Abstract: Embodiments of this specification provide methods and apparatuses for performing model ownership verification based on an exogenous feature. An implementation of the methods includes: selecting initial samples from an initial sample set to form a selected sample set, processing sample data of the initial samples to obtain transform samples that form a transform sample set, training a meta-classifier based on a target model, an auxiliary model, and the transform sample set, inputting data associated with a suspicious model into the meta-classifier, and determining, based on an output result of the meta-classifier, whether the suspicious model is stolen from a deployment model, wherein the deployment model has feature knowledge of the exogenous feature.

Abstract: The invention discloses a powder leakage monitoring device and a powder leakage monitoring method. The powder leakage monitoring device comprises light field camera, 3D PTZ (3-Dimensional Pan/Tilt/Zoom) and computer. Wherein, the light field camera records original light field images of monitored area; the 3D PTZ under the light field camera adjusts the shooting angle of the light field camera when it rotates according to the set direction; and the computer respectively connects to the light field camera and the 3D PTZ, which generates refocused images corresponding to the original light field images, and determines the spatial coordinates of the powder leakage point and the hazard range of the powder leakage in the monitored area according to the refocused images and the shooting angle. Therefore, the range and accuracy of powder leakage monitoring are both increased by using this invention.

Abstract: The invention provides a method for evaluating deep-buried tunnel blasting parameters, and belongs to the technical field of mine engineering. The method comprises: setting multiple diverse blasting schemes; selecting a plurality of test sections with the same geological characteristics, the number of the test sections corresponding to the number of the blasting schemes; blasting the test sections using the blasting schemes, and obtaining diversified monitoring data of each test section; and comparing the diversified monitoring data to select the optimal blasting schemes for the test sections. According to the method for evaluating the deep-buried tunnel blasting parameters, by implementing different blasting schemes in test sections with the same geological characteristics, diversified monitoring data of the test sections are obtained and compared to select the optimal blasting schemes for the test sections, so as to ensure the safety and quality of blasting excavation of deep-buried tunnels.

Abstract: A pixel processing circuit, a reading method thereof and an image sensor are provided. The pixel processing circuit includes a pixel array comprising a plurality of pixel units arranged in a Bayer array, an Analog-to-Digital Converter (ADC) module comprising a plurality of analog-to-digital converters and a plurality of switch selection modules. The analog-to-digital converters are respectively located on the opposite first side and second side of the pixel array. The switch selection modules are set between the pixel array and the analog-to-digital converters to switch the connectivity between the pixel units and the analog-to-digital converters on the opposite sides of the pixel array so that signals of green pixel units are read by first analog-to-digital converters located at the first side of the pixel array, and signals of remaining color pixel units are read by second analog-to-digital converters that are located at the second side of the pixel array.

Abstract: The present application provides a preparation method for a core-shell structured tungsten/gadolinium oxide functional fiber for X and ? ray protection, comprising: first preparing a core-shell structured tungsten/gadolinium oxide powder; preparing a W@Gd2O3/PP blended melt from the powder; and preparing a W@Gd2O3/PP composite fiber from the blended melt. The core-shell structured tungsten/gadolinium oxide functional fiber prepared by the method can play a role in synergistic protection in the aspect of radiation protection, eliminate a weak protection area, and effectively absorb secondary radiation generated by radiation. Secondly, the prepared functional fiber has the characteristics of no lead and light weight, and has good application prospects in the aspect of X and ? ray radiation protection.

Abstract: A computing system receives a request to verify a user, the request comprising an indication of a jurisdiction in which the user will be verified. Based on the request, the computing system collects information related to the user. Based on the request, the computing system identifies a workflow corresponding to the jurisdiction. The workflow defines conditions for obtaining a verified status in the jurisdiction. The computing system executes the workflow to verify the user. The computing system hashes the verification record using a zero-knowledge proof protocol. The computing system generates a non-fungible token corresponding to the verification record. The non-fungible token is associated with a hashed version of the verification record. The computing system broadcasts the non-fungible token to a blockchain.

Abstract: A well cementing method is described for improving cementing quality by controlling the hydration heat of cement slurry. By controlling the degree and/or rate of hydration heat release from cement slurry, the method improves the hydration heat release during formation of cement with curing of cement slurry, improves the binding quality between the cement and the interfaces, and in turn improves the cementing quality at the open hole section and/or the overlap section. The cementing method improves cementing quality of oil and gas wells and reduces the risk of annular pressure.

Abstract: In response to receiving a request for an identity key from a first entity, an identity key for the first entity is generated. A first request from the first entity to replicate a set of data is received. The generated identity key for the first entity is added to the metadata of the set of data requested to be replicated. A determination is made whether a replication rule exists for the first entity. In response to determining that a replication rule exists for the first entity, the set of data is replicated according to the replication rule for the first entity.

Abstract: The present disclosure provides a vehicle positioning device for vehicle vision calibration, a positioning adjustment method, and a positioning adjustment system. The vehicle positioning device includes a base, a chassis, a translation mechanism and a rotation mechanism. A to-be-calibrated vehicle is placed onto the chassis, and the chassis is provided with a stopper. The translation mechanism is arranged between the chassis and the base, and configured to drive the chassis to move in an X-axis direction in a three-dimensional coordinate system relative to the base in accordance with a translation control instruction. The rotation mechanism is arranged between the chassis and the base, and configured to drive the chassis to rotate about a Z-axis in the three-dimensional coordinate system relative to the base in accordance with a rotation control instruction.

Abstract: A catalyst for continuous production of 1,1,1,3-tetrachloropropane through gas-solid reaction as well as a preparation method and use thereof are provided. The catalyst includes a zero-valent iron and phosphorus co-modified carbon material which includes a carbon material as a carrier, a zero-valent iron supported onto the carrier and serving as an active component, and a phosphate functional group formed on the surface of the carbon material. The preparation method includes: co-modifying a carbon material using a ferric salt and organic phosphorus to obtain the catalyst for continuous production of 1,1,1,3-tetrachloropropane through gas-solid reaction. The present application further provides a method for continuous production of 1,1,1,3-tetrachloropropane through gas-solid reaction.

Abstract: The present disclosure belongs to the technical field of genetic modification of an enzyme preparation and particularly relates to a preparation method of a high-stability superoxide dismutase with a transmembrane capability. The method includes the following steps: extracting mRNA from Geobacillus stearothermophilus, synthesizing cDNA by a reverse transcription method, amplifying a large number of coding regions of the cDNA by designing a specific primer, ligating the coding regions to an E. coli expression vector, and transforming the coding regions into engineering bacteria BL21 (DE3). A point mutation technology is used to enhance stability of the superoxide dismutase and a flexible polypeptide linker GGGSGGGS (SEQ ID NO: 11) is designed, such that a soluble fusion expression of a transmembrane peptide YGRKKRRQRRR (SEQ ID NO: 10) and the superoxide dismutase is successfully realized.

Abstract: A traffic charging method, a network device and a storage medium are disclosed. The method may include: establishing a session with a session management function network element, and receiving a usage amount reporting rule transmitted by the session management function network element, the usage amount reporting rule comprising a first reporting mode field and a reporting threshold, the first reporting mode field comprising delayed reporting; and in response to a rate switching event occurring when the user plane function network element forwards a packet, continuously forwarding the packet until the reporting threshold is reached, and transmitting usage amount information to the session management function network element, so that the session management function network element transmits a call ticket to a charging function network element according to the usage amount information.

Abstract: The present disclosure relates to improved placement, positioning, and/or orientation of radiators and baffles on a vehicle to improve and/or optimize air flow, radiator, and fuel cell performance.

Abstract: The invention discloses a powder leakage monitoring device and a powder leakage monitoring method. The powder leakage monitoring device comprises a light field camera, a 3D PTZ and a computer. Wherein, the light field camera records the original light field images of the monitored area; the 3D PTZ under the light field camera adjusts the shooting angle of the light field camera when it rotates according to the set direction; and the computer respectively connects to the light field camera and the 3D PTZ, which generates refocused images corresponding to the original light field images, and determines the spatial coordinates of the powder leakage point and the hazard range of the powder leakage in the monitored area according to the refocused images and the shooting angle. Therefore, the range and accuracy of powder leakage monitoring are both increased by using this invention.

Abstract: A battery pack is provided, including at least one layer of battery cells in a height direction thereof. Each layer of battery cells includes either or both of a plurality of rows and a plurality of columns of battery cells. The battery cells in each row are arranged end-to-end in a length direction of the battery pack. The rows are arranged in a width direction of the battery pack. At least a part of the battery cells in each row are staggered with corresponding battery cells in an immediately adjacent row of battery cells. The battery cells in each column are arranged end-to-end in the width direction of the battery pack. The columns are arranged in the length direction of the battery pack. At least a part of the battery cells in each column are staggered with corresponding battery cells in an immediately adjacent column of battery cells.