Abstract: The present disclosure provides a self-learning collaborative control method for active steering and yaw moment for a motor vehicle, including a first step of constructing fundamental formulas which are stored in a vehicle ECU, and a second step of calculating an active steering angle ?C and a yaw moment Mc on line by the vehicle ECU according to following sub-steps during a driving process of the motor vehicle, and controlling a driving state of the motor vehicle according to ?C and Mc. The second step includes a first sub-step of collecting raw real-time parameter values, a second sub-step of performing calculation by the identifier and the control target reference model, a third sub-step of calculating ?C and Mc. The present disclosure can realize the self-learning collaborative control of active steering and yaw moment without requiring a system control model and correct a driver's steering operation.

Abstract: A server receives an instant messaging message from a first user account to a second user account, the message includes a download address of a multimedia resource. In response to receiving the instant messaging message, in accordance with a determination that the instant messaging message includes a download address of a multimedia resource, and that the second user account is bound to a network attached storage (NAS) device: the server generates a download instruction in accordance with a command protocol of the NAS device bound to the second user account and sends the download instruction to the NAS device. The NAS device downloads the multimedia resource in accordance with the download instruction and a playing device plays the multimedia resource by accessing the NAS device.

Abstract: A tracking method for a video surveillance system includes: obtaining identification information for a first target object uploaded by a positioning system; obtaining time information and location information for the positioning system at the time the positioning system uploads the identification information; storing the identification information, the location information, and the time information in a preset database to obtain a storage result; and generating tracking information for the first target object according to the storage result.

Abstract: Embodiments of the present disclosure disclose an authorization method and an apparatus applied to an electronic lock. The method performed at a server hosting an instant messaging application includes: receiving an authorization request sent by a first instant messaging client at a first terminal, and the authorization request being used for requesting to grant use permission on the electronic lock to a second account; querying for, according to the authorization request, key information bound to the second account; and sending the key information to the electronic lock, the electronic lock being configured to add the key information into a trusted key information store. Moreover, the instant messaging application at the server can also be involved to further enhancing the authenticity of a person who tries to unlock the electronic lock based on the location of a terminal used by the person for accessing the instant messaging application.

Abstract: A server receives an instant messaging message from a first user account to a second user account, the message includes a download address of a multimedia resource. In response to receiving the instant messaging message, in accordance with a determination that the instant messaging message includes a download address of a multimedia resource, and that the second user account is bound to a network attached storage (NAS) device: the server generates a download instruction in accordance with a command protocol of the NAS device bound to the second user account and sends the download instruction to the NAS device. The NAS device downloads the multimedia resource in accordance with the download instruction and a playing device plays the multimedia resource by accessing the NAS device.

Abstract: Embodiments of the present disclosure disclose an authorization method and an apparatus applied to an electronic lock. The method performed at a server hosting an instant messaging application includes: receiving an authorization request sent by a first instant messaging client at a first terminal, and the authorization request being used for requesting to grant use permission on the electronic lock to a second account; querying for, according to the authorization request, key information bound to the second account; and sending the key information to the electronic lock, the electronic lock being configured to add the key information into a trusted key information store. Moreover, the instant messaging application at the server can also be involved to further enhancing the authenticity of a person who tries to unlock the electronic lock based on the location of a terminal used by the person for accessing the instant messaging application.

Abstract: A tracking method for a video surveillance system includes: obtaining identification information for a first target object uploaded by a positioning system; obtaining time information and location information for the positioning system at the time the positioning system uploads the identification information; storing the identification information, the location information, and the time information in a preset database to obtain a storage result; and generating tracking information for the first target object according to the storage result.