Abstract: Described are scaffolds for tissue engineering and method of making and using the scaffold. The method of making can include providing a textile layer formed of a plurality of yarns, wherein the plurality of yarns are formed of interlocking bundles of fibers formed from a first polymer or a first polymer mixture; and forming one or more substrate layer of a second polymer or a second polymer mixture onto the textile layer having a pre-defined thickness.

Abstract: Disclosed herein are impedance-based biosensor systems comprising an impedance-based biosensor having an electrode, a meter in electrical communication with the electrode, a processor in electrical communication with the impedance-based biosensor and the meter, and a memory storing instructions to be executed by the processor. The instructions can cause the impedance-based biosensor system to measure the impedance of the electrode, derive one or more electrical properties of the impedance-based biosensor from the impedance of the electrode, and calculate a viable cell count based on the one or more electrical properties.

Abstract: The present invention provides a microchannel matrix optical waveguide plate, which is formed by stacking two optical element groups perpendicularly. Each of the optical element groups is composed of a plurality of parallel-arranged optical elements. Each of the optical elements includes a glass substrate. The glass substrate is divided into an air surface and a reflecting surface. A first metal film layer, a magnetic material film layer and a second metal film layer are sequentially arranged on the air surface. The present invention uses magnetic material attraction to replace an adhesive to achieve tight fitting of optical elements, thus reducing the influence of the adhesive on reflected light of optical elements. The fabricated microchannel matrix optical waveguide plate has the characteristics of high imaging definition and simple fabrication process.

Abstract: A method for extracting video frame features includes: obtaining a number of initial features of each video frame in a video sequence; calculating global channel attention information of the video sequence based on the initial features of each video frame in the video sequence; calculating local channel attention information of a target video frame according to initial features of a target video frame; wherein the target video frame is one of the video frames in the video sequence; and performing channel attention mechanism processing on the initial features of the target video frame according to the global channel attention information and the local channel attention information to obtain optimized features of the target video frame.

Abstract: A method for extracting video features may include: obtaining a target video sequence that comprises a number of video frames; performing video frame feature extraction on the target video sequence to obtain video frame features of each of the video frames; performing feature weight calculation on each of the video frame features to obtain the feature weight of each of the video frame features; wherein the feature weight of each of the video frame features is determined by the video frame features of all of the video frames in the target video sequence; and performing feature weighting on each of the video frame features according to the feature weight of each of the video frame features to obtain video features of the target video sequence.

Abstract: An airbag assembly includes: an air bag, mounted to a vehicle seat and capable of inflating from an undeployed state to a deployed state, wherein in the deployed state, the air bag extends along the head and torso of an occupant in the vehicle seat, arranged to surround the head and torso of the occupant; and a strap, for mounting the air bag to the vehicle seat and having a first section and a second section, wherein in the deployed state, the strap is tightened, the first section being mounted to the air bag on an outer surface of the air bag in an extension direction of the air bag, and the second section extending on at least one outer side surface of the air bag in a direction at an angle with respect to the extension direction of the air bag.

Abstract: A method for pedestrian body part feature extraction is provided, including: performing global feature extraction on a target pedestrian image to obtain a global feature map; learning each of body parts in the global feature map using a self-produced supervision signals-based self-regulated channel attention model to output first channel attention vectors each describing a respective one of the body parts; weighting the first channel attention vectors with the global feature map to obtain a weighted feature map describing the body parts; and extracting body part features of the target pedestrian image from the weighted feature map.

Abstract: A target identification method includes: obtaining an image containing a target to be identified; performing feature extraction on the image to obtain image features in the image; and inputting the image features into a target identification network model to obtain an identification result that determines a class to which the target to be identified belongs. The target identification network model includes a loss function that is based on intra-class constraints and inter-class constraints. The intra-class constraints are to constrain an intra-class distance between sample image features of a sample target and a class center of a class to which the sample target belongs, and the inter-class constraints are to constrain inter-class distances between class centers of different classes, and/or inter-class angles between the class centers of different classes.

Abstract: A target identification method includes: obtaining an image containing a target to be identified; performing feature extraction on the image to obtain image features in the image; and inputting the image features into a target identification network model to obtain an identification result that determines a class to which the target to be identified belongs. The target recognition network model includes a loss function that is to constrain a first distance corresponding to each triplet in a number of triplets and a second distance corresponding to each triplet in the triplets. The first distance represents a distance between anchor image features and positive sample image features in each triplet in the triplets, and the second distance represents a distance between the anchor image features and a class center mean of a number of classes in each triplet in the triplets.

Abstract: The present application provides a display panel and a display device, the display panel includes a light-emitting layer and a light-concentrating layer positioned on the light-emitting layer, the light-emitting layer includes a plurality of light-emitting units, the light-concentrating layer includes a first member and a second member for converging light, wherein the first member includes a plurality of openings, an edge of the openings includes a first inclined surface for reflecting light and a second inclined surface positioned on the first inclined surface, and the first inclined surface and the second inclined surface are connected by a first connecting portion.

Abstract: A method for obtaining a feature extraction model, a method for human fall detection and a terminal device are provided. The method for human fall detection includes: inputting a human body image into a feature extraction model for feature extraction to obtain a target image feature; in response to a distance between the target image feature and a pre-stored mean value of standing category image features being greater than or equal to a preset distance threshold, determining that the human body image is a human falling image; and in response to the distance being less than the preset distance threshold, determining that the human body image is a human standing image. The feature extraction model is obtained based on constraint training to aggregate standing category image features and separate falling category image features from the standing category image features.

Abstract: The present application provides a display panel and a display device. The display panel includes an array substrate, a pixel definition layer, an organic light-emitting layer, a cathode layer, an encapsulation layer, and an absorption layer. The absorption layer is arranged on one side of the pixel definition layer away from the array substrate. The absorption layer is arranged corresponding to at least a portion of the pixel definition layer in a curved display region for selectively absorbing at least one color light, so as to reduce a risk of color shift in a white screen at large viewing angles without causing color shift of images at a vertical viewing angle.

Abstract: A time transfer method based on undifferenced and uncombined PPP-RTK is applied to a time transfer system including a PPP-RTK network end observation station network and PPP-RTK user end observation stations. The network end observation station network includes GNSS reference stations and a network data processing center. The user end observation stations include a time reference station and an ordinary user station. The method includes: acquiring GNSS observations collected by the GNSS reference stations and performing an undifferenced and uncombined PPP-RTK resolution to generate network end products; each of the user end observation stations performing an undifferenced and uncombined PPP-RTK resolution by using collected GNSS observations and the network end product to generate multi-GNSS receiver clock biases; and solving a combined inter-station clock bias by using the receiver clock biases of the ordinary user end observation stations and those of the time reference station serving also as user end.

Abstract: An organic light emitting diode display device includes a substrate, a light emitting region disposed on the substrate, a packaging layer covering the light emitting region, and a protective component. The substrate includes a folded region in a first direction and a non-folded region in a second direction, and the first direction is perpendicular to the second direction. The protective component is disposed in the folded region in the first direction and the unfolded region in the second direction. The protective component reduces cracking at a packaging layer and improves bending durability of the organic light emitting diode display device.

Abstract: A display panel has a display region and a non-display region, and the non-display region includes a second bendable region. The display panel includes a substrate, a first inorganic layer, an organic protection layer, a light-emitting function layer, an encapsulation layer, and a second inorganic layer. The second inorganic layer is disposed on a side of the encapsulation layer away from the substrate and extends from the display region to the non-display region and beyond a boundary of the encapsulation layer. A plurality of openings are provided in an edge part of the second inorganic layer away from the display region.

Abstract: An LEO-augmentation-based convergence time shortening method of wide-area UDUC PPP-RTK positioning is provided, which includes: establishing UDUC PPP-RTK network end observation equations of GNSSs, and integrating navigation signals of an LEO satellite navigation system into the UDUC PPP-RTK network end observation equations, to obtain LEO-integrated GNSS UDUC PPP-RTK network end observation equations; solving network end parameters of the LEO-integrated GNSS UDUC PPP-RTK network end observation equations; correcting user end GNSS UDUC observation equations and user end LEO UDUC observation equations according to the network end parameters; solving corrected user end GNSS UDUC observation equations and corrected user end LEO UDUC observation equations, to obtain a user end positioning vector in an ambiguity-float mode; and a user end float ambiguity vector and its variance-covariance matrix; and using the user end float ambiguity vector and the variance-covariance matrix to perform the PAR; and obtain PPP-RTK

Abstract: Improved biolistic bombardment is observable when using a modification to a double-barrel device. One such modification is a custom attachment that can be retrofit to a standard helium-based gene gun. The custom attachment facilitates DNA and protein delivery. The attachment confines the flow of particles in a barrel similar to the choke on a shotgun barrel.

Abstract: A compressed memory system of a processor-based system includes a memory partitioning circuit for partitioning a memory region into data regions with different priority levels. The system also includes a cache line selection circuit for selecting a first cache line from a high priority data region and a second cache line from a low priority data region. The system also includes a compression circuit for compressing the cache lines to obtain a first and a second compressed cache line. The system also includes a cache line packing circuit for packing the compressed cache lines such that the first compressed cache line is written to a first predetermined portion and the second cache line or a portion of the second compressed cache line is written to a second predetermined portion of the candidate compressed cache line. The first predetermined portion is larger than the second predetermined portion.

Abstract: The present application provides a heat pump system. The heat pump system comprises a main circulating refrigerant loop, an auxiliary circulating refrigerant loop, and a refrigerant management system; the main circulating refrigerant loop comprises a main compressor, a first main heat exchanger, a main throttling device, and a second main heat exchanger, the main compressor is configured to allow a refrigerant in the main circulating refrigerant loop to circulate in a main circulating refrigeration working condition flow direction or circulate in a main circulating heating working condition flow direction. The auxiliary circulating refrigerant loop comprises an auxiliary compressor, a first auxiliary heat exchanger, an auxiliary throttling device, and a second auxiliary heat exchanger; the auxiliary compressor is configured to allow a refrigerant in the auxiliary circulating refrigerant loop to circulate in an auxiliary circulating heating working condition flow direction.

Abstract: A person re-identification method, a storage medium, and a terminal device are provided. In the method, a loss function used during model training is a preset distribution-based triplet loss function constraining a difference between a mean of a negative sample feature distance and a mean of a positive sample feature distance to be larger than a preset difference threshold; where the positive sample feature distance is a distance between a feature of a reference image, and a feature of a positive sample image, and the negative sample feature distance is a distance between the feature of the reference image and a feature of a negative sample image. In this manner, it can constrain the mean of the positive sample feature distance and that of the negative sample feature distance, thereby improving the accuracy of person re-identification results.