Abstract: The present invention discloses the low-stress niobium nitride (NbN) superconducting thin film and preparation method and application thereof. The preparation method includes the following steps: providing the metal Nb target and the Si-based substrates, fixing the Si-based substrate at room temperature, adjusting the mass flow ratio of N2/Ar to 20%-50%, the sputtering power to 50-400 W and the deposition pressure to 3.0-10.0 mTorr, NbN superconducting thin films with a stress range of-500 MPa˜500 MPa and a thickness of 70-150 nm were deposited on Si-based substrates. By synergistically controlling the mass flow rate ratio of N2/Ar, sputtering power, and deposition pressure, low stress NbN superconducting thin films can be easily and efficiently prepared. The stress range of the prepared NbN superconducting thin films meets the preparation requirements of superconducting dynamic inductance detectors, and can be mass-produced.

Abstract: Hierarchical network operation and resource control system and method for a mega satellite constellation, belonging to the field of spatial information technology, are provided. The hierarchical network operation and resource control system includes a service layer, a global organization layer, a local coordination layer and a resource layer. The service layer is used as an input to drive operation of whole system. The global organization layer is to realize “operation, measurement and control” integrated control and decision of whole network. The local coordination layer is to realize local management decision and management slice generation. The resource layer is to provide physical resource and physical device and realize resource virtualization.

Abstract: Methods, apparatus and systems for classifying user equipment measurements for positioning estimation are described. In one embodiment, a method performed by a first wireless communication node, includes: transmitting a measurement initiation request configured to be received by a wireless communication device; receiving a measurement initiation response, wherein the measurement initiation response comprises a plurality of measurements performed by the wireless communication device for estimating a position of the wireless communication device, wherein the plurality of measurements is classified into a plurality of groups; and performing a positioning integrity analysis by estimating an error distribution for at least one of the plurality of groups.

Abstract: The present invention relates to the technical field of mine fire prevention and extinguishing, in particular to a liquid nitrogen direct injection and low-temperature foaming intelligent filling system based on mine fire area characteristics and an application method, comprising a liquid nitrogen storage tank, a liquid nitrogen direct injection system and a low-temperature foaming system, wherein the liquid nitrogen storage tank communicates with a liquid nitrogen pressurizing device through a main pipeline; a temperature control unit is arranged on the main pipeline; and the liquid nitrogen pressurizing device is connected with the liquid nitrogen direct injection system and the low-temperature foaming system, respectively, liquid nitrogen is directly injected into a foam liquid, to prepare a low-temperature foam type fire preventing and extinguishing material by means of forced convection, membrane boiling, explosion boiling and nucleate boiling between the liquid nitrogen and water.

Abstract: This application provides a shift register, a gate drive circuit, a display panel, and an electronic device. The shift register includes a node control module, electrically connected to a first level signal receiving end, a second level signal receiving end, a first node, and a second node; an input module, electrically connected to a first clock signal end, a trigger signal input end, and the second node; an output module, electrically connected to the first level signal receiving end, the second level signal receiving end, the first node, a third node, and a drive signal output end; a first voltage stabilizing module, electrically connected to the first node, a fourth node, and the second level signal receiving end; and a second voltage stabilizing module, electrically connected to the second node, the third node, the fourth node, and a second clock signal end.

Abstract: In some examples, systems and methods for object tracking are provided. For example, a method includes: receiving an image frame in a sequence of image frames; identifying an object of interest in the image frame using a single-object tracker (SOT) based upon one or more templates associated with the object of interest in a template repository; generating a SOT output based on the identified object of interest; and detecting one or more objects in the image frame using a multiple-object tracker (MOT). In some examples, the MOT including a machine-learning model. In some examples, the method further includes conducting a matching between the SOT output and each detected object of the one or more detected objects to generate a match result; and generating a tracker output based at least in part on the SOT output, the one or more detected objects, and the match result.

Abstract: This application provides an antenna and a communication system. The antenna includes a front mounting surface, a side mounting surface, a front radiating element array, and a side radiating element array. The front radiating element array is mounted on the front mounting surface, and the side radiating element array is mounted on the side mounting surface. An included angle on a side away from the front radiating element array is a first included angle, and the first included angle is less than 180°. One end of a circuit module is connected to an antenna port connected to the front radiating element array and an antenna port connected to the side radiating element array, and another end of the circuit module is configured to connect to radio frequency ports.

Abstract: A data transmission method includes obtaining an allocation request of a client for a media access machine; in response to the allocation request, determining, from a plurality of media access service areas and according to first-level load information of each of the media access service areas, a target media access service area to which the client is to be connected; determining, from a plurality of media access machines corresponding to the target media access service area and according to second-level load information of the target media access service area, a target media access machine to which the client is to be connected; and allocating the target media access machine to the client for media data transmission between the client and the target media access machine.

Abstract: Provided are anti-MASP-2 antibodies or antigen-binding fragments thereof, isolated polynucleotides encoding the same, pharmaceutical compositions comprising the same, and the uses thereof.

Abstract: The present disclosure relates to a radio astronomy interference signal reduction method, apparatus, and system and a computer device. The method includes: acquiring at least two beam signals, and obtaining a covariance matrix between all the beam signals according to the beam signals, wherein the beam signals include subsignals from at least two directions; performing eigen-decomposition processing on the covariance matrix to obtain signal eigenvectors and eigenvalues corresponding to the subsignals, and extracting interference eigenvectors corresponding to interference signals from the signal eigenvectors based on the eigenvalues; and obtaining a target reduction result for the interference signals according to the signal eigenvectors and the interference eigenvectors. With the method, the problem of low accuracy of radio astronomy interference signal reduction in the related art can be solved.

Abstract: A mask topology optimization method for surface plasmon near-field photolithography, including: acquiring first mask data and performing fuzzy processing and projection processing on same to obtain second mask data; performing forward calculation according to the second mask data and a preset surface plasmon near-field photolithography condition to obtain imaging data and forward field data; calculating an imaging error between the imaging data and expected imaging data; performing adjoint calculation on the second mask data to obtain adjoint field data; calculating a gradient matrix of the imaging error relative to the first mask data according to the forward field data and the adjoint field data; and updating the first mask data according to the gradient matrix, repeating the steps for iteration calculation until the optimized mask data is obtained, and outputting a final mask pattern.

Abstract: A hot backup switching method and system based on network card detection. The method includes the following steps: S1: driving a first synchronous network card to send a query instruction to a second synchronous network card according to a preset time interval; S2: determining whether the first synchronous network card obtains a response packet sent by a master server device, if yes, executing S1; and if not and executing S3; S3: determining whether the working mode of the playback terminal belongs to a master mode; and if yes, and executing S4; and S4: determining whether the second synchronous network card responds, if yes, executing S1. Hot backup switching is implemented by means of the network cards of the master server device and the slave server device, and seamless switching and continued playback are realized.

Abstract: A battery, a battery module, and a battery pack are provided in the present application. The battery provided in the present application includes a housing and a negative electrode current collector disk. The negative electrode current collector disk is disposed inside the housing, and the negative electrode current collector disk is welded with the housing inside the housing before the housing is sealed.

Abstract: In some examples, systems and methods for user-assisted object detection are provided. For example, a method includes: receiving a first image frame of a sequence of image frames, performing object detection using an object tracker to identify an object of interest in the first image frame, based upon one or more templates associated with the object of interest in a template repository, outputting a first indicator associated with a first image portion corresponding to the identified object of interest, and receiving a user input associated with the object of interest. In some examples, the user input indicates an identified image portion in the image frame. In some examples, the method further includes generating a retargeted template, based at least in part on the identified image portion, and determining a second image portion associated with the object of interest in a second image frame of the sequence of image frames using the object tracker, based at least in part on the retargeted template.

Abstract: A current collecting plate provided in embodiments of the present application includes an electrode tab connector configured to electrically connected to a battery cell. A plurality of battery cell escaping slots are provided on an outer peripheral wall of the electrode tab connector, and the plurality of battery cell escaping slots are spaced from each other. An electrode tab protruding end is provided between adjacent two battery cell escaping slots, and an isolation space is defined between the electrode tab protruding end and the battery cell. The battery cell escaping slots spaced from each other are provided in the outer peripheral wall of the electrode tab connector.

Abstract: A method for signal transmission and apparatus thereof are provided. Particularly, an uplink signal transmission method is provided, comprising: reporting parameters of signal transmission quality in a specific modulation mode; acquiring configuration parameters of an uplink physical channel and/or a physical signal; and transmitting an uplink signal according to the configuration parameters of the uplink physical channel and/or the physical signal.

Abstract: In some examples, systems and methods for user-assisted object detection are provided. For example, a method includes: receiving an input image, and performing object detection by a software detector to identify a set of detected objects. The software detector includes a machine-learning model. The method further includes outputting one or more indicators of the set of detected objects. Each detected object in the set of detected objects is associated with a confidence level. The method further includes receiving a user input; identifying a template including an image portion associated with the user input; determining a similarity metric between the template and an object in the set of detected objects; modifying a confidence level of the object based at least in part on the determined similarity metric; and generating an output including an indicator of the object based at least in part on the modified confidence level.

Abstract: The present disclosure provides engineered Saccharomyces cerevisiae strains for production of vanillylamine and capsaicin, and a construction method and use thereof, and belongs to the technical field of bioengineering. In the present disclosure, a synthesis pathway of vanillylamine is expressed heterologously in Saccharomyces cerevisiae for the first time, and biosynthesis of the vanillylamine is realized for the first time. After the optimization of precursors supply and the optimization of S-adenosyl-L-methionine (SAM) cycle, a yield of the vanillylamine reaches 16.48 g/L, and a synthesis efficiency of the vanillylamine is increased by nearly 155%. This is the highest optimization efficiency obtained by optimizing the SAM cofactor strategy so far.

Abstract: The present disclosure provides herein anti-gremlin1 antibodies or antigen-binding fragments thereof, isolated polynucleotides encoding the same, pharmaceutical compositions comprising the same, and the uses thereof.

Abstract: The present application relates to the field of biomedical technology, and specifically, provides an anti-PD-1 humanized antibody or an antigen-binding fragment thereof and an application thereof. The antibody can efficiently and specifically bind to PD-1, and can effectively block the binding of the PD-1 to PD-L1 and PD-L2. Therefore, the antibody or antigen-binding fragment thereof, and its related nucleic acid, vector, cell or pharmaceutical composition can be used to prepare a medicament for the treatment of PD-1-mediated diseases or conditions.