15results about How to "Fix unstable performance" patented technology

The invention relates to the technical field of laser amplification, and discloses a high-efficiency dye laser amplification technology, which comprises the following steps of using high repetition frequency ultrafast laser as a pumping source, and carrying out beam expansion and collimation on pumping light through a telescope system; the dye concentration is adjusted in real time through the microfluidic system, and the dye concentration is monitored in real time through the fluorescence detection system; a photonic crystal frequency doubling crystal is used for frequency doubling conversion; pumping light intensity, dye concentration and output power data are collected and subjected to standardization processing; performing data analysis and system parameter optimization through a deep learning model; and the temperature distribution of the laser amplifier is monitored and adjusted in real time by using an intelligent thermal management system. By integrating the high-repetition-frequency ultrafast laser pumping source and the telescope system, uniform beam expansion and collimation of light beams are realized, and the laser amplification efficiency and stability are remarkably improved. Compared with the prior art, the influence of uneven light spots on the amplification effect is effectively reduced, and the quality and consistency of output light beams are ensured.

The invention discloses a graphite ceramic resistor doped with carbon nanotubes, which comprises a graphite ceramic matrix, and the graphite ceramic matrix is internally provided with uniformly dispersed carbon nanotubes. The preparation method of the carbon nanotube-doped graphite ceramic resistor comprises the following steps: S1, preparing raw materials; s2, dispersing the carbon nano tube; s3, mixing and forming; s4, sintering; and S5, post-processing. The carbon nanotubes are doped in the graphite ceramic matrix, so that the electrical conductivity, thermal stability and mechanical strength of the resistor are remarkably improved, the problem that an existing graphite ceramic resistor is unstable in performance in high-temperature, high-pressure and corrosive environments is solved, and the preparation method is simple, low in production cost, suitable for industrial large-scale production and suitable for industrial large-scale production. The cable is suitable for high-temperature, high-pressure and corrosive environments, such as the fields of high-speed rails, subways, rail transit equipment, high-voltage power transmission and transformation and the like.

The utility model relates to the technical field of current transformers, in particular to a three-phase isolation current transformer which comprises a shell and a connecting plate, the outer side of the shell is fixedly connected with the connecting plate through bolts, two sets of partition plates are fixedly connected in the shell at equal intervals, and three sets of current transformers are fixedly installed in the partition plates. An auxiliary assembly is arranged on the outer side of the current transformer, a heat dissipation assembly is arranged in the shell, the auxiliary assembly comprises a connecting ring, a heat conduction pipe and fins, the connecting ring is arranged on the outer side of the current transformer, the heat conduction pipe is arranged on one side of the connecting ring, and the fins are arranged on the outer side of the heat conduction pipe. According to the current transformer, the auxiliary assembly is arranged, the connecting ring, the heat conduction pipe and the fins are used in a matched mode, integrated connection is achieved, copper materials are adopted, the heat dissipation area is enlarged, the heat dissipation effect is good, the problem of unstable performance caused by heat energy generated by a magnetic core and a coil of the current transformer is solved, and the service life of the current transformer is prolonged.

The application provides a speech enhancement method and device based on a hidden space Schrodinger bridge, equipment and a medium. The method comprises the following steps: obtaining degraded speech; encoding the degraded speech into degraded latent variables in a hidden space through a target encoder, the target encoder being used to converge different types of degraded speech to a distribution close to corresponding clean latent variables in the hidden space, and the target encoder having the function of maintaining the energy characteristics of the power spectrum of an audio signal; processing the degraded latent variables through a target generation network based on a Schrodinger bridge to obtain clean latent variables corresponding to the degraded latent variables; and decoding the clean latent variables through a target decoder to obtain clean speech corresponding to the degraded speech. The application can solve the problem that the related art cannot realize the structured reconstruction of missing spectral information in a high-noise and low signal-to-noise ratio environment, and effectively improve the speech enhancement effect.

The application discloses a paper-based and pulp molded product strong water-based structure resin composition for constructing a fiber matrix, a kit and a preparation and application method thereof, and belongs to the technical field of papermaking wet end chemistry and pulp molding materials. In response to the global trend of replacing plastic with paper and fluorine-free control of food contact materials, the application aims at the pain point of failure of traditional chemicals in a high recycling pulp proportion and a closed water circulation high conductivity system, and constructs an acrylic polycarboxylic acid polymer and inorganic-organic dual charge buffer synergistic system. The scheme realizes the multiplication effect of physical strength such as breaking and ring pressure and the water resistance and oil resistance barrier performance by a unique crosslinking mechanism at a very low dosage, which is better than conventional enhancement technology on the market. The composition is a full water-based system and does not contain perfluorinated compounds, which ensures complete pulp recycling while giving the product excellent wet stiffness and film-forming density, and provides a green solution with high efficiency, low cost advantage and compliance for the papermaking and pulp molding industry.

The utility model provides a lubricating oil base oil heating device which is applied to the technical field of lubricating oil processing. The device comprises an outer shell, an inner shell is fixedly installed in the outer shell and is in a hollow cylinder shape, a valve used for discharging lubricating oil is arranged at the bottom end of the inner shell, a first motor is fixedly installed on the back face of the outer shell, the output end of the first motor is connected with a first rotating shaft, and the first rotating shaft rotatably penetrates through the outer shell and the inner shell; a plurality of groups of stirring blades are fixedly mounted on the outer wall in the inner shell, a second motor is fixedly mounted at the side end of the outer shell, the output end of the second motor is connected with a second rotating shaft, the second rotating shaft rotatably penetrates through the outer shell and the inner shell, and a rotating disc is fixedly mounted on the outer wall in the inner shell. In this way, the base oil can be fully stirred, uniform heating is achieved, and the problems that in the prior art, heating is not uniform, the internal temperature difference of the base oil is caused, and the performance of lubricating oil is unstable are solved.

The invention relates to the technical field of motor control, and discloses an LADRC permanent magnet synchronous motor control system and method based on a superspiral sliding mode, and the system comprises a motor control inverter system which is used for receiving a dq-axis stator voltage component, and generating a three-phase current signal of a permanent magnet synchronous motor; the current acquisition subsystem is used for receiving the three-phase current signal and generating a dq-axis stator current component through Clark change and Park conversion; the first speed ring controller is used for designing a self-adaptive bandwidth function and introducing a super-spiral sliding mode algorithm according to the target rotating speed and the actual rotating speed of the motor, and generating a corrected q-axis stator current component by performing error correction on a control system; the second current loop controller is used for performing q-axis PI control to obtain a q-axis stator voltage component; the third current loop controller is used for performing d-axis PI control to obtain a d-axis stator voltage component; according to the invention, buffeting of the control system is effectively reduced, and the anti-interference capability and the control performance of the control system under different working conditions are improved.

The invention belongs to the technical field of foam metal, and particularly relates to a porosity-controllable metal-based composite foam material and a preparation method thereof. The porosity-controllable metal-based composite foam material comprises modified ceramic hollow spheres and a metal matrix, the modified ceramic hollow ball comprises a ceramic hollow ball and a metal coating coated on the ceramic hollow ball. The porosity-controllable metal-based composite foam material has the beneficial effects that the surfaces of the ceramic hollow balls are modified by adopting metal, so that the modified ceramic hollow balls have good compatibility with a metal matrix, and the problem that the performance of the metal-based composite foam material is unstable in the using process is thoroughly solved; the porosity of the obtained metal-based composite foam material can be calculated according to the physical properties of the modified ceramic hollow balls and the metal matrix, that is, the proper metal matrix and modified ceramic hollow balls can be selected according to the required porosity, so that the porosity of the metal-based composite foam material is controllable.

The invention discloses a collagen-based dura mater containing a specific microporous layer and a preparation method thereof. The collagen-based dura mater containing the specific microporous layer comprises a first collagen mater layer, a second collagen mater layer and a third collagen mater layer, wherein the first collagen mater layer is suitable for facing the skull side and at least comprises mineralized collagen materials; the first collagen membrane layer is suitable for facing the brain tissue side and at least comprises a second collagen membrane layer compounded by collagen and other materials; the microporous layer is located between the first collagen membrane layer and the second collagen membrane layer and at least comprises collagen, and the range of the pore diameter and the porosity of the microporous layer meets the requirements that the microporous layer is suitable for supporting growth and migration of meningeal cells, is also suitable for preventing leakage of cerebrospinal fluid and invasion of fibroblasts, and is also suitable for ensuring a continuous phase of mechanical support; the pore diameter of the microporous layer is 5-20 [mu] m, the porosity is 60-80%, and the thickness is 20-120 [mu] m. According to the technical scheme, a three-layer composite bionic structure is constructed by introducing the microporous layer with specific pore diameter and porosity between the two collagen membrane layers, so that cross-scale collaborative optimization of mechanical support, biological activity and anti-leakage performance of the dura mater repair material is realized.

The invention relates to the technical field of electronic component surface treatment, and discloses a connection terminal scratch-resistant coating and an electroplating method thereof.The coating is formed by compounding a metal substrate and nanoscale hard particles distributed in the metal substrate, and the nanoscale hard particles are combined with the metal substrate through an interface chemical reaction. The nanoscale hard particles comprise one or more of silicon carbide, boron nitride and zirconium oxide, and the mass percent of the nanoscale hard particles is 1-5%. By adopting the technical scheme that the metal substrate and the nanoscale hard particles are compounded to form the plating layer, the nanoparticles and the metal substrate form chemical bonding through an interface chemical reaction, and the technical effect of remarkably improving the hardness (microhardness HV is greater than 1000) and the scratch resistance of the plating layer is achieved. Compared with the problem that particles are easy to fall off or the wear resistance is insufficient only through a physical embedding or single metal coating technology in the prior art, the defects that the coating is low in adhesive force and short in service life are overcome through a chemical bonding mechanism.

This utility model relates to the field of vacuum coating technology, and more particularly to an intelligent controllable gas filling device for a vacuum coating machine. The utility model provides an intelligent controllable gas filling device for a vacuum coating machine, including a housing, a chamber door, placement racks, coating components, a fixing pipe, and connecting pipes. The chamber door is rotatably connected to the housing. Multiple placement racks are evenly spaced inside the housing. Coating components are symmetrically installed on the left and right sides of the housing. A fixing pipe is installed on the left side of the housing, and connecting pipes are symmetrically connected to the bottom of the fixing pipe. This device, through the use of a spiral plate and impeller structure, allows multiple gases to undergo multiple mixing processes before entering the vacuum chamber, significantly improving the uniformity of gas mixing and effectively solving the problem of unstable coating performance caused by uneven gas mixing in traditional gas filling devices.

The invention discloses a steel scrap metal material hydraulic packaging equipment control system and method, and particularly relates to the technical field of equipment control. Hydraulic oil pollution data and pressure change data are collected in real time and analyzed, a hydraulic system pressure output comprehensive stability value is generated, a pressure output state is divided into a stability output state and an instability output state according to the comprehensive stability value, and compression force and running speed are dynamically adjusted through trend analysis, so that the stability of the hydraulic system pressure output is improved. Therefore, the operation parameters of the hydraulic system are optimized; under an unstable output state, the influence of a large-load task on the system is reduced by redistributing a compression task and preferentially processing a small-size metal piece, so that the problems of aggravated wear, reduced operation efficiency, equipment damage and the like caused by pollution and unstable pressure in the existing hydraulic system are effectively solved; and the stability and the control precision of a hydraulic system and the overall safety of equipment are remarkably improved.

The present invention discloses a structure and method for improving the assembly accuracy of a free space isolator in an optical module, which comprises a mounting seat and an optical fiber array connected to the mounting seat, wherein each optical fiber of the optical fiber array is connected to an optical fiber connector socket at one end and a metal part at the other end, a magnetic ring is coaxially embedded at the end of the metal part, a Faraday rotation isolator is arranged in the magnetic ring, and an ejector assembly is also arranged on the mounting seat, wherein the ejector assembly is coaxially arranged with the optical fiber in a one-to-one mapping manner, and each ejector assembly comprises an ejector sleeve connected to the mounting seat, wherein a spring is arranged in the ejector sleeve, and an ejector is coaxially plugged into the open end of the ejector sleeve, wherein the spring contacts the ejector, and the ejector contacts the magnetic ring. The present invention ensures the concentricity of the isolator after curing.

The invention provides a water conservancy project maintenance quota material unit price calculation method, and relates to the technical field of water conservancy maintenance cost calculation, engineering function attributes and market maturity of materials are quantified into comprehensive field regulatory factors, contribution degree thresholds are dynamically set for different material types according to the comprehensive field regulatory factors, key features are screened out, and the value of the key features is calculated. The method comprises the following steps: constructing an optimization model taking minimization of prediction errors and maximization of time sequence extrapolation stability as double objectives, performing automatic optimization on random forest hyper-parameters by using a particle swarm algorithm to obtain a combined prediction model, training and evaluating the model through forward chain type time sequence cross validation to ensure that the model meets stability and precision requirements, and performing prediction on the random forest hyper-parameters. And finally, predicting unit prices in multiple periods in the future and prediction intervals thereof by adopting a rolling window mechanism based on the model, and performing dynamic weighted synthesis by applying dual weights fusing time decay and interval width inverse ratio to generate an optimal quota unit price fitting a high-confidence market trend.

The invention belongs to the field of functional polymer composite materials, and relates to an anti-aging heat-insulating sole material and a preparation method thereof. The material is prepared from the following components in parts by mass: polyurethane resin, modified polyvinyl alcohol resin, silicon dioxide, superfine calcium carbonate powder, zinc oxide, a chemical foaming agent, a pore opening regulating agent, a nitrogen and phosphorus-containing flame retardant, an antioxidant, a silane coupling agent and a cross-linking agent. A microporous heat insulation structure is constructed through a multi-phase synergistic foaming system, the interface bonding strength is improved by combining a silane coupling and filler modification technology, and the mechanical property is optimized by controlling the crosslinking density. The preparation method comprises the following steps: premixing, banburying, adding the coupling agent through open milling, standing for stabilization, extruding and granulating, and performing hot-pressing vulcanization molding. The prepared material has the advantages of low thermal conductivity, high rebound resilience, excellent compression deformation recovery capability and anti-aging stability, and is suitable for application scenes of outdoor cold-proof shoes, safety shoes and long-time high-frequency use of sole structures.