Abstract: Provided in the embodiments of the present disclosure are a video processing method and device. The video processing method includes: determining a target image to be processed in a video; performing semantic segmentation on the target image through a convolutional neural network to obtain a first feature map, wherein the first feature map comprises a feature map corresponding to at least one semantic class; determining a target image region corresponding to the at least one semantic class in the target image according to the first feature map; wherein the at least one semantic class comprises an object-in-hand, and a training image adopted by the convolutional neural network in a training process is marked with an image region corresponding to the at least one semantic class.

Abstract: A power tool apparatus includes a housing, a control board, a working part, a motor and a fan. The housing has a battery pack cavity. The battery pack cavity is configured to install a battery pack. The control board is disposed within the housing. The working part is disposed on the housing. The motor is disposed within the housing. The motor drives the working part to operate. The air duct is disposed within the housing. The air duct is configured for heat dissipation of the power tool apparatus. The fan is fixedly connected to an output shaft of the motor. The fan is configured to drive air to flow along the air duct when rotating. The housing has at least two air inlets and at least one first air outlet. The air duct is disposed between the air inlets and the first air outlet.

Abstract: Provided are a transition type determination method, an electronic device and a storage medium. The method includes: acquiring a picture matching degree between a candidate transition type and a transition position of two adjacent video clips, and acquiring a music matching degree of the candidate transition type and background music of a video to which the two adjacent video clips belong; and determining a target transition type for the transition position according to the picture matching degree and the music matching degree, where the target transition type is used for a transition effect between the two adjacent video clips.

Abstract: Corneal stromal scars are the leading cause of corneal blindness. The present invention relates to methods and compositions useful in therapies for this pathological condition. The invention provides corneal stromal stem cells and certain other stem cells and as well as exosome polynucleotides produced by such cells, and methods for making and using these cells and compositions. The invention is based upon the discovery that exosomes and their associate active components obtained from these cells comprise agents having the same capacity as corneal stromal stem cells to reduce scarring and prevent scar formation in patients having corneal damage.

Abstract: A point cloud encoding method, including: obtaining attribute information about the attributes of a current point in a point cloud; processing the attribute information of the current point to obtain a residual value of the attribute information of the current point; using a target quantization manner, quantizing the residual value of the attribute information of the current point to obtain a quantized residual value of the attribute information of the current point; the target quantization manner comprises at least two of the following quantization manners: a first quantization manner, a second quantization manner, and a third quantization manner.

Abstract: The present disclosure belongs to the technical field of space satellite propulsion, and particularly relates to a digital filter based method for measuring thrust response time of a satellite-borne micro-thruster.

Abstract: A communication method and a communication apparatus, wherein the method includes: A first device determines path parameter group search range information and first information, where the first information indicates K path parameter groups, and K is an integer greater than 0; and the first device sends the path parameter group search range information and the first information to a second device, where the path parameter group search range information is used to correct the K path parameter groups, and K corrected path parameter groups are used for channel estimation.

Abstract: The embodiments of the present disclosure provide a video generation method, an apparatus, a device, and a storage medium, the video generation method including: obtaining a plurality of images and music matched to the plurality of images; determining first feature information for the plurality of images and second feature information for the music; according to the first feature information, the second feature information and a plurality of pre-stored rendering effects, determining a target rendering effect combination; the rendering effects being animation, special effects or a transition; and generating a video according to the plurality of images, the music and the target rendering effect combination.

Abstract: The present disclosure provides methods and systems for systematic elimination of background DNA in a DNA mixture sample. Often, the DNA of interest is in a heavy background of DNAs from other tissues. For example, a majority of DNA in plasma cell-free DNA originates from white blood cells. The present disclosure exploits genome-wide background DNA methylation to systematically eliminate DNA from white blood cells and normal tissue(s), therefore enriching non-background DNA for diagnostics, for example, the diagnostics of cancer and infectious diseases. The methods and systems may comprise the selection of targeted regions to generate one or more hybrid capture panels, digest nucleic acid molecules of specific methylation status with one or more restriction enzymes, retrieve the remaining DNA using the hybrid capture panel, sequence the captured DNA, analyze the sequencing data of the captured DNA, and diagnose diseases.

Abstract: A data transmission method and apparatus, and relates to the communication field. In the method, after obtaining a path parameter of each of at least one communication path between a first device and a second device, the first device may demodulate first data based on a pilot and the path parameter of each communication path. In other words, when demodulating the first data, the first device may refer to not only the pilot but also the path parameter of each communication path. The path parameter of each communication path can assist in demodulating the first data. When the path parameter of each communication path assists in demodulating the first data, there may be no need for too many pilots. Therefore, a resource occupied by the pilot can be reduced.

Abstract: Provided herein are GLP-1 receptor modulator compounds, pharmaceutical compositions, methods of their preparation, and methods of their use in treatment, and/or diagnosis.

Abstract: A roller embossing method for flexible graphite polar plates of fuel cells comprises: (1) adjusting a clearance of an embossing roller pair of a roller press to a target thickness value of a monopolar plate; (2) feeding a flexible graphite slab in front of the embossing roller pair, and entangling the flexible graphite slab by means of opposite rotation of the embossing roller pair; (3) after the slab is entangled, continuing to forward roll the slab for 10-100 mm, and then reversely rolling the slab for 5-90 mm by means of synchronous and opposite rotation of an upper and a lower embossing roller, wherein one time of forward rolling and one time of reverse rolling are referred to as reciprocal rolling; (4) forming a polar plate after several times of reciprocal rolling, and separating the polar plate from the embossing rollers; (5) performing subsequent treatment on the roll-formed flexible graphite polar plate.

Abstract: The disclosure discloses a strain and method for producing rosmarinic acid, and belongs to the technical field of bioengineering. The disclosure constructs a recombinant cell or a combination of recombinant cells expressing 4-coumarate: CoA ligase, rosmarinic acid synthase, polyphosphate kinase 2-I (PPK2-I) and polyphosphate kinase 2-II (PPK2-II), and utilizes the recombinant cell or the combination of recombinant cells to catalyze Danshensu and caffeic acid for synthesizing rosmarinic acid. The disclosure has good industrial application prospects.

Abstract: A gardening apparatus includes a tool device and a battery module. The battery module is coupled to the tool device for supplying power to drive the tool device. The battery module includes a housing with a receiving cavity, at least one battery cell disposed within the receiving cavity, a power management module electrically connected to the at least one battery cell and at least one power interface electrically connected to the power management module and accessible from outside the housing. The power management module is configured to control power flow between the at least one battery cell and the at least one power interface.

Abstract: The present disclosure provides an image processing method and device. The image processing method includes: performing, by an encoder and a first model, multiple iterations on an initial image to obtain a target image feature corresponding to the initial image; and performing, by a second model, image reconstruction based on the target image feature to obtain a reconstructed image of the initial image, both of the first model and the second model being neural networks for image reconstruction, wherein in the multiple iterations, an image feature extracted by the first model in the image reconstruction and an output image of the first model are feedback information for the encoder to assist the encoder in encoding the initial image.

Abstract: A method for prefabricating pore defects by controlling a SLM process, including performing laser scanning on a specified metal melt layer (LY) according to a first scan path (P1) and a second scan path. The first scan path (P1) and the second scan path (P2) have a path overlap zone (A0), the path overlap zone (A0) has a predetermined width, and laser energy input superimposed in the path overlap zone (A0) is controlled to reach a predetermined energy value, whereby keyholes are formed at a plurality of positions in a lengthwise direction of the path overlap zone (A0), the specified metal melt layer (LY) is taken as a defect layer, and the keyholes in the path overlap zone (A0) is taken as pore defects.

Abstract: The present application relates to an Informer-based autonomous satellite positioning accuracy prediction method and apparatus. The method includes: collecting satellite observation data of a train within a given operational section, there being an area where satellite signals are blocked within the given operational section, where the satellite observation data is satellite observation data collected by the train on the given operational section via a satellite positioning receiver; according to the satellite observation data on the given operational section, obtaining a prediction data set based on an effective value range of a preset three-dimensional position accuracy factor; and based on a preset accuracy prediction model, outputting an autonomous satellite positioning accuracy predictive value by taking the prediction data set as an input.

Abstract: A backlight module and a display device are disclosed. The backlight module includes a back plate and at least one light plate fixed onto the back plate. At least one first rivet post is disposed on a side of the light plate facing the back plate. The first rivet post penetrates the back plate and protrudes from a back side of the back plate. At least one second rivet post is disposed on the back side of the back plate. The second rivet post is arranged side by side with the first rivet post. The backlight module further includes an electrostatic assembly, which is connected to both the at least one first rivet post and the at least one second rivet post and conducts the at least one first rivet post and the at least one second rivet post with each other.