11results about How to "Low decay rate" patented technology

The present application relates to the technical field of tethered unmanned aerial vehicle, and discloses an unmanned aerial vehicle energy supply system and method based on optical fiber cable, comprising: an energy supply station arranged on the ground or carried on a mother ship; a light flexible high-energy laser transmission optical cable, the first end of which is optically coupled with the energy supply station; and an unmanned aerial vehicle, which is provided with an optoelectronic conversion unit, the second end of the light flexible high-energy laser transmission optical cable being releasably physically connected with the optoelectronic conversion unit, for receiving a high-energy laser beam transmitted through the light flexible high-energy laser transmission optical cable, and converting the high-energy laser beam into electric energy through the optoelectronic conversion unit to provide all or part of the electric power required for flight and task load; through the laser-electric energy conversion mode based on the light flexible high-energy laser transmission optical cable, the decoupling of the hovering height and the operation radius of the unmanned aerial vehicle is realized, the restriction of the self-weight of the on-board battery on the flight performance is eliminated, and the unmanned aerial vehicle can still maintain stable hovering and long-time hovering in a complex airflow environment.

The invention discloses a hot-coated high-barrier heavy-wrapping roll film and a preparation method thereof. Belongs to the technical field of packaging materials. The roll film sequentially comprises an outer-layer base material film, a middle barrier layer and an inner-layer heat sealing film. The middle barrier layer is formed by drying and curing nano-composite barrier liquid coated on the inner surface of the outer-layer base material film; the nano-composite barrier liquid comprises polyvinyl alcohol, a surface-modified inorganic nano-material dispersion liquid, a polymer emulsion, a cross-linking agent and a wetting agent. After being preheated, the barrier liquid is coated by micro gravure, is dried through three stages of rapid shaping, deep crosslinking and high-temperature densification in sequence, and is finally compounded with an inner-layer heat-sealing film in a solvent-free manner. Through precise coupling of a synergistic effect among specific components and a multi-stage drying process, the roll film has excellent initial oxygen barrier property, water vapor barrier property, excellent stability in a high-temperature and high-humidity environment and high barrier stability after simulating a dynamic mechanical load of heavy packaging and transportation.

This invention relates to the field of computer vision, specifically to a passive domain adaptive target detection method and electronic device based on pseudo-label confidence feedback, comprising the following steps: S1, acquiring a pre-trained source domain model and unlabeled target domain data; S2, constructing a mean-teacher self-training architecture; S3, generating pseudo-labels and calculating confidence feedback signals; S4, implementing an adaptive dynamic mean-teacher update strategy. This invention, by introducing a pseudo-label confidence feedback mechanism, enables the model to have adaptive adjustment capabilities, effectively suppressing the adverse effects of low-quality pseudo-labels on model training; it can dynamically reduce the decay rate in high-quality pseudo-label scenarios, improving cross-domain transfer efficiency and detection accuracy; this invention effectively alleviates the "confirmation bias" problem in passive domain adaptive tasks, significantly improving the model's training stability, noise resistance, and cross-domain target detection performance in the target domain, possessing good application value and promising prospects for promotion.

This utility model provides a small-diameter digital communication transmission cable, comprising: multiple pairs of twisted wires, wherein the twisted wires are arranged on both sides of a "I"-shaped filler and twisted together to form a cable core, and the outer side of the cable core is provided with a wrapping layer, a metal foil and plastic composite layer and an outer sheath from the inside to the outside; it solves the technical problems of traditional cables being unable to achieve small outer diameter, high bandwidth, strong anti-interference, long-distance transmission and high durability, and can optimize the cable core structure to improve anti-interference performance and signal transmission bandwidth while ensuring small outer diameter and high flexibility of the cable, and takes into account electromagnetic protection and mechanical strength through composite shielding design, thereby meeting the requirements of high-speed, long-distance and high-reliability communication.

This utility model discloses an ultra-low temperature radio frequency coaxial cable, comprising an inner conductor, an insulator, an outer conductor, and a sheath arranged sequentially from the inside out. It also includes a superconducting reinforcement layer, a buffer compensation layer, and a vacuum insulation layer. The superconducting reinforcement layer is disposed between the inner conductor and the insulator, and the buffer compensation layer is located between the insulator and the outer conductor. The inner and outer sidewalls of the buffer compensation layer are respectively attached to the outer sidewall of the insulator and the inner sidewall of the outer conductor to absorb the stress caused by the difference in thermal expansion coefficients between the inner and outer conductors under ultra-low temperature conditions. The vacuum insulation layer is fitted onto the outer peripheral wall of the sheath and has an insulating cavity inside. The superconducting reinforcement layer reduces the radio frequency loss of the inner conductor, while utilizing the superconducting Meissner effect to suppress eddy current interference in signal transmission, reducing the signal attenuation rate in the superconducting state, and effectively shielding low-frequency electromagnetic noise. It also absorbs the stress caused by the difference in thermal expansion coefficients between the inner and outer conductors under ultra-low temperature conditions.

The invention relates to a high-performance organic silicon packaging adhesive for a photovoltaic module, the packaging adhesive is an organic high-molecular compound taking a silicon-oxygen bond as a main chain, and a colloidal elastomer is formed after the packaging adhesive is cured; the working temperature range of the packaging adhesive is-55 DEG C to 250 DEG C, the light transmittance of the packaging adhesive in a visible light range is not lower than 92%, and after the packaging adhesive is aged for 1000 hours under the double-85 test conditions of 85 DEG C and 85% relative humidity, the light transmittance retention rate is larger than 95%; the packaging adhesive is prepared from a monomer mixture containing dimethyl dichlorosilane and methyl trichlorosilane through high-temperature reaction, hydrolysis and condensation processes under the action of a composite catalytic system of copper and various high polymer materials, and finally a network polymer with linear and cross-linked structures is formed. The core purpose of the invention is to provide a revolutionary photovoltaic packaging material which is high in light transmittance, extremely stable in chemical property, capable of greatly improving the reliability, the service life and the power generation efficiency of a component, and environment-friendly and recoverable.

This invention belongs to the field of thermal storage materials technology and discloses a high thermal conductivity, low expansion magnesium-based thermal storage alloy, which is composed of the following components by weight percentage: 81.2% WE43 rare earth magnesium alloy, 8% Ti2AlC powder, 6% manganese powder, 4% aluminum powder, and 0.8% boron powder. Using WE43 rare earth magnesium alloy as a stable matrix, and combining Ti2AlC powder with manganese, aluminum, and boron powder, an optimal ratio system of matrix, high thermal conductivity phase, and gradient phase precursor is constructed. This achieves synergy between the thermal conductivity of Ti2AlC and the low expansion of the Mn-Al-B gradient phase, fundamentally solving the problem of the mutual constraint between thermal conductivity and low expansion performance in traditional magnesium-based alloys. The Ti element acts as a bridge to strengthen the bond between the bifunctional phase and the magnesium matrix, preventing functional phase detachment and aggregation. Ti2AlC forms a continuous thermal conductivity path to improve heat transfer efficiency, while the Mn-Al-B gradient phase precisely controls the coefficient of thermal expansion, enabling the alloy to maintain high thermal conductivity, low expansion, and low decay rate over a wide temperature range. Furthermore, its high density and excellent surface quality enhance its structural stability and recyclability.

This invention provides a hydrophobically modified quaternized cellulose adsorbent material, its preparation method, and its applications, belonging to the field of new material preparation technology. Addressing the problems of low removal efficiency and poor adaptability to complex water qualities of existing cellulose-based materials for short-chain perfluorinated and polyfluoroalkyl substances (PFAS), this invention employs a two-step method: cellulose is alkalized in a sodium hydroxide solution and then reacted with glycidyltrimethylammonium chloride to obtain quaternized cellulose; it is then dispersed in water, and hydrophobically modified with fluorinated silane and ethyl silicate, resulting in a bifunctional adsorbent material possessing both quaternary ammonium and perfluorinated hydrophobic groups. This material achieves a removal rate of 83% for short-chain PFAS (PFBA) through a synergistic mechanism of electrostatic adsorption and fluorine-fluorine interaction. Even after five adsorption-desorption cycles, the removal rate remains above 76%, and it exhibits stable performance in complex water bodies with high salinity and high organic loads, making it suitable for the deep purification of wastewater contaminated with PFAS.

The application discloses a kind of AEM electrolytic cell health diagnosis and adaptive pulse control method and system, belong to electrolytic water hydrogen production technical field, collect AEM electrolytic cell voltage, hydrogen leakage, hydrogen purity, alkali concentration multi-source data, construct the feature vector containing dispersion, cluster, pseudo high-frequency impedance, mass transfer, purity leakage, alkali drift multiple characteristics;Rely on feature vector to determine electrolytic cell degradation mode and generate corresponding trigger condition;When working condition meets the condition, under the constraint of parameter window, execute current, fluid, temperature multivariate pulse control;After pulse, reconstruct feature vector, accept control effect by voltage, impedance change, and adjust trigger frequency according to acceptance result, replace control strategy or trigger safety protection.

The invention relates to the technical field of bioinformatics and artificial intelligence medical treatment, and particularly discloses a colorectal cancer prognosis risk assessment method and system based on deep harmony and dynamic assessment. The method comprises the following steps: firstly, acquiring lncRNA expression data and a source tag from a sample to be detected, and then mapping the data to a standardized hidden space in which a batch effect is eliminated by utilizing a pre-trained conditional variational auto-encoder (CVAE) model to generate a feature vector; inputting the vector into a prognostic risk model to obtain a preliminary risk level; according to the method, the initial risk level and the PSI are finally output together, double information of risk classification and result confidence is provided for clinical decision making, the cross-platform generalization ability and prediction consistency of the model are remarkably improved, quantitative reliability evaluation is provided for single prediction, and the clinical practical value is enhanced.

The application belongs to the technical field of fuel cells, and relates to a catalyst for a fuel cell and a preparation method and application thereof. The preparation method of the catalyst comprises the following steps: pre-oxidation treatment is performed on a carbon carrier; under the protection of an inert gas, nitrogen-containing organic matter and the pre-oxidized carbon carrier are subjected to heat treatment at 500-800 DEG C to obtain a nitrogen-doped modified carbon carrier; the nitrogen-doped modified carbon carrier is contacted with a platinum salt solution to adsorb the platinum salt, and solid-liquid separation and drying are performed to obtain a supported powder; and reduction treatment is performed on the supported powder to obtain the catalyst. The catalyst prepared by the application has a mass activity greater than 200 A / g and an ECSA decay rate less than or equal to 40%.