Abstract: The present disclosure relates to a visible light-catalyzed translucent concrete, and a preparation method and use thereof. The preparation method includes: extracting an iron oxide from a copper slag, mixing the iron oxide with TiO2 to obtain a photocatalyst, and then mixing the photocatalyst with an additive to obtain a photocatalytic slurry; preparing a concrete slurry using the copper slag after iron extraction as an aggregate; and pouring the photocatalytic slurry, the concrete slurry, and the photocatalytic slurry in sequence into a mold pre-laid with an optical fiber, to obtain the visible light-catalyzed translucent concrete. In the visible light-catalyzed translucent concrete, iron in the copper slag is used as a part of raw materials of the photocatalyst, and the copper slag after iron extraction is used as an aggregate to replace natural sand and gravel. This solves environmental pollutions caused by the copper slag and realizes resource utilization.

Abstract: A refrigerator control method, including: upon acquiring a signal indicating that a person approaches to open a door, controlling a camera to move from an initial position to a first position; upon acquiring a signal indicating that the door switches to an open status, controlling the camera to move to a second position; upon acquiring an opening angle of the door, and controlling the camera to capture an image of an interior of the door when the opening angle is less than a threshold angle; upon acquiring a signal indicating that the door switches to the closed status, controlling the camera to move to the first position and capture an image of an interior of the door; and upon acquiring a signal indicating that the door is closed, controlling the camera to return to the initial position and capture an image of an interior of the refrigerating compartment.

Abstract: A refrigerator control method, including: upon acquiring a signal indicating that a person approaches to open a door, controlling a camera to move from an initial position to a first position; upon acquiring a signal indicating that the door switches to an open status, controlling the camera to move to a second position; upon acquiring an opening angle of the door, and controlling the camera to capture an image of an interior of the door when the opening angle is less than a threshold angle; upon acquiring a signal indicating that the door switches to the closed status, controlling the camera to move to the first position and capture an image of an interior of the door; and upon acquiring a signal indicating that the door is closed, controlling the camera to return to the initial position and capture an image of an interior of the refrigerating compartment.