Abstract: A method for suppressing magnetizing inrush current of the transformer with flux linkage control includes connecting a small-capacity direct current/alternating current (DC/AC) converter with the secondary winding or auxiliary winding of transformer, detecting the primary side phase voltage before closing load, inducing the core flux linkage reference according to the relationship between the winding voltage and core flux linkage. The core flux linkage closed-loop PI control system is constructed to control the converter voltage in the synchronous coordinate, then the core flux linkage can track its reference with no static error, thus the sinusoidal flux linkage with 90-degree difference from the grid voltage can be pre-established in the core before no-load closing. By these methods, no matter when the main transformer closes, the core flux linkage is always in the steady state, and the magnetizing inrush current can be eliminated completely.

Abstract: A pulse detonation combustion system includes: an inlet pipe; an intake cone disposed in the inlet pipe, having an end provided with a pneumatic valve, and including an atomizing air transfer tube, a fuel transfer tube, and a conical swirl nozzle connected to the atomizing air transfer tube and the fuel transfer tube; an atomizing air intake tube connected with the atomizing air transfer tube; a fuel supply tube connected with the fuel transfer tube; a pulse detonation combustion chamber located downstream of and communicated to the inlet pipe, and provided with a spark plug mounting seat for mounting a spark plug; a gas energy distribution adjustment device located downstream of and communicated to the pulse detonation combustion chamber; and a transition section located downstream of and communicated to the gas energy distribution adjustment device.

Abstract: Disclosed are modified expanded polystyrene (EPS) particles and a modification method thereof, and concrete containing the modified EPS particles and a preparation method thereof, relating to the technical field of inorganic building materials. The modification method of the EPS particles includes following steps: (1) spraying adhesive materials on surfaces of the EPS particles in a stirring state, and obtaining the EPS particles with the adhesive materials attached to the surfaces; and (2) mixing the EPS particles attached with the adhesive materials with inorganic mixed materials to obtain the modified EPS particles. The preparation method of modified EPS concrete includes: mixing the modified EPS particles with a cementitious material, adding an admixture and water, and uniformly stirring to obtain the modified EPS concrete.

Abstract: A broadband multiple-input multiple-output (MIMO) antenna with self-decoupling characteristics includes: a dielectric substrate, a metal patch printed on an upper surface of the dielectric substrate, and a pair of horizontal back-to-back elliptical tapered slots and a vertical elliptical tapered slot etched on the metal patch. A microstrip line and another bent micro strip line are respectively used to feed the vertical elliptical tapered slot and the pair of horizontal elliptical tapered slots, and characteristic modes of the horizontal slots excited by the bent microstrip line and characteristic modes of the vertical slot excited by the micro strip line are mutually orthogonal. By adopting the technical scheme, no additional decoupling structure needs to be introduced, and lower coupling can be realized in a wider working frequency band.

Abstract: The present disclosure relates to a method and apparatus for sparsification training of a neural network model, a board card, and a readable storage medium. The data processing apparatus of the present disclosure is implemented as a computing apparatus and included in a combined processing apparatus. The combined processing apparatus further includes an interface apparatus and other processing apparatus. The computing apparatus interacts with other processing apparatus to jointly complete a computing operation specified by a user. The combined processing apparatus further includes a storage apparatus. The storage apparatus is connected to the computing apparatus and other processing apparatus, respectively. The storage apparatus is used to store data of the computing apparatus and other processing apparatus.

Abstract: The present invention provides a method for forming a graphene film through horizontally tiling and self-assembling graphene, including: proportionally adding toluene and alcohol into a graphene aqueous solution to be fully and uniformly mixed; then pouring the mixture into a vacuum filtration device, wherein when a solution in a filter flask forms a layered solution system with upper and lower layers, graphene is confined at an interface and tiled horizontally under a shear force at the interface to allow (002) planes of graphene to gradually become parallel to the interface, and graphene to be self-assembled to form the graphene film; and activating the suction filtration device to remove the solution, to obtain a graphene film with the (002) planes parallel to each other at a microscopic level on a filter paper.

Abstract: A polypeptide composition for treating atrial fibrillation includes a polypeptide that has a sequence: fADNYTRLRKQMAVKKYLNSILN-NH2 (SEQ ID NO: 1), From an N-terminus of the polypeptide, a first amino acid (f) is a D-Phe, a second amino acid is Ala, and a third amino acid is Asp; and the peptide is linear in a solution and forms an ?-helix structure after encountering a lipid bilayer.

Abstract: A pre-alarming method, a control method, and a control system for a harmful flow pattern in an oil and gas pipeline-riser system are provided. Support vector machines are trained. Through at least three pressure difference signals on the pipeline-riser system, an overall flow pattern in the pipeline-riser system is continuously and rapidly identified. Depending on monitoring on formation of a long liquid slug in a seabed pipeline and a quick response of the mean value of each pressure difference signal on a flow rate change, pre-alarming for a liquid slug caused by different mechanisms is realized, and liquid slug formation positions respectively of seabed pipeline and riser bottom are correspondingly pre-alarmed; after a pre-alarm is issued, there is enough time for a control device to respond, so as to avoid formation of the harmful flow pattern or damages caused by the harmful flow pattern.

Abstract: The preparation device includes an upper main conveyor belt, and an aggregate box, a first silane emulsion container and a first paper mill sludge container sequentially arranged above the upper main conveyor belt in a conveying direction. A lower auxiliary conveyor belt is arranged below the upper main conveyor belt, and a second paper mill sludge container and a second silane emulsion container are sequentially arranged between the upper main conveyor belt and the lower auxiliary conveyor belt in a conveying direction of the lower auxiliary conveyor belt. A trolley is arranged at the conveying tail end of the lower auxiliary conveyor belt, a gravity sensing device is arranged below the trolley, a mixer is arranged beside the trolley, and a heater is arranged at the bottom of the mixer.

Abstract: The present disclosure provides a computation device. The computation device is configured to perform a machine learning computation, and includes an operation unit, a controller unit, and a conversion unit. The storage unit is configured to obtain input data and a computation instruction. The controller unit is configured to extract and parse the computation instruction from the storage unit to obtain one or more operation instructions, and to send the one or more operation instructions and the input data to the operation unit. The operation unit is configured to perform operations on the input data according to one or more operation instructions to obtain a computation result of the computation instruction. In the examples of the present disclosure, the input data involved in machine learning computations is represented by fixed-point data, thereby improving the processing speed and efficiency of training operations.

Abstract: The disclosure provides a dispersion management method and apparatus based on non-periodic spectral phase jumps. Precise dispersion is provided by virtue of non-periodic spectral phase jumps, the dispersion can be tuned freely with engineering of the phase jump. A device based on non-periodic spectral phase jump also has a wide working bandwidth and could promote the development of ultrafast optics. The method includes: spatially separating a light pulse with different frequency components, and meanwhile, making the light pulse with the different frequency components propagate in parallel; enabling the light pulse with the different frequency components and propagating in parallel to be incident on a non-periodic phase jump device to obtain non-periodic spectral phase jumps, forming a phase grating effect to obtain two ±1-order diffracted pulses having opposite group delays, and introducing frequency dependent relative delay for the different spectral components in the two diffracted pulses.

Abstract: A mineralization agent, including, by weight: 5-50% of a film-forming protein, 5-40% of an amelogenin peptide, 5-30% of a water-soluble phosphate, 4-20% of a tris(2-carboxyethyl) phosphine hydrochloride, and 1-10% of a pH regulator. The film-forming protein is selected from the group consisting of lysozyme, bovine serum protein, insulin, ?-lactalbumin, or a mixture thereof.

Abstract: Disclosed is a transient-state THz spectrometer applied to cells and biological macromolecules, including a femtosecond laser amplifier. A femtosecond laser output by the femtosecond laser amplifier is divided into two beams of pump light and probe light after passing through a beam splitter of which a transmission-reflection ratio is 7:3, the pump light is focused to irradiate a gap between electrodes of a nonlinear photoconductive antenna and emit a terahertz wave after successively passing through a half wave plate, a silver-plated reflector and a first lens, the terahertz wave forms a terahertz wave collineation after successively passing through a second lens, a slab waveguide, a third lens and an ITO film, the terahertz wave collineation and the probe light form a probe light collineation of wavefront tilt which is perpendicularly incident on a ZnTe crystal and detected and recorded by using a CCD camera.

Abstract: A high voltage relay resistant to instantaneous high-current impact is disclosed, and includes an electromagnet system, a control system, a contact system, and a base support. In the present solution, an electromagnetic force generated by the contact system is used to resolve a problem of contact separation caused by an electric repulsion force generated by an instantaneous high-current.

Abstract: An application of a GABAA receptor allosteric enhancer in medicine.

Abstract: The present invention discloses a new submerged buoy data acquisition system, including a battery compartment, a main control processor, a GPS receiver, a gigabit Ethernet interface module, and a plurality of data acquisition boards, where the GPS receiver is connected to the main control processor, and the main control processor is connected to a host computer by using the gigabit Ethernet interface module; the data acquisition board includes a hydrophone sensor, a front-end drive circuit, an AD conversion circuit, a clock module, a DA conversion circuit, an FPGA, an ARM processor, and a storage module; the hydrophone sensor is connected to the AD conversion circuit by using the front-end drive circuit, the AD conversion circuit is connected to the FPGA, the FPGA is connected to the ARM processor, the storage module is connected to the ARM processor, the DA conversion circuit is connected to the FPGA and the clock module, the clock module is connected to the FPGA, and the ARM processor is connected to the ma

Abstract: A silicon carbide-based micro-electro-mechanical system (MEMS) combined temperature-pressure sensor chip and a preparation thereof. The chip includes a peripheric pressure-measuring unit and a center temperature-measuring unit. The pressure-measuring unit includes a silicon carbide substrate with a raised island and a pressure sensitive diaphragm formed by etching the back of the substrate. The raised island and the pressure-sensitive diaphragm constitute a membrane-island structure. Four piezoresistive strips are arranged symmetrically along a circumferential direction of a root of the pressure-sensitive diaphragm and between the raised island and the pressure-sensitive diaphragm. The temperature-measuring unit includes the raised island and a thin-film thermocouple arranged thereon.