Abstract: A metal product includes a metal substrate, at least one first hole, at least one second hole, and at least one third hole. The first hole is formed in a surface of the metal substrate. The second hole is formed in at least one of a portion of the surface of the metal substrate without the first hole and an inner surface defining the first hole. The third hole is formed in at least one of a portion of the surface of the metal substrate without the first hole and without the second hole, a portion of the inner surface defining the first hole without the second hole, and an inner surface defining the second hole. The first, second, and third holes enhance a bonding strength between the metal product and a material product. The disclosure also provides a metal composite and a method for manufacturing the metal product.

Abstract: The present disclosure relates a method for reducing animal weight, comprising administering to a patient in need thereof a therapeutically or prophylactically effective amount of a mulberry extract. The mulberry extract comprises: 3% to 99% of an alkaloid, 0.2% to 70% of a polysaccharide, 0% to 50% of an amino acid, 0% to 10% of flavone, and 0% to 25% of other components. The mulberry extract of the present disclosure can be used for controlling weight gain, and has a good therapeutic effect on type 2 diabetes with obesity.

Abstract: There are provided method, apparatus, device, and medium for determining update gradient for contrastive learning model. In the method, a gradient factor of a first type for the contrastive learning model is determined based on a first group of training data and a second group of training data for training the contrastive learning model. The gradient factor of the first type is not used for backpropagation during a training process. In a first stage of the training process, a gradient factor of a second type associated with the first group of training data is determined based on the contrastive learning model. The gradient factor of the second type is used for backpropagation during the training process. Gradient is obtained for updating the contrastive learning model based on the gradient factor of the first type and the gradient factor of the second type associated with the first group of training data.

Abstract: A method of training and applying contrastive learning model. The method includes obtaining a sample set and label information for training contrastive learning model, the sample set including a plurality of first samples of a first modality and a plurality of second samples of a second modality, the label information indicating a correlation between samples of the plurality of first samples and samples of the plurality of second samples; determining whether sample mixing is to be performed on the first modality or the second modality; in accordance with a determination that sample mixing is to be performed on the first modality, generating at least one first mixed sample of the first modality by mixing at least one pair of first samples among the plurality of first samples; and training the contrastive learning model at least based on the at least one first mixed sample and first mixed label information.

Abstract: A method of contrastive learning comprises: determining, based on a model construction criterion, a first encoder for a first modality and a second encoder for a second modality; constructing a first contrastive learning model, the first contrastive learning model comprising the first encoder and a third encoder for the second modality, and a model capacity of the third encoder being greater than a model capacity of the second encoder; performing pre-training of the first contrastive learning model based on a first training dataset for the first modality and the second modality; and providing the pre-trained first encoder in the pre-trained first contrastive learning model for a downstream task. Because only the model capacity of one encoder is increased in the pre-training stage, model performance may be improved without increasing model training overhead during downstream task fine-tuning and model running overhead during model application.

Abstract: A clock data recovery circuit and a clock data recovery method are provided. The clock data recovery circuit includes a time delay loop (100), a frequency locking loop (200) and a deserializer (300). The time delay loop (100) is configured to delay input data according to a phase of a clock signal to realize phase alignment; the frequency locking loop (200) is connected to the time delay loop (100), and is configured to adjust a frequency of the clock signal according to the delayed input data to make the frequency of the clock signal be consistent with a frequency of the input data; and the deserializer (300) is respectively connected to the time delay loop (100) and the frequency locking loop (200), and is configured to deserialize the input data according to the clock signal.

Abstract: Methods, apparatuses, a device, and a medium for training a contrastive learning model are provided. In a method, a plurality of sample sets for training the contrastive learning model are obtained, and the plurality of sample sets comprises a first sample set and a second sample set. A first target sample set is selected from the first sample set and the second sample set according to a predetermined rule. A first set of samples are determined based on the first target sample set according to a predefined batch size. The contrastive learning model is trained using the first set of samples. In this way, on the one hand, performance degradation of the contrastive learning model due to sample set bias may be avoided; on the other hand, a forgetting problem in the training process may be alleviated.

Abstract: A wireless repeater is in communication with a wireless communication device and a wireless access point (AP) and includes a packet transceiver circuit and a computing circuit. The computing circuit is configured to control the packet transceiver circuit to receive from the wireless communication device or the wireless access point a first frame that includes a first receiver address, a first transmitter address, a first destination address, and a first source address, and to control the packet transceiver circuit to send a second frame to the wireless AP or the wireless communication device, the second frame including a second receiver address, a second transmitter address, a second destination address, and a second source address. The first source address is identical to the second source address, the first destination address is identical to the second destination address, and the first receiver address is identical to the second transmitter address.

Abstract: A method for manufacturing a fixing belt for a wearable device, includes providing a flexible circuit board including a first area, a second area, and a pad in the first area; disposing an insulating layer on the flexible circuit board, the insulating layer being disposed in the second area; forming an electric conductive portion in the insulating layer; disposing a first protective layer and a second protective layer on opposite surfaces of the flexible circuit board, the electric conductive portion being between the flexible circuit board and the first protective layer; mounting an electronic component on the pad. A portion of the fixing belt containing the second area is a plug-in area, and the plug-in area is configured to be engaged with a device body of the wearable device, the electric conductive portion is disposed in the plug-in area.

Abstract: A method for determining a consistency coefficient of a power-law cement grout includes: determining a water-cement ratio of the power-law cement grout; according to engineering practice requirements, determining a time required to determine the consistency coefficient of the power-law cement grout; and obtaining the consistency coefficient of the power-law cement grout. The method is accurate and reliable, requires less calculation, etc.; and has very high practical value and popularization value in environmental protection and ecological restoration.

Abstract: A method for determining a three-dimensional tortuosity of a loose and broken rock-soil mass, includes the following steps: a particle grading curve of the loose and broken rock-soil mass is obtained by utilizing a particle size analysis, and followed by calculating an equivalent particle size and an average particle size; a porosity of the loose and broken rock-soil mass is obtained by utilizing a moisture content test, a density test, and a specific gravity test; the three-dimensional tortuosity of the loose and broken rock-soil mass is obtained by utilizing the equivalent particle size, the average particle size and the porosity of the loose and broken rock-soil mass. The method has the advantages of simple logic, accuracy and reliability, simple and fast parameter determination, and has high practical value and promotion value in the field of environmental protection and ecological restoration technology.

Abstract: The present invention discloses a hydrate energy-storage temperature-control material and a preparation method therefor. The material includes a refrigerant hydrate and a cross-linked polymer. The preparation method comprises the following steps: first, preparing a refrigerant hydrate by using a high-pressure reactor, and conducting grinding, crushing and sieving to obtain hydrate particles; then, uniformly spraying polytetrafluoroethylene suspended ultrafine powder onto the surface of the hydrate particles by using an electrostatic spraying device, and putting the hydrate particles into a plasma instrument to modify polytetrafluoroethylene so as to allow free radicals to be formed on the polytetrafluoroethylene powder surface; finally, subjecting monomers to graft polymerization with the free radicals on the polytetrafluoroethylene surface under the irradiation of a high-pressure mercury lamp of UV lighting system to stabilize the structure of the material, preparing a final product.

Abstract: A blank material for a ceramic tile consists of the following components in percentage by weight: nepheline powder: 10%-15%; clay with a carbon content of ?3.0 wt %: 10%-15%; clay with a carbon content of ?0.5 wt %: 15%-22%; clay with a carbon content between 0.5 wt % and 3.0 wt %: 10%-15%; recycled waste blank: 5%-10%; sodium potassium powder: 5%-10%; sodium feldspar powder: 12%-20%; desulfurization residue: 0%-7%; waste from edging and polishing: 15%-26%; waste porcelain powder: 5%-10%; liquid gel remover: 0.3%-1.0%; liquid reinforcing agent: 0.2%-0.8%. Its preparation method comprises the following steps: preparing raw materials for a blank body and ball milling, powder spray granulation, aging, pressing and molding of the blank body, drying, polishing the blank body, spraying water, glazing, applying a decorative pattern, firing.

Abstract: A heat insulation pad and method of making the same, battery assembly and device are provided. In some embodiments, the heat insulation pad includes silicon rubber and aerogel dispersed in the silicon rubber, wherein the heat insulation pad satisfies that: a temperature difference between a surface on one side of the heat insulation pad and a surface on the other side opposite to the one side is ?150° C., when the surface on one side of the heat insulation pad is contacted with hot surface having a temperature of 600° C. for 5 minutes under a pressure of 0.9 MPa followed by pressure relief and then is contacted with hot surface having a temperature of 600° C. for another 20 minutes. By using the heat insulation pad of the present disclosure, the safety performance of the battery assembly and of the device can be improved.

Abstract: A method for designing a distributed communication topology of a micro-grid based on network mirroring and global propagation rates includes the following steps: first, determining the communication connectivity of distributed directed networks in the micro-grid; next, obtaining, for connected directed communication networks, mirror networks thereof based on a mirroring operation, and selecting an optimal distributed directed communication topology corresponding to a maximum performance indicator based on algebraic connectivity and communication costs; solving, for the optimized distributed communication topology, pinned distributed generation sets corresponding to different pinning numbers based on global propagation rates and out-degrees; and finally, establishing a distributed secondary voltage control of the micro-grid based on the optimal distributed communication network and pinned nodes of the micro-grid, to achieve accurate reactive power sharing and average voltage restoration.

Abstract: An antenna module includes an inner circuit board, an antenna circuit board, an outer circuit board, and at least one chip. The inner circuit board includes at least one inner wiring layer and at least one inner dielectric layer. The antenna circuit board includes at least one antenna structure. The antenna circuit board and the outer circuit board are disposed on opposite sides of the inner circuit board. The inner wiring layer comprises at least one inner pad. At least one first opening passing through the outer circuit board is defined to expose the inner pad. Each chip is received in one first opening and electrically connects to the inner pad. The antenna structure electrically connects to the chip through the inner wiring layer. A method for manufacturing such antenna module is also provided.

Abstract: A multiple-pulses-in-air (MPiA) laser scanning system, wherein the MPiA problem is addressed in that an MPiA assignment of return pulses to send pulses of a laser scanner is based on range tracking and range probing at intermittent points in time. Each range probing comprises a time-of-flight arrangement which is constructed to be free of the MPiA problem. The invention further relates to an MPiA laser scanning system, wherein an MPiA ambiguity within a time series of return pulses, is converted into 3D point cloud space, which provides additional information from the spatial neighborhood of the points in question to enable MPiA disambiguation.

Abstract: A method for manufacturing a fixing belt for a wearable device, includes providing a flexible circuit board including a first area, a second area, and a pad in the first area; disposing an insulating layer on the flexible circuit board, the insulating layer being disposed in the second area; forming an electric conductive portion in the insulating layer; disposing a first protective layer and a second protective layer on opposite surfaces of the flexible circuit board, the electric conductive portion being between the flexible circuit board and the first protective layer; mounting an electronic component on the pad. A portion of the fixing belt containing the second area is a plug-in area, and the plug-in area is configured to be engaged with a device body of the wearable device, the electric conductive portion is disposed in the plug-in area.

Abstract: A scalable cloud-based data processing and computing platform to support a large volume data pipeline.