119results about How to "Prevent degradation" patented technology

The invention belongs to the technical field of time sequence prediction, and particularly relates to a time sequence prediction method and device based on period embedding and multi-scale features. Preprocessing the historical observation time sequence of the temperature change of the electric transformer to obtain a sub-sequence; periodic modes in the subsequences are extracted, and non-periodic residual features of the subsequences are calculated; decomposing the aperiodic residual features into a low-frequency component and a high-frequency component; calculating weights according to the low-frequency components and the high-frequency components, and carrying out weighted optimization to form multi-scale features; constructing two embedded parameter matrixes, and generating a self-adaptive adjacent matrix; inputting the multi-scale features and the adaptive adjacency matrix into a graph convolutional network, performing residual connection on output features of the graph convolutional network and the multi-scale features, and calculating fused features; generating a predicted value of the time sequence based on the fused features; and correcting the predicted value of the time sequence, and outputting a corrected time sequence prediction result, so as to improve the stability and accuracy of prediction.

The invention discloses a ground-air integrated agricultural detection system and method, and relates to the technical field of agricultural detection. Farmland multi-dimensional data are collected through the ground-air sensor, and the farmland environment is comprehensively monitored. Based on the soil moisture dynamic change and the crop root activity data, obtaining a root moisture utilization efficiency index; identifying crop disease symptoms and pest population distribution, predicting a pest diffusion trend, and obtaining a pest propagation risk index; the soil erosion risk index is obtained by analyzing the soil particle loss, the surface runoff intensity and the vegetation coverage change. The early warning module comprehensively evaluates the root system moisture utilization efficiency index, the disease and pest propagation risk index and the soil erosion risk index to obtain a farmland detection index, an early warning mechanism is set, and early warning information is generated when the farmland detection index triggers an early warning condition. Farmland conditions can be monitored in real time, a scientific management basis is provided, the intelligent level of agricultural management is improved, and resource waste and crop loss are reduced.

The invention relates to the technical field of batteries, in particular to a positive electrode material and a preparation method and application thereof. The positive electrode material comprises a core layer and a shell layer coating the surface of the core layer, the core layer comprises a high-nickel multi-metal oxide and a doping element Q, and the Q comprises at least one of Al, B, Nb, La, Sr, Sb and Mo; the shell layer comprises a nickel-containing multi-metal oxide and a doping element M, the element M comprises the element Q and a doping element D, and the doping element D is selected from at least one of B, Sb, Nb, W, Zr, Ta and Mo; the element Q is different from the element D; the element Q is uniformly distributed in the core layer and the shell layer; the doping element D is distributed in a radial concentration decreasing manner from the surface to the interior of the shell layer, and the interior of the positive electrode material is of a radial structure. The positive electrode material provided by the invention has low 003 crystal face grain size and high microstrain, can realize structure optimization and core-shell concentration difference maintenance at the same time, and improves the electrochemical performance of the positive electrode material.

The invention discloses an alpine grassland degradation monitoring and predicting method and system, and relates to the technical field of data processing. According to the alpine grassland degradation monitoring and predicting method and system, a grazing monitoring area and a mouse hole monitoring area of the alpine grassland are determined based on analysis of grazing monitoring data and mouse hole monitoring data of each monitoring area of the alpine grassland and historical area ground data of the alpine grassland; monitoring the grazing monitoring area and the mouse hole monitoring area of the alpine grassland to obtain ground data of the selected monitoring area; based on meteorological altitude factors of the alpine region, data acquisition conditions of the plurality of remote sensing devices are analyzed, first syn-position remote sensing representative data of the alpine grassland are selected, and grassland vegetation conditions of the monitoring region are evaluated in combination with ground data of the monitoring region, so that alpine grassland degradation prediction is realized. The grassland degradation condition is comprehensively analyzed and predicted, the accuracy of grassland degradation monitoring in the high-cold region is expected to be improved, and a scientific basis is provided for grassland resource management and protection.

The invention relates to the technical field of medical image analysis, in particular to a training method and system for a cataract recognition model and a storage medium. The method comprises the following steps: acquiring cataract eye image samples and non-cataract eye image samples in different stages; lesion region segmentation and image synchronous simulation enhancement are carried out on the cataract eye image samples and the non-cataract eye image samples in different stages to obtain cataract lesion enhanced image samples and non-cataract enhanced image samples; extracting local detail features of the lesion and extracting structural features of a mask pair, and constructing a multi-task convolutional neural network learning framework to train a cataract recognition model and optimize focus weighted loss; and obtaining a cataract related key feature set and carrying out online incremental learning updating to generate a cataract recognition online incremental updating model. According to the invention, the accuracy and robustness of cataract recognition model training can be improved.

The invention discloses a low-absorption high-emission radiation refrigeration coating material, which comprises a bottom coating and a surface coating, the bottom coating comprises BaSO4 with different particle sizes and a film forming substance, and the surface coating comprises a surface layer filler and a film forming substance. The invention also discloses a preparation method of the material, which comprises the following steps: dispersing and mixing BaSO4 with different particle sizes, a film-forming substance and a solvent to obtain bottom layer slurry, and filtering to obtain a bottom layer coating; dispersing and mixing a surface layer filler, a film-forming substance and a solvent to obtain surface layer slurry, and filtering to obtain a surface layer coating; the prime paint is sprayed on the surface of the base material, and then the surface paint is sprayed on the surface of the prime paint; and curing to obtain the coating. The material has excellent solar spectrum reflection performance, high infrared radiation performance of an atmospheric window and relatively good ultraviolet aging resistance, and can be applied to multiple fields of high-end optical instrument detection, communication electronics, petrochemical engineering, energy-saving buildings and the like.

The invention provides a 2D Gaussian-based skin surface three-dimensional reconstruction method and system under respiratory movement, and relates to the field of three-dimensional reconstruction, and the method comprises the steps: generating a target point cloud, and obtaining first data information; collecting first feature data information of respiratory movement corresponding to the skin; performing mapping processing to obtain second feature data information; superposing the first data information and the second feature data information, determining target data information, and obtaining a first overall representation model; mapping the first overall representation model to a camera coordinate system to obtain a second overall representation model; and performing rasterization rendering on the second overall representation model to obtain a target image. In the three-dimensional reconstruction process, the influence of respiratory movement on skin surface movement displacement is considered, and the problems that in current skin surface three-dimensional reconstruction, due to the influence of respiratory movement factors, large noise and measurement errors exist, and an image generated through skin surface three-dimensional reconstruction is not ideal are solved.

The invention provides a traceable mitochondrial targeting nano system as well as a preparation method and application thereof, and belongs to the field of medicines. The traceable mitochondrial targeting nano system constructed by the invention can continuously release resveratrol and maintain the photochemical stability of resveratrol. The nano system shows efficient cellular uptake and accurate mitochondrial targeting ability, and promotes removal of mitochondrial ROS and adjustment of mitochondrial autophagy, so that vascular leakage and angiogenesis are relieved, in-vivo microvascular hyperplasia and retina degeneration are remarkably inhibited, and the curative effect is improved. The distribution of the compound in fundus can be monitored in real time through clinical ophthalmological diagnosis equipment, and the compound has a good application prospect in preparation of drugs for preventing and / or treating diabetic retinopathy.

The invention discloses a method and a system for evaluating and analyzing grass and livestock balance in an agricultural and pastoral compound area, and particularly relates to the field of grass and livestock management. According to the method, target evaluation parameters of grassland resource and livestock demand evaluation are determined and monitored, data are verified, compared and analyzed in real time, the real-time performance of the data is evaluated, and classified management is performed, so that the accuracy and timeliness of the data are ensured. And through dynamic adjustment of management decisions, non-real-time data is further analyzed, and evaluation of grassland and livestock supply and demand balance is continuously optimized. According to the method, excessive grazing and degeneration of the grassland are prevented, sustainable utilization of grassland resources and harmonious development of animal husbandry production are achieved, and scientificity and effectiveness of ecological environment management and animal husbandry production are improved.

The utility model belongs to the technical field of electrolytic baths, and particularly relates to a pure water hydrogen production PEM electrolytic bath structure which comprises an anode plate and a cathode plate, the anode plate is provided with an oxygen outlet and a water inlet, the water inlet is fixedly provided with a first connecting shell and a second connecting shell, the first connecting shell is symmetrically provided with connecting assemblies, and the second connecting shell is fixedly provided with a second connecting shell. A filter screen is arranged on the frame and located on one side of the water inlet. According to the utility model, pure water can be conveniently filtered by the filter screen, tiny impurities in the pure water can be intercepted by the filter screen, water flow containing the impurities is prevented from entering the electrolytic bath, when the filter screen is regularly cleaned, the first connecting shell is detached from the second connecting shell by operating the connecting assembly, and then the frame is pulled to move out of the second connecting shell, so that the filter screen is cleaned; the filter screen is arranged on the filter screen to clean impurities on the filter screen, blockage of the filter screen caused by impurity accumulation is avoided, adverse effects of mechanical impurities possibly contained in pure water on the electrolysis process are avoided by filtering the pure water, and the purity of hydrogen produced by the electrolytic bath is improved.

The invention discloses a titanium and titanium alloy cutting tool coating and a preparation method thereof, the titanium and titanium alloy cutting tool coating comprises a coating substrate and a double-layer coating deposited on the substrate, and the double-layer coating sequentially comprises a base layer and a functional layer from the substrate side to the surface side of the double-layer coating. The base layer is composed of a metal compound TiBx, and the functional layer is composed of a metal compound TaSiy. The titanium and titanium alloy cutting tool coating provided by the invention has relatively high wear resistance, high temperature resistance, oxidation resistance and bonding resistance, the bonding strength between the coating and a matrix is good, the production process is simple, the production cost is low, and the titanium alloy cutting efficiency can be effectively improved.

The invention discloses a reseeding device for ecological restoration and treatment of degraded grassland grassland, and belongs to the technical field of grassland seeding equipment. The reseeding device for ecological restoration and treatment of the degraded grassland comprises a vehicle body and a hopper used for throwing grass seeds, and further comprises an outer pipeline connected with the vehicle body through a pivot; when the bottom end of the spiral plate is inserted into soil, the outer pipeline is driven to rotate, and the soil can drive the outer pipeline to move downwards through the spiral plate; a first material through hole is formed in the side wall of the bottom end of the inner pipeline, and a pipe hole of the inner pipeline communicates with a pipe hole of the outer pipeline through the first material through hole; the large end face of the conical body can be attached to the bottom end of a pipe hole of an outer pipeline; and the lifting mechanism is used for driving the inner pipeline to move in the vertical direction relative to the outer pipeline. According to the reseeding device for ecological restoration and treatment of the degraded grassland, when reseeding is carried out on defect positions on the degraded grassland, the grassland does not need to be turned over, so that damage to surrounding grassland caused by reseeding of grass seeds can be avoided, and further degradation of the grassland is prevented.

The invention discloses a chrysanthemum classification method based on a front and back fusion cross attention mechanism, and the method comprises the steps: building a two-way neural network model through the combination of the cross attention mechanism and a residual module design on the basis of a Swin Transform; performing model training and testing by taking the front and back images of the chrysanthemum in the chrysanthemum image database as two-way neural network input, and taking the trained model as a chrysanthemum type prediction model; and collecting front and back images of a to-be-detected chrysanthemum, inputting the front and back images into the chrysanthemum type prediction model, and outputting a classification result through the chrysanthemum type prediction model. The chrysanthemum classification method based on the front and back fusion cross attention mechanism has the advantages of being high in chrysanthemum type recognition speed, high in accuracy, high in stability and the like.

The invention discloses an auricularia auricula strain and a rejuvenation culture medium and a cultivation method thereof, and belongs to the field of edible fungus cultivation. A new auricularia crispa strain is separated from miscellaneous trees at the top of Aoba in Nanpond village, Shixan town, eight-step area, Hexanzhou city, Guangxi Zhuang Autonomous Region, named 'Guiyun No.7', and the preservation number is GDMCC No.65145. The invention further discloses a preparation method of the auricularia crispa strain. The invention also discloses a rejuvenation culture medium which comprises the following components: 20 g / L of barks, 20 g / L of glucose, 2 g / L of yeast extract and 20 g / L of agar, and the barks are cyclobalanopsis barks or maple barks. Through the rejuvenation culture medium, the auricularia auricula strain can be rejuvenated, and strain degeneration is prevented. The crisp agaric strain can also be directly applied to cultivation and production, large-scale cultivation and production of crisp agaric are achieved, and the current situation that only a small-scale experimental research stage exists in crisp agaric cultivation at present is changed.

The invention discloses a method and system for predicting the influence of earthquake on the fatigue life of epoxy resin, and relates to the technical field of fatigue life, and the method comprises the steps: obtaining epoxy resin sample data, and constructing a defect-free epoxy resin sample; applying a seismic spectrum to the defect-free epoxy resin sample based on seismic intensity; performing crack setting on the defect-free epoxy resin sample to obtain a crack-containing epoxy resin model; and performing analysis based on the seismic spectrum and the crack-containing epoxy resin model to obtain a relationship among the seismic spectrum, the stress intensity factor and the fatigue extension life, so as to predict the influence of the earthquake on the fatigue life of the epoxy resin. According to the invention, the FRANC3D and ABAQUS joint simulation method is utilized to research the influence of different factors on the fatigue life of the epoxy resin material in the basin-type insulator under the condition that the epoxy resin material contains micro cracks, reveal the crack formation and expansion mechanism of the epoxy resin material under the earthquake working condition, and reduce the caused economic loss of a power system.

The application discloses a combined power generation method and system based on multi-temperature-zone waste heat recovery. The combined power generation method comprises the following steps: acquiring the cell power of a fuel cell and the power generation power of a hydrogen generator, inputting hydrogen into a multi-stage power generation device to drive the fuel cell to perform a power generation operation, obtaining output first electric energy, first waste heat gas, first heat energy and unreacted hydrogen; inputting the unreacted hydrogen into the hydrogen generator to drive the hydrogen generator to perform a power generation operation according to the hydrogen and the unreacted hydrogen, obtaining second electric energy and second waste heat gas output by the hydrogen generator; acquiring the system temperature of the multi-stage power generation device when performing the power generation operation, and constructing an exhaust passage of an organic Rankine cycle generator to the multi-stage power generation device; driving the organic Rankine cycle generator to perform a power generation operation according to the exhaust passage, the first waste heat gas and the second waste heat gas, and obtaining third electric energy and second heat energy output by the organic Rankine cycle generator, so that the use efficiency of energy is improved.

A phenyldihydropyrimidine compound as represented by formula I, a tautomer or a pharmaceutically acceptable salt thereof. The phenyldihydropyrimidine compound has a good anti-HBV activity and can be used for preparing drugs for treating and / or preventing HBV infections.

The invention provides a composite material pipeline capable of preventing hydrogen leakage, and belongs to the technical field of pipeline preparation. The composite material pipeline comprises an inner pipe layer, a composite gas barrier layer located on the outer surface of the inner pipe layer, a high-temperature-resistant copolymer layer located on the outer surface of the composite gas barrier layer, a reinforcing layer located on the outer surface of the high-temperature-resistant copolymer layer and a corrosion-resistant polymer protection layer located on the outer surface of the reinforcing layer. The composite gas barrier layer is of a multi-layer co-extrusion molding structure and comprises a blending modified PVDC layer, a blending modified EVOH layer and a blending modified PA layer from inside to outside. By means of the multi-layer composite structure, excellent material selection and an optimized production process, the composite material pipeline for preventing hydrogen leakage has the characteristics of excellent gas blocking performance, high strength, corrosion resistance, high temperature resistance, good flexibility and the like, and can effectively solve the problems of hydrogen embrittlement, leakage and corrosion of a traditional steel pipe in the hydrogen conveying process; the method has remarkable technical advantages and wide application prospects.

In the present invention, an insulative tape (50) is disposed so as to cover a positive electrode lead (20) and a positive electrode mix layer (62). The thickness of a first opposing section (71), of the insulative tape (50), which faces the positive electrode lead (20) is configured to be thinner than the thickness of a second opposing section (72), of the insulative tape (50), which faces the positive electrode mix layer (62). The second opposing section (72) includes a substrate layer (81) and an adhesive layer (82). The first opposing section (71) may be configured so as not to have the adhesive layer (82).

The application relates to the technical field of electronic reconnaissance and signal processing, and discloses a radiation source individual fine identification method and system based on multi-modal feature fusion, which comprises the following steps: performing preprocessing on obtained radiation source original signals to obtain signal pulse units; extracting time domain sequences of the signal pulse units and performing multi-domain transformation to generate a first time-frequency image, a second time-frequency image and a bispectrum image; inputting the first time-frequency image, the second time-frequency image, the bispectrum image and the time domain sequence into a multi-modal fusion neural network; extracting corresponding image depth features and comprehensive sequence features through three image processing branches and a sequence processing branch; performing cross-modal fusion on the three image depth features and the comprehensive sequence features through a fusion module to output a radiation source individual identification result. The application improves the identification accuracy of radiation source individuals in a complex electromagnetic environment.

The embodiments of the present invention disclose a method, device, equipment and storage medium for preventing software degradation. The method includes: generating a change order according to a software change request, making software changes in a pre-built sandbox environment, the sandbox environment being consistent with the production environment configuration of the software to be changed online; directing real-time user requests for the software to be changed in the production environment to the sandbox environment for processing; extracting software performance data for processing real-time user requests from the sandbox environment and the production environment respectively; comparing and analyzing the software performance data, and judging whether the software to be changed is degraded after the change according to the results of the comparative analysis. The embodiments of the present invention make software changes in a sandbox environment that is consistent with the production environment configuration, and direct user requests to achieve consistency between the test environment and the user request and the actual environment, and improve the accuracy and objectivity of software performance testing in combination with performance data analysis and comparison, thereby preventing software degradation.

The present disclosure relates to the technical field of computers, and specifically, to a software platform-specific function disassembling and calling method for a third-party program library, and a calling system. The software platform-specific function disassembling and calling method for a third-party program library includes: constructing a third-party program library; verifying legitimacy of the third-party program library; and calling the third-party program library. This realizes an automatic import solution for a function disassembling and calling system of the third-party program library. For both a newly-added third-party program library and an existing third-party program library to which a function change is made, a software platform can automatically identify a function interface by only loading the third-party program library and without requiring a user to manually update a calling program. This method can ensure architectural stability of the software platform and avoid stability degradation caused by repeated modifications to the software platform.

A tracker module (100A) includes a module laminate (90) and one or more integrated circuits that are arranged on the module laminate (90) and that includes an integrated circuit (80). The integrated circuit (80) includes a switch included in a pre-regulator circuit (10), at least one switch included in a switched-capacitor circuit (20), a first IC terminal connected to the switch included in the pre-regulator circuit (10), and a second IC terminal connected to one of the at least one switch included in the switched-capacitor circuit (20). The at least one integrated circuit includes a switch included in a supply modulator (30). The module laminate (90) includes a signal line (901) with which the first IC terminal is connected to the second IC terminal.

The invention discloses a closed circular ceramic high-voltage direct-current magnetic quenching chamber, and relates to the technical field of trigger arc extinguishing, and the closed circular ceramic high-voltage direct-current magnetic quenching chamber comprises an arc extinguishing unit which comprises a mounting assembly arranged in a bottom shell and an arc extinguishing assembly arranged at the other end of the mounting assembly. According to the ceramic closed cavity structure of the high-voltage direct-current arc extinguishing cavity, heat resistance and reliability can be improved, the performance in a high-temperature environment is enhanced, the structural strength is enhanced through the design of the magnetic steel, the electrodes are effectively protected against electric arc damage, the cavity temperature is effectively controlled, material degradation is prevented, the arc extinguishing effect is improved through the built-in magnetic steel assembly and the built-in arc extinguishing assembly, and the service life of the high-voltage direct-current arc extinguishing cavity is prolonged. And through the design of the single-side auxiliary electrode and the mounting assembly, the assembly efficiency is improved, the service life of the product is prolonged, the influence of electric arc on the electrode is reduced, the safety is improved, the breakdown and explosion risks are reduced, and the normal work of the high-voltage relay is ensured.

The invention relates to a post-treatment method for a mercury-based II-VI group nanocrystal with a protective layer formed by chemical oxidation, and solves the problems of poor stability and photoelectric property degradation of the mercury-based II-VI group nanocrystal caused by surface oxidation, ligand desorption and environmental sensitivity. An oxide protection layer with the thickness of 1-3 nm is formed on the surface of the nanocrystal, the long-term stability and the photoelectric property of the nanocrystal are improved, and the method comprises the specific steps of centrifugal purification of the nanocrystal, preparation of an oxidizing agent solution, controllable oxidation reaction, functional ligand surface modification and purification treatment. The oxidation layer is ensured to be compact and stable by accurately adjusting the concentration of the oxidant, the reaction temperature and the reaction time. According to the method, oxygen and moisture permeation is effectively blocked, surface defects are reduced, the quantum yield and the photoelectric property are improved, and the method is widely applied to the fields of post-treatment of mercury-based II-VI group nanocrystals and photoelectric devices.

The invention discloses a microbial carrier implantable soil microstructure improvement device and method, the device takes microbial carrier precise implantation as a core, integrates multiple functions of targeted layered implantation, carrier-soil microstructure synchronous reconstruction, microcapsule in-situ activation and the like, and can improve the soil microstructure through an intelligent regulation and control system and modular design. And efficient improvement of the soil microstructure in different soil layers and different scenes is realized. The device comprises a power module, a control module and a switchable function module, innovatively adopts a targeted layered injection mechanism, a carrier-soil mixing and shaping assembly and an environmental response type microcapsule spray-seeding activation module, and is matched with a degradable carrier material modification assembly and a new energy driving system. The problems that a traditional device carrier is low in implanting precision, not tightly combined with soil, single in application scene and the like are solved.

The invention provides a preparation method of a high-safety composite gel electrolyte, a sodium ion battery and a preparation method thereof, and the preparation method comprises the following steps: dissolving an electrolyte sodium salt in an organic solvent to prepare a mixed solution; adding a polymer monomer, a cross-linking agent and an initiator into the mixed solution to prepare an electrolyte; the preparation method comprises the following steps: dissolving polyvinylidene fluoride co-hexafluoropropylene in dimethylformamide, then adding black phosphorus nanosheets and graphene nanosheets, carrying out primary ultrasonic treatment, and then removing a solvent to prepare a polyvinylidene fluoride co-hexafluoropropylene coated black phosphorus / graphene material; and adding the polyvinylidene fluoride co-hexafluoropropylene coated black phosphorus / graphene material into the electrolyte, and carrying out secondary ultrasonic treatment to prepare the composite gel electrolyte. According to the invention, the liquid electrolyte of the sodium-ion battery is solidified into a gel state, so that the electrolyte loses fluidity, the problems that the electrolyte of the existing sodium-ion battery is easy to leak and burn are solved, and the use requirements of the sodium-ion battery are met.

It is an object to provide an electrode catalyst layer that suppresses degradation due to repeated starting and stopping and has excellent durability, and a membrane electrode assembly using the electrode catalyst layer. The electrode catalyst layer (3) is an electrode catalyst layer used in a polymer fuel electrolyte fuel cell (1), which contains carbon particles which support catalyst (11), a polymer electrolyte (12), and a fiber material which is at least one of a carbon fiber (13) and an organic electrolyte fiber (14), and the thickness of the electrode catalyst layer (3) after performing a start-stop test from 1 V to 1.5 V for 10,000 cycles is 70% or more of the thickness of the electrode catalyst layer (3) before the start-stop test.

A method for producing a dental filling material that includes polyvalent metallic element-including inorganic particles includes a step of treating the inorganic particles with a solution including a chelating agent.

An air conditioner using a flammable refrigerant as a refrigerant includes first refrigerant detection sensor (40) and second refrigerant detection sensor (41) that detect refrigerant leakage. Second refrigerant detection sensor (41) is provided with external air blocking unit (45) that blocks external air coming to sensor (42a) of second refrigerant detection sensor (41), and release unit (48) that releases blocking of external air by external air blocking unit (45).