10˜0.30 times an outer diameter of the crucible, dwell time ?2 minutes, then the position is descended sequentially in accordance with a stepwise positioning method, staying for a period of time every time descending to a position, the graphite electrode continuously releases a high-temperature arc to melt crucible blank during a corresponding period of time at a corresponding position, and reaches a bottom polishing position after moving at least 3 times.

Abstract: Disclosed are a brush head fixture for production of a toothbrush head and a manufacturing method of the toothbrush head. The brush head fixture includes a fixture main body, a bristle accommodating part, a material sealing surface, and one or more positioning holes. The bristle accommodating part is configured for accommodating the free end of implanted bristles in the process of manufacturing the toothbrush head. The material sealing surface is located on one side of the fixture main body away from the bristle accommodating part and configured for preventing the material of the coating layer from entering the bristle accommodating part when forming the coating layer. The positioning hole penetrates through the wall of the fixture main body between the material sealing surface and the bristle accommodating part. The positioning hole is configured for injection molding the retaining part, and also for positioning the retaining part obtained through injection molding.

Abstract: A receiver includes the following: a signal receiving circuit, including a first MOS transistor and a second MOS transistor, where a gate of the first MOS transistor is configured to receive a reference signal and a gate of the second MOS transistor is configured to receive a data signal, and the signal receiving circuit is configured to output a comparison signal, the comparison signal being configured to represent a magnitude relationship between a voltage value of the reference signal and a voltage value of the data signal; and an adjusting circuit, including a third MOS transistor, where a source of the third MOS transistor is connected to a source of the first MOS transistor, a drain of the third MOS transistor is connected to a drain of the first MOS transistor, and a gate of the third MOS transistor is configured to receive an adjusting signal.

Abstract: A voltage control method. A train traveling speed can be acquired; a target transformation ratio corresponding to the train traveling speed is determined according to correspondences between train traveling speeds and transformation ratios, the transformation ratio being a ratio of an input voltage to an output voltage; an input voltage is then transformed according to the target transformation ratio to obtain an output voltage, the output voltage being used for driving a train to travel. The correspondences between train traveling speeds and transformation ratios are obtained according to correspondences between train traveling speeds and train traction forces at different transformation ratios. By means of the method, the most suitable transformation ratio can be provided according to a traveling speed of a maglev train, thereby increasing the traction force of the maglev train and improving running efficiency.