Abstract: Provided is a long moving distance electric pedal and vehicle. The electric pedal comprises a pedal body, a first mounting bracket, a second mounting bracket, a driving device, and two sets of transmission components; the transmission components include a first pivot plate and a second pivot plate, one end of which are hinged with the first or second mounting bracket, and the other end of which are hinged with one or the other end of the pedal body; when the pedal body is in a retracted state, the angle between the center lines of the first and second pivot plate is an acute angle, and the intersection point between the center lines of the first and second pivot plate is located above the connection point between the driving device and the transmission components. According to the above structure, a longer Y-axis travelling can be achieved with a smaller swing angle.

Abstract: Provided are a method for realizing a video conference, and a terminal and an SIP gateway. The method for realizing a video conference is applied to a WebRTC terminal, and comprises: performing interaction of SIP signaling with an SIP gateway by means of an SIP account, so as to establish a video conference connection with an SIP terminal, wherein SIP signaling between the WebRTC terminal and the SIP gateway is transmitted by means of a WebSocket protocol, and the WebRTC terminal can parse the received SIP signaling transmitted by means of the WebSocket protocol; and sending a locally collected video stream, and/or receiving a video stream of the SIP terminal, and playing same by means of a browser.

Abstract: A ventilation method for a high gas working face based on alternating intake and air return in a mine gallery is provided. In this method, an isolated island working face is divided into several sections along a strike direction. A coal pillar is alternately set as a conventional section and a gas-drainage section. Opposite coal pillars in the two mine galleries within the same section are respectively used as the conventional section and the gas-drainage section. Two mine galleries on both sides of the isolated island working face are alternately used as an intake gallery and a return gallery. The coal pillar at the side of the mine gallery as the return gallery is the gas-drainage section. A gas-drainage hole communicating a goaf is provided in the gas-drainage section, so that gas in the goafs at two sides of the isolated island working face can be extracted alternately.

Abstract: A ventilation method for a high gas working face based on alternating intake and air return in a mine gallery is provided. In this method, an isolated island working face is divided into several sections along a strike direction. A coal pillar is alternately set as a conventional section and a gas-drainage section. Opposite coal pillars in the two mine galleries within the same section are respectively used as the conventional section and the gas-drainage section. Two mine galleries on both sides of the isolated island working face are alternately used as an intake gallery and a return gallery. The coal pillar at the side of the mine gallery as the return gallery is the gas-drainage section. A gas-drainage hole communicating a goaf is provided in the gas-drainage section, so that gas in the goafs at two sides of the isolated island working face can be extracted alternately.

Abstract: Video-based interaction and video processing methods, an apparatus, a device, and a storage medium are provided. The video-based interaction method includes: in response to a target video being played back to a target image frame, displaying a mask comprising an interactive control on a video playback interface corresponding to the target image frame, the position of the display area of the interactive control on the mask having a correspondence with the display area of a target element on the target image frame, and the display image on the interactive control having a correspondence with the target element. When a trigger operation for the interactive control is received, a target page is displayed.

Abstract: Disclosed are a method, device and system for sending a virtual card and a readable storage medium, which are configured to receive at least one audio-video stream data of a plurality of participant terminals in communication connection with a server side; determine target audio-video stream data corresponding to at least one speaker from the at least one audio-video stream data; obtain biological characteristic information for identifying the at least one speaker from the target audio-video stream data, the biological characteristic information includes face characteristic information and/or voiceprint characteristic information; generate a virtual card according to the biological characteristic information; overlay the virtual card to the target audio-video stream data, and synthesize the target audio-video stream data with other audio-video stream data in response to there being a plurality of audio-video stream data into a to-be-sent audio-video stream data; send the to-be-sent audio-video stream data to

Abstract: The present disclosure discloses a classification method and system for fine-grained mixed sedimentary rocks, a medium and a terminal. Core description and thin section observation are used to accurately identify the sedimentary structure types and their vertical distribution characteristics from the macroscopic and microscopic perspectives, and indicates the mixed sedimentation characteristics of combination of different lamina or laminar couplets. The micro-drilling sampling technique is used to sample the samples with different types of sedimentary structures while avoiding diagenetic minerals. X-ray diffraction mineral content analysis and a high-precision carbon-sulfur analyzer are used to obtain the contents of different types of minerals and the total organic carbon contents in each sample, respectively, the basic rock type of each sample was determined using a triangular classification diagram.

Abstract: The present disclosure discloses a classification method and system for fine-grained mixed sedimentary rocks, a medium and a terminal. Core description and thin section observation are used to accurately identify the sedimentary structure types and their vertical distribution characteristics from the macroscopic and microscopic perspectives, and indicates the mixed sedimentation characteristics of combination of different lamina or laminar couplets. The micro-drilling sampling technique is used to sample the samples with different types of sedimentary structures while avoiding diagenetic minerals. X-ray diffraction mineral content analysis and a high-precision carbon-sulfur analyzer are used to obtain the contents of different types of minerals and the total organic carbon contents in each sample, respectively, the basic rock type of each sample was determined using a triangular classification diagram.

Abstract: Disclosed are a method, device and system for sending a virtual card and a readable storage medium, which are configured to receive at least one audio-video stream data of a plurality of participant terminals in communication connection with a server side; determine target audio-video stream data corresponding to at least one speaker from the at least one audio-video stream data; obtain biological characteristic information for identifying the at least one speaker from the target audio-video stream data, the biological characteristic information includes face characteristic information and/or voiceprint characteristic information; generate a virtual card according to the biological characteristic information; overlay the virtual card to the target audio-video stream data, and synthesize the target audio-video stream data with other audio-video stream data in response to there being a plurality of audio-video stream data into a to-be-sent audio-video stream data; send the to-be-sent audio-video stream data to

Abstract: Disclosed are an audio/video communication method, a terminal, a server, a computer device, and a storage medium. The audio/video communication method is applied to the terminal and includes: access a server and establish an audio/video conversation connection with another terminal by means of the server, collect an audio/video, perform coding compression on the audio/video, and package data after being subject to coding compression into an RTP data packer; and send the RTP data packet to the server on the basis of a UDP protocol, and the server forwards the RTP data packet to the another terminal.

Abstract: A video encoding apparatus includes a first processor and at least two encoders. The first processor is configured to divide a sequence of video frames into M first groups of pictures (GOPs) and send the M first GOPs to the at least two encoders, M being an integer greater than 1. The at least two encoders are configured to perform parallel encoding on the received M first GOPs to obtain M groups of video encoded data and send the M groups of video encoded data to the first processor. The first processor is further configured to merge the M groups of video encoded data into a video data stream.

Abstract: A method for improving the production of Streptomyces polyketide compounds is provided. The method greatly improves the capability of the Streptomyces polyketide compounds by strengthening a triacylglycerol decomposition pathway in Streptomyces during the stationary phase. A method for switching the primary metabolism of Streptomyces to the secondary metabolism, Streptomyces producing polyketide compounds, and use thereof are also provided.

Abstract: Provided are a method for realizing a video conference, and a terminal and an SIP gateway. The method for realizing a video conference is applied to a WebRTC terminal, and comprises: performing interaction of SIP signaling with an SIP gateway by means of an SIP account, so as to establish a video conference connection with an SIP terminal, wherein SIP signaling between the WebRTC terminal and the SIP gateway is transmitted by means of a WebSocket protocol, and the WebRTC terminal can parse the received SIP signaling transmitted by means of the WebSocket protocol; and sending a locally collected video stream, and/or receiving a video stream of the SIP terminal, and playing same by means of a browser.

Abstract: Disclosed are an audio/video communication method, a terminal, a server, a computer device, and a storage medium. The audio/video communication method is applied to the terminal and includes: access a server and establish an audio/video conversation connection with another terminal by means of the server, collect an audio/video, perform coding compression on the audio/video, and package data after being subject to coding compression into an RTP data packer; and send the RTP data packet to the server on the basis of a UDP protocol, and the server forwards the RTP data packet to the another terminal.

Abstract: A video encoding apparatus includes a first processor and at least two encoders. The first processor is configured to divide a sequence of video frames into M first groups of pictures (GOPs) and send the M first GOPs to the at least two encoders, M being an integer greater than 1. The at least two encoders are configured to perform parallel encoding on the received M first GOPs to obtain M groups of video encoded data and send the M groups of video encoded data to the first processor. The first processor is further configured to merge the M groups of video encoded data into a video data stream.

Abstract: A folder management method and device. The method includes: displaying a folder icon including a set of icons of at least two applications, and the set of icons is displayed as a thumbnail icon, and, in the thumbnail icon, each of the icons of the at least two applications is displayed in a shrunk size, and the folder icon further including an enlarged first icon associated with a first application, where the enlarged first icon is displayed adjacent to the thumbnail icon without the first icon, and where a size of the enlarged first icon is a same size as the thumbnail icon. The enlarged icon can be changed or displayed more according to application usage.

Abstract: A folder management method and device. The method includes: displaying a folder icon comprising a set of icons of at least two applications, and the set of icons is displayed as a thumbnail icon, and, in the thumbnail icon, each of the icons of the at least two applications is displayed in a shrunk size, and the folder icon further comprising an enlarged first icon associated with a first application, wherein the enlarged first icon is displayed adjacent to the thumbnail icon without the first icon, and wherein a size of the enlarged first icon is a same size as the thumbnail icon. The first application is determined according to a use time sequence or other factors. In this way, icons, of some applications, in the folder icon can be enlarged for display, which facilitates management of applications in the folder.

Abstract: The invention discloses a device for simulating an evolution process of an internal combustion engine exhaust particle flow for reducing automotive emissions, and the device comprises an exhaust source; an exhaust channel, comprising a plurality of sections of cylindrical tubes with specified length that are fixedly connected; a soluble organic compound generator, used to produce soluble organic compounds; a carbon particle generator, used to produce carbon particles. The device for simulating the evolution process of an internal combustion engine exhaust particle flow for reducing automotive emissions has the advantages of simple structure and low cost; controls the mixing concentration of soot particles and soluble organic compounds through various adjustment methods to obtain a suitable mixed aerosol, so as to better simulate the exhaust particle flow of an internal combustion engine.

Abstract: A method of manufacturing a polymer printed circuit board contains in a sequential order steps of: A), B), C), D, and F). In the step A), a material layer consisting of polymer is provided. In the step B), circuit pattern is formed on the material layer. In the step C), metal nanoparticles are deposited on the laser induced graphene (LIG) of the circuit pattern so as to use as a material seed. In the step D) a metal layer on the nanoparticles are deposited and the LIG of the circuit pattern are formed. In the step E), the circuit pattern is pressed. In the step E), the circuit pattern, the material layer, the metal nanoparticles, and the metal layer are pressed in a laminating manner to obtain the polymer printed circuit board.

Abstract: A system (10) for personalization of patient pathways and treatment options includes a patient information database (32) which stores patient data relating to a patient's medical records. A patient personalization system (12) receives the patient's lifestyle values and preferences and evaluates choices of pathways and treatments and a clinical decision support system (18) generates choices of pathways and treatments from the patient data and the patient's lifestyle values and preferences.