Abstract: A method for generating an active noise reduction filter includes: obtaining a physically noise-reduced signal, the physically noise-reduced signal being a signal received by a feedback microphone after a noise signal passes through an earphone, obtaining a mixed signal, the mixed signal being a signal received by the feedback microphone when the same noise signal is played and the earphone plays a through signal in a through state, calculating an input signal according to the mixed signal and the physically noise-reduced signal, performing adaptive filtering on the input signal and the physically noise-reduced signal according to an adaptive filtering algorithm to obtain a transfer function, and generating an active noise reduction filter according to the transfer function.

Abstract: A radar signal sending method and a device provides for the sending of the radar signal to cooperative radars. A first time domain range in L time domain ranges is determined. A first radar signal is sent in the first time domain range. Any one of the L time domain ranges partially overlaps at least one of the other (L?1) time domain ranges, and an absolute value of a difference between time domain start locations of any two of the L time domain ranges is greater than or equal to a first threshold and less than or equal to a second threshold.

Abstract: An image processing method is performed by an electronic device, the method including: obtaining, according to a quantity of pixels whose color feature values fall within color feature intervals in an original image, a first histogram corresponding to the original image; obtaining, according to a quantity of pixels whose color feature values fall within the color feature intervals in an upsampled image of the original image, a second histogram corresponding to the upsampled image; respectively determining, according to the first histogram and the second histogram, target color feature intervals matching the color feature intervals in the second histogram; and processing, according to the target color feature intervals matching the color feature intervals in the second histogram, the color feature values of the pixels falling within the color feature intervals in the upsampled image, to obtain a target image.

Abstract: An open acoustic device (100) may include a fixing structure (120) configured to fix the acoustic device (100) near an ear of a user without blocking an ear canal of the user; a first microphone array (130) configured to acquire environmental noise (410); a signal processor (140) configured to: determine, based on the environmental noise, a primary route transfer function (420) between the first microphone array (130) and the ear canal of the user; estimate, based on the environmental noise and the primary route transfer function, a noise signal (430) at the ear canal of the user; and generate, based on the noise signal at the ear canal of the user, a noise reduction signal (440); and a speaker (150) configured to output, according to the noise reduction signal, a noise reduction acoustic wave (450), the noise reduction acoustic wave being configured to eliminate the noise signal.

Abstract: A Carbon Fiber Reinforced Polymer (CFRP) concrete composite component with partitioned cathodic protection and an operation and maintenance method thereof are provided. The composite component includes multiple longitudinal reinforcements, in which a first area, a second area and a third area corresponding to underwater, splash and atmosphere are arranged along an extending direction of each longitudinal reinforcement, respectively; a first spiral rib, which is wound around the multiple longitudinal reinforcements in the first area; a second spiral rib, which is wound around the multiple longitudinal reinforcements in the second area; a third spiral rib, which is wound around the multiple longitudinal reinforcements in the third area; a concrete; a power supply, where the first spiral rib, the second spiral rib and the third spiral rib are connected with a positive electrode of the power supply, and the longitudinal reinforcement is connected with a negative electrode of the power supply.

Abstract: This application discloses a data transmission method performed by a computer device. It is detected that the ith forward reference frame is lost, during video decoding, when the (i+T+1)th forward reference frame is decoded, since a video frame in a first reference frame combination of the (i+T+1)th forward reference frame is located before the (i+T+1)th forward reference frame with an interval of T forward reference frames from the (i+T+1)th forward reference frame, T being a positive integer, so that before the (i+T+1)th forward reference frame is decoded, there is more time for retransmitting the ith forward reference frame, improving a possibility of completing retransmission of the ith forward reference frame during decoding of the (i+T+1)th forward reference frame, thereby reducing a possible waiting time for decoding the (i+T+1)th forward reference frame.

Abstract: A heating device and a manufacturing method therefor, and a heat-not-burn smoking device. The heating device includes a first heating assembly, including a first housing configured for contacting with a tobacco, a first heating element on the first housing and configured to generate heat when electrified, and a first insulator between the first heating element and the first housing. The first heating element generates heat when electrified, the heat is conducted to the first housing through the first insulator, to heat but not burn the tobacco. The heating device is formed by cooperation of the heating element, the insulator and the housing, and heats the tobacco by the heating element when electrified. Compared with a heating conductive layer formed by a thick film printing process, the manufacturing of the heating device is simpler and more convenient, and the consistency and service life of the product are greatly improved.

Abstract: Disclosed are a cyclic dinucleotide prodrug molecule, a preparation method therefor and an application thereof relating to the field of pharmaceuticals. The cyclic dinucleotide prodrug molecule has a structure shown in formula I, II, or III, can freely cross cell membranes and release cyclic dinucleotide, and has high cell activity.

Abstract: A display panel and a display device are provided. Each includes a light-emitting device layer including a first conductive layer, an organic layer, and a second conductive layer. The first conductive layer includes a first electrode electrically connected to a pixel driving circuit. The second conductive layer includes a second electrode disposed on a first portion located on the organic layer. The auxiliary structure includes a base, an auxiliary electrode, and an auxiliary portion. A cross-section of the base is trapezoidal in shape. The second electrode exceeds the first portion and is connected to the auxiliary electrode.

Abstract: Disclosed are a method and an apparatus for detecting a wearing state of an earphone, an earphone, and a storage medium. The method includes: obtaining a request for detecting the wearing state of the earphone; performing audio collection by a feedback microphone of the earphone to obtain a feedback audio signal; determining a frequency of the audio, and determining a target frequency with a power meeting a preset condition in the feedback audio signal based on the frequency and an audio collection parameter of the feedback microphone; performing a power spectrum analysis on the feedback audio signal to obtain a power spectrum of the feedback audio signal; determining target power information of the target frequency from the power spectrum; and in response to the target power information being not less than a maximum power threshold value set for the target frequency, determining that the wearing state is in-ear state.