7results about How to "Fix unstable performance" patented technology

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 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.

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 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.