Abstract: The present invention provides a flexible circuit board and a multifunctional acoustic device. The flexible circuit board includes a first fixation portion, a second fixation portion spaced apart from the first fixation portion, and a connection portion connecting the first and the second fixation portion. The connection portion bends and extends obliquely and upwardly from an end of the first fixation portion, so that the connection portion forms a first convex portion higher than a plane of the first fixation portion. The multifunctional acoustic device includes a frame, a magnetic circuit system, a sounding unit, and a motor. The motor includes the flexible circuit board above. By reversely bending the arm of the flexible circuit board, the stress concentration area of the arm is avoided, and the fatigue life of the arm is greatly improved by changing the shape of the arm of the flexible circuit board.

Abstract: A method for deep learning. The method includes: receiving, by a deep learning model, a plurality of samples and a plurality of labels corresponding to the plurality of samples; adversarially augmenting, by the deep learning model, the plurality of samples based on a threat model; and assigning, by the deep learning model, a low predictive confidence to one or more adversarially augmented samples of the plurality of adversarially augmented samples having noisy labels due to the adversarially augmenting based on the threat model.

Abstract: The present disclosure discloses a flexible printed circuit board having a high reliability and includes an elastic arm, and a first end and a second end respectively extending from two ends of the elastic arm. A part of the elastic arm is provided with a thinning portion for changing stiffness distributions of the elastic arm during vibrating. The present disclosure also discloses a speaker using the flexible printed circuit board.

Abstract: High volume-rate three-dimensional (“3D”) ultrasound imaging using fast acoustic steering via tilting electromechanical reflectors is described. Ultrasound beams are directed towards one or more tilting reflectors, which are scanned through a range of tilt angles in order to image a 3D field-of-view with a high volume rate.