11results about How to "Strong application potential" patented technology

The invention relates to the technical field of oxygen reduction catalysts, in particular to a transition metal-based triatomic oxygen reduction catalyst and a preparation method and application thereof. The invention relates to a preparation method of a transition metal-based triatomic oxygen reduction catalyst. The preparation method comprises the following steps: dispersing carbon nanotubes in a solvent to obtain a dispersion liquid; adding transition metal acetate, urea and 4, 4 '-dihydroxy [1, 1'-biphenyl]-3, 3 ', 5, 5'-tetracarboxaldehyde into the dispersion liquid, performing ultrasonic treatment to obtain mixed liquid, and then performing heating reaction in an inert atmosphere; and after the reaction is finished, naturally cooling to room temperature, filtering, washing and drying to obtain the transition metal-based triatomic oxygen reduction catalyst. The catalyst designed by the invention not only has an efficient catalytic active site, but also remarkably improves the material transmission efficiency and enhances the utilization rate of a catalytic active center by optimizing the structure of a composite material, so that the synergistic enhancement of the electro-catalytic performance is realized.

The application provides a damping type linear generator, a design method and a damping control method, and belongs to the field of rail transit. The damping type linear generator comprises a superconducting coil, an 8-shaped coil and a damping type current collection coil. The damping type current collection coil is arranged in the superconducting coil shell on both sides of the superconducting motorized magnetic suspension train bogie, is used for collecting the energy of the air gap harmonic magnetic field of the 8-shaped coil, and directly supplies power to the on-board electrical equipment and the battery after rectification and filtering, and generates electricity by using the harmonic magnetic field in the train system. The damping type current collection coil is also used for receiving the stable current injected from the on-board power converter converted from the battery. At this time, the damping type current collection coil simulates the superconducting coil magnetic field to generate additional electromagnetic damping force, so as to reduce the vibration amplitude of the bogie in high-speed operation and improve the stability of the superconducting motorized magnetic suspension train in operation. The application improves the stability of the bogie in the operation of the magnetic suspension train.

The invention discloses a saline-alkali soil corn growth index dynamic monitoring method based on unmanned aerial vehicle multispectral remote sensing, relates to the technical field of unmanned aerial vehicle remote sensing, and aims to realize efficient monitoring of corn growth conditions by synchronously acquiring multispectral images and three-dimensional point cloud data by using an unmanned aerial vehicle remote sensing platform. The method comprises the following steps: acquiring saline-alkali grade and growth period information of a target corn field block, calculating a salinity index and a vegetation index based on a multispectral image, and extracting canopy structure parameters through three-dimensional point cloud data. A corresponding target monitoring model is called from a preset monitoring model library, a corn growth index prediction value is generated in combination with salt and alkali grades and growth period information, and finally a growth condition grading early warning graph based on the prediction value is formed. According to the method, the growth difference of the corn under different saline-alkali soil conditions can be accurately identified, effective decision support is provided for farming intervention, and the method has high practical application value.

This invention relates to a method for preparing Panax notoginseng polysaccharides, as well as the products and applications thereof. The preparation method includes: extracting Panax notoginseng by mixing it with an ethanol-water solution; further extracting the residue; mixing the extract with a flocculant; filtering; collecting the filtrate; mixing the filtrate with ethanol and water; centrifuging; collecting the precipitate; subjecting the precipitate to enzymatic depolymerization treatment; inactivating the enzyme; centrifuging; and collecting the supernatant to obtain the final product. The polysaccharide obtained by the method of this invention has a high content and excellent solubility. Furthermore, this invention reveals that Panax notoginseng polysaccharides can regulate key genes of the skin barrier. Specifically, the Panax notoginseng polysaccharides obtained using the method provided by this invention can regulate multiple skin barrier genes, synergistically enhancing skin barrier function from multiple aspects, and have great potential for application in cosmetics.

This invention discloses Aspergillus terreus Aspergillus terreus Applications for reducing nicotine content. Specifically, these applications include Aspergillus terreus. Aspergillus terreus This invention relates to the method for reducing nicotine content in tobacco raw materials, tobacco waste, or tobacco processing byproducts. The method is characterized by high degradation efficiency, mild conditions, and environmental friendliness, providing a new and effective tool for biologically reducing nicotine content in tobacco leaves. It shows promising application prospects in improving tobacco quality and reducing harmful substances and tar content.

The invention discloses a high-performance cobalt-doped cuprous oxide (Co-CuOx) catalyst as well as a preparation method and application thereof in catalyzing reduction of a nitro aromatic compound. The catalyst has a unique graded microsphere structure, cobalt is doped into a cuprous oxide lattice to form bivalent states of Cu < + > / Cu < 2 + > and Co < 2 + > / Co < 3 + >, and the catalyst is rich in oxygen vacancies, so that the electronic structure and the specific surface area of the catalyst are remarkably optimized. The preparation method comprises the following steps: coprecipitating copper and cobalt salts, reducing by using glucose in an alkaline environment, and carrying out a water bath reaction. The catalyst can efficiently catalyze the reduction reaction of 4-nitrophenol, the apparent rate constant of the catalyst reaches up to 38.4 min <-1 > g <-1 > and is 24 times that of pure cuprous oxide, the stability is excellent, the activity is still kept at 90% or above after the catalyst is repeatedly used for 30 times, and the catalyst shows huge practical application potential.

The invention discloses a metasurface integrated Micro-LED structure with light beam shaping and light extraction enhancing functions, the structure comprises a Micro-LED chip and a single-layer metasurface structure directly integrated on the light emitting surface of the Micro-LED chip, and the metasurface is composed of a plurality of sub-wavelength nano units arranged in a two-dimensional array. Wherein the sizes and the space periods of the nano units are cooperatively designed according to the light-emitting center wavelength of the Micro-LED, the distance from a light-emitting layer in the chip to a light-emitting surface and a preset deflection angle of a light beam, so that phase delay values introduced by the units jointly form a composite two-dimensional phase distribution. According to the phase distribution, firstly, divergent spherical wavefront is reconstructed into collimated wavefront by compensating an optical path difference so as to enhance light extraction, and secondly, a linear phase gradient is superposed so that an optical axis of a whole outgoing beam generates a preset deflection angle. According to the invention, the functions of a complex optical system are integrated on a chip layer, and the integration of efficient collimation, directional emission and light extraction enhancement of light beams is realized.

The invention discloses a meat duck body length character molecular marker as well as an identification primer and application thereof. The molecular marker is a duck No.28 chromosome chr28: 301790 locus, the locus has a T / C allele, and the corresponding genotypes are TT, TC and CC. The invention further provides an allele specific primer combination based on the KASP technology, the allele specific primer combination comprises an FAM primer, a VIC primer and a universal primer, and the specific sequences of the FAM primer, the VIC primer and the universal primer are shown as SEQ ID NO.1-3. According to the method, marker-assisted selection is carried out on 10 commercial lines of Huaifu meat ducks, TT type individuals are preferentially selected and reserved, CC type individuals are eliminated, the semi-submersible length is increased by 3.95 cm, the body weight is increased by 200 g, and the progress rate of breeding generations is increased by 38% or above. The method is simple and convenient to operate, low in cost and high in accuracy, and a molecular tool and a technical support are provided for early-stage precise breeding of body length characters of Huaifu meat ducks and similar strains.

This invention discloses a sensing material, preparation method, detection method, and application for detecting atmospheric carboxylic acids, belonging to the field of environmental functional materials technology. It solves the problems of complex operation and inability to achieve real-time online monitoring in existing methods. The sensing material for detecting atmospheric carboxylic acids is a MOF-802-EDTA-Pt composite film. Its preparation method includes: synthesizing MOF-802 material via a hydrothermal reaction using 1,3,5-benzenetricarboxylic acid (BTC) and aluminum nitrate as raw materials and ethylenediaminetetraacetic acid (Na-EDTA) as a ligand; dispersing MOF-802 in DMF to form a coating solution, and forming a film on a glass substrate using a dip-coating method; subsequently loading platinum nanoparticles, and obtaining the composite sensing film through a solvothermal reaction and vacuum drying. The MOF-802-EDTA-Pt composite film has a porous structure and fluorescence properties, achieving detection through the fluorescence quenching effect of carboxylic acid molecules and the MOF framework. The method of this invention has controllable process, high material stability, and is effective in detecting CO2. 2 NO 2 It maintains excellent selectivity even under conditions where other interfering substances coexist, making it suitable for real-time monitoring of carboxylic acid pollutants in the atmospheric environment.

The invention discloses an electromagnetic wave absorbing coating material and a preparation method and application thereof. The coating material is composed of a component A and a component B, the mass ratio of the component A to the component B is (11: 1)-(11.5: 1), and the component A comprises the following components in parts by weight: 100-120 parts of polyurethane, 220-250 parts of a component A solvent, 220-260 parts of filler, 0.3-0.5 part of a dispersing agent, 0.3-0.5 part of an adhesion promoter and 0.3-0.5 part of a flatting agent; and the component B comprises the following components in parts by weight: 10-12 parts of an aromatic amine curing agent and 38-45 parts of a component B solvent. The electromagnetic wave absorbing coating material has low-temperature flexibility, high-temperature mechanical property and electromagnetic wave absorbing property in a wide temperature range, and can be applied to ships, aircrafts, electronic equipment or base stations and the like.

The invention discloses a multi-scale fiber bragg grating multi-peak demodulation method fusing an attention mechanism. The method comprises the following steps that firstly, normalization, noise filtering, baseline correction and other preprocessing are carried out on an original reflection spectrum; secondly, performing multi-scale feature extraction through continuous wavelet transform, a one-dimensional convolutional neural network and global context analysis; then, screening and enhancing the features by using a dual attention mechanism formed by channel attention and space attention, and fusing the processed multi-scale features; and finally, adaptive peak detection and post-processing are carried out based on the fusion features, and accurate positioning of the central wavelength is realized. According to the method, the problem of demodulation when the optical fiber grating spectrums are overlapped in a traditional method is effectively solved, high-precision demodulation with nearly zero errors can still be achieved especially in a completely-overlapped extreme scene, and the method has high anti-interference performance and high robustness and is suitable for an optical fiber grating sensing network with high density and complex working conditions.