Abstract: A method for preparing 4-(hydroxymethylphosphinyl)-2-oxobutanoic acid, comprising the following steps: a) mixing 3-chloropropionyl chloride, a first solvent, trimethylsilyl cyanide and cyanide salt, performing a substitution reaction to obtain a material solution containing 4-chloro-2-oxobutyronitrile, then performing distillation under reduced pressure, and performing separation to obtain 4-chloro-2-oxobutyronitrile intermediate; b) subjecting the 4-chloro-2-oxobutyronitrile intermediate obtained in step a) and methyl phosphonite diester to Arbuzov reaction in a second solvent in the presence of cuprous iodide to obtain a material solution of (3-cyano-3-oxopropyl) methyl phosphinate, and performing purification to obtain crude (3-cyano-3-oxopropyl) methyl phosphinate; c) mixing the obtained crude (3-cyano-3-oxopropyl)methyl phosphinate with hydrochloric acid, performing hydrolysis reaction, and then performing purification treatment to obtain 4-(hydroxymethylphosphinyl)-2-oxobutanoic acid.

Abstract: The present invention provides a method for preparing 4-(hydroxymethylphosphinyl)-2-oxobutanoic acid, comprising the following steps: a) mixing acryloyl chloride, a first solvent, a polymerization inhibitor, a catalyst and potassium ferrocyanide, performing a substitution reaction, and performing distillation under reduced pressure to obtain an acryloyl cyanide intermediate; b) mixing the acryloyl cyanide intermediate obtained in step a) with hydrochloric acid and a polymerization inhibitor, performing a hydrolysis reaction, and then performing purification treatment to obtain crude 2-carbonyl-3-butenoic acid; c) mixing the crude 2-carbonyl-3-butenoic acid obtained in step b) with a second solvent and methyldichlorophosphine, and performing an addition reaction to obtain a solution containing diacyl chloride; d) mixing the solution containing diacyl chloride obtained in step c) with water, performing a hydrolysis reaction, and performing purification to obtain 4-(hydroxymethylphosphinyl)-2-oxobutanoic acid.

Abstract: Provided is a method for preparing 4-(hydroxymethylphosphinyl)-2-oxobutanoic acid, comprising the following steps: a) mixing methylphosphonite diester, carboxylic acid and acryloyl cyanide, performing addition reaction, and performing distillation under reduced pressure to obtain a material solution of (3-cyano-3-carbonylpropyl)methylphosphonate; b) mixing the material solution of (3-cyano-3-carbonylpropyl)methylphosphonate obtained in step a) with water uniformity, cooling to 10° C.-40° C., then adding hydrochloric acid dropwise for acidification, and after the dropwise addition being completed, continuing stirring for 0.1 h-1 h, then performing hydrolysis reaction, and finally performing purification treatment to obtain 4-(hydroxymethylphosphinyl)-2-oxobutanoic acid. In the provided preparation method, cyanation reaction is not required, which avoids the use of cyclic phosphonic anhydride that is high in cost and difficult to obtain and the highly toxic sodium cyanide.

Abstract: Disclosed are a control method for a bidirectional DC converter, a control module for a bidirectional DC converter, a bidirectional DC converter, and a non-transitory computer-readable storage medium. The control method includes: determining an operating mode of the bidirectional DC converter according to an input voltage and an output voltage; respectively determining a duty cycle of a drive signal of the first switch transistor, a duty cycle of a drive signal of the second switch transistor, a duty cycle of a drive signal of the third switch transistor, and a duty cycle of a drive signal of the fourth switch transistor according to the operating mode of the bidirectional DC converter; and providing drive signals to gates of the first switch transistor, the second switch transistor, the third switch transistor and the fourth switch transistor respectively.

Abstract: A command processing method includes: receiving a first command in a case where there is at least one configured or activated BWP for the terminal device, and there is ongoing random access on at least one BWP in the at least one configured or activated BWP, the first command including at least one of a BWP activation command or a BWP deactivation command; and processing the first command according to a preset processing manner. The BWP activation command is used to instruct the terminal device to activate a third BWP, the BWP deactivation command is used to instruct the terminal device to deactivate a fourth BWP, the fourth BWP is BWPs in the at least one configured or activated BWP, and the third BWP is BWPs except the at least one configured or activated BWP.

Abstract: A ripple detection device and a ripple suppression device. The ripple detection device includes: a ripple sampling unit, at least two DC sampling units, and a digital signal processing unit; the ripple sampling unit outputs a first voltage signal at an output port of a non-isolated DC/DC bidirectional energy conversion unit to the digital signal processing unit; the DC sampling unit outputs a first DC signal in a second voltage signal at a connected port of the non-isolated DC/DC bidirectional energy conversion unit to the digital signal processing unit and blocks an AC signal in the second voltage signal to be output to the digital signal processing unit; the digital signal processing unit determines a ripple noise signal at the output port of the non-isolated DC/DC bidirectional energy conversion unit according to the first voltage signal and the first DC signal.

Abstract: An apparatus and method, the method including receiving, by a terminal device, first configuration information from a network device, where the first configuration information indicates a second reporting mode, and the second reporting mode indicates to feed back hybrid automatic repeat request (HARQ-ACK) information based on a negative acknowledgment only (NACK-only), and when determining that a resource set overlaps a unicast uplink resource, sending, by the terminal device, the HARQ-ACK information for a multicast service to the network device in a first reporting mode, where the first reporting mode indicates to feed back the HARQ-ACK information based on an acknowledgment (ACK) or a NACK, the resource set comprises a plurality of multicast physical uplink control channel (PUCCH) resources, and the unicast uplink resource comprises a unicast PUCCH resource or a unicast physical uplink shared channel (PUSCH) resource, and the HARQ-ACK information comprises an ACK value or a NACK value.

Abstract: A method for reducing inline directivity of an air-gun source signature by optimizing spatial distribution of air-guns is provided according to the present application, which relates to a field of design and optimization of an air-gun source. An evaluation standard in the air-gun distribution in an air-gun array direction is proposed. By a combination optimization along both the inline and depth directions, a design scheme having evidently broader effective bandwidth and effective take-off angle width than a design scheme of a conventional source is obtained, with which the directivity of the air-gun source signature can be reduced.

Abstract: Devices, methods, and non-transitory computer readable media are disclosed herein to repair or mitigate the appearance of unwanted reflection artifacts in captured video image streams. These unwanted reflection artifacts often present themselves as brightly-colored spots, circles, rings, or halos that reflect the shape of a bright light source in the captured image. These artifacts, also referred to herein as “ghosts” or “green ghosts” (due to often having a greenish tint), are typically located in regions of the captured images where there is not actually a bright light source located in the image. In fact, such unwanted reflection artifacts often present themselves on the image sensor across the principal point of the lens from where the actual bright light source in the captured image is located. Such devices, methods and computer readable media may be configured to detect, track, and repair such unwanted reflection artifacts in an intelligent and efficient fashion.

Abstract: A method for resource configuration includes determining that a first resource and a second resource are multiplexed in a first target mode. The first resource is a candidate resource, on the SL, configured to transmit control information. The second resource is a candidate resource, on the SL, configured to transmit data. The first target mode is time-division multiplexing (TDM) or frequency-division multiplexing (FDM).

Abstract: A command processing method is used to solve a problem that the terminal device cannot process a BWP switching command, a BWP activation command or a BWP deactivation command that is received in a case where there are a plurality of BWPs simultaneously activated for the terminal device, and there is ongoing random access on one or more BWPs in the activated plurality of BWPs. The method includes: receiving a first command in a case where there is at least one configured or activated BWP for the terminal device, and there is ongoing random access on at least one BWP in the at least one configured or activated BWP, the first command including at least one of the BWP switching command, the BWP activation command or the BWP deactivation command; and processing the first command according to a preset processing manner.

Abstract: A voltage conversion circuit, a control method, a power supply device, and a storage medium are provided. The circuit may include a fourth switch module, a third switch module, a first switch module, a second switch module and a ground lead which are sequentially connected in series; a first capacitor connected to a first common terminal and a second common terminal respectively; a second capacitor connected to a power output terminal and a ground lead; a driving module configured to regulate an initial duty ratio of a driving signal for each of the first to fourth switch modules, based on a capacitor voltage of both ends of the first capacitor; and an inductor connected with a power input terminal and a third common terminal respectively, or connected with the third common terminal and the power output terminal respectively.

Abstract: A method for processing communication range information and a terminal are provided. The method includes: receiving the communication range information of a service data unit from an application layer; determining target information according to the communication range information; and transmitting the target information to a base station.

Abstract: Embodiments of the present disclosure provide a method for controlling a BWP inactivity timer and a terminal device. The method includes: controlling, in a case where there is at least one configured or activated BWP for the terminal device, a BWP inactivity timer of each BWP in the at least one configured or activated BWP according to a preset processing mode or a network configuration mode, the preset processing mode or the network configuration mode being to start the BWP inactivity timer, or restart the BWP inactivity timer, or not start the BWP inactivity timer, or stop the BWP inactivity timer.

Abstract: A spindle power-on device for a mechanical discharge compound machine tool mounted on a spindle, includes a copper bush, a gear plate, bevel gears, electric bush assemblies, a chuck housing, a supporting plate, a mounting plate and a power device.

Abstract: Various embodiments include implementing optical image stabilization (OIS) in a camera module. For example, a controller may control an actuator of the camera module to move a lens group and/or an image sensor of the camera module to provide OIS movement. In various embodiments, OIS movement control is implemented according to a region-based blur reduction model that effects a greater reduction in blur associated with a target region of an image sensor, relative to one or more other regions of the image sensor.

Abstract: A kitchen faucet comprises a faucet body, a control valve, a solenoid valve, and a pull-out head. The faucet body comprises a first water inlet pipe, a second water inlet pipe, a first water outlet pipe configured to be in communication with the first water inlet pipe, and a second water outlet pipe configured to be in communication with the second water inlet pipe. The pull-out head is pluggably matched with the faucet body and is in communication with the first water outlet pipe. The control valve is disposed on the faucet body and is configured to control the first water outlet pipe to be opened and closed, and the solenoid valve is disposed on the second water inlet pipe to control the second water outlet pipe to be opened and closed.

Abstract: A double-waterway faucet structure is provided. A faucet body comprises a first water inlet passage, a second water inlet passage, and a first water outlet passage configured to be in communication with the first water inlet passage, and the first water outlet passage is connected to a pull-out head. A control valve is disposed on the faucet body and is configured to control a turning ON and OFF between the first water inlet passage and the first water outlet passage. A rotating bracket is rotatably disposed on the faucet body and comprises a second water outlet passage configured to be in communication with the second water inlet passage, and a solenoid valve is disposed on the second water inlet passage to control a turning ON and OFF of the second water outlet passage.

Abstract: This disclosure provides a RACH resource selection method, a RACH resource configuration method, user equipment, and a network-side device. The RACH resource selection method is applied to the user equipment and includes: after a random access process is triggered, selecting, based on obtained RACH resource configuration information, a PRACH transmit unit used for sending a preamble or a preamble and data.

Abstract: A measurement method, user equipment, and a network side device are provided. The method includes: receiving first measurement configuration information sent by a network side device, where the first measurement configuration information specifies a measurement to be performed by the user equipment; performing the measurement when the user equipment is in an inactive mode or an idle mode different from the inactive mode based on the first measurement configuration information to obtain a measurement result, where the first measurement configuration information is used at least in the inactive mode; and when the user equipment switches from the inactive mode to the idle mode and a measurement timer does not expire, clearing the first measurement configuration information.