Abstract: Embodiments of this application belong to the field of audio technologies, and provide a volume management method and an electronic device. The method is applicable to a smart terminal, including: sending a message to a Bluetooth audio device; receiving a message sent by the Bluetooth audio device, where the message includes a CT attribute and a TG attribute determined by the Bluetooth audio device based on an AVRCP; determining, according to the TG attribute, whether the Bluetooth audio device supports an absolute volume; and setting an absolute-volume switch control corresponding to the Bluetooth audio device to a displayed state when it is determined that the Bluetooth audio device supports the absolute volume. According to the method, it is determined, based on the TG attribute in the Bluetooth AVRCP, whether the Bluetooth audio device supports an absolute volume attribute, thereby improving accuracy of identifying an absolute volume of a device.

Abstract: A method for processing parking space information includes detecting, before a driver sends information for requesting an effective parking space, whether an idle parking space exists in a traveling environment of a vehicle and recording information about the idle parking space. After the driver sends the information for requesting an effective parking space, stored information about one or more effective parking spaces is then recommended to the driver.

Abstract: This application provides a charging plug and socket-outlet, charging and to-be-charged apparatuses, a charging system, and a control method. The charging system includes: a charging apparatus and a to-be-charged apparatus. The charging apparatus includes a charging plug and a first cooling system. The charging plug includes a first electrical transmission interface, a first heat conduction output interface, and a first heat conduction input interface. The to-be-charged apparatus includes a battery, a charging socket-outlet, and a second cooling system. The charging socket-outlet includes a second electrical transmission interface, a second heat conduction output interface, and a second heat conduction input interface. The solutions of this application can be used to meet a heat dissipation requirement of the battery in the to-be-charged apparatus during super charging.

Abstract: A method for diagnosing a diesel oxidation catalyst fault includes: obtaining an standard molar enthalpy of formation-revolution speed-load table; obtaining a revolution speed, a load, a temperature difference of front and rear exhaust pipes, and a casing temperature, obtaining an standard molar enthalpy of formation corresponding to the revolution speed and the load from the standard molar enthalpy of formation-revolution speed-load table, and calculating an actual formation enthalpy corresponding to the temperature difference of front and rear exhaust pipes and the casing temperature from the temperature difference of front and rear exhaust pipes and the casing temperature; calculating a standard reaction enthalpy from the standard molar enthalpy of formation and standard conversion efficiency; and diagnosing a diesel oxidation catalyst fault by comparing the actual formation enthalpy with the standard reaction enthalpy.

Abstract: An input device and an input method are provided. An example input device may include a projection module configured to project an image. The projection module is configured to be movable to cause a variation in the projected image. The variation indicates direction information about the movement to control movement of a controlled target.

Abstract: The invention provides a cache device and method for performing a cache process on a cache memory having a high capacity in a high speed. The cache processing section performs a cache process composed of two-stage processes, a query process (P1) and a subsequent process (P2). In the query process (P1), the respective index tables and the identifier table are used to query whether the target identifier is present in the cache memory at a step (S101). If it is present, a data address of the target identifier in the cache memory is transmitted to the CPU. Otherwise, a data address of an identifier for a previously prepared ultimate LRU in the cache memory is transmitted to the CPU at a step (S102). In a subsequent process (P2), adjustment operations for the respective tables, regarding insertion of an identifier for a new data and deletion of the identifier for the ultimate LRU data, are performed at a step (S201).

Abstract: The invention provides a cache device and method for performing a cache process on a cache memory having a high capacity in a high speed. The cache processing section performs a cache process composed of two-stage processes, a query process (P1) and a subsequent process (P2). In the query process (P1), the respective index tables and the identifier table are used to query whether the target identifier is present in the cache memory at a step (S101). If it is present, a data address of the target identifier in the cache memory is transmitted to the CPU. Otherwise, a data address of an identifier for a previously prepared ultimate LRU in the cache memory is transmitted to the CPU at a step (S102). In a subsequent process (P2), adjustment operations for the respective tables, regarding insertion of an identifier for a new data and deletion of the identifier for the ultimate LRU data, are performed at a step (S201).