Abstract: An open-ear Bluetooth® earphone includes an earphone body and a support frame. The support frame is configured to be plugged into a cavum concha of a wearer. The earphone body is provided with an audio source, and the support frame is installed on the earphone body and corresponds to the audio source. When in use, the support frame is configured to be firmly plugged into the cavum concha of the wearer to allow the earphone body to be worn on the ear of the wearer. The audio source corresponds to the ear canal of the wearer through the support frame, so that the sound emitted from the audio source is transmitted into the ear canal through the support frame. The audio source is directly opposite of the ear canal through the support frame to shorten the distance between the audio source and the ear canal.

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: Disclosed is an open earphone, comprising a sound production component and an ear hook. The ear hook may include a first portion and a second portion connected in sequence. The first portion may be hung between the auricle of a user and the head of the user, the second portion may extend toward a front outer side of the auricle and connect the sound production component, and the sound production component may be located close to the ear canal but not block the opening of the ear canal; wherein the sound production component and the auricle may have a first projection and a second projection on a sagittal plane, respectively, 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 within a range of 0.25-0.

Abstract: A porous biochar for improving heavy pollution and a method for producing the same. Said porous biochar is prepared as follows: arrowhead, which has excellent enrichment of lead, is used to absorb heavy metal lead in polluted water or artificial wetlands, simultaneously absorb heavy metal cadmium, thereafter is dried and treated as a biomass, and then the biomass is calcined in stages with a passivating agent in a high temperature environment, so as to heavy metals such as lead and cadmium be stably coated or enriched in a biochar, which is mixed with Pseudomonas aeruginosa having high resistant, to obtain the porous biochar; the porous biochar has high specific surface area, high porosity and excellent mechanical properties, is very stable under different acid-base environments and oxidizing conditions.

Abstract: The present disclosure provides an earphone comprising a sound production component and an ear hook. In a wearing state, the ear hook is configured to place the sound production component at a position near an ear canal but not blocking the ear canal. An inner contour of the ear hook's projection on a user's sagittal plane includes a first curve having an extremum point in a first direction. The first direction is perpendicular to a long-axis direction of a projection of the sound production component on the sagittal plane. The extremum point is located behind a projection point of an upper vertex of the ear hook on the sagittal plane, and the upper vertex is a highest point of an inner contour of the ear hook along the user's vertical axis. An inclination angle of the long-axis direction relative to a horizontal direction is within a range of 13°-21°.

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 speaker includes a diaphragm, a magnetic circuit component, a coil, and a bracket arranged around the magnetic circuit component. At least part of the coil is arranged in a magnetic gap formed by the magnetic circuit component. The coil drives the diaphragm to vibrate to generate sound after the coil is energized. The diaphragm includes a main-body region and a folded-ring region surround the main-body region. A first part of the bracket is connected to the folded ring region. A thickness of the first part of the bracket is within a range of 0.3 mm-3 mm. The thickness of the first part is a minimum distance between a connection region and an attaching region. The connection region is a region where the bracket and the folded-ring region connect. The attaching region is a region where the bracket directly attaches to the magnetic circuit component in a vibration direction of the diaphragm.

Abstract: The present application discloses a dispatching and control cloud data processing method, device and system. The method includes the following operations: pilot node device acquires a global scheduling task, decomposes the global scheduling task to obtain scheduling tasks, issues the scheduling tasks to collaborative node device, acquires data collection ranges and data processing rules of the collaborative node devices, and delivers them to the collaborative node devices; the collaborative node devices receive and execute the scheduling tasks issued by the pilot node device; receives the data collection ranges and the data processing rules issued by the pilot node device, acquires, based on the scheduling tasks, collected data in the data collection ranges, processes the acquired collected data according to the data processing rules to obtain the processed data, uploads the processed data to the pilot node device; the pilot node device receives the processed data uploaded by the collaborative node devices.

Abstract: Virtual machine management is provided. A virtual machine is started automatically based on a custom resource definition of the virtual machine in response to the receiving the custom resource definition of the virtual machine. A container is generated to run an application workload in the virtual machine based on a container configuration file in response to the virtual machine starting. The application workload is deployed on the container automatically based on a container image corresponding to the container. The application workload is run on the container automatically in accordance with a definition of the application workload.

Abstract: An antenna combination system and a terminal device. The antenna combination system includes a first antenna and a second antenna having a distance less than a first preset threshold. The first antenna includes a first radiation branch and a first feed point, a feed point of the second antenna is arranged on a side away from the first feed point, and a side of the first radiation branch away from the first feed point is grounded. The first feed point is arranged on a side close to the second antenna, and the length of the first radiation branch is an odd multiple of (½)?. In a case that the second antenna transmits a signal in a first frequency band, a first signal and a second signal that cancel each other are coupled from the second antenna to the first antenna.

Abstract: A composite biochar for controlling heavy metal pollution and a process for producing the same, in particular enrichment of heavy metals such as arsenic and lead in soil with centipede grass, thereafter centipede grass is sintered with hydroxyapatite, sepiolite and chitosan, and compounded with microorganisms to produce said composite biochar; through the process of the present invention, heavy metals such as arsenic and lead are stably enriched or coated in said composite biochar, significantly reducing the potential hazard of arsenic and lead to the environment, and also providing new developmental ideas for treating heavy metal biomass.

Abstract: Embodiments of this application disclose a trans-impedance amplifier and a trans-impedance amplifier control method that are used in the field of circuit technologies. A trans-impedance amplifier TIA includes an inverting amplification circuit and a voltage clamping circuit. The inverting amplification circuit is connected in parallel to the voltage clamping circuit. The inverting amplification circuit includes a first PMOS transistor and a first NMOS transistor that have a common gate. A source of the first PMOS transistor is connected to a drain of the first NMOS transistor. The voltage clamping circuit includes a second PMOS transistor and a second NMOS transistor that have a common gate. Gates of the two transistors are connected to an input end of the TIA. A source of the second NMOS transistor and a drain of the second PMOS transistor are connected to an output end of the TIA.

Abstract: An earphone comprises a sound production component and an ear hook including a first portion and a second portion connected in sequence. The first portion is hung between an auricle of a user and a head of the user, and the second portion extends toward a front outer side of the auricle and connects to the sound production component, so that the sound production component is worn at a position near an ear canal but does not block an opening of the ear canal. The sound production component and the auricle have a first projection and a second projection on a sagittal plane, respectively. A first distance between a centroid of the first projection and a highest point of the second projection in a vertical axis direction is within a range of 17 mm-43 mm, and an area of the first projection is within a range of 202 mm2-560 mm2.

Abstract: Embodiments of this application disclose a direct current offset current cancellation circuit and method, and a related device. An optical detection module included in the cancellation circuit in this application is configured to output a current signal. A first amplification module is configured to convert and amplify the current signal into a voltage signal. A first filtering module is configured to filter the voltage signal to obtain a direct current offset voltage. An acceleration module is configured to provide a target voltage for a charging module. The charging module is configured to output a cancellation voltage based on the target voltage and the direct current offset voltage. A direct current cancellation module is configured to cancel a direct current offset current in the current signal based on the cancellation voltage.

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: One or more embodiments of the present disclosure provide a speaker. The speaker may include a diaphragm, a magnetic circuit component, a coil connected to the diaphragm, a bracket arranged around the magnetic circuit component, and a housing. At least part of the coil may be arranged in a magnetic gap formed by the magnetic circuit component, and the coil may drive the diaphragm to vibrate to generate sound after the coil is energized. The diaphragm may include a main-body region and a folded-ring region surround the main-body region. The bracket may be connected to a portion of the folded ring region away from the main-body region, and a plurality of air holes may be provided on the bracket. A pressure relief hole may be provided on the housing. Sound from a back surface of the diaphragm may be transmitted to the pressure relief hole through the plurality of air holes, and the plurality of air holes may at least include a first air hole and a second air hole.

Abstract: An open-ear earphone includes a housing, a chamber is provided inside the housing, a speaker is provided inside the chamber and divides the chamber into a front chamber and a rear chamber. The housing is provided with a first sound hole and a second sound hole. The front chamber is communicated to the outside through the first sound hole, and the rear chamber is communicated to the outside through the second sound hole. The rear chamber includes a first volume down chamber and a second volume down chamber communicated to the first volume down chamber, and the first volume down chamber is located between the speaker and the second volume down chamber. The sound wave in backward motion generated by the speaker is transmitted to the outside from the second sound hole after being reduced by the first volume down chamber and the second volume down chamber.

Abstract: The present disclosure provides an open earphone comprising: a sound production component including a transducer and a housing accommodating the transducer and an ear hook. In a wearing state, a portion of the ear hook is hung between an auricle and a user's head, and the other 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. The housing is provided with a sound outlet on an inner side surface towards the auricle for guiding a sound generated by the transducer out of the housing and to the ear canal, and a ratio of an area of the sound outlet to an area of the inner side surface is between 0.015 and 0.25.

Abstract: Embodiments of the present disclosure provide a sound production component including a diaphragm, a magnetic circuit assembly, a coil, and a housing. The coil is connected to the diaphragm and is at least partially disposed in a magnetic gap formed by the magnetic circuit assembly, and the coil drives the diaphragm to vibrate to produce a sound after being energized. A sound outlet is provided on an inner side surface of the housing for directing a sound generated at a front side of the diaphragm out of the housing. The diaphragm comprises a main body region and a folded ring region surrounding the main body region, the folded ring region comprising an arc-shaped segment and a connection segment connected to the main body region. A projection of a center of the sound outlet along a vibration direction on the diaphragm is on an inner side of the arc-shaped segment.

Abstract: An earphone, including a sound production component; an ear-hook configured to place the sound production component near an ear canal without blocking an opening of the ear canal, at least a portion of the sound production component extends into a concha cavity; and a microphone assembly including a first microphone and a second microphone disposed in the sound production component or the ear hook, the sound production component or the ear hook includes a first sound hole and a second sound hole corresponding to the first microphone and the second microphone, respectively; wherein a projection of the first sound hole on a sagittal plane and a projection of the second sound hole on the sagittal plane have a first distance, a ratio of the first distance to a size of a projection of the sound production component on the sagittal plane along a major axis direction is 0.7-1.2.