Abstract: A water quality purification assembly includes a first water port, a second water port, an inner housing, an outer housing, a water filtering unit, and a flow guide member. The water filtering unit is provided in the inner housing; the flow guide member is provided between an outer wall surface of the inner housing and an inner wall surface of the outer housing. A first flow guide channel is defined between the inner housing and the outer housing; the first water port, the first flow guide channel, the inner housing, and the second water port are sequentially communicated. The first flow guide channel guides water in an extending direction of the first flow guide channel; and one of the first water port and the second water port is a water inlet, and the other of the first water port and the second water port is a water outlet.

Abstract: Method for monitoring low-temperature pipeline based on smart gas, including: obtaining gas data and pipeline data of each segment of a gas pipeline and weather data of a position of each segment of the gas pipeline; determining at least one target pipeline; determining icing data of the at least one target pipeline by processing the gas data, the pipeline data, and the weather data of the at least one target pipeline based on an icing prediction model, wherein the icing prediction model is a machine learning model; and generating a thawing instruction based on the icing data, and controlling a natural gas heating device to perform a thawing operation on the at least one target pipeline based on the thawing instruction.

Abstract: Embodiments of the present disclosure provide a headphone including a sound production component and an ear hook. The ear hook includes a first portion and a second portion connected in sequence. The first portion being hooked up between an ear auricle and a head of a user, and the second portion is configured to be hang between an auricle of a user and a head of the user, the second portion extends toward a front outer side of the auricle, connects with the sound production component, and is configured to place the sound production component at a position close to an ear canal without blocking an opening of the ear canal, and at least a portion of the sound production component is inserted into an concha cavity. The sound production component and the first portion of the ear hook clamp the auricle in a wearing state.

Abstract: The disclosure provides a method for assembling and interconnecting FBAR filter and an electronic device. The method includes constructing an equivalent circuit model of an assembled FBAR filter according to a circuit model of a filter chip and the grounding circuit of the FBAR filter; modeling, simulating and calculating the grounding circuit to extract parasitic parameters corresponding to the grounding pad and a grounding bond-wire of the grounding circuit, respectively; feedbacking the parasitic parameters back into the equivalent circuit model, and using the circuit simulation software to obtain an S parameter of the filter; adjusting the parasitic parameters of the grounding circuit to optimize an S parameter performance of the FBAR filter: obtaining an optimal assembly configuration of the FBAR filter to guide the assembly. The parasitic parameters include a parasitic inductance of the grounding bond-wire and a parasitic capacitance and parasitic inductance of the grounding pad.

Abstract: The present disclosure provides an impedance apparatus. The apparatus includes a mass component, at least one elastic component, and a fixed component, the mass component connecting with the fixed component through the at least one elastic component; a damping component disposed between the mass component and the fixed component and providing damping for a movement of the mass component relative to the fixed component. When the mass component is in contact with an external vibration unit, the mass component receives a vibration of the external vibration unit and moves relative to the fixed component, a mass of the mass component is in a range of 0.5 g-5 g, an elastic coefficient of the at least one elastic component is in a range of 600 N/m-5000 N/m, a damping of the damping component is in a range of 1-4, and the impedance apparatus provides the external vibration unit with a mechanical impedance in a range of 6 dB-50 dB.

Abstract: The present application discloses a sound-output device, 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 vibration speaker is coupled to the air-conducted speaker through a mechanical structure; and the bone-conducted sound wave is input to the air-conducted speaker at least in part as an input signal.

Abstract: Embodiments of the present disclosure provide an acoustic output device including: a transducer configured to generate a mechanical vibration based on an electrical signal, the transducer including a magnetic circuit assembly and a vibration transmission sheet; a housing configured to accommodate the transducer, the housing including a panel and a shell, the magnetic circuit assembly being elastically connected to the housing through the vibration transmission sheet, and the transducer transmitting the mechanical vibration to a user through the panel; and an additional element connected to the magnetic circuit assembly. The additional element is elastically connected to the panel through the magnetic circuit assembly.

Abstract: The present invention relates to a phthalate free propylene-ethylene copolymer having high ethylene content characterized by low hexane extractable and xylene soluble properties, while showing excellent mechanical properties. The preparation of the copolymer is carried out in the presence of a phthalate free catalyst system comprising (a) phthalate free catalyst component obtained by contacting a magnesium halide, a titanium compound having at least a Ti-halogen bond and one or more electron donor compounds comprising urea, a carbonate ether, and a 1,3-diether; (b) an alkyl aluminum compound; and (c) an external electron donor compound.

Abstract: A computer-implemented method, according to one approach, includes: receiving a request to add a subset of participants on a group call to a private communication channel. The group call includes a shared communication channel extending between the participants, the shared communication channel being configured to exchange information between the participants. The method further includes evaluating statuses of the participants in the subset. Moreover, in response to determining that the participants in the subset are not already included on a different private communication channel, and that the participants in the subset are not actively being added to a different private communication channel, the subset of participants are added to the private communication channel.

Abstract: Systems and methods for pre-deployment user journey evaluation are described. Embodiments are configured to obtain a user journey including a plurality of touchpoints; generate a simulation agent including a plurality of attributes; generate a probability score for the simulation agent for each of the plurality of touchpoints based on the plurality of attributes using a machine learning model; perform a simulation of the user journey based on the probability score; and generate a text describing the user journey based on the simulation.

Abstract: A preparation method to produce a Ziegler-Natta catalyst for olefin polymerization through treatment of MgCl2.xROH adduct with a transition metal halide in the presence of one or more urea compounds in combination with one or more internal electron donors is provided. The catalyst systems, according to present invention, are able to produce polypropylene polymers with higher stereo-regularity. The catalyst systems, according to present invention, are able to produce polypropylene polymers using a phthalate-free catalyst system, with an isotacticity that is equal to or higher than catalyst systems containing phthalate derivatives.

Abstract: Disclosed are a double-sided solar cell and a preparation method therefor. The double-sided solar cell comprises: a silicon wafer having a PN junction, and a front first silicon oxide layer, a front second silicon oxide layer, a front first nitrogen-containing silicon compound layer, a front second nitrogen-containing silicon compound layer, and a front third silicon oxide layer that are located on one side of an N-type layer of the silicon wafer and are sequentially stacked along a direction away from the silicon wafer; and a passivation layer, a back silicon oxide layer, a back first nitrogen-containing silicon compound layer, and a back second nitrogen-containing silicon compound layer that are located on one side of a P-type layer of the silicon wafer and are sequentially stacked along the direction away from the silicon wafer.

Abstract: A method for controlling an interference torque for a vehicle is provided. The method is applied to a new energy vehicle including an electric motor and an engine, and includes steps of: arbitrating between a pedal torque of a driver and an interference torque required by ESP; performing an initial allocation on the electric motor and/or the engine in response to the pedal torque when the vehicle is in a hybrid drive mode, to meet an engine torque request while ensuring that the engine is operated at an optimal operation point; and determining, based on the initial allocation, whether the motor is capable of fully responding to the arbitrated torque, if so, controlling the motor to respond to the arbitrated torque in priority, otherwise controlling the engine and the motor to cooperatively respond to the arbitrated torque.

Abstract: The present disclosure relates to an open binaural earphone including a housing, at least one low-frequency speaker, and at least one high-frequency speaker. The housing may be placed on at least one of a head or an ear of a user and not blocking a user's ear canal, and configured to accommodate the at least one low-frequency speaker and the at least one high-frequency speaker. The at least one low-frequency speaker may be configured to output sounds within a first frequency range from at least two first sound guiding holes through at least two first guiding tubes. The at least one high-frequency speaker may be configured to output sounds within a second frequency range from at least two second sound guiding holes through at least two second guiding tubes. The second frequency range may include one or more frequencies higher than one or more frequencies in the first frequency range.

Abstract: An industrial internet of things for determining a target automatic guided vehicle (AGV) path, a control method, and a storage medium are provided. The industrial internet of things comprises a service platform, a management platform and a sensor network platform which are connected in sequence. The management platform comprises: an obtaining module configured to obtain an AGV route layout of a target workshop through the sensor network platform, and generate a basic layout directed graph according to the AGV route layout; and a determination module configured to determine, based on the basic layout directed graph, an optimal AGV path through a second iteration approach; generate a target AGV path at least based on the optimal AGV path; and control an AGV to carry out material transportation according to the target AGV path, and send the target AGV path to the user platform for display to a user.

Abstract: The present disclosure relates to a magnetic circuit assembly of a bone conduction speaker. The magnetic circuit assembly may generate a first magnetic field. The magnetic circuit assembly may include a first magnetic element, and the first magnetic element may generate a second magnetic field. The magnetic circuit may further include a first magnetic guide element and at least one second magnetic element. The at least one second magnetic element may be configured to surround the first magnetic element and a magnetic gap may be configured between the second magnetic element and the first magnetic element. A magnetic field strength of the first magnetic field within the magnetic gap may exceed a magnetic field strength of the second magnetic field within the magnetic gap.

Abstract: One or more embodiments of the present disclosure provide an acoustic output device, comprising a housing; a first loudspeaker disposed in the housing, the first loudspeaker being acoustically coupled with a first hole portion and a second hole portion disposed on the housing, respectively, and the first loudspeaker being driven by a first electrical signal to output a first sound wave and a second sound wave having a phase difference through the first hole portion and the second hole portion, respectively; and a second loudspeaker disposed in the housing, the second loudspeaker being driven by a second electrical signal to output a third sound wave. In a target frequency range, the superposition of the first sound wave, the second sound wave, and the third sound wave generates a directional far-field radiation from the acoustic output device.

Abstract: Embodiments of the present disclosure provide an acoustic output device comprising a transducer device configured to generate a mechanical vibration based on an electrical signal, the transducer device including a magnetic circuit assembly and an elastic support component; a housing configured to accommodate the transducer device, wherein the housing includes a panel and a shell, the transducer device transmitting the mechanical vibration to a user through the panel; and an additional element connected to the panel through a vibration path, the vibration path at least including an elastic element, the additional element being located at a sidewall of the shell adjacent to the panel, and the elastic support component connecting the magnetic circuit assembly and the sidewall disposed with the additional element.

Abstract: An acoustic module includes a speaker mesh and a fastener. The speaker mesh includes a first end face and a second end face that are opposite to each other. The first end face is provided with an installation cavity that is recessed to the second end face. The second end face is provided with a plurality of sound holes that are connected to the installation cavity. The first end face is configured to abut against a housing of the electronic device. The fastener is fastened in the installation cavity, and the fastener is configured to be fastened to the electronic device. The acoustic module is of a structure in which the fastener is wrapped by the speaker mesh. The first end face of the speaker mesh abuts against the electronic device, and the fastener is hidden in the installation cavity of the speaker mesh.

Abstract: An acoustic output device comprises a housing, a first loudspeaker and a second loudspeaker disposed in the housing. The first loudspeaker includes a first diaphragm. In the housing, a first front cavity and a first rear cavity are respectively disposed on a front side and a rear side of the first diaphragm, and the first front cavity and the first rear cavity are acoustically coupled with two hole portions disposed on the housing, respectively, to output a first sound wave and a second sound wave. The second loudspeaker includes a second diaphragm. In the housing, a second front cavity and a second rear cavity are respectively disposed on a front side and a rear side of the second diaphragm, and only one of the second front cavity and the second rear cavity is acoustically coupled with a hole portion disposed on the housing to output a third sound wave.