Abstract: The present disclosure relates to the technical field of chemical engineering, and specifically discloses a method for removing oxygenated compounds from a Fischer-Tropsch oil having a high carbon number. A reaction-extraction combined process is used in this method for removing oxygenated compounds from a Fischer-Tropsch oil having a high carbon number, wherein the Fischer-Tropsch oil (C5-C20) is firstly subjected to alkaline washing with an alkaline aqueous solution to convert acidic substances into water-soluble salts. The Fischer-Tropsch oil is subjected to a primary extraction with a carbonate-based extractant to remove alcohols and esters therein, and subsequently subjected to a secondary extraction with propylene carbonate to remove ketones and aldehydes impurities therein, thereby removing oxygenated compounds in the Fischer-Tropsch oil. After extraction, the content of the oxygenated compounds in the Fischer-Tropsch oil may be down to 1-60 ppm, and the yield of oil product may be kept 90% or more.

Abstract: A bone conduction receiver includes a housing, a vibrating plate, a bracket, a magnetic loop assembly, a coil, and a protective cover. The vibrating plate is disposed inside the housing and keeps a distance from an inner bottom of the housing. The protective cover is located on one side of the vibrating plate, facing away from the inner bottom of the housing, and covers the opening of the accommodation room. The bracket is located on the side of the vibrating plate, facing away from the inner bottom of the housing. The magnetic loop assembly is secured in the bracket. One end of the coil is fixed to an inner side of the protective cover, and another end of the coil extends into the bracket and surrounds the magnetic loop assembly.

Abstract: Disclosed are a homogeneous silicon carbide material and an electrode plate and a battery that include the homogeneous silicon carbide material. A negative electrode plate in the battery of the present disclosure includes a homogeneous silicon carbide material. The homogeneous silicon carbide material includes an element Si and an element C. The homogeneous silicon carbide material is a homogeneous material and has a bi-continuous phase structure. The homogeneous silicon carbide material in the present disclosure has better cycling performance and higher specific capacity.

Abstract: The mower fleet management device is configured to control a plurality of mowers to work in collaboration. Each of the mowers includes an on-board communication module and an on-board positioning and navigation module. The mower fleet management device includes: a map loading module configured to acquire a map of a working land parcel; a control terminal communication module configured to wirelessly communicate with the on-board communication modules to acquire status information of the mowers; and a working region assigning module configured to assign a working region to each of the mowers according to the status information and the map. The on-board positioning and navigation module of each of the mowers guides the mower to work in the corresponding working region according to the assigned working region.

Abstract: A loudspeaker using a semiconductor voice coil includes a vibrating assembly and a magnetic force assembly. The magnetic force assembly and the vibrating assembly are arranged at an interval. The vibrating component includes a diaphragm and the semiconductor voice coil. The semiconductor voice coil is arranged on a side of the diaphragm. The magnetic force assembly and the semiconductor voice coil are arranged on the same side of the diaphragm. A magnetic gap is defined in the magnetic force assembly. The semiconductor voice coil is arranged in the magnetic gap. The magnetic field lines in the magnetic gap are perpendicular to the direction of current in the semiconductor voice coil. An electronic device including the loudspeaker is also disclosed.

Abstract: A composition for protecting liver, protecting intestines and enhancing immunity for freshwater fish is disclosed, including the following raw materials in parts by weight: 15˜27 parts of Andrographis herba, 18˜22 parts of Isatidis folium, 10˜15 parts of Polygonum hydropiper, 8˜12 parts of Rheum palmatum L., and 8˜12 parts of Galla chinensis. And the preparation and the application of the composition are disclosed. The composition of the disclosure has the effect of resisting bacteria, scavenge free radicals, clearing heat, detoxifying, preventing and treating enteritis and the like, which can effectively improve the immunity of the freshwater fish and ensure the health of the organism.

Abstract: A speaker includes a speaker body and a diaphragm. The diaphragm is a planar structure. The speaker body includes a positioning structure. The positioning structure has a cavity penetrating front and back sides of the positioning structure. The diaphragm is positioned on the positioning structure. The diaphragm is in the form of a planar structure, instead of a curved or spherical structure. The planar structure of the diaphragm is simplified, so that the manufacturing process of the diaphragm is simpler.

Abstract: The present disclosure provides an integrated flywheel with shared cylinders and a manufacturing method therefor, comprising gear rings and support portions comprising a plurality of bridge portions with a spoke and a cylinder. Between adjacent bridge portions, the first spoke overlaps one end of a cylinder on a next-stage support portion to form a first overlap joint, one end of the first cylinder overlaps an inner side of the first spoke, and the other end of the first cylinder overlaps and is fixed with an outer side of the second spoke to form a second overlap joint. A first gear ring with a greater diameter is fixed at the first overlap joints, and a third gear ring with a less diameter is fixed at the second overlap joints. The integrated flywheel has advantages of low mass, good manufacturability and high production efficiency.

Abstract: A speaker includes a speaker body and a diaphragm. The diaphragm is a planar structure. The speaker body includes a positioning structure. The positioning structure has a cavity penetrating front and back sides of the positioning structure. The diaphragm is positioned on the positioning structure. The diaphragm is in the form of a planar structure, instead of a curved or spherical structure. The planar structure of the diaphragm is simplified, so that the manufacturing process of the diaphragm is simpler.

Abstract: Embodiments relate to a semiconductor structure and a fabrication method thereof. The semiconductor structure includes: a semiconductor substrate; a dielectric layer positioned on the semiconductor substrate; and a gate structure, including a bandgap-tunable material layer. The bandgap-tunable material layer is positioned on the dielectric layer, a Fermi level of the bandgap-tunable material layer shifts to a conduction band when electrons inflow, and the Fermi level of the bandgap-tunable material layer shifts to a valence band when the electrons outflow. The semiconductor structure and the fabrication method thereof can effectively reduce fabrication difficulty of the gate structure.

Abstract: A file transfer display control method and apparatus, and a corresponding terminal are provided. In the method the terminal may generate a floating window to display transfer progress information that indicates a progress of a file transfer executed by a content aggregation application in the electronic device, where the content aggregation application includes a plurality of display interfaces that are switchable, where the content aggregation application includes a plurality of display interfaces that are switchable. Further, the terminal obtains at least one of position information and display form of the floating window and displays the transfer progress information in the floating window based on the at least one of the position information and the display form.

Abstract: A composition for protecting liver, protecting intestines and enhancing immunity for freshwater fish is disclosed, including the following raw materials in parts by weight: 15˜27 parts of Andrographis herba, 18˜22 parts of Isatidis folium, 10˜15 parts of Polygonum hydropiper, 8˜12 parts of Rheum palmatum L., and 8˜12 parts of Galla chinensis. And the preparation and the application of the composition are disclosed. The composition of the disclosure has the effect of resisting bacteria, scavenge free radicals, clearing heat, detoxifying, preventing and treating enteritis and the like, which can effectively improve the immunity of the freshwater fish and ensure the health of the organism.

Abstract: Embodiments provide a transistor structure, a semiconductor structure and a fabrication method thereof. The method for fabricating a transistor structure includes: providing a substrate; forming a channel layer on an upper surface of the substrate, the channel layer including a two-dimensional layered transition metal material layer; forming a source and a drain on two opposite sides of the channel layer, respectively; forming a gate dielectric layer on the upper surface of the substrate, the gate dielectric layer covering the channel layer, the source, and the drain; and forming a gate on an upper surface of the gate dielectric layer, the gate being positioned at least directly above the channel layer.

Abstract: Systems and methods to determine a first map of a first parameter based on first signals acquired by a magnetic resonance imaging system, the first map associating each of a plurality of voxels with a respective value of the first parameter, the first parameter quantifying a first physical characteristic of an object represented by the plurality of voxels, determine a second map of a second parameter based on the first signals, the second map associating each of the plurality of voxels with a respective value of the second parameter, the second parameter quantifying a second physical characteristic of the object, and determine a dark-blood phase-sensitive inversion recovery late gadolinium enhancement image based on the first map of the first parameter and on the second map of the second parameter.

Abstract: A one-piece speaker having a built-in sound cavity includes a holder, a casing, a diaphragm, a voice coil, a washer, a magnet, a U-shaped cup, and a circuit board assembly. The speaker has its built-in sound cavity, so that the assembly is more convenient and flexible. The overall structure is simpler and easy to be produced. The sound cavity is larger, the sound sensitivity is better, and there is no need to distinguish between mid and low sounds. The bandwidth is larger, the response speed is faster, the signal frequency allowed to pass is high, the signal distortion is small, and the sound quality is better.

Abstract: A file transfer display control method and apparatus, and a corresponding terminal are provided. In the method the terminal may generate a floating window to display transfer progress information during a file transfer executed by a content aggregation application in the terminal, where the transfer progress information indicates a progress of the file transfer. The terminal acquires position information of the floating window in a display interface of the content aggregation application. The terminal display the transfer progress information in the floating window based on the position information in the display interface.

Abstract: A one-piece speaker having a built-in sound cavity includes a holder, a casing, a diaphragm, a voice coil, a washer, a magnet, a U-shaped cup, and a circuit board assembly. The speaker has its built-in sound cavity, so that the assembly is more convenient and flexible. The overall structure is simpler and easy to be produced. The sound cavity is larger, the sound sensitivity is better, and there is no need to distinguish between mid and low sounds. The bandwidth is larger, the response speed is faster, the signal frequency allowed to pass is high, the signal distortion is small, and the sound quality is better.

Abstract: A motor oil pump assembly includes: an inner sound insulation enclosure encloses an oil pump component, and the inner sound insulation enclosure and the oil pump component define an inner sound insulation cavity filled with low-pressure oil, the inner sound insulation cavity is in communication with a low-pressure cavity of the oil pump component, and the inner sound insulation enclosure is provided with a sound insulation enclosure cavity; and a pre-tightening buffering component, where the pre-tightening buffering component includes a piston and an elastic member, the piston fits in with the sound insulation enclosure cavity and presses against an upper end cover of the oil pump component, and the elastic member is used to provide a pre-tightening force for tightly pressing the upper end cover, where the sound insulation enclosure cavity is in communication with a high-pressure cavity of the oil pump component.

Abstract: A motor oil pump assembly includes: a motor component; an oil pump component, where the oil pump component is supported on an end cover of the motor component; an inner sound insulation enclosure, where the inner sound insulation enclosure encloses the oil pump component, and the inner sound insulation enclosure and the oil pump component define an inner sound insulation cavity filled with low-pressure oil; and a pre-tightening buffering component, where the pre-tightening buffering component is pressed between an upper end cover of the oil pump component and the inner sound insulation enclosure, and the pre-tightening buffering component is in communication with a high-pressure cavity of the oil pump component.