Abstract: The present disclosure provides an earphone including a sound production component and an ear hook which is configured to place the sound production component at a position near an ear canal but not blocking the ear canal. The sound production component and an auricle have a first projection and a second projection on a sagittal plane, respectively, and a centroid of the first projection has a first distance from a highest point of the second projection in a vertical axis direction. A ratio of the first distance to a height of the second projection in the vertical axis direction is in a range of 0.25-0.6, and a ratio of a distance from a center of a sound outlet provided on an inner side surface to a lower side surface of the sound production component to a short-axis dimension of the sound production component is in a range of 0.25-0.50.

Abstract: The present disclosure relates to an earphone, comprising: a sound production component, at least a portion of the sound production component extending into a concha cavity; ear hook disposed between an auricle and a head of the user, extending toward a side of the auricle away from the head, and connecting the sound production component; in a non-wearing state, the ear hook and the sound production component form a first projection on a first plane comprising an outer contour, a first end contour, an inner contour, and a second end contour, the outer contour, the first end contour, the second end contour, and a tangent segment connecting the first end contour and the second end contour define a first closed curve, a ratio of a projection area of the sound production component on the first plane to a first area of the first closed curve is between 0.25 and 0.4.

Abstract: The present disclosure provides an open earphone comprising a sound production component and an ear hook. In a wearing state, a first portion of the ear hook is hung between user's auricle and head, and a second portion of the ear hook extends towards a side of the auricle away from the head and connects to the sound production component to place the sound production component in a position near an ear canal but not blocking the ear canal. An inner side surface of the housing facing the auricle is provided with a sound outlet, one or more other side walls of the housing are provided with at least two pressure relief holes including a first pressure relief hole and a second pressure relief hole. A distance between centers of the first pressure relief hole and the second pressure relief hole is between 13.0 mm and 15.2 mm.

Abstract: The earphone includes a sound generation component including a transducer; at least a portion of the sound generation component extending into a concha cavity of a user; and an ear hook including a first portion and a second portion, the second portion being connected to the first portion, and being connected to the sound generation component to place the sound generation component at a position near an ear canal without blocking an opening of the ear canal. The sound generation component has a first projection on a sagittal plane, and the auricle has a second projection on the sagittal plane. A centroid of the first projection may have a first distance from a highest point of the second projection in a vertical axis direction. A ratio of the first distance to a height of the second projection in the vertical axis direction may be in a range of 0.35-0.6.

Abstract: The present disclosure relates to acoustic technology, in particular to an earphone including a sound generation portion. The sound generation portion includes a transducer and a housing for accommodating the transducer. The earphone further includes an earhook. The earhook includes a first portion and a second portion. The first portion may be hung between an auricle and the head of a user, and the second portion may be connected to the first portion, extends toward an anterolateral side of the auricle, and may be connected to the sound generation portion. The sound generation portion may be fixed near an ear canal without blocking an opening of the ear canal. In at least one frequency range, when an input current of the transducer does not exceed 35.3 mA, a maximum sound pressure that the sound generation portion is able to provide to the ear canal may not be smaller than 75 dB.

Abstract: The present disclosure relates to an open earphone. The open earphone may include a sound production device and an ear hook including a first part and a second part connected in sequence. The first part may be hooked and arranged between an auricle and a head of a user. The second part may extend to a front lateral surface of the auricle and may be connected to the sound production device. The sound production device may be worn at a position that is near an ear canal without blocking an earhole of the user. The sound production device may be at least partially inserted into an auricular concha cavity of the user. An overlap ratio of a projection area of the sound production device on a sagittal plane to a projection area of the auricular concha cavity on the sagittal plane may be not less than 44.01%.

Abstract: This application provides a drive and a data transmission method, to implement low-latency transmission. The drive includes a CDR circuit, an elastic buffer, a receiver circuit, and a transmitter circuit. The CDR circuit is configured to recover a receive clock from a received signal. The receiver circuit is configured to recover sent data from the received signal by using the receive clock. The elastic buffer is configured to move the sent data in by using the receive clock and move the data out by using the receive clock. The transmitter circuit is configured to send the sent data from the elastic buffer by using the receive clock.

Abstract: The earphone includes a sound generation component including a transducer; at least a portion of the sound generation component extending into a concha cavity of a user; and an ear hook including a first portion and a second portion, the second portion being connected to the first portion, and being connected to the sound generation component to place the sound generation component at a position near an ear canal without blocking an opening of the ear canal. The sound generation component has a first projection on a sagittal plane, and the auricle has a second projection on the sagittal plane. A centroid of the first projection may have a first distance from a highest point of the second projection in a vertical axis direction. A ratio of the first distance to a height of the second projection in the vertical axis direction may be in a range of 0.35-0.6.

Abstract: A method of wireless communication includes grouping, by a network device, rate matching resources into a plurality of first groups for communication with a wireless terminal and transmitting a channel control indicator identifying at least a first group from the plurality of first groups of rate matching resources. In various embodiments, the rate matching resources include one or more of a rate matching pattern comprising multiple time-frequency transmission resources, a periodic zero power channel state information reference signal (ZP CSI-RS) resource set, an aperiodic ZP CSI-RS resource set, a semi-persistent ZP CSI-RS resource set, a long-term evolution cell specific reference signal (LTE CRS) resource, or a rate matching pattern group.

Abstract: A novel positive electrode sheet, a secondary battery, a battery module, a battery pack and an electrical apparatus are described. The positive electrode sheet includes a positive electrode current collector and a positive electrode film layer with a single-layer structure or a multi-layer structure. When the positive electrode film layer is a single-layer structure, at least one of the positive electrode film layers comprises a first positive electrode active material and a second positive electrode active material; and/or, when the positive electrode film layer is a multi-layer structure, at least one layer of at least one of the positive electrode film layers comprises a first positive electrode active material and a second positive electrode active materials. The first positive electrode active material includes an inner core, a first cladding layer comprising crystalline pyrophosphates, a second cladding layer comprising crystalline phosphate, and a third cladding layer.

Abstract: Disclosed are techniques, systems, apparatuses, and methods of wireless communication. In one aspect, a method of wireless communication is disclosed. The method includes transmitting, by a first communications node to a second communications node, a set of information for transmission of reference signals or channels, wherein the set of information includes: timing information related to a transmission timing of the reference signals or channels, timing information related to when an antenna group or a group of reference signals and/or channels related to the antenna group is activated, or an identification of one or more antenna groups associated with the reference signals or channels.

Abstract: Provided is a method for manufacturing a catalyst with which it is possible to obtain a supported metal ammonia synthesis catalyst, in which there are restrictions in terms of producing method and producing facility, and particularly large restrictions for industrial-scale producing, in a more simple manner and so that the obtained catalyst has a high activity. This method for manufacturing an ammonia synthesis catalyst includes: a first step for preparing 12CaO·7Al2O3 having a specific surface area of 5 m2/g or above; a second step for supporting a ruthenium compound on the 12CaO·7Al2O3; and a third step for performing a reduction process on the 12CaO·7Al2O3 supporting the ruthenium compound, obtained in the second step. This invention is characterized in that the reduction process is performed until the average particle diameter of the ruthenium after the reduction process has increased by at least 15% in relation to the average particle diameter of the ruthenium before the reduction process.

Abstract: The present disclosure relates to an earphone, comprising: a sound production component, at least a portion of the sound production component extending into a concha cavity; ear hook disposed between an auricle and a head of the user, extending toward a side of the auricle away from the head, and connecting the sound production component; in a non-wearing state, the ear hook and the sound production component form a first projection on a first plane comprising an outer contour, a first end contour, an inner contour, and a second end contour, the outer contour, the first end contour, the second end contour, and a tangent segment connecting the first end contour and the second end contour define a first closed curve, a ratio of a projection area of the sound production component on the first plane to a first area of the first closed curve is between 0.25 and 0.4.

Abstract: Embodiments of the present disclosure provide a speaker. The speaker may include a diaphragm; a magnetic circuit component; and a coil connected to the diaphragm, at least part of the coil being arranged in a magnetic gap formed by the magnetic circuit component, and the coil driving the diaphragm to vibrate to generate sound after the coil being energized. The diaphragm may include a main-body region and a folded-ring region surrounding the main-body region, the main-body region may include a first inclined section and a first connecting section connected to the coil, the first inclined section may be attached to a portion of the folded-ring region, and the first inclined section may be tilted in a direction away from the coil with respect to the first connecting section.

Abstract: Provided are an information determination method and apparatus, a signal reception method and apparatus and a signal transmission method and apparatus. The information determination method includes determining quasi-co-location reference signal information about an aperiodic measurement reference signal resource according to at least one of a relationship between a first threshold and a time interval, whether an intersection is null, or a time offset or a predetermined rule.

Abstract: The present invention provides a keratin BD-3, a nucleic acid molecule encoding same, an expression vector, a host cell, a preparation method therefor, and a pharmaceutical composition contained the keratin BD-3. The keratin BD-3 can be used in the preparation of medicament for antipyretic, analgesic, antitussive, expectorant, anticonvulsant, antiepileptic, anti-hypertension, anti-inflammatory, and antiviral.

Abstract: Embodiments of this application disclose a noise cancellation apparatus and method. The noise cancellation apparatus includes a main control unit and a noise cancellation processing circuit. The main control unit determines a noise cancellation parameter based on a noise cancellation level index or a feature value for determining a matching degree between a headset and an ear canal of a user. The noise cancellation processing unit obtains an inverse phase noise of an ambient noise based on the noise cancellation parameter. After the inverse phase noise is mixed with a played downlink audio signal, the ambient noise can be canceled. In addition, because the noise cancellation parameter is determined from a preset noise cancellation parameter library based on the received or autonomously determined noise cancellation level index, instead of being uniformly configured, a noise cancellation level can be flexibly adjusted, thereby improving a noise cancellation effect and user experience.

Abstract: The invention relates to the field of aluminum wheel casting molds, and more particularly relates to a closed-loop control method and system for a mold temperature in a wheel casting process. The control method includes: step 1, acquiring data, that is, acquiring a plurality of mold position temperatures, and cooling pipeline opening and closing signals in a target wheel casting process according to a fixed frequency; step 2, storing, based on acquired mold opening and closing signals of casting equipment, the acquired data in a database in the form of a unique ID according to a single wheel casting process; step 3, calculating new process parameters based on the acquired plurality of position temperatures and time; and step 4, integrating the calculated process parameters, and issuing the process parameters to a PLC of a casting equipment to perform new casting.

Abstract: Methods, systems, and devices for wireless communications are described. A transmitting device may transmit an expiration indication to a receiving device as part of a scheduling message for a transport block. The expiration indication may provide information related to an expiration time for the transport block. If the expiration time is reached prior to successful reception by a receiving device, the receiving device may assume that the transport block has expired and may refrain from transmitting a retransmission grant, or may empty a hybrid automatic repeat request (HARM) buffer associated with the transport block. If the transmitting device fails to successfully receive an indication from the receiving device of a successful reception of the transport block prior to the expiration period, the transmitting device may also assume that the transport block has expired.

Abstract: In some embodiments, a method for processing an optical fiber includes: drawing an optical fiber through a draw furnace, conveying the optical fiber through a flame reheating device downstream from the draw furnace, wherein the flame reheating device comprises one or more burners each comprising: a body having a top surface and an opposing bottom surface, an opening within the body extending from the top surface through the body to the bottom surface, wherein the optical fiber passes through the opening, and one or more gas outlets within the body; and igniting a flammable gas provided by the one or more gas outlets to form a flame encircling the optical fiber passing through the opening, wherein the flame heats the optical fiber by at least 100 degrees Celsius at a heating rate exceeding 10,000 degrees Celsius/second.