Abstract: Methods and systems are provided for inverted detection and positioning of a strip-like subterranean tunnel in a mountain mass, pertaining to the field combining theories of the discipline of geophysics and remote sensing technology.

Abstract: Provided is a quad-core radio-frequency coil circuit. The quad-core radio-frequency coil circuit includes a coil module (1) and a front-end module (2). The coil module (1) is configured to receive a nuclear magnetic test signal and, according to the nuclear magnetic test signal, generate an induction signal. The front-end module (2) is connected to the coil module (1) and configured to generate the nuclear magnetic test signal and collect the induction signal.

Abstract: Embodiments of this application disclose an encoding and decoding method including: Each of multiple viewpoint bitstreams includes a first type bitstream and a second type bitstream; when a first image frame in a first type bitstream of a first viewpoint bitstream is played, receiving a switching request that indicates to play a second viewpoint bitstream; determining a first random access frame that is in a first type bitstream and/or a second type bitstream of the second viewpoint bitstream and whose play moment is after and closest to the first image frame; decoding to obtain the first random access frame based on encoded data of the first random access frame in the second viewpoint bitstream, and decoding to obtain and play an image frame that is in the first type bitstream of the second viewpoint bitstream by using the first random access frame as a reference frame.

Abstract: A handle structure includes a first handle body, a second handle body, and a transparent plate. The first handle body includes a first handle portion and a first connecting portion. The second handle body includes a second handle portion and a second connecting portion. The first handle body and the second handle body are hollow. The first connecting portion is detachably connected with the second connecting portion when the first handle body and the second handle body are in an installed position. The transparent plate is within and sealingly connected with the first connecting portion and the second connecting portion when the first handle body and the second handle body are in the installed position.

Abstract: The invention provides a device and a method for reinforcing weathered stone relics by using low temperature plasma to activate calcium hydroxide in a carbon dioxide atmosphere. Based on the low temperature plasma physics and the principles of the relics conservation, the invention applies the technology of low temperature plasma to relics conservation, and especially to the reinforcement of weathered stone relics by activating calcium hydroxide. According to the application, using low temperature plasma source loaded with carbon dioxide to active calcium hydroxide can realize the carbonation and precipitation of calcium hydroxide within 1 min-2 min, and reinforce the weathered stone relics. The application has the advantages of safety, high efficiency, non-damage, and no side effects.

Abstract: The present invention relates to a method for producing an abrasion-resistant coating on surface of a 3D printed titanium alloy component, which belongs to the field of surface modification. The method comprises using spherical TC4 titanium alloy powder as a base material and adopting selective laser melting (SLM) technology to manufacture a 3D printed titanium alloy component in a layer-by-layer stacking manner, using graphene oxide to perform friction-induction treatment, and making the graphene oxide infiltrate into the surface of the TC4 titanium alloy component to obtain a graphene oxide surface coating. The goal of improving the friction and wear performance of the TC4 titanium alloy printed components is achieved. The preparation method is simple, and the steps are easy to operate. Introducing the graphene oxide is beneficial to reduce the generation of wear debris during the friction and wear processes and improve tribological characteristics of the base material.

Abstract: A vehicle recognition method includes: acquiring a training set including multiple vehicle images which includes vehicles at a designated crossroad and corresponding vehicle information; performing learning and sampling by a neural network to obtain a subnetwork model and determining same as a current model, and training the current model by using the training set to obtain reward parameters; calculating a constraint condition value of the current model, calculating a reward value on the basis of the constraint condition value and the reward parameters, updating trainable parameters of the neural network by using the reward value, and returning to execute the operation of obtaining the subnetwork model until a preset condition is reached; after the preset condition is reached, selecting an optimal network model; and inputting a vehicle picture to be recognized into the optimal network model, to obtain vehicle information of the vehicle picture to be recognized.

Abstract: A low-illuminance video processing method, a low-illuminance video processing device and a storage medium are disclosed. The method includes: acquiring a same number of preceding frame images and subsequent frame images corresponding to a current video frame of a low-illuminance video to obtain a frame image set corresponding to the current video frame, and performing traversal on the low-illuminance video to obtain frame image sets corresponding to all video frames; after performing image alignment on all frame images in the frame image sets corresponding to all video frames, inputting the frame image sets into a pre-trained low-illuminance image enhancement model to obtain enhanced frame images; and generating an enhanced video based on the enhanced frame images.

Abstract: The present disclosure is related to a derivative of berberine, and the preparation method and applications thereof. The present derivative of berberine has a significant anti-myocardial ischemic effect, and its preparation route is feasible and reasonable with lower cost, less toxic and harmful reagents used, no environmental contamination, and is suitable for large-scale production. The cardioprotective derivative of berberine developed in the present disclosure and the preparation method thereof effectively provide a basis for developing novel cardioprotective medicaments, have a great economic benefit in the future, and bring a broad social benefit, leading to promising application prospects.

Abstract: A method, device, terminal, and storage medium for reusing parameters of a deep learning model are disclosed, the method including: training a target model with a preset training set; obtaining a pre-trained original model; obtaining correspondences between layers of the target model and the original model having identical network structures, and parameter correspondences between corresponding layers; extracting multiple original model parameters from layers of the original model each having an identical network structure with respective layer of the target model; based on the parameter correspondences, replacing the corresponding parameters of the target model one by one with the original model parameters, validating the replaced target model with the preset validation set, and when the validation is passed, recording that the corresponding original model parameter is reusable; and using all reusable original model parameters to replace the corresponding parameters in the target model to obtain and train a n

Abstract: A composite current collector includes a support layer and a conductive layer. The support layer has two surfaces opposite to each other along a thickness direction. The conductive layer is provided on the two surfaces and includes a first portion and a second portion. The first portion includes a first sub-portion and a second sub-portion provided on the two surfaces, respectively. The second portion includes a third sub-portion and a fourth sub-portion. The third sub-portion and the first sub-portion are integrally provided. The fourth sub-portion and the second sub-portion are integrally provided. The third sub-portion and the fourth sub-portion both project from the support layer. The third sub-portion and the fourth sub-portion are affixed to each other and fused as a whole.

Abstract: In various examples, sensor data representative of an image of a field of view of a vehicle sensor may be received and the sensor data may be applied to a machine learning model. The machine learning model may compute a segmentation mask representative of portions of the image corresponding to lane markings of the driving surface of the vehicle. Analysis of the segmentation mask may be performed to determine lane marking types, and lane boundaries may be generated by performing curve fitting on the lane markings corresponding to each of the lane marking types. The data representative of the lane boundaries may then be sent to a component of the vehicle for use in navigating the vehicle through the driving surface.

Abstract: Disclosed are a method and apparatus for training an image restoration model, an electronic device, and a computer-readable storage medium. The method for training an image restoration model includes: pre-processing training images to obtain a low-illumination image sample set (110); determining, based on low-illumination image samples in the low-illumination image sample set and the image restoration model, a weight coefficient of the image restoration model (120), wherein the image restoration model is a neural network model determined on a U-Net network and a deep residual network; and adjusting the image restoration model according to the weight coefficient, and further training the adjusted image restoration model using the low-illumination image samples until the image restoration model restores parameters of all the low-illumination image samples in the low-illumination image sample set into a preset range (130).

Abstract: Flexible, insertable, transparent microelectrode arrays that allow integration of electrophysiological recordings with any optical imaging or stimulation technology are disclosed. In some embodiments of the disclosed technology, a microelectrode array includes a flexible substrate layer including a shank member extending in a first direction and a tapered tip at an end of the shank member, and a plurality of electrode wires arranged in the first direction on the flexible substrate layer, wherein the plurality of electrode wires includes adjacent electrode wires having different lengths from each other such that an electrode wire arranged closer to a centerline of the flexible substrate layer is longer than an adjacent electrode arranged further away from the centerline of the flexible substrate.

Abstract: A method for detecting the state of the proximity sensor, applied to a terminal including the proximity sensor and an antenna, includes: sending a predetermined instruction to the proximity sensor; determining whether the proximity sensor is abnormal based on a feedback result of the proximity sensor to the predetermined instruction; and maintaining the antenna transmitting power at a low power if the proximity sensor is abnormal. Through the feedback of the proximity sensor to the request to obtain the capacitance value, it is determined whether the proximity sensor can work normally, and in a case that the proximity sensor cannot work normally, the antenna transmitting power is reduced to avoid the continuous high antenna transmitting power due to the inability of the proximity sensor to work normally, which reduces the radiation to the human body.

Abstract: Provided are a parallel magnetic resonance imaging method and apparatus based on adaptive joint sparse codes and a computer-readable medium. The method includes solving an l2?lF?l2,1 minimization objective, where the l2 norm is a data fitting term, the lF norm is a sparse representation error, and the l2,1 mixed norm is the joint sparsity constraining across multiple channels; separately updating each of a sparse matrix, a dictionary and K-space data with a corresponding algorithm, and obtaining a reconstructed image by a sum of root mean squares of all the channels. The joint sparsity of the channels is developed using the norm l2,1. In this manner, calibration is not required while information sparsity is developed. Moreover, the method is robust.

Abstract: The present invention discloses a method for establishing a colorectal cancer p73 reporter gene cell line, specifically including: first designing a site-specific sgRNA sequence of a p73 gene and cloning same into a plasmid PX459; integrating a homologous recombination sequence of the p73 gene and a green fluorescent protein DNA fragment (EGFP), and transforming the plasmid and the integrated fragment together into a colorectal cancer cell line HCT116 by electroporation; performing signal cell screening through a flow cytometer to obtain EGFP-expressing cells, and amplifying a monoclonal cell line; and identifying a positive p73 reporter gene cell line through PCR identification and Western blot, among screened EGFP-expressing cell lines. The colorectal cancer cell line p73 gene and the EGFP are co-expressed, and the expression level of the EGFP is highly consistent with that of the p73 gene.

Abstract: Methods and devices for computationally constructing brain potentials across whole brain using electrocorticography signals recorded from a small region on the brain surface are disclosed. In some embodiments of the disclosed technology, a method includes obtaining a plurality of locally recorded surface potentials from a plurality of first cortical areas of a brain surface; and performing a virtual reconstruction of an average brain activity for individual cortical areas and a pixel-level cortex-wide brain activity for a plurality of cortical areas of the brain surface including the plurality of first cortical areas based on the plurality of locally recorded surface potentials.

Abstract: A composite membrane, including a base plate; the base plate is used for corresponding to a light source, and an emergent surface of the base plate is provided thereon with multiple dispersive prism areas and multiple diffusion plates, wherein the dispersive prism areas correspond to lamp bead shadow areas, and the diffusion plates correspond to non-lamp bead shadow areas; the dispersive prism areas are provided in areas in which light energy is distributed unevenly, while only the diffusion plates are laid in areas in which light energy is distributed evenly, and the dispersive prisms need not be laid, thereby reducing production costs while improving the phenomenon of a visual effect being uneven. Further provided is a design method for a composite membrane.

Abstract: A shimming method and device, an electronic device, and a storage medium are disclosed. The shimming method includes: obtaining object static magnetic field distribution information corresponding to a target object, the object static magnetic field distribution information including the static magnetic field distribution information of the target object under the action of a main magnet of a magnetic resonance system; determining a target static magnetic field based on the object static magnetic field distribution information and a preset shim coil magnetic field distribution model; and adjusting at least one shim coil parameter in the shim coil magnetic field distribution model until a magnetic field uniformity of the target static magnetic field satisfies a preset condition, and accordingly obtaining at least one target shim coil parameter.