Abstract: A lock, a vehicle parking system, and a vehicle parking method are provided. The lock includes a main body, a lock switch, a lock controller, a lock communication circuit, and a battery. The battery is connected to the lock switch, the lock controller, and the lock communication circuit, and configured to supply electrical energy to the lock switch, the lock controller, and the lock communication circuit. The lock communication circuit is connected to the lock controller, and transmits a locking instruction or an unlocking instruction to the lock controller when receiving the locking instruction or the unlocking instruction from a second device located outside the lock. The lock controller is connected to the lock switch connected to the main body, and the lock controller controls, when receiving the locking instruction or the unlocking instruction, the main body to perform a locking operation or an unlocking operation through the lock switch.

Abstract: A method for constructing a large-span station by two-wing open type semi-covered excavation and semi-reverse construction, is divided into three stages of excavation. First, excavate a first-stage inner small foundation pit, then excavate a second-stage annular foundation pit within the first-stage retaining piles and outside the range of the first-stage inner small foundation pit, and finally excavate a third-stage semi-covered excavation foundation pit below the first-stage inner small foundation pit and the second-stage annular foundation pit. By setting graded retaining piles, middle upright post piles, middle top plates, local waist beams and local concrete supports in the soil-rock combination strata, so that the force transfer between the foundation pit enclosure and the station main body structures and the underlying rock layer is clear and reliable, and a stable frame structure is achieved.

Abstract: A method for constructing a large-span station by two-wing open type semi-covered excavation and semi-reverse construction, is divided into three stages of excavation. First, excavate a first-stage inner small foundation pit, then excavate a second-stage annular foundation pit within the first-stage retaining piles and outside the range of the first-stage inner small foundation pit, and finally excavate a third-stage semi-covered excavation foundation pit below the first-stage inner small foundation pit and the second-stage annular foundation pit. By setting graded retaining piles, middle upright post piles, middle top plates, local waist beams and local concrete supports in the soil-rock combination strata, so that the force transfer between the foundation pit enclosure and the station main body structures and the underlying rock layer is clear and reliable, and a stable frame structure is achieved.

Abstract: This application discloses example distributed cross-device collaboration methods, electronic devices, and communication system. One example method includes displaying, by a first device, first information in response to receiving a first operation of a user, wherein the first information comprises device information of the first device and application information of a first application, and the application information of the first application is used by a second device to determine that the first application is installed on the second device. In response to receiving a channel establishment request of the second device, the first device establishes a communication channel for display with the second device, wherein the device information of the first device is used to perform security verification when the first device establishes the communication channel for display with the second device. The first device displays the first application with the second device by using the communication channel for display.

Abstract: A device positioning method includes a first electronic device sending, at each of a first position and a second position, a BLUETOOTH positioning signal to a second electronic device in response to a detected shake operation performed on the first electronic device. The first electronic device receives first response information sent by the second electronic device. The first electronic device determines first position information of the second electronic device based on the first response information. The first electronic device displays a second interface, and the second interface includes the first position information and the identifier of the second electronic device.

Abstract: A page processing method is provided. The page processing method includes: when a preset trigger instruction for a currently running application is detected, displaying a historical browsing view of the application, where the historical browsing view is established based on page browsing information, and the page browsing information includes one or more browsing pages browsed by a user; and returning, in response to a selection operation performed by the user in the historical browsing view, to a target browsing page corresponding to the selection operation, where the target browsing page is any of the browsing pages. In this way, a page returning operation is simplified, and the user can easily and quickly return to the browsing page specified by the user, which improves user experience.

Abstract: A direct-drive system for a passenger transportation apparatus, and a passenger transportation apparatus having same. The direct-drive system comprises: a motor comprising a motor output shaft, for providing power; a main drive shaft for transmitting the power to a passenger transportation portion of the passenger transportation apparatus; and a gear box comprising an input end connected to the motor output shaft and an output end connected to the main drive shaft respectively, and being used for transmitting the power, provided by the motor, to the main drive shaft, wherein the gear box comprises a plurality of gear pairs, and each of the gear pairs has a progressively decreasing gear slope along the direction from the input end of the gear box to the output end thereof.

Abstract: The present utility model provides a direct-drive system for a passenger transportation apparatus, and a passenger transportation apparatus having same. The direct-drive system comprises: a motor comprising a motor output shaft, for providing power; a main drive shaft for transmitting the power to a passenger transportation portion of the passenger transportation apparatus; and a gear box comprising an input end connected to the motor output shaft and an output end connected to the main drive shaft respectively, and being used for transmitting the power, provided by the motor, to the main drive shaft, wherein the gear box comprises a plurality of gear pairs, and each of the gear pairs has a progressively decreasing gear slope along the direction from the input end of the gear box to the output end thereof. The reliability of the entire set of direct-drive system is greatly improved.