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Point cloud segmentation method and system based on double channels
PendingCN119672036AAdjustable structureimprove accuracyImage analysisCharacter and pattern recognitionAlgorithmNetwork architecture
The invention discloses a point cloud segmentation method and system based on two channels, and relates to the technical field of computer vision and artificial intelligence, and the method comprises the steps: collecting point cloud data; creating a feature channel according to the three-dimensional point cloud data; and performing feature fusion and classification according to the feature channel. According to the point cloud segmentation method based on the two channels, different types of features are processed in different channels, high calculation efficiency is kept while global feature dependence is captured, and the method is suitable for processing and segmentation tasks of large-scale point cloud data. Two different network architectures are used, the structure and parameters of the model are flexibly adjusted to adapt to different application requirements, and a more efficient and reliable solution is provided for a point cloud segmentation task in a complex three-dimensional scene. The method has better effects in the aspects of segmentation precision, segmentation result accuracy and universality.
Owner:SHANGHAI INST OF TECH
Marine chlorophyll concentration inversion method based on machine learning
InactiveCN119128528Aincrease credibilityImprove forecast accuracyBiological modelsAlgorithmRemote sensing reflectance
The invention provides a machine learning-based marine chlorophyll concentration inversion method, which comprises the following steps of: clustering remote sensing reflectivity data to obtain clusters corresponding to different water body types, and applying training sets to various machine learning models for training according to the water body types to obtain a plurality of machine learning models; and performing performance verification on different optimization machine models under different water body types by using the verification set to obtain optimal machine learning models under different water body types, and finally forming a chlorophyll concentration dynamic inversion model. And carrying out chlorophyll concentration inversion by adopting the optimal machine learning model of the corresponding water body type, so that the model has a wide application scene. The chlorophyll concentration dynamic inversion model provided by the invention has very strong universality, and the global sea area water color information monitoring capability is effectively improved.
Owner:NANJING UNIV OF INFORMATION SCI & TECH
Quantitative layered uniform mixing and returning device for crop straws
ActiveCN119138207Aachieve reasonable distributionReasonable burial depthSpadesPlantingAgricultural scienceAgricultural engineering
The invention discloses a crop straw quantitative layering uniform mixing and returning device which comprises a straw collecting mechanism, a fan conveying mechanism, a flow dividing mechanism, a furrow opener assembly, a uniform mixing assembly and a soil covering assembly. A straw picking device and a straw conveyor are arranged at the front end of the device and used for collecting straw scattered in the field and conducting pretreatment before returning to the field; treated straw is sucked into a straw quantitative flow dividing box through a centrifugal fan, the straw is quantitatively distributed into a flow dividing guide pipe according to the returning-to-field requirement, the flow dividing guide pipe is discharged into a furrow opener, grooves with different depths are formed according to the straw returning-to-field depth requirement, and then the straw and soil are evenly mixed under the effect of a uniform mixing assembly. According to the invention, the flow distribution principle of the centrifugal fan is utilized, air ducts with different cross sections are arranged, so that straws with different volume numbers are obtained, and under the action of the furrow opener assembly and the uniform mixing assembly with different depths, the quantitative, layered and uniform mixing returning of the straws to the field is realized.
Owner:HENAN UNIV OF SCI & TECH
Active equalization control method for SOC of multiple battery modules of energy storage system SCLBC
PendingCN119154453Aextend your lifeuniversalBatteries circuit arrangementsDc-dc conversionElectrical batteryNew energy
The invention belongs to the technical field of power electronics and the technical field of new energy storage, and relates to an energy storage system SCLBC multi-battery module SOC active balance control method which comprises the steps that a charging process control method and a discharging process control method are adopted, sampling equipment including a BMS sends information to a controller, the controller synthesizes information such as SOC of all modules, the information is analyzed and processed, and the SOC of all the modules is obtained. The obtained single-module power regulation information is transmitted to each corresponding module, and a bidirectional DC-DC converter in each module regulates the duty ratio to make a response, so that the power reaches a set value, and a control target is completed; by monitoring the state of the battery in real time, analyzing the proper working state and dynamically adjusting the working mode of each battery to adjust the working state, the service life of the battery is prolonged, the energy consumption is ensured to be the lowest as far as possible and the balance control is completely realized, so that the problems of limited conditions and imperfect control methods of the control method in the prior art are solved.
Owner:XI AN JIAOTONG UNIV
Method for inverting water quality lacking remote sensing image by combining migration and space-time deep learning
PendingCN119625551AuniversalExpand the scope of researchable areasGeneral water supply conservationScene recognitionWater qualityEngineering
The invention relates to a method for inverting water quality without a remote sensing image by combining migration and space-time deep learning, which comprises the following steps: firstly, acquiring a satellite image and ground observation data of an area A, and automatically extracting a water area based on an SAM segmentation large model; associating satellite image data with ground observation data through spatio-temporal information, and establishing a water quality inversion model of the region A by using a deep neural network; acquiring a satellite image and ground observation data of the region B, segmenting a cloud occlusion region by using an SAM segmentation large model, and performing fine tuning by using a small sample of the region B through transfer learning to obtain an inversion model with satellite data of the region B and a result; and finally, combining the inversion result with a time sequence interpolation, and establishing space-time model correction by using a space-time deep learning network GTWNN, thereby estimating the inversion result which does not have satellite data but has ground observation station information pixel by pixel. The method has automation, high efficiency and universality under the conditions that the cloud amount is large and no unmanned aerial vehicle is used, and the water quality state can be continuously monitored at low cost.
Owner:HUAZHONG NORMAL UNIV
Dynamic modeling method for attitude control system under dynamic fault
ActiveCN119670369AuniversalSustainable transportationDesign optimisation/simulationDynamic modelsDynamic equation
The invention relates to a dynamic modeling method for an attitude control system under a dynamic fault. The method comprises the following steps: determining a modeling hypothesis of a nonlinear dynamic model; establishing a coordinate system used for modeling; rocket configuration parameters and engine related parameters are obtained; building displacement and acceleration descriptions of the three types of structures on the rocket; establishing a rigid body translation equation, a rigid body rotation equation, a rocket body elastic vibration equation, a propellant shaking equation and a sensitive element measurement equation; summarizing the five established equations to form a nonlinear dynamic equation set; and performing small-disturbance linearization expansion on the nonlinear dynamic equation set on the basis of the nominal reconstructed trajectory to obtain a linearized small-deviation equation set suitable for controller design and stability analysis. According to the method, the influence of the thrust drop fault is comprehensively considered, and the model can be used for carrying out relatively accurate dynamic response analysis and reconstruction scheme design under the fault.
Owner:BEIJING INST OF ASTRONAUTICAL SYST ENG
Gas circuit transmission device and method for adsorbing and clamping thin-wall spherical shell type complex tiny component
ActiveCN119115606AMeet the adsorption requirementsMeet compressed air conditionsPositioning apparatusMetal-working holdersVacuum chamberMachining
The invention relates to a gas circuit transmission device and method, in particular to a gas circuit transmission device and method for adsorbing and clamping thin-wall spherical shell type complex tiny components. The invention aims to solve the problems that the clamping force cannot be controlled, the clamping precision is poor, and the negative pressure cannot be transmitted to a rotary motion part by a conventional negative pressure adsorption means, so that the clamping requirements of thin-wall spherical shell type complex and tiny components cannot be met. The device comprises a vacuum suction head and a vacuum cavity, and further comprises a negative pressure communicating pipe, a workpiece shaft, a transition element, a zero-point quick-change system, a gas circuit conducting pipe, a quick-change connecting piece and a clamp base. The negative pressure communicating pipe, the workpiece shaft, the transition element, the zero-point quick-change system, the quick-change connecting piece, the clamp base, the vacuum cavity and the vacuum suction head are sequentially connected end to end, and the transition element is connected with the clamp base through the gas circuit communicating pipe. The device is used for stable adsorption during machining of surface feature structures of thin-wall spherical shell type complex and tiny components.
Owner:HARBIN INST OF TECH
Rotary clamping self-centering tool
Owner:SHANXI FENXI HEAVY IND CO LTD
Insulating pull rod lightweight design method based on multi-objective optimization algorithm
PendingCN119538634ASolve technical problems in lightweight designMeet the needs of lightweight designChaos modelsNon-linear system modelsMulti objective optimization algorithmData set
The invention discloses an insulating pull rod lightweight design method based on a multi-objective optimization algorithm, and aims to solve the problems of heavy weight and heavy workload of a bearing tool in hot-line work of an ultra-high voltage transmission line. The method comprises the following steps: setting electrical and mechanical property parameters of the insulating pull rod; then, a three-dimensional model is built through SolidWorks, and finite element analysis is carried out through COMSOL; then, an optimized data set is obtained through joint simulation of MATLAB, COMSOL and SolidWorks; secondly, establishing a mathematical optimization model, solving by adopting a particle swarm-grey wolf optimization algorithm, and improving the algorithm through Sine-Tent-Cosine chaotic mapping population initialization and a crisscross strategy; and finally performing simulation verification on the optimization scheme. The device is applied to the lightweight design of large-load insulating force-bearing tools, effectively shortens the development period of the tools, saves the production cost, improves the safety coefficient of hot-line work, and remarkably reduces the workload of hot-line workers.
Owner:CHINA THREE GORGES UNIV
Pollution tracing method based on three-dimensional fluorescence spectrum
ActiveCN119534411AEasy extractionreliable extractionPreparing sample for investigationCheminformatics data warehousingFluorescence spectraIndustrial systems
The invention discloses a pollution source tracing method based on a three-dimensional fluorescence spectrum, and relates to the technical field of water quality monitoring, a water sample of an upstream specific pollution discharge unit is collected as a pollution source, a mixed water sample formed by mixing different pollution source water samples according to different volumes or proportions is prepared, and a pollution source database adapted to parallel factor analysis is established; according to the pollution source tracing method, a good linear model between a pollution source and a three-dimensional fluorescence spectrum characteristic value is established, a shortest path algorithm is proposed to quantitatively solve the volume or proportion of the pollution source in a monitored water sample, and the pollution source is traced to a specific pollution discharge unit. According to the invention, the sewage three-dimensional fluorescence spectrum database established by mixing upstream pollution source drainage improves the application range of parallel factor analysis, so that the three-dimensional fluorescence spectrums of sewage of different industrial systems can be subjected to effective parallel factor analysis together; compared with a parallel factor analysis-Tucker congruence coefficient method, the method has the advantage that the pollution source can be traced to a more specific level.
Owner:SHANGHAI JIAOTONG UNIV
Multi-type meteorological self-recording paper trace identification method based on deep learning
ActiveCN119672492AuniversalThe recognition result is accurateCharacter and pattern recognitionNeural learning methodsComputational scienceTemplate matching
The invention relates to the technical field of meteorology, and discloses a multi-type meteorological self-recording paper trace identification method based on deep learning. The deep learning technology is utilized, and a cross-platform computer vision library OpenCV is combined, so that extraction and result quantification of multi-type meteorological self-recording paper trace data are realized; aiming at vertical shaft wind direction / wind speed self-recording paper, adopting a U-net semantic segmentation network to complete trace segmentation extraction; grid extraction is realized by applying a template matching and edge detection algorithm, and then quantification of an extraction result is realized according to related meteorological specifications; the method comprehensively considers the differences of different types of self-recording paper in the aspects of size, color, size, scale, line shape and the like from multiple dimensions of grid extraction, trace extraction, result quantification and the like, highly restores trace information, is suitable for trace digital extraction business processing of wind, rainfall, temperature, air pressure and the like, and has a wide application prospect. The workload and the labor cost can be greatly reduced.
Owner:TIANJIN METEOROLOGICAL INFORMATION CENT
Novel antifouling developing coating material as well as preparation method and application thereof
ActiveCN119101421AImprove antifouling performanceresist attachmentSurgeryCatheterPhosphorylcholinePlatinum nanoparticle
The invention provides a novel antifouling developing coating material and a preparation method and application thereof, the antifouling developing coating material has a structure as shown in formula I. In the structure of the antifouling developing coating material, platinum nanoparticles are connected with a modified phosphorylcholine polymer, and the modified phosphorylcholine polymer is partially used as an antifouling unit; and the platinum nanoparticles are used as developing units, so that the antifouling developing coating material has excellent antifouling performance and developing performance at the same time. The siloxane group in the antifouling unit can form covalent binding with the surface of the substrate, so that the coating is firmly bound on the substrate, the binding stability and safety of the antifouling developing coating material on the substrate are ensured, the antifouling developing coating material cannot be lost or fall off along with time lapse, the durability and reliability of the developing coating are remarkably improved, and the service life of the developing coating material is prolonged. Wide application prospects are realized.
Owner:SUZHOU SILVER MARS NEW MATERIALS TECHNOLOGY CO LTD
Hydrophobically modified flexible material and surface hydrophobic modification method thereof
The invention provides a hydrophobic modified flexible material and a surface hydrophobic modification method thereof. The modification method comprises the following steps: carrying out pre-activation treatment on the surface of a flexible material to obtain a pre-activated flexible material; a silane coupling agent is used for treating the pre-activated flexible material to generate an active film, the flexible material covered with the active film is obtained, and the active film comprises hydrolysable groups derived from the silane coupling agent; performing secondary activation treatment on the flexible material covered by the active film to obtain a hydrophilic secondary activated flexible material; a hydrophobic substance is used for modifying the secondary activated flexible material to generate a hydrophobic membrane, the hydrophobic modified flexible material is obtained, and the hydrophobic substance comprises hydrophobic silane; the surface roughness Rq (root mean square roughness) value of the hydrophobically modified flexible material is 1 nm or less. According to the method, the hydrophobic performance of the surface of the flexible material can be effectively improved, meanwhile, the flexible material is not damaged, the surface of the material is smooth, and contact angle hysteresis is small.
Owner:TSINGHUA UNIVERSITY
Land utilization information extraction method and system based on historical soil survey text
PendingCN119128046Areduce investmenthigh degree of automationData processing applicationsWeb data indexingWeb crawlerBiology
The invention discloses a historical soil survey text-based land utilization information extraction method and system. The method comprises the following steps of: establishing a plant name dictionary of three land utilization types of paddy fields, dry lands and other forest lands in a research area; reading a vegetation description text Vi of a sampling point from a historical soil survey text of a research area, judging whether the Vi contains plants in a plant name dictionary or not, if so, assigning a land utilization type corresponding to the plant to a related variable of a species name, assigning a coverage value corresponding to full coverage to the coverage, storing the coverage in a species information list, and if not, assigning the coverage value corresponding to the full coverage to the species information list; otherwise, using a regular expression and an information extraction method to obtain names and coverage degrees of main species, and storing the names and the coverage degrees in a species information list; for each element in the species information list, extracting a corresponding life type from a preset plant website by using a web crawler technology; and inferring the land utilization type of the sampling point according to the life type and the corresponding coverage degree. The method is high in efficiency.
Owner:INST OF SOIL SCI CHINESE ACAD OF SCI +1
Battery performance test method and device, electronic equipment, storage medium and program product
PendingCN119125896AGuaranteed accuracyreduce performanceElectrical testingElectrical batteryCritical test
The invention relates to the technical field of batteries, in particular to a battery performance test method and device, electronic equipment, a storage medium and a program product. Obtaining each first test frequency and first test data corresponding to each first test frequency, which are obtained after the target battery is subjected to charge-discharge cycle tests for preset times under a preset pre-tightening force working condition; based on the first test data corresponding to each first test frequency, predicting test data corresponding to a second test frequency of the target battery after the preset frequency, and generating preset test data; obtaining second test data obtained after the target battery is subjected to a second number of charge-discharge cycle tests; according to the preset test data and the second test data, determining that the second test frequency is the critical test frequency corresponding to the performance critical value of the target battery; the accuracy of the determined critical test times is ensured, whether the target battery meets the specification or not can be detected, calculation is convenient, and universality is high.
Owner:三一红象电池有限公司
Plant leaf spot diffusion prediction method and system
ActiveCN119151883Ageneralizablefit closelyImage enhancementImage analysisAlgorithmTransition probability matrix
The invention belongs to the field of plant disease prevention and control, and discloses a plant leaf spot diffusion prediction method and system based on a Markov model and a long-short memory time network, and the method comprises the steps: continuously collecting a grape leaf spot diffusion process image series, extracting the related leaf spot features of each image, and carrying out the prediction of the leaf spot diffusion; constructing features extracted from the series of images into a time sequence; training an LSTM (Long Short Term Memory) prediction model, so that the LSTM prediction model can predict a subsequent spot feature region; the method comprises the following steps of: converting a test picture into gray scale maps according to leaf surface features, regarding the change of pixels of each leaf surface gray scale map as a discrete Markov process, calculating a probability transfer matrix of the next step through leaf surface pixel features predicted by an LSTM network, calculating a next leaf surface gray scale map by adopting a discrete Markov model, and calculating a probability transfer matrix of the next step; and a final diffusion prediction map is obtained through image adjustment. The method predicts and simulates the diffusion process of leaf scabs to a certain extent, and the model has generalization and is easy to popularize to spot diffusion research of other plant disease species.
Owner:SOUTHWEST FORESTRY UNIVERSITY
Circularly polarized long afterglow material and preparation method and application thereof
PendingCN119120003AEasy to manufacturelow costPolarising elementsLuminescent compositionsSelective reflectionOptical polarization
The invention discloses a circular polarization long afterglow material and a preparation method and application thereof.The circular polarization long afterglow material comprises a first film layer and a second film layer, the first film layer is a phosphorescent film, or the first film layer comprises a phosphorescent film and a fluorescent film, and the second film layer is a cholesteric liquid crystal polymer film. By utilizing radiation energy transfer and selective reflection property of the cholesteric liquid crystal polymer, the provided circular polarization long afterglow material has the dual characteristics of long service life and high glum value, and has good application value in the aspects of information encryption and anti-counterfeiting.
Owner:EAST CHINA UNIV OF SCI & TECH
PLP installation height selection method for lightning protection of long-span power transmission line in plateau mountain land
ActiveCN119134202Afull length protectionreduce investmentGeometric CADInstallation of lighting conductorsElectric power systemConductor sag
The invention relates to the technical field of power system protection, in particular to a PLP installation height selection method for lightning protection of a long-span power transmission line in a plateau mountain land. The method comprises the steps that the tower height difference between two towers, the height difference between the height of a wire on a cross arm and the height difference between the tops of the towers, the sag height of the wire and the horizontal tower distance between the two towers are obtained through measurement; the arc section protection radius of the PLP device is calculated according to the tower height difference and the horizontal tower distance; the curvature of the sag lowest point in the geometric equation of the overhead conductor is calculated, and the geometric equation takes the sag lowest point as the origin of coordinates, takes the direction from a lower tower to a higher tower as the X-axis forward direction, and takes the vertical upward direction as the Y-axis forward direction; and when the curvature is smaller than the reciprocal of the protection radius of the arc section, the installation height of the PLP on the tower is calculated according to the horizontal tower distance, the height difference and the conductor sag height. The objective of the invention is to solve the problem of how to calculate non-equal-height PLP installation height selection in the plateau mountain land large-span power transmission line.
Owner:KUNMING UNIV OF SCI & TECH
Multi-source data fusion axial flow compressor instability prediction method
InactiveCN119670025Aimprove completenessImprove forecast accuracySustainable transportationCharacter and pattern recognitionData setOptimality model
The invention discloses a multi-source data fusion axial flow compressor instability prediction method, and belongs to the technical field of aero-engine modeling and simulation. The method comprises the following steps: firstly, preprocessing dynamic pressure sensor data, constructing a multi-source data set and dividing the multi-source data set; secondly, respectively constructing a time domain feature extraction network module, a time-frequency domain image feature extraction network module and an interactive fusion module based on a cross-domain attention mechanism; thirdly, on the basis of the three modules, a multi-source data fusion compressor instability prediction model based on a cross-domain attention mechanism is constructed, and the model is trained to save an optimal model; and finally, performing real-time prediction on test data. According to the method, data of multiple sources are comprehensively processed and analyzed, complementarity and relevance among different data sources are captured, more comprehensive, complete and consistent perception about a target observation object is formed, diagnosis errors caused by a single data source are reduced, and the accuracy and reliability of a prediction result are improved.
Owner:DALIAN UNIV OF TECH
Acquisition method, analysis method and system of biological material mechanical property of blood vessel
PendingCN119130981AEnable personalized assessmentuniversalImage analysisCatheterBiological materialsBiology
The invention discloses a blood vessel biomaterial mechanical property acquisition method which comprises the following steps: acquiring a first image of a blood vessel, and acquiring HU values of the blood vessel in different biological areas based on the first image; acquiring material mechanical property parameters of different biological areas of the blood vessel in an in-vitro state; and based on the HU value and the material mechanical property parameter, obtaining a corresponding relation between the HU value and the material mechanical property parameter. The corresponding relation between the HU value and the mechanical property parameters of the material, which is constructed by the method, has universality. The blood vessels of subsequent specific individuals are subjected to personalized evaluation, the plaque state is reflected, specific problems are specifically analyzed, and an accurate result is obtained through biological material mechanical analysis of the blood vessels. The invention further discloses a system for acquiring the biological material mechanical property of the blood vessel, a method and a system for analyzing the biological material mechanical property of the blood vessel, electronic equipment and a computer readable storage medium.
Owner:SHANGHAI JIAOTONG UNIV
Uric acid crystal and soluble uric acid combined renal injury animal model and construction method thereof
ActiveCN119278897AImprove stabilitygood repeatabilityHeterocyclic compound active ingredientsAnimal husbandryPotassium oxonatePotassium
The invention discloses a method for constructing a renal injury animal model caused by combination of uric acid crystals and soluble uric acid, which comprises the following steps: applying a urate crystal suspension and a mixed solution of oteracil potassium and uric acid to an experimental animal, the dosage of the urate crystal suspension being 0.5-100mg / kg; the dosage of oteracil potassium per day in the mixed solution of oteracil potassium and uric acid is 750 mg / kg, the dosage of uric acid per day is 300 mg / kg, the dosage of oteracil potassium per day and the dosage of uric acid per day are both calculated according to the weight of the experimental animal, and the application time of the mixed solution of oteracil potassium and uric acid is 3-4 weeks. The invention also discloses the uric acid crystal and soluble uric acid combined renal injury animal model constructed by the method. The method can stably establish an animal kidney injury model caused by increase of soluble uric acid in the kidney and coexistence of urate crystals. And the established model is high in credibility, high in accuracy and universal.
Owner:GUANGDONG HOSPITAL OF TRADITIONAL CHINESE MEDICINE
Difunctional oxygen electrocatalyst with asymmetric coordination structure as well as preparation method and application of difunctional oxygen electrocatalyst
PendingCN119542441Awell formeduniversalMaterial nanotechnologyFuel and secondary cellsPtru catalystElectrical battery
The invention provides a bifunctional oxygen electrocatalyst with an asymmetric coordination structure and a preparation method and application thereof, a porous layered precursor is formed through an amide reaction between melamine and citric acid, and the special structure and different functional groups of the porous layered precursor provide many sites for insertion and adsorption of transition metal ions; and an asymmetric coordination structure with high active sites can be formed, the electronic structure of transition metal ions is effectively optimized, and the electro-catalytic performance is improved. The bifunctional oxygen electrocatalyst prepared by the invention shows excellent ORR / OER activity under alkaline conditions, and the power density of a zinc-air battery driven by the bifunctional oxygen electrocatalyst as a cathode catalyst reaches up to 226.7 mW cm <-2 >.
Owner:HUANGHUAI UNIV
Measurement-based quantum calculation method of physical drive variable component sub-character solver
PendingCN119129761Aefficient descriptionaccurate descriptionQuantum computersQuantum circuitSoftware engineering
The invention provides a measurement-based quantum calculation method for a physical driving variable component sub-character solicitation solver, and the method comprises the steps: S1, constructing a variational structure according to a Hamiltonian expression of a to-be-solved quantum multi-body system; s2, converting the variational structure into a graph state and a measurement mode corresponding to a measurement type quantum calculation scheme; s3, initializing an input state; s4, according to the designed measurement sequence, performing a series of single particle measurement on the graph state from the input state to obtain the output state of the variable component sub-line; and S5, continuously iteratively optimizing the variational parameters until the ground state energy of the target Hamiltonian is solved. According to the method, a variational structure is constructed from Hamiltonian of a problem to be solved, the advantages of single-particle measurement operation in measurement type quantum calculation are utilized, implementation of a multi-quantum-bit revolving door is simplified by introducing a small number of auxiliary quantum bits, and therefore quantum resource overhead of a quantum circuit is greatly reduced.
Owner:BEIHANG UNIV
Remote sensing system digital model integrated modeling method oriented to satellite-ground cooperative task planning
PendingCN119578048AMeet on-orbit usage requirementsLarge mission performanceGeometric CADDesign optimisation/simulationAttitude controlDigital mockup
The invention discloses a remote sensing system digital model integrated modeling method for satellite-ground cooperative task planning. The method comprises the following steps: abstracting a remote sensing system into a digital system consisting of an operation management model, an orbit model, a task planning model, an attitude control model, a target environment model, an atmospheric correction model, a load model, a data transmission model, a power supply and distribution model, an on-satellite processing model and a task efficiency model; the method truly reflects the solving process of a remote sensing system facing key constraints, is close to the whole satellite-ground application process, realizes refined calculation and estimation of the process operation condition, and meets the requirements of satellite-ground key technical index verification.
Owner:CHINA ACADEMY OF SPACE TECHNOLOGY +1
Novel antifouling developing coating material as well as preparation method and application thereof
The invention provides a novel antifouling developing coating material and a preparation method and application thereof.The antifouling developing coating material has the structure shown in the formula I. The antifouling developing coating material has excellent antifouling performance and developing performance at the same time, the stability and durability of the developing effect can be ensured, good safety is achieved, and the antifouling developing coating material can be applied to the field of chemical engineering. And the method has a wider application range.
Owner:SUZHOU SILVER MARS NEW MATERIALS TECHNOLOGY CO LTD
Underground water numerical simulation method coupled with vegetation ecology
ActiveCN121980854AAchieve two-way couplingUniversalDesign optimisation/simulationCAD numerical modellingVegetationPhysical model
The invention relates to the technical field of underground water simulation, in particular to an underground water numerical simulation method coupled with vegetation ecology. The method realizes bidirectional coupling between groundwater and vegetation ecology through iteration, and specifically comprises the following steps: inverting vegetation coverage based on groundwater burial depth; inversion of actual evapotranspiration is carried out based on underground water burial depth and vegetation coverage; and finally, updating the net supply amount of the groundwater model based on evapotranspiration until convergence. According to the method, a statistical function relation is established to replace a complex physical model, and drainage and overflow cell water levels are corrected in iteration to ensure calculation stability.
Owner:CHINA UNIV OF GEOSCIENCES (BEIJING)
Method for treating organic wastewater by using composite material constructed by waste lithium iron phosphate to activate peroxymonosulfate
PendingCN119612741Ahigh activitycyclic stabilityWater treatment parameter controlPhysical/chemical process catalystsHydration reactionPtru catalyst
The invention belongs to the technical field of solid waste recycling and organic wastewater treatment, and particularly relates to a method for treating organic wastewater by utilizing a composite material constructed by waste lithium iron phosphate to activate peroxymonosulfate. The method comprises the following steps: carrying out pyrolysis treatment on a waste lithium iron phosphate battery positive electrode material, and collecting a waste lithium iron phosphate SLFP powder material; preparing the SLFP into a uniform solution; sodium molybdate dihydrate and thioacetamide are added into the solution for a hydrothermal reaction, and a composite catalyst material SLFP-MoS2 is prepared; putting the catalyst into the wastewater to achieve adsorption equilibrium; and adding peroxymonosulfate to trigger an oxidation reaction, and removing organic pollutants in the solution. The SLFP-MoS2 catalyst provided by the invention can realize mutual promotion of Fe-Mo bimetal active sites, ensures stable circulation of iron ions and molybdenum ions in a local microenvironment, further activates peroxymonosulfate (PMS) to generate active species, and realizes effective removal of organic pollutants in wastewater.
Owner:SHANGHAI SECOND POLYTECHNIC UNIVERSITY
Quantitative characterization method for lithogenous phase of tight sandstone reservoir
PendingCN119539512Aeasy accessuniversalData processing applicationsClimate change adaptationCorrelation coefficientWell logging
The invention discloses a compact sandstone reservoir diagenetic phase quantitative characterization method which is characterized by comprising the following specific steps: step 1, determining diagenetic phase evaluation parameters and obtaining a parameter sequence; step 2, determining a correlation coefficient of the parameter sequence obtained in the step 1 by applying a grey correlation method, and calculating a correlation degree; step 3, constructing a multivariate comprehensive classification coefficient Feci; 4, dividing lithogenous phase types according to the multivariate comprehensive classification coefficient obtained in the step 3; and 5, performing logging characteristic analysis on the types of the diagenetic facies divided in the step 4, selecting a sensitive logging curve, and obtaining a discrimination function by using a Fisher discrimination method so as to realize quantitative identification of the diagenetic facies. According to the method, evaluation parameters are high in credibility and objective, so that lithogenous phase judgment can be more accurate.
Owner:PETROCHINA CO LTD
Slow start circuit based on BUCK converter
PendingCN119134878Areduce volumeStrong short-term overcurrent capabilityDc-dc conversionEmergency protective arrangements for limiting excess voltage/currentMOSFETCapacitance
The invention provides a slow power-on circuit for a servo system. The slow power-on circuit comprises a control power supply module, a BUCK converter module, a PWM generator module, a state display module and a totem pole driving module. A BUCK converter is connected in series between main power loops, the magnitude of surge current is determined by the peak value of inductive current, and the increase of voltage on a capacitor is realized by controlling the duty ratio of an MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor). The high-frequency inductor is adopted to suppress surge current, so that space is saved, and the energy utilization rate is increased; the voltage at the two ends of the load capacitor is gradually increased by adopting a method for adjusting the duty ratio to be gradually increased, and universality is achieved; the peak value of the input current is effectively reduced in a duty ratio chopping mode, and the time required by the slow power-on process is shortened; whether a fault occurs in the slow power-on process or not is judged according to the light emitting condition of the light-emitting diode.
Owner:BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS
Intelligent assembly system and process method for stator iron core of hydraulic generator
PendingCN119543557AImprove installation qualityImprove work efficiencyManufacturing dynamo-electric machinesLogistics managementPunching
The invention belongs to the technical field of mechanical and electrical installation, and discloses an intelligent stacking system and process method for a stator core of a hydraulic generator. The hydraulic generator stator core intelligent stacking system is composed of an intelligent logistics warehousing system, an automatic lamination system, an automatic measurement system and a digital twinning system. The process method comprises an iron core punching sheet intelligent storage and transfer process, an iron core punching sheet automatic stacking process and an iron core size automatic measurement process. According to the invention, full-process automation, punching sheet storage, intelligent transfer, punching sheet stacking and measurement process automation are realized in the stator core assembling and laminating process, a digital twin technology is adopted, a real-time installation scene is mapped in front of a computer screen, and the working state of the system can be remotely controlled. The labor intensity of personnel is relieved, the safety of the personnel is guaranteed, the installation quality is improved, the installation period is shortened, automatic measurement is achieved, measurement is efficient, measurement data is accurate, and whole-process data storage and query are achieved.
Owner:HARBIN ELECTRIC MASCH CO LTD