Abstract: A power tool includes a housing having a motor housing portion and a front casing coupled to the motor housing portion. The power tool also includes an electric motor positioned within the motor housing portion, a drive assembly having an output shaft to which a tool element for performing work on a workpiece is attachable, and a powdered metal bushing disposed within the front casing that rotatably supports the output shaft.

Abstract: A drying box for storing solar cell chips includes a box body (1). Within the box body is installed a top cover (2) that is reversibly opened and divides an inner chamber of the box body into a storage chamber (13) at a lower part and a temporary storage chamber (14) at an upper part, and a side wall of the temporary storage chamber is provided with a purge hole (3). The drying box further includes a control cabinet (4) disposed at one end of the box body. The control cabinet is provided with a central controller as well as a purge controller and a drive device (5) electrically connected to the central controller. An inlet end of the purge controller is connected to a gas source and an outlet end is connected to the purge hole through a gas pipe. The drive device is connected to the top cover.

Abstract: Methods, systems, and devices for encoding and decoding are described. To encode a vector, an encoder allocates information bits of the vector to channel instances of a channel that are separated into groups. The groups may vary in size and allocation of the information bits is based on a base sequence of a given length. During decoding, a decoder assigns different bit types to channels instances by dividing a codeword into a plurality of groups and assigning bit types to channel instances of the plurality of groups using the base sequence.

Abstract: A distributed multi-terminal and multi-network supporting system for an Android online game App includes an online game server, an Android online game App distributed video and remote control server, and an Android online game video and remote control mode client. The online game server is configured to store Android online game account information and game information of a user. The Android online game App distributed video and remote control server establishes network communication with the online game server, and the Android online game video and remote control mode client, respectively. The Android online game App distributed video and remote control server includes an enhanced ARM CPU version Android OS, an enhanced multi-instance ARM Linux Docker container, a host server, and an enhanced ARM CPU version Linux. A distributed multi-terminal and multi-network supporting method for an Android online game App based on the distributed multi-terminal and multi-network supporting system is provided.

Abstract: A protection circuit and a printed circuit board (PCB) for a terminal camera includes, in a configuration for coupling with a voice control motor (VCM), a drive circuit, a first circuit, a second circuit, a first protection system, a second protection system, and a third protection system. The first circuit and the second circuit are choke inductors or choke circuits including choke inductors, and are configured to couple to two ends of the VCM. The first protection system, the second protection system, and the third protection system are coupled to other key positions of the circuits. The devices are arranged on a top layer of the PCB, and a plurality of layers of the PCB are configured to route a signal based on design requirements.

Abstract: Embodiments of the disclosure pertain to an optical transmitter and/or receiver comprising an electrical signal generator configured to generate an electrical signal that is unshielded or unshieldable at a predetermined frequency, a filter downstream from the electrical signal generator configured to reduce an amplitude of electromagnetic interference (EMI) at the predetermined frequency below a predetermined maximum value, an interface through which the EMI can pass in the absence of the filter, and an optical component configured to receive the electrical signal or provide an input signal to the electrical signal generator. A method of reducing EMI in an optical transmitter and/or receiver using the electrical signal generator, the filter and the optical component is also disclosed.

Abstract: Systems and methods for navigating a user to a destination are provided. An exemplary indoor navigation method uses a terminal device. The method includes capturing, by the terminal device, image data of an indoor scene, and determining a current position of the user based on the captured image data. The method also includes determining a navigation path and a navigation sign for navigating the user from the current position to the destination, and rendering, by the terminal device, a three-dimensional representation of the indoor scene with the navigation sign placed therein based on the image data and the navigation path. The navigation sign signals the navigation path in the three-dimensional representation. The method further includes displaying, on the terminal device, the three-dimensional representation to the user.

Abstract: The invention discloses a rebar bundling machine, a replaceable gun head and a working method thereof. The replaceable gun head according to the present invention comprises a gun head information identification component provided on the gun head, wherein after mounting the gun head on the rebar bundling machine, the gun head information identification component is connected to a main control unit of the rebar bundling machine, and the main control unit obtains information of the gun head through the gun head information identification component.

Abstract: A three-dimensional memory device includes an alternating stack of insulating layers and electrically conductive layers, rows of memory openings vertically extending through the alternating stack, memory opening fill structures located within a first subset of the rows of memory openings, where each of the memory opening fill structures includes a respective memory film and a respective vertical semiconductor channel extending through an opening at a bottom portion of the respective memory film and contacting a respective underlying semiconductor material portion, and dummy memory opening fill structures located within a second subset of the rows of memory openings that do not belong the first subset, where each of the dummy memory opening fill structures includes a respective dummy memory film and a respective dummy vertical semiconductor channel that is electrically isolated from a respective underlying semiconductor material portion by a bottom portion of the respective dummy memory film.

Abstract: Aspects of the present disclosure relate to techniques for codebook subset restriction (CSR). In some cases, a user equipment (UE) receives, from a network entity, codebook subset restriction (CSR) information. The UE determines, based on the CSR information, a restricted beam set for a plurality of antenna panels, determines precoding matrix indicator (PMI) feedback for the antenna panels subject to restricted beam set, and provides the PMI feedback to the network entity.

Abstract: Certain aspects of the present disclosure generally relate to wireless communication. More particularly, certain aspects of the present disclosure relate to early termination of a downlink channel repetition transmission, early termination of an uplink channel repetition, and/or determination of a plurality of beams for a repetition transmission. Numerous other aspects are provided.

Abstract: Methods, systems, and devices for encoding and decoding are described. To encode a vector, an encoder allocates information bits of the vector to channel instances of a channel that are separated into groups. The groups may vary in size and allocation of the information bits is based on a base sequence of a given length. During decoding, a decoder assigns different bit types to channels instances by dividing a codeword into a plurality of groups and assigning bit types to channel instances of the plurality of groups using the base sequence.

Abstract: A quantitative scoring and optimization method of a drilling and completion loss-control material includes: extracting key performance parameters of drilling and completion loss-control materials in loss-circulation zone, sequencing the key performance parameters according to their importance; performing weight calculation on the key performance parameters of the loss-control material by an analytic hierarchy process; determining scores of the key performance parameters of conventional loss-control materials according to an experimental evaluation table of the performance parameters of the loss-control materials; calculating comprehensive scores of all loss-control materials and performing optimal selection on the loss-control materials according to the comprehensive scores.

Abstract: The present disclosure relates to a thin film transistor and a manufacturing method thereof. The thin film transistor includes a substrate, a first semiconductor layer, a gate dielectric layer, and a gate electrode sequentially stacked on the substrate, the first semiconductor layer has a first portion located in a channel region of the thin film transistor and a second portion in source/drain regions of the thin film transistor and located on both sides of the first portion, the second portion and first sub-portions of the first portion adjacent to the second portion include an amorphous semiconductor material, a second sub-portion of the first portion between the first sub-portions includes a polycrystalline semiconductor material, and a second semiconductor layer located in the source/drain regions and in contact with the second portion, wherein a conductivity of the second semiconductor layer is higher than a conductivity of the amorphous semiconductor material.

Abstract: A quantitative scoring and optimization method of a drilling and completion loss-control material includes: extracting key performance parameters of drilling and completion loss-control materials in loss-circulation zone, sequencing the key performance parameters according to their importance; performing weight calculation on the key performance parameters of the loss-control material by an analytic hierarchy process; determining scores of the key performance parameters of conventional loss-control materials according to an experimental evaluation table of the performance parameters of the loss-control materials; calculating comprehensive scores of all loss-control materials and performing optimal selection on the loss-control materials according to the comprehensive scores.

Abstract: A charging method includes: charging a battery according to a second current value after charging the battery according to a first current value in each of N charging cycles, the second current value being less than the first current value, and N being a positive integer; and charging the battery according to a target cutoff voltage value in the case where a target voltage value is greater than or equal to the target cutoff voltage value at the end of the N charging cycle. The target voltage value is a charging voltage value corresponding to the first current value, and the target cutoff voltage value is a first cutoff voltage value, or the target voltage value is a charging voltage value corresponding to the second current value, the target cutoff voltage value is a second cutoff voltage value.

Abstract: This application describes a crystal of a benzofuran derivative free base and a preparation method. Specifically, this application describes crystal A, crystal B, crystal C, and crystal D of N-((4,6-dimethyl-2-carbonyl-1,2-dihydropyridin-3-yl)methyl)-5-ethyl-6-(ethyl(tetrahydro-2H-pyran)4-yl)amino)-2-(piperidin-1-ylmethyl)benzofuran-4-carboxamide and a preparation method for the crystals. The crystals of the compound of formula (I) have great crystal stability and provides improved uses in clinical treatment.

Abstract: Methods, systems, and devices for wireless communication are described for mutual information based polar code construction. A wireless device may receive a codeword over a wireless channel, the codeword encoded using a polar code. The wireless device may identify a set of bit locations of the polar code corresponding to information bits of an encoded information bit vector. The set of bit locations may be determined based at least in part on a reliability order of the bit locations of the polar code, and the reliability order may be determined based at least in part on a recursive model that includes at least one mutual information transfer function that is applied at each polarization stage of multiple polarization stages of the polar code. The wireless device may decode the received codeword to obtain the information bit vector at the set of bit locations.

Abstract: A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus receives, by a user equipment (UE) during a first subframe, an indication of a dynamic uplink/downlink (UL/DL) subframe configuration. The apparatus determines an uplink hybrid automatic repeat request (HARQ) timing based on an uplink reference subframe configuration and at least one of the dynamic UL/DL subframe configuration or a downlink reference subframe configuration. The apparatus selects an uplink subframe for communication based on the determined uplink HARQ timing.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive or determine information identifying a mapping of one or more codewords with regard to one or more layers, wherein the one or more layers include at least one of: a first set of layers, wherein a fraction of bits associated with each layer, of the first set of layers, is for data associated with the UE, or a second set of layers, wherein all bits associated with each layer, of the second set of layers, are for data associated with the UE; and perform rate matching or decoding based at least in part on the information identifying the mapping. Numerous other aspects are provided.