Abstract: The disclosure relates to the field of intelligent home, and particularly to an indoor monitoring method, device and system, a storage medium and a camera device. The method includes: controlling a camera device to acquire monitoring images at consecutive times in a room; identifying a first monitoring image at a previous time and a second monitoring image at a current time, and identifying items corresponding to the first monitoring image and the second monitoring image and positions of the items, respectively; determining whether a position of an item changes according to the position of the item in the first monitoring image and the position of the item in the second monitoring image; and generating item record information of the item when it is determined that the position of the item changes, wherein the item record information represents movement of the item in the room.

Abstract: A flexible mechanism-based anti-backlash device for a planetary gear train, a gearbox, and a robot joint are provided. The anti-backlash device includes an integrated flexible planet carrier, an adjusting screw and a spring, the integrated flexible planet carrier is provided with a moving platform, the moving platform is provided with a spring hole, and the spring is sleeved outside the screw and is installed in the spring hole; when the threaded connection depth of the adjusting screw and the integrated flexible planet carrier reaches or exceeds a set depth, the adjusting screw can extrude the spring to make the moving platform generate elastic movement along a radial direction of the integrated flexible planet carrier, and the radial elastic movement is transformed into circumferential elastic rotation of a planet carrier bearing hole around the center of the planet carrier through an elastic connector.

Abstract: Water-based pressure sensitive adhesive compositions are disclosed comprising (a) an acrylic emulsion having a glass transition temperature of less than or equal to 20° C., (b) optionally, a dispersant or a silane-containing compound, and (c) an ethylene or propylene copolymer emulsion. In some embodiments, (a) comprises from 75 to 99 wt % of the compositions, (b), when present, comprises from 0.1 to 5 wt % of the compositions, and (c) comprises from 0.1 to 25 wt % of the composition, each based on the dry weight of the compositions. Methods for preparing water-based pressure sensitive adhesive compositions are also disclosed comprising emulsion polymerizing at least one unsaturated monomer, thereby forming an emulsion polymer having a glass transition temperature of less than or equal to ?10° C. and blending the emulsion polymer together with a dispersant or silane-containing compound and an ethylene or propylene copolymer emulsion.

Abstract: Disclosed in the present application are an anomaly recognition method and an anomaly recognition system for tracks of trucks. The method includes: obtaining a running track T according to global positioning system (GPS) data of running of a truck to be recognized; employing a track compression algorithm for the running track T to obtain a compressed track set C; employing a density-based clustering algorithm and performing grouping according to set time periods to obtain a network graph representing a motion track of each time period; inputting the network graph into a track embedding model established and trained in advance to obtain an explicit embedding vector corresponding to each network graph; and determining stability according to a distance between the vectors, and classifying points with the stability lower than a set threshold as abnormal tracks. The track embedding model is realized by employing a Skipgram model on the basis of a graph2vec algorithm.

Abstract: A map data processing method includes obtaining risk event information that includes time information and location information, where the time information indicates a predicted time range of a risk event, and the location information indicates a predicted region range of the risk event. Prediction of a risk event that may occur in a specific geographical region range can be provided. In addition, a lowest-risk path can be further planned based on the risk event information.

Abstract: An aqueous composition including multi-stage latex polymer particles is provided. The multi-stage latex polymer particles include (A) a first-stage polymer containing (i) an ethylenically unsaturated acid monomer with two carboxylic acid groups and (ii) a first vinyl monomer, and (B) a second-stage polymer containing (i) an ethylenically unsaturated monomer with an epoxy group and (ii) a second vinyl monomer. An article including a nonwoven textile impregnated with the aqueous composition is also provided.

Abstract: Embodiments of this application provide a communication method and apparatus, and a related device. The method includes: A first device sends first V2X unicast information to a second device, where the first V2X unicast information includes a first media access control MAC address and a first identifier; the first device receives second V2X unicast information from the second device, where the second V2X unicast information includes a second MAC address and a second identifier; and the first device generates another MAC address when the second V2X unicast information carries indication information, the first MAC address is the same as the second MAC address, and the first identifier is the same as the second identifier, where the indication information indicates that the second MAC address is a conflicting address.

Abstract: Generating first map information, where the first map information includes information about a first reference object set, and the information about the first reference object set indicates a first identifier, in a geographic area, of each reference object in at least one reference object included in the first reference object set, and indicates a first position of each reference object in the at least one reference object. The first map information is generated, and the first map information indicates related information of each reference object in the first reference object set, to implement a manner of expressing the related information of the reference object more abundantly, so that maps provided by different map vendors may use reference objects in the first map information to perform position expression on an element or an event.

Abstract: A flexible mechanism-based anti-backlash device for a planetary gear train, a gearbox, and a robot joint are provided. The anti-backlash device includes an integrated flexible planet carrier, an adjusting screw and a spring, the integrated flexible planet carrier is provided with a moving platform, the moving platform is provided with a spring hole, and the spring is sleeved outside the screw and is installed in the spring hole; when the threaded connection depth of the adjusting screw and the integrated flexible planet carrier reaches or exceeds a set depth, the adjusting screw can extrude the spring to make the moving platform generate elastic movement along a radial direction of the integrated flexible planet carrier, and the radial elastic movement is transformed into circumferential elastic rotation of a planet carrier bearing hole around the center of the planet carrier through an elastic connector.

Abstract: In a communication method, when MAC addresses in a plurality of VSI messages conflict, in response to only some of the VSI messages, a VSI message receiving end sends an action response message carrying a conflicting MAC address. In this way, a device that can correctly decrypt the action response message can decrypt, for a few times, ciphertext information in received action-request messages using a key of the device.

Abstract: The present disclosure discloses a door lock, a door lock controlling method and a door lock controlling device. The door lock includes a main controlling module, an unlocking module and a sensing module. The sensing module is configured to determine whether a human body is present within a first preset detection range; if yes, the main controlling module and the unlocking module are controlled to be powered on; and if no, the main controlling module and the unlocking module are controlled to be powered off. In the present disclosure, only the sensing module is in an operating state and other modules are not powered on when there is no user who is trying to open the door. Therefore, the power consumption of the door lock is reduced.

Abstract: A second device sends a first message to a first device to request the first device to establish a unicast connection to the second device. The first message carries a medium access control (MAC) address, an address identifier, and a security mechanism of the second device. The first device determines, based on the first message, that establishment of the unicast connection between the first device and the second device is abnormal, and sends a second message to the second device. The second message carries the MAC address, the address identifier, and an error identifier of the second device, so that the second device performs corresponding handling based on a reason why establishment of the unicast connection is abnormal that is indicated by the error identifier.

Abstract: A transmitter generates a V2X message, where the V2X message includes reference object indication information and position indication information, the reference object indication information indicates at least one reference object, and the position indication information indicates a position of a target object relative to the at least one reference object; the transmitter sends the V2X message to a receiver; and the receiver determines target position information of the target object based on the reference object indication information and the position indication information. In the foregoing process, the transmitter transfers relative position information relative to the reference object to the receiver by using the V2X message, and does not need to perform deflection. In addition, the V2X message indicates a reference object on which position information is based.

Abstract: In a communication method, when MAC addresses in a plurality of VSI messages conflict, in response to only some of the VSI messages, a VSI message receiving end sends an action response message carrying a conflicting MAC address. In this way, a device that can correctly decrypt the action response message can decrypt, for a few times, ciphertext information in received action-request messages using a key of the device.

Abstract: Generating first map information, where the first map information includes information about a first reference object set, and the information about the first reference object set indicates a first identifier, in a geographic area, of each reference object in at least one reference object included in the first reference object set, and indicates a first position of each reference object in the at least one reference object. The first map information is generated, and the first map information indicates related information of each reference object in the first reference object set, to implement a manner of expressing the related information of the reference object more abundantly, so that maps provided by different map vendors may use reference objects in the first map information to perform position expression on an element or an event.

Abstract: Provided is a method and device for low-carbon integrated energy system scheduling. A specific embodiment of this method comprise: obtaining the energy device information set for each energy device in the virtual power plant; generating the acquisition cost information for each energy device based on an energy device name, energy device parameter information and an energy device number in the energy device information set; generating the energy scheduling objective values and the parameter information of each energy device based on the preset constraint sets and energy acquisition cost information of each energy device; controlling each energy device in the virtual power plant to execute the energy scheduling tasks based on the objective energy device parameter information.