Abstract: There is provided an electric traction system 1, comprising: a traction converter module 2 comprising: a positive input terminal 4 and a negative input terminal 6 for operatively coupling to a DC power supply, and a plurality of power inverters 11, each of which comprises positive and negative input nodes 3, 5 configured to receive DC power and output nodes 9 configured to supply AC power, wherein the positive and negative input nodes 3, 5 of the plurality of power inverters 11 are electrically connected in series between the positive input terminal 4 and the negative input terminal 6; and at least one electric motor 8 configured to be driven by the traction converter module 2, the at least one electric motor 8 comprising a multi-phase electric motor 81.

Abstract: There is provided an electric traction system 1, comprising: a step-down transformer 35 comprising a primary winding 36 for operatively coupling to an AC power supply 40 and a secondary winding 37 which is inductively coupled to the primary winding 36; a traction converter module 2 comprising a first input terminal 4 and a second input terminal 6 which are operatively coupled to the secondary winding 37, and a plurality of AC-to-AC power converters 11, each of which comprises first and second input nodes 3, 5 configured to receive AC power and output nodes 9 configured to supply AC power, wherein the first and second input nodes 3, 5 of the plurality of AC-to-AC power converters 11 are electrically connected in series between the first input terminal 4 and the second input terminal 6; and at least one electric motor 25 configured to be driven by the traction converter module 2.

Abstract: The present invention discloses a speech synthesis method and device based on Cauchy denoising probabilistic diffusion models, comprising: (1) calculating a Cauchy noise table for speech synthesis; (2) calculating a Cauchy posterior square scale table for speech synthesis; (3) implementing a Cauchy diffusion process for speech synthesis; (4) calculating the loss function of Cauchy denoising neural network for speech synthesis; (5) implementing the sampling process of Cauchy denoising diffusion models for speech synthesis. The present invention introduces Cauchy noise into the denoising probabilistic diffusion models, achieves model training and sampling, and ultimately completes speech synthesis. The present invention can improve the robustness of the speech synthesis method and significantly enhance the quality of synthesized speech.

Abstract: A control method includes, in response to detecting that an external device is in a target positional relationship with an electronic device, adjusting a working parameter of a supporting assembly of the electronic device, so that the supporting assembly is in a normal working state. In the normal working state, the supporting assembly is able to support the electronic device in different postures.

Abstract: The present invention discloses a node scale-adaptive neuron spike sorting method based on neuromorphic computing, and relates to the field of electroencephalogram signal spike sorting and decoding, the present invention proposes a spiking neural network framework comprising a two-layer spiking neural network and an attention neuron node, by incorporating prior knowledge of spike waveforms, this method automatically guides the addition and removal of network nodes to optimize computational resource allocation according to specific requirements, thereby minimizing hardware resource wastage. This method is characterized by low hardware overhead, high computational speed, and high consistency of results across different datasets. This method enhances the speed of spike sorting processes and shows potential for providing fully automated neuronal classification technology support for wireless implantable brain signal acquisition devices.

Abstract: There is provided an electric traction system, comprising: a step-down transformer comprising a primary winding for operatively coupling to an AC power supply and a secondary winding which is inductively coupled to the primary winding; a traction converter module comprising a first input terminal and a second input terminal which are operatively coupled to the secondary winding, and a plurality of AC-to-AC power converters, each of which comprises first and second input nodes, configured to receive AC power and output nodes configured to supply AC power, wherein the first and second input nodes, of the plurality of AC-to-AC power converters are electrically connected in series between the first input terminal and the second input terminal; and at least one electric motor configured to be driven by the traction converter module.

Abstract: A method for reducing frequency interference, and a communication satellite system. The method includes configuring the communication satellite system, determining a first range of areas in which a spatial isolation angle between the LEO satellite and the GEO satellite does not satisfy a minimum spatial isolation angle within service areas of the movable spot beams, enabling the movable spot beams to not enter the areas, and when the movable spot beams of the transmitting and receiving user antennas of multiple adjacent LEO satellites provide services to a same area, calculating a spatial isolation angles between the movable spot beams of the transmitting and receiving user antennas of any two adjacent LEO satellites, and in response to the spatial isolation angle not satisfying the minimum spatial isolation angle, assigning different sub-frequencies to the movable spot beams that do not satisfy the minimum spatial isolation angle.

Abstract: A lumped power supply circuit for converting an AC signal into a DC signal, the lumped power supply circuit including: a cascaded H-bridge circuit having N H-bridge sub-circuits connected in series between two input terminals of the AC signal, and being configured to convert the AC signal into N first voltage signals, where N is a positive integer greater than or equal to 2; a high-frequency filtering module configured to filter the N first voltage signals, and to generate N second voltage signals; a DC conversion module to receive the N second voltage signals, and to convert the N second voltage signals into at least one third voltage signal; and a lumped power buffer module having an output terminal coupled to a load, and being configured to receive the at least one third voltage signal, and to filter out part of power frequency fluctuations in the third voltage signal.

Abstract: A double-sided sounding device is disclosed. The double-sided sounding device includes an upper vibration system and a lower vibration system. The upper vibration system includes an upper voice coil, and the lower vibration system includes a lower voice coil. The upper voice coil includes a first voice coil and a second voice coil respectively arranged on two opposite sides of the lower voice coil along a direction of a long axis of the double-sided sounding device. The double-sided sounding device reduces the product width, has symmetrical electromagnetic force performances of the upper voice coil and the lower voice coil, and eliminates mutual interferences between the upper voice coil and the lower voice coil when working.

Abstract: The present application discloses an optical imaging lens assembly, comprising an optical lens group and a spacing element group, wherein the optical lens group comprises, in order from an object side to an image plane along an optical axis: a first lens group, comprising a first lens having a refractive power; a second lens group having a positive refractive power, comprising a second lens having a positive refractive power, a third lens having a negative refractive power, a fourth lens having a negative refractive power, a fifth lens having a refractive power and a sixth lens having a positive refractive power; and a third lens group, comprising a seventh lens having a negative refractive power; the spacing element group comprises a fourth spacing element being in contact with an image side surface of the fourth lens and a fifth spacing element being in contact with an image side surface of the fifth lens; an effective focal length F2 of the second lens group and a combined focal length f45 of the fourth le

Abstract: The present disclosure relates to the technical field of electric vehicle engineering, and in particular to an electric drive system, a method, an apparatus, a storage medium, an electronic device, and an electric vehicle. A motor and a converter are provided; the motor is configured to comprise a first winding and a second winding; the converter is configured to comprise a first three-phase bridge and a second three-phase bridge; an input end of the first three-phase bridge is configured to be connected to a power source, and an output end of the first three-phase bridge is configured to be connected to the first winding of the motor; and an input end of the second three-phase bridge is configured to be connected to the power source, and an output end of the second three-phase bridge is configured to be connected to the second winding of the motor.

Abstract: Disclosed in the present invention is a method for decoding Chinese character writing for an invasive brain-computer interface. In a practical application, a corresponding motor neural signal is divided into two states of a writing stroke and a writing stroke break in view of inconsistency of the writing stroke and the writing stroke break during Chinese character writing, and different filters are trained. A hidden markov model (HMM algorithm) and a Viterbi algorithm are used to judge a task state of the motor neural signal, and the corresponding signal is put into a corresponding decoder. The present invention effectively reduces influence of difference of neural data in different states on the decoder, and improves the performance and robustness of the decoder.

Abstract: A polymeric dispersant including a copolymer comprising: a basic moiety; an alkyl group having from about 4 to about 40 carbon atoms; an aromatic group; and a steric hydrophilic group. An aqueous ink jet ink composition including the polymeric dispersant.

Abstract: A self-crosslinked polymeric dispersant including a self-crosslinked polymeric dispersant comprising: a copolymer comprising: an acid group; a base group; a hydrophobic group; and a steric hydrophilic group.

Abstract: The present invention provides a speaker including a first frame, a second frame forming a receiving room with the first frame, a first vibration system, a second vibration system, and a magnetic circuit system. The first vibration system includes a first diaphragm and a first voice coil. The second vibration system includes a second diaphragm and a second voice coil. Winding planes of the first voice coil and the second voice coil are parallel to a vibration direction of the first diaphragm. Taking a center point of the speaker as the center, a structure of the first voice coil is centrosymmetric with the structure of the second voice coil. The speaker of the present invention is narrower in size, the upper and lower amplitudes are synchronized, and the functions are diverse. The two diaphragms can be driven separately to achieve the effect of sensitivity superposition.

Abstract: A multilevel self-balance control circuit can include: a voltage divider unit configured to receive and divide an input voltage; a voltage-controlled charge source load coupled to an output terminal of the voltage divider unit, and being configured to adaptively adjust charge amount input to the voltage-controlled charge source load based on an output voltage of the voltage divider unit, such that a total amount of charges flowing through the voltage-controlled charge source load during a period of each working state of the voltage divider unit is positively correlated with the output voltage of the voltage divider unit, thereby forming a negative feedback loop to achieve voltage balancing of the voltage divider unit; and a control unit configured to generate control signals for the voltage divider unit and the voltage-controlled charge source load, thereby coordinately controlling the voltage divider unit and the voltage-controlled charge source load.

Abstract: Disclosed in the present invention is a method for decoding Chinese character writing for an invasive brain-computer interface. In a practical application, a corresponding motor neural signal is divided into two states of a writing stroke and a writing stroke break in view of inconsistency of the writing stroke and the writing stroke break during Chinese character writing, and different filters are trained. A hidden markov model (HMM algorithm) and a Viterbi algorithm are used to judge a task state of the motor neural signal, and the corresponding signal is put into a corresponding decoder. The present invention effectively reduces influence of difference of neural data in different states on the decoder, and improves the performance and robustness of the decoder.

Abstract: A speaker includes a frame, a vibration system and a magnetic circuit system fixed with the frame, the magnetic circuit system includes a lower clamping plate, a main magnet fixed with an upper surface of the lower clamping plate, an annular secondary magnet surrounding the main magnet for forming a magnetic gap, the lower clamping plate includes a lower surface opposite to the upper surface and a leakage channel recessed from the upper surface to the lower surface but not penetrating the lower surface, the leakage channel connects to the magnetic gap and an outside of the annular secondary magnet. The present invention provides a thinner and more efficient sounding device. The present invention could effectively balance the sound pressure inside and outside the speaker and improve the acoustic performance of the speaker.

Abstract: A cascade circuit can include: N power conversion units connected in series between two ports of a power supply, where N is a positive integer greater than or equal to 2; a controller connected to one of the N power conversion units, and being configured to send a signal to be transmitted through the connected power conversion unit; where each of the power conversion units is configured to send the signal to be transmitted to a next-stage power conversion unit when the each of the power conversion unit shares a reference voltage with the adjacent next-stage power conversion unit; and where the signal to be transmitted is controlled to be transmitted from a previous-stage power conversion unit to a next-stage power conversion unit in sequence until the signal to be transmitted is received by all of the N power conversion units.

Abstract: Fluorescent magenta latexes are provided which may comprise water and fluorescent agent-incorporated resin particles, the particles comprising a resin, Solvent Red 49 as a red fluorescent agent, and Solvent Yellow 98 as a yellow fluorescent agent, wherein the fluorescent magenta latex has a weight ratio of the Solvent Red 49 to the Solvent Yellow 98 in a range of from 3:1 to 10:1. Fluorescent magenta toners and methods of making and using the fluorescent magenta toners are also provided.