Abstract: A speaker comprises a housing, a transducer residing inside the housing, and at least one sound guiding hole located on the housing. The transducer generates vibrations. The vibrations produce a sound wave inside the housing and cause a leaked sound wave spreading outside the housing from a portion of the housing. The at least one sound guiding hole guides the sound wave inside the housing through the at least one sound guiding hole to an outside of the housing. The guided sound wave interferes with the leaked sound wave in a target region. The interference at a specific frequency relates to a distance between the at least one sound guiding hole and the portion of the housing.

Abstract: The present application discloses a sound-output device, including a signal processing circuit, configured to generate a bone-conducted control signal and an air-conducted control signal based on an initial sound signal; a vibration speaker, configured to generate a bone-conducted sound wave based on the bone-conducted control signal; and an air-conduction speaker, configured to generate an air-conducted sound wave based on the air-conducted control signal, wherein a signal component of at least partial frequency band in the air-conducted control signal has an amplitude and a phase canceling at least partial leakage of sound generated by the vibration speaker, such that at least partial component in the air-conducted sound wave cancels the at least partial leakage of sound.

Abstract: Provided are an audio/video processing method and apparatus, a device, and a storage medium. The method comprises: displaying text data corresponding to an audio/video to be edited, wherein the text data has a mapping relation with an audio/video timestamp of said audio/video; displaying said audio/video according to a time axis track; in response to a preset operation triggered for target text data in the text data, determining an audio/video timestamp corresponding to the target text data as a target audio/video timestamp; and processing, on the basis of the preset operation, an audio/video clip corresponding to the target audio/video timestamp in said audio/video.

Abstract: Methods for configuring a patterning process based on results of another patterning process is described. The method includes obtaining a first set of contours by simulating a first patterning process using a design layout in a first orientation. The contours satisfy a design specification associated with the design layout and correspond to a first set of process window conditions. A second patterning process is configured based on a second orientation of the design layout, the first set of process window conditions and the first set of contours. The second patterning process is associated with one or more design variables (e.g., illumination, mask pattern) that affect a second set of contours. The configuring includes adjusting one or more design variables until the second set of contours are within a desired matching threshold with the first set of contours.

Abstract: The present disclosure discloses an acoustic output device. The acoustic output device may include a first acoustic driver including a first diaphragm; a second acoustic driver including a second diaphragm; a control circuit electrically connected with the first acoustic driver and the second acoustic driver respectively, the control circuit provides a first electrical signal for driving a vibration of the first diaphragm, and a second electrical signal for driving a vibration of the second diaphragm, and a phase of the first electrical signal and a phase of the second electrical signal are opposite; and a housing supporting the first acoustic driver and the second acoustic driver, wherein a sound generated by the vibration of the first diaphragm is radiated outward through a first sound guide hole on the housing, and a sound generated by the vibration of the second diaphragm is radiated outward through a second sound guide hole on the housing.

Abstract: The present application discloses a sound-output device, including a vibration speaker configured to generate a bone-conducted sound wave; and an air-conducted speaker configured to generate an air-conducted sound wave. The sound-output device further comprises a signal processing module configured to generate a control signal, wherein, the vibration speaker includes a vibration assembly electrically connected to the signal processing module to receive the control signal, and generate the bone-conducted sound wave based on the control signal, and the air-conducted speaker includes a housing coupled to the vibration assembly to generate the air-conducted sound wave based on the bone-conducted sound wave.

Abstract: A battery pack includes a battery pack box with an internal space including a first region to an n-th region, each provided with a battery cell. A positive electrode active substance in a positive electrode of each k-th battery cell includes lithium iron phosphate and/or lithium nickel cobalt manganate having a first discharge voltage plateau and one or more types of supplementary active substances having a second discharge voltage plateau. For the first battery cell to the n-th battery cell, in any case where a sum of a discharge capacity corresponding to the first discharge voltage plateau and a discharge capacity corresponding to the second discharge voltage plateau is 100%, a discharge capacity proportion corresponding to the second discharge voltage plateau of the k-th battery cell is greater than a discharge capacity proportion corresponding to the second discharge voltage plateau of the (k?1)-th battery cell.

Abstract: Disclosed are a dual-motor multi-gear hybrid transmission system and a vehicle. The dual-motor multi-gear hybrid transmission system includes an engine, a first motor, a second motor, a first clutch, a second clutch, a first planet row, a second planet row, a first input shaft, a second input shaft, a third input shaft and a brake assembly. The first input shaft is connected to the engine through the first clutch. The second input shaft is connected to the engine through the second clutch, and the second input shaft is sleeved outside the first input shaft. The first motor is connected to the engine. The second motor is connected to the first planet row through the third input shaft. The brake assembly is configured to brake the first planet row and/or the second planet row.

Abstract: A battery pack includes a first battery cell, a second battery cell, and a third battery cell. A positive electrode active substance of each battery cell is composed of lithium iron phosphate and a low-temperature additive. The low-temperature additive is selected from compounds containing at least two carbonyl groups, which are conjugated with an unsaturated structure or an atom having lone-pair electrons connected with the carbonyl groups, and a discharging cut-off voltage of the battery pack at a low temperature has the following rules: discharging cut-off voltages V1, V2, and V3 of the first battery cell, second battery cell, and third battery cell range from 1.95V to 2.1V, from 1.8 V to 2.0V, from 1.6V to 1.9V, respectively, and V1, V2, and V3 satisfy a relationship of V1>V2>V3.

Abstract: A method for repairing an ultra-thin structure by additive manufacturing by removing a damaged region of an ultra-thin structure by machining; acquiring a three-dimensional model of a region to be repaired; processing the three-dimensional model; constructing a powder carrying device on the periphery of the bottom of the region to be repaired, and allowing powder in the powder carrying device to be filled until flush with or tangent to the surface of the bottom of the region; melting, sintering or curing the powder around the outer contour of the ultra-thin structure by a high-energy beam or an auxiliary heating device, and combining the powder with the outer contour of the ultra-thin structure to form an outer contour thickened structure so as to form a flexible fixture; and repairing the region to be repaired by additive manufacturing technology according to a planned path obtained from the model processing.

Abstract: The present disclosure may provide an acoustic device. The acoustic device may include a housing, at least one low-frequency acoustic driver, at least one high-frequency acoustic driver, and a noise reduction assembly. The housing may be configured to be rested on a shoulder of a user. The at least one low-frequency acoustic driver may be carried by the housing and configured to output first sound from at least two first sound guiding holes. The at least one high-frequency acoustic driver may be carried by the housing and configured to output second sound from at least two second sound guiding holes. The noise reduction assembly may be configured to receive third sound and reduce noise of the third sound.

Abstract: The present disclosure discloses an acoustic output apparatus. The acoustic output apparatus may include at least one acoustic driver. The at least one acoustic driver may generate sound that is output through at least two sound guiding holes. Further, the acoustic output apparatus may include a supporting structure. The supporting structure may be configured to support the at least one acoustic driver. A baffle may be disposed between the at least two sound guiding holes. The baffle may increase an acoustic distance from at least one sound guiding hole of the at least two sound guiding holes to a user's ear.

Abstract: The present disclosure discloses an acoustic output device. The acoustic output device may include at least one acoustic driver configured to generate sounds and a housing structure configured to carry the at least one acoustic driver. The housing structure may include a cavity, and the at least one acoustic driver may be arranged in the cavity and may divide the cavity into a first cavity and a second cavity. And the sounds generated by the at least one acoustic driver may be transmitted from the first cavity and the second cavity, respectively, pass through the housing structure, and form dual sound sources arranged on two sides of an auricle, respectively.