Abstract: A neural network-based method for predicting aerodynamic performance of a compressor of modeling design and a system therefor are provided. The method includes: constructing a data set; constructing a loss function, wherein the loss function is constructed based on a similarity modeling criterion; training a momentum-optimized neural network model according to the data set and the loss function to obtain an aerodynamic performance prediction model of the compressor of modeling design; predicting an aerodynamic performance of the compressor of modeling design by using the aerodynamic performance prediction model of the compressor of modeling design. According to the method, the momentum-optimized neural network model is trained by using the constructed data set and the loss function constructed based on the similarity modeling criterion, and the deep learning technology is applied to the aerodynamic performance prediction of the compressor of modeling design.

Abstract: Embodiments of the present disclosure relate to a method, an apparatus, an electronic device, and a computer program product for determining similarity. The method includes obtaining a first program statement and a second program statement. The method also includes generating a first heterogeneous diagram corresponding to the first program statement and a second heterogeneous diagram corresponding to the second program statement. In addition, the method also includes determining the similarity between the first program statement and the second program statement based on the first heterogeneous diagram and the second heterogeneous diagram. Therefore, with the solution proposed in the embodiments of the present disclosure, a program statement can be converted into a heterogeneous diagram to calculate similarity through heterogeneous diagram matching.

Abstract: The application provides a wheel alignment calibration device and a wheel alignment apparatus. The wheel alignment calibration device includes: a calibration box, a calibration component located in the calibration box, and a fixing member connected to the calibration box; the calibration box defines a calibration direction, the calibration box is provided with a calibration space and a calibration opening communicated with the calibration space. The calibration component is located in the calibration space and can be exposed to the calibration opening in the calibration direction. The fixing member is configured to fix the calibration box on the lift carrying the vehicle, so that the opening direction of the calibration opening is set obliquely downward, and the wheel alignment calibration device is configured to achieve calibration based on the calibration direction through the calibration component.

Abstract: An electric step with a locking function includes a step, a telescoping mechanism, and a locking device. The step is adapted to be mounted on a vehicle, and the telescoping mechanism is mounted on the vehicle and coupled to the step. The telescoping mechanism is configured to drive the step to move between a first position and a second position relative to the vehicle. When the step is in the first position, the step exhibits an extended state. When the step is in the second position, the step exhibits a retracted state. There is an angle between the first position and the second position. The locking device is arranged on the telescoping mechanism, and the locking device is configured to lock the step at the first position, the second position, or any position between the first position and the second position.

Abstract: The present application provides a memory block, a memory device, and a memory cell. The memory block includes a memory array, including a plurality of memory cells distributed in a a three-dimensional array. The memory array includes a plurality of memory subarray layers, and each memory subarray layer includes a drain region semiconductor layer including a plurality of drain region semiconductor strips, a channel semiconductor layer including a plurality of channel semiconductor strips, and a source region semiconductor layer including a plurality of source region semiconductor strips. A plurality of gate strips are arranged on each side of the drain region semiconductor strip, channel semiconductor strip, and source region semiconductor strip. A part of the gate strip, a corresponding part of the channel semiconductor strip, a part of the drain region semiconductor strip, and a part of the source region semiconductor strip are configured to form a memory cell.

Abstract: An inspection system includes a controller including a memory maintaining program instructions and one or more processors configured to execute the program instructions. The program instructions cause the one or more processors to generate a geometric model of a structure of a sample, generate an optical response function model of the structure of the sample to illumination based at least in part on the geometric model, receive measured data from a detector, generate a parametric sub-structure model based on at least the optical response function model and the measured data, and extract one or more parameters of the structure based on the measured data.

Abstract: An apparatus for communicating across an isolation barrier includes a differential pair of input terminals. The apparatus includes a bandpass filter circuit configured to receive a received signal on the differential pair of input terminals and to provide a received differential signal on a differential pair of nodes. The apparatus includes a demodulator directly coupled to the bandpass filter circuit and configured to directly demodulate the received differential signal on the differential pair of nodes to provide a demodulated received signal.

Abstract: The disclosed embodiments are directed to preventing the writing of malformed cryptographic keys to a memory device. In one embodiment, a system is disclosed comprising a storage array, the storage array storing a first cryptographic key; and a processor configured to: receive a command from a host processor, the command including a second cryptographic key, a first signature, a second signature, and at least one field, determine that the first signature is valid using the second cryptographic key and the at least one field, determine that the second signature is valid using the first cryptographic key, the first signature and the at least one field, and replace the first cryptographic key with the second cryptographic key after determining that both the first signature and second signature are valid.

Abstract: Provided are a model construction method and apparatus, a device, and a medium. The method includes the following: a physiological model structure for describing a drug in vivo process is established according to physiological prior knowledge and anatomical prior knowledge (S110); for each organism in a preset organism set, a physiological parameter, an anatomical parameter, and drug in vivo behavior data after the organism uses a specific drug are acquired as sample data (S120); and a pre-created original prediction model is trained based on the sample data and the physiological model structure to obtain a corresponding target prediction model (S130).

Abstract: The present disclosure relates to laser hybrid welding device and method for aluminum alloy based on in-situ self-generated reinforcing particle, comprises a fiber laser, a control system, a laser hybrid welding device, a powder feeder and a semiconductor laser. The laser hybrid welding device comprises a gantry crane, a partition, a first guide rail, a second guide rail, a workbench, a first laser welding head and a second laser welding head. The first laser welding head is connected to the semiconductor laser, and the second laser welding head is connected to the fiber laser. The powder feeder can accurately control the conveying speed and proportion of the powder to ensure that the powder particles are located at the to-be-welded position. A semiconductor laser is used for irradiating a to-be-welded position, and a high-temperature condition is generated, so that the particle reinforced phase is promoted to be generated in situ.

Abstract: In some aspects, the techniques described herein relate to a device including: a storage device, the storage device including a first physically unclonable function (PUF) and configured to generate a storage device public key and a storage device private key; and a secure environment, the secure environment including a controller configured for: transmitting a nonce value to the storage device; receiving a response from the storage device, the response including a unique identifier (UID) and a digital signature, the digital signature generated using the UID and the nonce value; validating the digital signature using a public key of the storage device; and issuing a command to the storage device after validating the digital signature.

Abstract: The present disclosure provides a control method for goods retrievement and storage, a control apparatus, and a transport robot. The control method for goods retrievement includes: receiving a retrievement instruction, and acquiring locating information of target goods according to the retrievement instruction; moving a transport robot to a target position according to the locating information; obtaining status information of the target goods and/or position relationship information between a carrying apparatus and the target goods; and adjusting a position and posture of the carrying apparatus according to the status information and/or the position relationship information, and causing the carrying apparatus to take out the target goods.

Abstract: An electric drill and an electric tool, including: a housing provided with an air inlet and an air outlet; a motor received in the housing, wherein the motor at least comprises a motor shaft; a drill bit, acting on a workpiece; the motor shaft is connected to the drill bit; a gearbox arranged in the housing for accommodating the transmission assembly; a fan supported by the motor shaft; wherein the gearbox is formed with a passage, and at least a part of a flow path of an airflow that enters the housing from the air inlet and flows out of the housing from the air outlet is provided on the passage.

Abstract: A grating regulating device includes: a first substrate, a conductive layer, a dielectric layer and a second substrate arranged in stack, the conductive layer includes a wiring layer, a first insulating layer and a first electrode layer arranged in stack, the wiring layer includes a plurality of driving lines, and the first electrode layer includes a plurality of sub-electrodes arranged in a first direction. The driving lines are for transmitting a driving signal to the sub-electrodes, and the sub-electrodes are for, by the effect of the driving signal, driving corresponding positions of the dielectric layer to be light-transmitting or opaque. The grating regulating device includes a grating region including a plurality of common-signal units, each of the common-signal units includes at least one grating unit, the grating unit includes a plurality of sub-electrodes, and the plurality of sub-electrodes located in the same grating unit are connected to different driving lines.

Abstract: A circular sprinkler irrigation all-in-one machine capable of spraying water, fertilizer, and pesticide includes a sprinkler irrigation frame and a storage pesticide box disposed at a side of the sprinkler irrigation frame, and a top end of the sprinkler irrigation frame is fixedly connected to a lower connecting seat. The operator control the machine through a control panel to uniformly spray and irrigate crops, an area of spraying water, pesticide and fertilizer can be adjusted according to the area of crops, effectively saving water, fertilizer and pesticide resources, accurate fertilization or spraying pesticide can be achieved according to different crops, the integration of a water pipeline and a first electric power line with a main sprinkler irrigation pipe ensures that the spraying operation can be carried out regularly and continuously during rotary spraying, avoiding line entanglement, improving device versatility, overall spraying accuracy and the neatness of the device line.

Abstract: The present invention provides a downward drawing paper bag for easy access to paper, belonging to the technical field of daily necessities, comprising a bag body, wherein a hanging strip is integrally formed on the top of the bag body, and a groove is hot pressed on the outer surface of the hanging strip. An auxiliary hole is opened on the outer side of the hanging strip, and the two auxiliary holes are opened in relative positions. A hanging hole is opened at the center of the outer side of the hanging strip, and the shape of the bag body is rectangular.

Abstract: In some aspects, the techniques described herein relate to a device including: a processor; and a storage medium for tangibly storing thereon logic for execution by the processor, the logic including instructions for: storing a group digital certificate, the group digital certificate including a plurality of unique identifier (UID) values and a plurality of corresponding public keys; receiving onboarding data and a digital signature from a client device, the onboarding data including a UID of the client device and a public key of the client device and the digital signature generated using the onboarding data and a private key corresponding to the public key; validating the digital signature using the public key; confirming that the UID matches at least one UID in the group digital certificate; and onboarding the client device.

Abstract: The present invention provides a central open circular paper drawer, belonging to the technical field of daily necessities, comprising an extraction drawer. The outer side of the extraction drawer is provided with a paper outlet, which is circular and has tear lines around it. The top of the extraction drawer is integrally formed with a hanging belt, and the outer surface of the hanging belt is provided with an indentation groove. The present invention features easy to tear lines around the paper outlet, allowing consumers to easily and neatly tear open the packaging for convenient access to tissue paper; The hanging strap and its indentation groove enhance the stability and durability of the suspension; The side hanging mouth and kneading piece provide diverse hanging methods to meet the needs of different scenarios; The central hanging hole optimizes the suspension balance, avoiding tilting or falling; The pattern display surface N enhances the visual appeal and brand recognition of the product.

Abstract: An acceleration sensor, including a base; anchor point; an inner side supporting unit, a middle part of which is fixed to the base through the anchor point, a first seesaw unit elastically connected to an outer side of a first end of the inner side supporting unit; a second seesaw unit elastically connected to an outer side of a second end of the inner side supporting unit; and an out-of-plane displacement detection unit. Each of the first seesaw unit and the second seesaw unit is symmetrically distributed about a symmetry axis of the acceleration sensor. The first seesaw unit includes two first seesaw structures at two sides of the symmetry axis and the second seesaw unit includes two second seesaw structures at two sides of the symmetry axis. An influence of Y-axis angular acceleration on the acceleration sensor is greatly reduced and a cross inhibition ratio thereof is improved.