Abstract: A genome-specific gene sequence fragment of female Acipenser Dabryanus and a method for identifying the sex of Acipenser Dabryanus are disclosed. The gene sequence fragment of Acipenser Dabryanus is used to identify the sex of Acipenser Dabryanus. The method includes: performing PCR amplification on the DNA of the Acipenser Dabryanus to be tested, and judging that the Acipenser Dabryanus to be tested is female when a resultant product from the amplification shows 3 bands on an agarose gel and the Acipenser Dabryanus to be tested is male when a resultant product from the amplification shows 2 bands on an agarose gel, alternatively, judging that the Acipenser Dabryanus to be tested is female when a resultant fragment from the amplification has a 1402 bp band and it is male if there is no 1402 bp band. The gene sequence fragment is used to quickly and efficiently identify the sex of Acipenser Dabryanus.

Abstract: This disclosure provides a data processing method. The method includes: A backup server receives a metadata obtaining command, where the metadata obtaining command is used to obtain file system metadata in a first format, and the command includes an identifier of a to-be-read target directory. The backup server obtains, from a metadata storage area of an archive storage based on the identifier of the target directory, file system metadata that is in a second format and that corresponds to the target directory, converts the file system metadata that is in the second format and that corresponds to the target directory into file system metadata that is in the first format and that corresponds to the target directory, and returns the file system metadata.

Abstract: Embodiments of the present disclosure discloses a method of information displaying, apparatus and an electronic device. The method comprises: displaying at least two session screening identifications in a first display area of a first message page, the at least two session screening identifications comprising: a first screening identification for indicating that a new message in a session is notified with a first notification strategy, and a second screening identification for indicating that a new message in the session is notified with a second notification strategy; and displaying information of each session corresponding to a currently selected session screening identification in a second display area of a second message page. The method may only display sessions that match user requests, reducing operations of users searching for required sessions in all sessions lists and saving time for users to browse required sessions.

Abstract: 2-hydroxy-5-[2-(4-(trifluoromethylphenyl)ethylamino)]benzoic acid crystal forms and a preparation method therefor are proposed. Crystal form I is a monoclinic crystal system, which has a Pc space group and can be obtained by slow cooling, evaporating the solvent at a constant temperature, evaporating the solvent at an increased temperature, or adding an anti-solvent. Crystal form II is a triclinic crystal system, which has a P1 space group and can be obtained by rapid cooling or freeze-drying. According to the method, the process is simple, costs are low, and the yield exceeds 90%; and the crystal forms of the crystal forms I and II have high purity, the crystal shapes thereof are intact, and have excellent fluidity, facilitating preparation, particularly the preparation of a pharmaceutical preparation for preventing and/or treating degenerative diseases of the central nervous system. Furthermore, the two crystal forms have a better apparent solubility than that of raw materials.

Abstract: Provided in the present application are a data processing method and apparatus based on data coding, and a device. The method comprises: performing N-channel error correction coding on data to be processed that is in information to be processed, so as to obtain N pieces of coded data to be processed; by using coded meta-channel data obtained by means of error correction coding, performing redundancy processing on the coded data to be processed, so as to obtain N pieces of response data; and then performing error correction decoding on the N pieces of response data, so as to obtain processing result information of the information to be processed.

Abstract: Provided is a method for determining a degree of quantum entanglement, a computing device and a storage medium. The method includes: determining a target parameter value of a target adjustable parameter in a sub-circuit of a target quantum circuit, obtaining state information of the auxiliary register in the target quantum circuit, in a case of the target adjustable parameter has the target parameter value, a first input state of the auxiliary register is a preset initial state, and a second input state of the main register includes at least the first quantum state; estimating the k-order trace of the first quantum state under the first error condition based on the state information of the auxiliary register; and determining a degree of entanglement corresponding to the first quantum state based on at least the k-order trace of the first quantum state.

Abstract: A method for receiving a backoff value at a wireless station is presented. A traffic indication map is received at the station, wherein a backoff number is implicitly assigned to the station based on a position of the station within the traffic indication map. The backoff value is determined by multiplying the backoff number by a predetermined time value.

Abstract: The technology described herein is directed to systems, methods, and software for indexing video. In an implementation, a method comprises identifying one or more regions of interest around target content in a frame of the video. Further, the method includes identifying, in a portion of the frame outside a region of interest, potentially empty regions adjacent to the region of interest. The method continues with identifying at least one empty region of the potentially empty regions that satisfies one or more criteria and classifying at least the one empty region as a negative sample of the target content. In some implementations, the negative sample of the target content in a set of negative samples of the target content, with which to train a machine learning model employed to identify instances of the target content.

Abstract: A beam adjustment assembly includes a phase shifter and a connecting plate. The phase shifter includes a circuit board and main dielectric slabs configured to shift a phase. The circuit board is provided with a first strip and a second strip that are spaced. The first strip and the second strip are configured to respectively connect to radiating elements of an antenna. The connecting plate is slidably assembled on the circuit board and is configured to control an electrical connection between the first strip and the second strip. When sliding, the main dielectric slab can push the connecting plate to slide to control a quantity of radiating elements in the antenna system. The sliding of the main dielectric slab in the phase shifter is used as a driving mechanism of the connecting plate.

Abstract: The present application discloses a sound-output device, including a vibration speaker configured to generate a bone-conducted sound wave; and an air-conducted speaker configured to generate an air-conducted sound wave. The sound-output device further comprises a signal processing module configured to generate a control signal, wherein, the vibration speaker includes a vibration assembly electrically connected to the signal processing module to receive the control signal, and generate the bone-conducted sound wave based on the control signal, and the air-conducted speaker includes a housing coupled to the vibration assembly to generate the air-conducted sound wave based on the bone-conducted sound wave.

Abstract: The present disclosure discloses an acoustic output device. The acoustic output device may include a first acoustic driver including a first diaphragm; a second acoustic driver including a second diaphragm; a control circuit electrically connected with the first acoustic driver and the second acoustic driver respectively, the control circuit provides a first electrical signal for driving a vibration of the first diaphragm, and a second electrical signal for driving a vibration of the second diaphragm, and a phase of the first electrical signal and a phase of the second electrical signal are opposite; and a housing supporting the first acoustic driver and the second acoustic driver, wherein a sound generated by the vibration of the first diaphragm is radiated outward through a first sound guide hole on the housing, and a sound generated by the vibration of the second diaphragm is radiated outward through a second sound guide hole on the housing.

Abstract: Disclosed a method for predicting permeability of a multi-mineral phase digital core based on deep learning. In the present disclosure, a three-dimensional digital core is constructed and a pore structure is randomly generated; after a plurality of multi-mineral digital core images is acquired by performing image segmentation on the three-dimensional digital core, permeability corresponding to each of the multi-mineral digital core images is acquired by simulation using multi-physics field simulation software and a multi-mineral digital core data set is constructed based on the plurality of multi-mineral digital core images and the permeability corresponding to each of the multi-mineral digital core images; an SE-ResNet18 convolutional neural network is constructed and trained with the multi-mineral digital core data set; and an image of a multi-mineral core to be predicted is input into the trained SE-ResNet18 convolutional neural network to determine the permeability of the multi-mineral core.