Abstract: A room area acquisition method includes: setting a room area initial value according to an air conditioner model parameter; acquiring a stable operation duration and a number of stop times of an air conditioner outdoor unit from starting up and stable operation to stopping at a temperature point; estimating a deviation between the room area initial value and a room area actual value according to the stable operation duration and the number of stop times, and outputting a deviation result; adjusting the room area initial value according to the deviation result, and performing estimation again according to an adjusted room area value; and taking the current room area value as the room area actual value when a deviation result output by current estimation is different from a deviation result output by last estimation.

Abstract: Provided are a preparation method of a piezoelectric composite material, and the application thereof. The preparation method includes: step 1, designing a curved-surface 3D printed mesh mold and forming the curved-surface 3D printed mesh mold by printing; step 2, cutting a blocky piezoelectric phase into a plurality of small piezoelectric columns; step 3, inserting the small piezoelectric columns into empty cells of the 3D printed mold; step 4, filling gaps between the piezoelectric columns and the 3D printed mold with a non-piezoelectric phase such as an epoxy resin, and curing and forming the non-piezoelectric phase; and step 5, grinding, polishing, and ultrasonically cleaning a prepared sample, and then performing an electrode coating operation on the sample to obtain a curved-surface piezoelectric composite material.

Abstract: A flash device endurance test method is provided. A flash device to be tested, which has a plurality of memory cells, includes multiple ports with the same and different test conditions. The method includes connecting the ports of the same test condition to the same pulse generation unit, and connecting the ports of different test conditions to different pulse generation units; generating by all of the pulse generation units, synchronous pulse voltage signals of N cycles, wherein one time of erasing-writing of the flash device is considered to be one of the cycles; and testing threshold voltages of erasing and writing states in each cycle.

Abstract: The present disclosure provides a flash device endurance test method, providing a flash device to be tested, which comprising a plurality of memory cells, the plurality of memory cells comprising multiple ports; connecting the ports of the same test condition to the same pulse generation unit, and connecting the ports of different test conditions to a pulse generation unit, respectively; generating by all the pulse generation units, synchronous pulse voltage signals of N cycles, respectively, wherein one time of erasing-writing of the flash device is considered to be one of the cycles; and testing threshold voltages of erasing and writing states in each cycle.

Abstract: A stopper for a beverage container is described. The stopper includes a stopper main body that is attached to an upper opening of a beverage container main body and includes a liquid through hole on the inside thereof; and a lid that is axially supported by a hinge shaft that is provided at an end of the stopper main body, and which opens and closes the liquid through hole in a rotational manner; the hinge shaft connects a hinge portion of the stopper main body, and right and left hinge portions of the lid; a storage portion is provided on at least one of the right and left hinge portions of the lid, and the hinge portion of the stopper main body; at least one end of the storage portion in the axis direction of the hinge shaft forms an opening; and a torsion spring is stored in the storage portion, and a cover member covers the opening of the storage portion.

Abstract: A stopper for a beverage container is described. The stopper includes a stopper main body that is attached to an upper opening of a beverage container main body and includes a liquid through hole on the inside thereof; and a lid that is axially supported by a hinge shaft that is provided at an end of the stopper main body, and which opens and closes the liquid through hole in a rotational manner; the hinge shaft connects a hinge portion of the stopper main body, and right and left hinge portions of the lid; a storage portion is provided on at least one of the right and left hinge portions of the lid, and the hinge portion of the stopper main body; at least one end of the storage portion in the axis direction of the hinge shaft forms an opening; and a torsion spring is stored in the storage portion, and a cover member covers the opening of the storage portion.