Abstract: A microcapsule of sustainable self-healing coal mine ventilation sealing material crack. The microcapsule includes a microcapsule core material and a microcapsule wall material. The microcapsule core material is prepared using a bacterial lyophilized powder and a substrate. By using urease-producing bacteria, there is provided a method of protecting bacteria to survive a long time in the cement-based material, supplying sufficient nutrient substances and reducing the impact of the doping of bacteria on the mechanical property of the cement-based material. The bacterial lyophilized powder and substrate are prepared into microcapsules which are added into the cement-based material when the cement-based material is mixed. In this case, once concrete cracks, the microcapsules breaks and the spores in the material are activated to perform normal metabolism so as to induce precipitation of calcium carbonate continuously, thereby continuously realizing self-healing of coal mine ventilation sealing material cracks.

Abstract: One embodiment is a method comprising collecting photoplethysmography (“PPG”) data associated with a user using a biometric monitoring device; extracting a signal quality metric (“SQM”) from the collected PPG data; classifying the PPG data signal based on the extracted SQM into one of a plurality of signal quality levels; and determining based on the classification whether to increase, decrease, or maintain a power level of an LED of the biometric monitoring device.

Abstract: The present disclosure discloses a method, an apparatus, and a system for providing a specified communications service, and a terminal, and belongs to the field of network technologies. The method includes: sending a specified communications service request to a signaling access server, the specified communications service request carrying a third-party application identifier and a first user identity of a local end, and the signaling access server being configured to provide a specified communications access service; if verification on the third-party application identifier and the first user identity is successful, establishing a signaling path to the signaling access server, the signaling path being configured to provide a signaling transmission interface to the signaling access server; and performing specified communication based on the signaling path.

Abstract: A method, system and server for pushing information are disclosed in the embodiments of the present invention. In the method, corresponding to position information, the server presets contacts used for pushing information as communication robots. The method comprises: receiving, by the server, a nearby contact search request from a client, wherein the search request includes current position information of the client; searching the contacts nearby the current position included in the information; returning the searched contacts to the client, wherein the searched contacts includes communication robots; receiving, by the server, a query request from the client for querying the communication robots, obtaining recommendation information corresponding to the query request and pushing the recommendation information to the client.

Abstract: This application discloses a method and an apparatus for multimedia communication. A session page is loaded by using a browser kernel integrated in a local client, and a script on the session page is executed by using the browser kernel, to perform the following operations: exchanging a control parameter with a peer client by using a signaling server; establishing a data channel between the local client and the peer client; collecting multimedia data and transmitting the multimedia data to the peer client through the data channel, so that the peer client plays the multimedia data by using a media stream parameter of the local client; and receiving, through the data channel, the multimedia data collected by the peer client, and playing the multimedia data on the session page according to a media stream parameter of the peer client. In this way, cross-client multimedia communication is implemented.

Abstract: Embodiments of the present disclosure disclose a live streaming method and system, a server, and a computer storage medium. The method includes: providing, by a first end for information interaction, a first audio/video live stream for a server, and providing, by a second end for information interaction, a second audio/video live stream for the server. The method further includes performing, by the server, coding and processing on the first audio/video live stream and the second audio/video live stream, to obtain a third audio/video live stream, and pushing the third audio/video stream to a third end for information interaction; and receiving, by the third end, audio/video content of the first end and the second end according to the third audio/video live stream.

Abstract: A data transmission method is performed at a data transmission system, including: receiving, by a transit device, audio/video data sent by a target client terminal that is in a target communication channel and has an audio/video upstream authority; forwarding, by the transit device, the audio/video data to a broadcast proxy device in the target communication channel, the broadcast proxy device being connected to at least one second client terminal that is in the target communication channel and does not have an audio/video upstream authority; and forwarding, by the broadcast proxy device, the audio/video data to each second client terminal in a corresponding downstream transmission mode according to network quality information of the second client terminal, the network quality information of each second client terminal being collected by the broadcast proxy device in advance.

Abstract: A data transmission method is performed at a data transmission system, including: receiving, by a transit device, audio/video data sent by a target client terminal that is in a target communication channel and has an audio/video upstream authority; forwarding, by the transit device, the audio/video data to a broadcast proxy device in the target communication channel, the broadcast proxy device being connected to at least one second client terminal that is in the target communication channel and does not have an audio/video upstream authority; and forwarding, by the broadcast proxy device, the audio/video data to each second client terminal in a corresponding downstream transmission mode according to network quality information of the second client terminal, the network quality information of each second client terminal being collected by the broadcast proxy device in advance.

Abstract: A data transmission method is performed at a data transmission system, including: receiving, by a transit device, audio/video data sent by a target client terminal that is in a target communication channel and has an audio/video upstream authority; forwarding, by the transit device, the audio/video data to a broadcast proxy device in the target communication channel, the broadcast proxy device being connected to at least one second client terminal that is in the target communication channel and does not have an audio/video upstream authority; and forwarding, by the broadcast proxy device, the audio/video data to each second client terminal in a corresponding downstream transmission mode according to network quality information of the second client terminal, the network quality information of each second client terminal being collected by the broadcast proxy device in advance.

Abstract: A data transmission method is performed at a data transmission system, including: receiving, by a transit device, audio/video data sent by a target client terminal that is in a target communication channel and has an audio/video upstream authority; forwarding, by the transit device, the audio/video data to a broadcast proxy device in the target communication channel, the broadcast proxy device being connected to at least one second client terminal that is in the target communication channel and does not have an audio/video upstream authority; and forwarding, by the broadcast proxy device, the audio/video data to each second client terminal in a corresponding downstream transmission mode according to network quality information of the second client terminal, the network quality information of each second client terminal being collected by the broadcast proxy device in advance.

Abstract: The present disclosure discloses a method, an apparatus, and a system for providing a specified communications service, and a terminal, and belongs to the field of network technologies. The method includes: sending a specified communications service request to a signaling access server, the specified communications service request carrying a third-party application identifier and a first user identity of a local end, and the signaling access server being configured to provide a specified communications access service; if verification on the third-party application identifier and the first user identity is successful, establishing a signaling path to the signaling access server, the signaling path being configured to provide a signaling transmission interface to the signaling access server; and performing specified communication based on the signaling path.

Abstract: The present disclosure is applicable to the field of Internet technologies, and provides a method and a system for creating and joining a group. The method includes submitting a group query request carrying a geographical identifier to a group server by using a client; and acquiring, by the group server in response to the query request, at least one location identifier matching the geographical identifier based on the geographical identifier carried in the query request, and extracting corresponding group information of one or more groups based on the matching location identifier. The method also includes sending, by the group server, the extracted group information of one or more groups corresponding to the matching location identifier to the client that submits the request; and joining, by the client, at least one of the one or more groups corresponding to the received group information.

Abstract: A method, system and server for pushing information are disclosed in the embodiments of the present invention. In the method, corresponding to position information, the server presets contacts used for pushing information as communication robots. The method comprises: receiving, by the server, a nearby contact search request from a client, wherein the search request includes current position information of the client; searching the contacts nearby the current position included in the information; returning the searched contacts to the client, wherein the searched contacts includes communication robots; receiving, by the server, a query request from the client for querying the communication robots, obtaining recommendation information corresponding to the query request and pushing the recommendation information to the client.

Abstract: In a method and device for trackball-based press positioning, when the trackball is under pressure, the multi-legged support that supports the trackball will be deformed, and then transmits the deformation information to the processing module. The processing module compares the deformation information with the deformation threshold information stored therein. When it is determined that the trackball is under pressure but not in contact with the pressure sensing module, the trajectory of the trackball is recorded by the positioning module, and corresponding operations are performed on the displayed information in accordance with the trajectory. The press positioning information of the trackball may be recognized, and corresponding operations may be determined in accordance with the information.

Abstract: The present invention provides a method for detecting probe-target substrate binding. In particular, the present invention provides a method for detecting a surface bound target complex by detecting the redox reaction of a redox transition metal complex that is catalyzed by a redox-catalyst complex.

Abstract: The present invention provides a method for detecting probe-target substrate binding. In particular, the present invention provides a method for detecting a surface bound target complex by detecting the redox reaction of a redox transition metal complex that is catalyzed by a redox-catalyst complex.