20results about How to "Stable characteristics" patented technology

The invention relates to the technical field of bacterial cellulose preparation, in particular to a composite flora for producing bacterial cellulose and a preparation method thereof, and the preparation method comprises the following steps: screening gluconobacter oxydans, obtaining culture medium preparation materials and preparation tools, preparing a slant culture medium set, preparing an enriched liquid culture medium set, and preparing composite flora mixed inoculation liquid. The method comprises the following steps: preparing a waste tobacco leaf leaching solution, extracting a proportional leaching solution from the waste tobacco leaf leaching solution according to a preset proportion, obtaining a mixed fermentation culture medium based on a preparation tool and the proportional leaching solution, and carrying out inoculation operation on a composite flora mixed inoculation solution by using the mixed fermentation culture medium to obtain a dry cellulose membrane; calculating the yield of the bacterial cellulose based on the dry cellulose membrane, and completing the preparation of the composite flora for producing the bacterial cellulose based on the yield of the bacterial cellulose. The method can be used for scientifically, efficiently and stably preparing the composite flora.

This invention relates to a method for extracting natural gas hydrates and the perfluorocarbon extractant used therein. The perfluorocarbon extractant comprises a viscosity modifier, an interface modifier, and a solvent; the viscosity modifier includes perfluorotributylamine; and the interface modifier includes perfluoropolyether and / or perfluorobutyric acid. The perfluorocarbon extractant of this invention exhibits high solubility for methane, strong hydrophobic properties, and stable physicochemical properties. During natural gas hydrate extraction, it allows methane released after hydrate decomposition to preferentially enter the extractant phase in a dissolved state and migrate within the reservoir, thereby achieving single-phase liquid extraction of methane. This technical approach can weaken or even eliminate the Jamin effect and seepage blockage caused by gas-liquid two-phase mixing, reduce reservoir flow resistance, and improve the extraction efficiency and continuous gas production capacity of natural gas hydrates in silty clay reservoirs.

This invention provides a method for detecting rotating debris in coal flow based on physical fuzzy modeling and scene-customized attention. The method includes: acquiring a clear coal flow image and then labeling non-coal debris targets in the image; establishing a dataset; constructing a debris detection network; constructing a physics-driven motion fuzzy mapping model; using the motion fuzzy mapping model to dynamically blur the clear coal flow image, generating training samples simulating motion fuzziness phenomena in a conveyor belt; training and optimizing the debris detection network; inputting a real-time coal flow image into the optimized network to obtain candidate detection results for non-coal debris targets; post-processing the candidate detection results and outputting the final filtered detection results. This invention can improve the stability and accuracy of debris detection under complex conditions of high-speed coal flow, reduce the influence of motion fuzziness and background interference, and provide technical support for the safety monitoring and automatic sorting of coal mine conveying systems.

The invention belongs to the technical field of high-power microwaves, and particularly relates to an ultra-high-power ultra-large-radius coaxial backward wave tube which is particularly suitable for national defense and military application. According to the ultra-large-radius coaxial corrugated backward wave tube, on the basis that the difference between the inner radius and the outer radius of a fundamental wave (TEM wave) is not changed, by increasing the center radius of a slow wave device and keeping the electron beam voltage and current density unchanged, the input current is increased in an equal proportion mode, and the output power is increased in a year-on-year mode. The problem that the power of an existing slow-wave device is limited can be solved.

This invention discloses a method and system for risk assessment and graded early warning of offshore wind farm vessels. The method involves collecting and fusing multi-source sensing data; performing spatiotemporal alignment and fusion processing on the fused multi-source sensing data to generate a bird's-eye view feature representation containing spatiotemporal characteristic information of the vessel; based on the bird's-eye view feature representation, employing a fusion prediction model combining a vessel motion physics model and a time series prediction algorithm, calculating the motion reachability set of the target vessel within the predicted time period; conducting a risk assessment based on the spatial relationship between the motion reachability set and a preset safe area of ​​the wind farm, and triggering graded early warnings based on the assessment results. This invention solves the problems of blind spots in single-source monitoring and high false alarm rates in traditional early warning systems, achieving accurate and dynamic assessment and proactive early warning of vessel collision risks in offshore wind farm waters, significantly improving regulatory safety and efficiency.

The invention relates to the technical field of pet food processing, and particularly provides a protein-lipid compound oil gel coating composition which comprises the following components in parts by weight: 60-70 parts of egg yolk oil; 10 to 20 parts of eggshell membrane peptide; 5-10 parts of medium-chain fatty acid; 0.1 to 0.5 part of vitamin E; 10 to 15 parts of ethyl cellulose; and 2-5 parts of nano silicon dioxide. Egg oil is used as a substrate, an oil gel three-dimensional network is constructed, eggshell membrane protein is integrated into lipid, and precise function delivery of joint and fur health is achieved. The solid coating is stable in structure and high in oxidation resistance, can be firmly attached to the surface of the pet food, effectively prevents grease oxidation and leakage, and remarkably prolongs the shelf life and improves the additional value of the product.

This invention relates to the fields of audio signal processing and machine learning, and particularly to an audio anomaly detection method based on physical perception iterative coding. The method includes a feature extraction and fusion module, a physical perception iterative decoupling network module, and an anomaly scoring module. Based on a physical perception iterative coding mechanism, this invention simulates the human auditory system's perception of sound, decoupling audio features into physical components such as timbre and energy. Through multiple iterations, feature representations are progressively refined, thereby achieving more accurate detection of audio anomalies, especially maintaining stable detection performance in domain-transfer scenarios. Furthermore, this method does not rely on anomalous samples; training can be completed using only normal samples, making it more suitable for practical industrial applications.

The invention discloses a lithium-loving porous interface functional layer as well as a preparation method and application thereof. The preparation method comprises the following steps: dissolving a binder in a non-polar solvent to form a solution A; adding a lithium-loving porous framework material and an electronic conductor into the solution A through a water bath synthesis method, and stirring and reacting to form a solution B; adding a small amount of ionic conductor into the solution B for multiple times to form a solution C; and coating a current collector with the solution C, and drying to form the lithium-loving porous interface functional layer on the current collector. The invention also discloses a lithium-loving porous interface functional layer prepared by the preparation method, and a lithium negative electrode containing the functional layer. The lithium-loving porous interface functional layer comprises the lithium-loving framework, the hole wall of the lithium-loving framework comprises the electronic conductor, and the hole internally comprises the ionic conductor, so that the infinite volume expansion of lithium can be limited, the lithium ion flow is homogenized, the effective current density on the surface is reduced, and the growth of lithium dendrites is inhibited; and the high-capacity and long-cycle performance of the all-solid-state lithium metal battery is realized.

The present application belongs to the field of structural optimization design and vibration control technology, and relates to a bistable quasi-zero stiffness structure reverse topology optimization method based on a double-layer hybrid intelligent algorithm. The method defines material distribution variables within a preset design domain, approximates the optimization target in the form of a target potential energy function, and constructs a multi-objective topology optimization model containing a potential energy deviation term, a volume fraction constraint term and a density gradient penalty term. The outer particle swarm algorithm is used for global search, and the inner gradient descent algorithm is used for local fine convergence, thereby realizing the cooperation of global and local optimization. The method can automatically generate a topology configuration with bistable and quasi-zero stiffness characteristics without explicit geometric assumptions, realize the customized design of structural mechanical properties, and has wide application value for low-frequency vibration isolation, energy absorption and multi-stable mechanism design.

Embodiments of the present application generally relate to semiconductor devices. According to embodiments, a semiconductor device includes a first electrode, a second electrode, and a semiconductor component disposed between the first electrode and the second electrode. The semiconductor component includes a diode region including a first region and a second region, and a transistor region. The first region and the second region extend along a first direction. A first location in a second direction of the first region is different from a second location in the second direction of the second region. The second direction intersects the first direction. The semiconductor component is between the first electrode and the second electrode in a third direction intersecting a plane including the first direction and the second direction. At least a portion of the transistor region is around the diode region in the plane.

The invention relates to the technical field of cosmetics and functional biological materials, in particular to a fish collagen peptide with moisturizing and anti-aging functions and a preparation method thereof, and the fish collagen peptide comprises modified fish collagen peptide, 2-hydroxyethyl formate, glycerol, butanediol, potassium sorbate and triethanolamine. According to the modified fish collagen peptide, fish collagen peptide, gallic acid and acetaldehyde are subjected to polyphenol-aldehyde condensation to form a stable outer shell layer, so that the oxidation resistance and the structural stability are remarkably enhanced; after being cooperated with small-molecule 2-hydroxyethyl formate which is not used in the field, a compact hydrated network can be constructed, the moisture retention rate and the free radical scavenging rate are improved, and low viscosity fluctuation and no layering are kept under the acceleration condition. The preparation method is mild in preparation process and suitable for moisturizing and repairing cosmetics.

The invention relates to the technical field of building information, in particular to a building curtain wall construction error monitoring method and system based on image processing. The method comprises the steps of obtaining an image of a building curtain wall unit plate in a construction site, and obtaining a reference image obtained based on a building information model; candidate key points are extracted from the image; calculating the structural attachment degree of each candidate key point, and carrying out the feature matching of the image and the reference image through employing an improved random sampling consistency algorithm, and obtaining a matching point pair; and determining an actual pose of the unit plate based on the matching point pair, and comparing the actual pose with a design pose in a building information model to obtain a construction error. According to the scheme, error monitoring can be stably and reliably carried out on low-texture and repetitive-texture surfaces.

This invention discloses a method, system, and readable storage medium for nonlinear simulation of remote sensing images. The method includes: inputting a panchromatic image and a multispectral band image; registering the multispectral image with the panchromatic image and resampling it according to high spatial resolution bands; statistically analyzing the mean, root mean square error, and correlation coefficient matrix of the panchromatic and multispectral images; constructing an intermediate band I using the low-resolution multispectral image; constructing an image simulation operator using histogram feature matching of the remote sensing images; and calculating the feature fusion coefficient k. E and feature extraction coefficient k I The method of this invention determines the image simulation scheme and performs image simulation band by band. There is no limitation on the number of image bands, and the simulation results of remote sensing images can be predicted. This invention provides two image simulation modes: panchromatic image injection into multispectral image and multispectral image injection into panchromatic image, enabling high-fidelity simulation of the spectral and spatial information of ground features in remote sensing images.

The utility model belongs to gas density measurement technical field, especially relates to a kind of anti-explosion gas density gauge. Including: pressure sensing chamber, it is laid in the outside of the shell, and with the inner chamber of the shell is communicated;Pressure sensing diaphragm, its edge end is fixedly sealed with the inner wall of the pressure sensing chamber, axial end bottom is equipped with mandrel, the mandrel is slidably inserted in shaft hole and extends to the lead-through chamber of outside, wherein the shaft hole is opened in the bottom of the pressure sensing chamber, the lead-through chamber is laid in the bottom of the pressure sensing chamber;Spring, it is sleeved on the mandrel, and the upper end of the spring is connected with the pressure sensing chamber, lower end is connected with lead-through plate, the lead-through plate is connected with the lower end of the mandrel, the inner chamber bottom of the lead-through chamber still includes the touch switch of setting. The utility model is pushed by pressure sensing diaphragm and makes lead-through plate and touch switch touch, so that its pressure relief valve opens to carry out timely pressure relief, reach the function of self pressure relief explosion-proof.

This invention discloses a method for preparing a wear-resistant, superhydrophobic, radiation-cooling coating based on reactive blending phase separation. First, hydrophobic fumed silica is modified using a silane coupling agent. Then, epoxy resin and fluorosilicone resin are blended in an organic solvent, and modified silica is added to the blend. The mixture is then ultrasonically dispersed in an ice bath to obtain a uniform dispersion. A non-solvent is added dropwise to the dispersion to induce phase separation in the resin system. Next, a curing agent that reacts with the epoxy resin and a silane crosslinking agent or condensation catalyst that reacts with the fluorosilicone resin are sequentially added to the phase-separated system to obtain a composite sol. The composite sol is coated onto a substrate surface and cured by stepwise temperature increases to finally obtain the target coating. This method achieves a synergistic improvement in the coating's high radiation-cooling performance, high hydrophobicity, and high mechanical wear resistance by constructing a reactive epoxy-fluorosilicone interpenetrating polymer matrix and using chemically bonded modified silica at the interface.

This invention belongs to the field of communication engineering technology, specifically an ultra-wideband multi-segment composite disc-cone antenna, comprising a radiator assembly, a feed assembly, an impedance matching assembly, and a grounding assembly. The radiator adopts a multi-segment composite structure, with a continuous copper plate conical surface in the low-frequency region and a radial spoke array in the high-frequency region, combined with a multi-layer coaxial disk and an electrically loaded structure. The feed end integrates a stepped impedance transformer and an LC composite matching network, and is equipped with a choke slot to suppress common-mode current. A wide grounding plane is configured at the bottom. By utilizing the segmented tapered surface and spoke array composite structure, the low-frequency continuous current path and the high-frequency discrete current path are separated on the same radiator, avoiding mutual interference between high- and low-frequency electromagnetic behaviors.

This invention proposes a method and system for intersection recognition based on multiple features of crowdsourced trajectory data, relating to the technical field of intersection recognition. The method includes: collecting crowdsourced vehicle trajectory data covering a target road area to obtain trajectory vector data; cropping the trajectory vector data to retain the target trajectory vector data; spatially rasterizing the target study area, mapping trajectory points to two-dimensional raster cells to construct multi-channel trajectory feature raster data; spatially aligning and overlaying multiple sets of multi-channel trajectory feature raster data; selecting multiple sample collection areas from the obtained unified multi-channel trajectory feature raster data; labeling the intersections within each sample collection area to form a sample dataset; and supervising the training of an intersection recognition model based on the sample dataset to obtain intersection recognition results and performance evaluation metrics. This application helps improve the accuracy and stability of intersection recognition.

The invention discloses a two-dimensional antiferromagnetic material and a preparation method and application thereof, and the method comprises the following steps: adopting Mn and Te elementary substance powder, taking I2 as a transportation agent, and synthesizing a blocky MnTe precursor through a vacuum chemical vapor transport method under a vacuum sealing condition; the preparation method comprises the following steps: mixing a ground MnTe precursor with In elementary substance powder and fluxing agent KCl powder, carrying out fluxing reaction in a vertical confinement space constrained by a constant normal pressure and in an inert atmosphere, and inducing the crystal to epitaxially grow along the horizontal direction, thereby forming a two-dimensional Mn (InTe2) 2 crystal on a fluorine crystal mica substrate, and carrying out wet transfer to obtain the two-dimensional Mn (InTe2) 2 crystal on a SiO2 / Si substrate, according to the method, the two-dimensional Mn (InTe2) 2 crystal with the antiferromagnetic characteristic is prepared through a step-by-step precursor induction type confinement pressure melting epitaxial method, and the method is simple in process and high in repeatability; the two-dimensional Mn (InTe2) 2 crystal has the characteristics of good crystal quality, large transverse size, controllable layer number and the like, and can be applied to a high-density magnetic storage device.

The application discloses a carbon-based room-temperature superconducting material based on frequency resonance matching and a preparation method thereof. 18 The material is made of a heterogeneous covalent network skeleton composed of three-dimensional porous graphdiyne and C The preparation steps include: using microfluidic technology to programically drop isotopic limited fullerene solution into the skeleton suspension to build component micro-gradual distribution; applying a rotating space electric field in a liquid phase state and using deep ultraviolet light for in-situ crosslinking to solidify the dipole configuration of the polarized molecules; and performing alkali metal localized gas phase intercalation after desolvation. The application realizes resonance matching of the lattice electron transmission frequency and the local polariton vibration frequency through spatial gradient distribution and endogenous chemical stress extrusion, overcomes thermal fluctuation disturbance under normal temperature, and establishes a stable macroscopic quantum coherent state under normal temperature and pressure.

This invention discloses a vancomycin resistance gene multiplex detection system based on real-time fluorescence PCR, aiming to establish a TaqMan probe-based multiplex real-time fluorescence PCR detection method for evaluating five common vancomycin resistance gene subtypes in clinical isolates. vanA、vanB、vanC、vanD and vanM The presence of [a substance] is used to clarify the drug resistance mechanism of the strain and guide precise clinical medication. The detection method established in this invention has superior performance, wherein... vanA and vanM The limit of detection is 10 2 copies / µL, vanB、vanC and vanD 10 3 Copies / µL. No specific amplification was observed in non-target strains, vancomycin-sensitive Enterococcus faecalis, and template-free controls. The coefficients of variation of Ct values ​​for each target strain were <1.0% both intra- and inter-batch. With NGS results as a reference, the overall concordance of this system among 108 clinical isolates was 100.00% (108 / 108).