Abstract: The present application provides a coated separator, a preparation method for coated separator, and a battery. The coated separator includes a base film and a coating layer structure arranged on the base film; the coating layer structure includes multiple material layers and includes one-dimensional nanomaterials and ceramic particles; and an average length of the one-dimensional nanomaterials in each material layer decreases layer by layer in a direction away from the base film.

Abstract: Provided are a coated separator, a preparation method of a coated separator, and a battery, which relates to mixing first nanofibers having similar sizes in a first coating layer and mixing second nanofibers having similar sizes in a second coating layer and setting the first coating layer to be a mixture of large-size first nanofibers and large-particle-diameter first ceramic particles and setting the second coating layer to be a mixture of small-size second nanofibers and small-particle-diameter second ceramic particles.

Abstract: A method for quickly optimizing key mining parameters of an outburst coal seam as provided includes steps of constructing a graphic basic information model of the coal mine, giving coal mine characteristic information, performing mining simulation, constructing a CNN-LSTM predicating model, obtaining changes under different mining conditions, constructing a Lorenz chaotic primer, and the like. The model can be improved with continuous breakthroughs in theory, so that the model has a strong learning ability and can adapt to the constantly changing complex geological environment. The method has very good predictability for the determination of coal seam group parameters, and can efficiently select and output a set of candidate parameters.

Abstract: A method of preparing PAN-based carbon fibers relates to the technical field of materials. The method includes: S1. acrylonitrile, a second monomer and an unsaturated UV-sensitive cross-linking agent are mixed, an initiator is then added and a reaction is performed to obtain a meltable PAN-based copolymer; S2. the meltable PAN-based copolymer and a flow modifier are mixed to obtain a mixture, the mixture is extruded and pelletized, and then melt spinning is performed to obtain nascent fibers, the nascent fibers are stretched and annealed to obtain a PAN-based carbon fiber precursor; S3. ultraviolet irradiation is performed on the PAN-based carbon fiber precursor; S4. the PAN-based carbon fiber precursor after ultraviolet irradiation is pre-oxidized and carbonized to obtain PAN-based carbon fibers.

Abstract: The present invention discloses a wireless telemetry device for collecting wheel-rail force signals, comprising: a wireless telemetry module, a power supply module, a signal transmission module and a controller. The wireless telemetry module is installed on a wheel axle of a train; a power supply output induction module is installed on a bogie of the train; a power supply receiving induction coil is installed on the wheel axle and electrically connected with the wireless telemetry module; a signal receiving induction module is installed on the bogie of the train; a signal output induction coil is installed on the wheel axle; the controller is installed on the bogie of the train; and the controller realizes signal connection with the signal receiving induction module. In the present invention, the wireless telemetry module and the controller can realize non-contact power transmission and signal transmission.

Abstract: A stator structure of a magnetic levitation flux-switching motor includes a stator of a modular structure and a motor housing. A modular stator includes front and rear side winding end heat dissipation modules, modular stator left and right wings, a modular stator permanent magnet, front side magnetic conduction column left and right wings, an inter-front side and inter-rear side magnetic conduction column permanent magnets, insulating layers, a stator winding, and rear side magnetic conduction column right and left wings. The front side and rear side winding end heat dissipation modules are of hollow structures, and are symmetrically provided with a cooling medium inlet and a cooling medium outlet, a cooling medium channel is disposed inside a hollow cavity, one side of the heat dissipation module is a smooth curved surface, and good thermal contact can be achieved between the heat dissipation module and the stator winding and the insulating layer.

Abstract: A device and a method are disclosed for collecting and culturing fish embryos and evaluating combined toxicity of thiamethoxam and tetraconazole. An embryo collection component and an embryo culture component are provided on a base plate. The embryo collection component includes a collection tray detachably connected to a bottom of a culture tube. The embryo culture component includes a cavity plate with a stopper inside and a top plate provided with a culture well. A bottom of the culture well is provided with a leakage hole; and after the top plate is installed into the cavity plate, the stopper occludes the leakage hole. The new device is used to carry out the combined toxicity effect test of thiamethoxam and tetraconazole on zebrafish embryos, which can be used to avoid development of pesticide mixtures that have a good preventive effect but pose increased toxicity risk to the ecological environment.

Abstract: A force-balancing magnetic bearing with an adjustable bias magnetic field for a stator permanent magnet motor is provided. The force-balancing magnetic bearing includes four permanent magnetic poles and four electromagnetic poles, wherein a magnetic field energy of the four permanent magnetic poles is sourced from a stator permanent magnet of the stator permanent magnet motor, each permanent magnetic pole is formed by a left permanent-magnet magnetic bridge, a right permanent-magnet magnetic bridge, a magnetic adjusting section, an electromagnetic pole stator, an electromagnetic pole and permanent magnetic pole isolation plate, a permanent-magnet two-side magnetic pole connection section, a left permanent-magnet magnetic pole and a right permanent-magnet magnetic pole, a magnetic flux of each permanent magnetic pole is adjusted by the magnetic adjusting section, and the four electromagnetic poles are adjusted by currents introduced into electromagnetic pole winding coils.

Abstract: A force-balancing magnetic bearing with an adjustable bias magnetic field for a stator permanent magnet motor is provided. The force-balancing magnetic bearing includes four permanent magnetic poles and four electromagnetic poles, wherein a magnetic field energy of the four permanent magnetic poles is sourced from a stator permanent magnet of the stator permanent magnet motor, each permanent magnetic pole is formed by a left permanent-magnet magnetic bridge, a right permanent-magnet magnetic bridge, a magnetic adjusting section, an electromagnetic pole stator, an electromagnetic pole and permanent magnetic pole isolation plate, a permanent-magnet two-side magnetic pole connection section, a left permanent-magnet magnetic pole and a right permanent-magnet magnetic pole, a magnetic flux of each permanent magnetic pole is adjusted by the magnetic adjusting section, and the four electromagnetic poles are adjusted by currents introduced into electromagnetic pole winding coils.

Abstract: The present invention discloses a magnetic bearing of a stator permanent magnet motor with magnetic pole bypasses and a bias force adjusting method thereof, and belongs to the technical field of power generation, power transformation or power distribution. A typical magnetic field loop formed by permanent magnets extending out of stator sections, radial magnetic conduction bridges, circumferential magnetic conduction bridges, magnetic collecting shoes, radial/axial working air gaps and magnetic conduction blocks of radial/axial magnetic field closed main loops is used for designing the magnetic pole bypasses, so as to achieve the distribution of the magnetic field energy with multiple paths and controllable magnetic field strength of the permanent magnets in the stator permanent magnet motor. The present invention further provides a bias magnetic circuit structure.

Abstract: The present invention discloses a magnetic bearing of a stator permanent magnet motor with magnetic pole bypasses and a bias force adjusting method thereof, and belongs to the technical field of power generation, power transformation or power distribution. A typical magnetic field loop formed by permanent magnets extending out of stator sections, radial magnetic conduction bridges, circumferential magnetic conduction bridges, magnetic collecting shoes, radial/axial working air gaps and magnetic conduction blocks of radial/axial magnetic field closed main loops is used for designing the magnetic pole bypasses, so as to achieve the distribution of the magnetic field energy with multiple paths and controllable magnetic field strength of the permanent magnets in the stator permanent magnet motor. The present invention further provides a bias magnetic circuit structure.

Abstract: An optical fiber array, wherein a preset number of optical fibers (13) are fixed by a substrate (12) and a lid plate (11) each provided with V-grooves, and the distribution of fiber cores of the preset number of optical fibers (13) on a port cross-section of the optical fiber array matches a preset curve, such that light beams transmitted and output through the optical fiber array are not transmitted on the same plane, and correspond to required positions on the preset curve. Accordingly, the optical fiber array meets application requirements of a novel WSS system, and can be widely used in the novel WSS system and in other scenarios having special requirements of light beam positions.

Abstract: A device and a method are disclosed for collecting and culturing fish embryos and evaluating combined toxicity of thiamethoxam and tetraconazole. An embryo collection component and an embryo culture component are provided on a base plate. The embryo collection component includes a collection tray detachably connected to a bottom of a culture tube. The embryo culture component includes a cavity plate with a stopper inside and a top plate provided with a culture well. A bottom of the culture well is provided with a leakage hole; and after the top plate is installed into the cavity plate, the stopper occludes the leakage hole. The new device is used to carry out the combined toxicity effect test of thiamethoxam and tetraconazole on zebrafish embryos, which can be used to avoid development of pesticide mixtures that have a good preventive effect but pose increased toxicity risk to the ecological environment.

Abstract: An optical fiber array, wherein a preset number of optical fibers (13) are fixed by a substrate (12) and a lid plate (11) each provided with V-grooves, and the distribution of fiber cores of the preset number of optical fibers (13) on a port cross-section of the optical fiber array matches a preset curve, such that light beams transmitted and output through the optical fiber array are not transmitted on the same plane, and correspond to required positions on the preset curve. Accordingly, the optical fiber array meets application requirements of a novel WSS system, and can be widely used in the novel WSS system and in other scenarios having special requirements of light beam positions.

Abstract: The present invention provides a perfluorophosphate-based drag-reducing agent for gas pipelines. Raw materials for the perfluorophosphate-based drag-reducing agent for gas pipelines consist of fatty acid(s), pyridine(s), fluorophosphates(s) and haloalkane(s) in a mass ratio of 2:1:1:1 to 2:3:1:2. A method for preparing the perfluorophosphate-based drag-reducing agent for gas pipelines is also provided. The perfluorophosphate-based drag-reducing agent for gas pipelines is non-toxic and environmentally friendly, has a high drag reduction percentage, a long-lasting effect, good stability and solubility, does not affect the inner surface and coatings of natural gas pipelines or gas quality, and is suitable for on-line atomization and injection.

Abstract: The present invention provides a mercaptotriazole-based drag-reducing agent for gas pipelines and its preparation method. The drag-reducing agent is prepared by the following steps: producing 1,3-diaminothiourea from hydrazine hydrate and carbon disulfide in a mass ratio of 3:1 to 4:1 under the action of Catalyst I; producing a dithiocarbohydrazone from the condensation reaction of 1,3-diaminothiourea and an aromatic aldehyde in a mass ratio of 1:1 to 1:1.5; producing a mercaptotriazole compound from the dithiocarbohydrazone and an aromatic ester in a mass ratio of 1:1 to 1:3 under the action of Catalyst II; dissolving the mercaptotriazole compound in acetone, adding phosphoric acid or phosphate(s) thereto, and thoroughly mixing them to obtain the target product. The present invention has simple operation and mild reaction conditions and is suitable for online atomization and injection, and the raw materials thereof are available from direct sources.