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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
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
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
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
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
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
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
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
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
Method for optimizing strength of high-temperature metal mine filling mining cemented filling body
PendingCN119538535Areduce manufacturing costSafe and Efficient MiningMaterial fill-upDesign optimisation/simulationMining engineeringNumerical models
The invention discloses a method for optimizing the strength of a high-temperature metal mine filling mining cemented filling body. S1, obtaining a relational expression among the uniaxial compressive strength of the cemented filling body, the concentration and the cement-sand ratio; s2, obtaining a relational expression between the uniaxial compressive strength and the curing temperature; s3, constructing a mutual relationship among the uniaxial compressive strength of the cemented filling body, the curing temperature, the concentration and the cement-sand ratio; meanwhile, constructing a deep ore body three-dimensional numerical model; s4, dividing the ore body to be mined into ore chambers and ore pillars; s5, analyzing the stability of the stope; s6, a cemented filling body matching scheme meeting the strength requirement is obtained; s7, cost is reduced to the maximum extent under the condition that the safety condition is met; and S8, performing stope safety coefficient analysis and optimization calculation in the stoping process of the pillars with different mining depths according to the step S6, and obtaining optimal proportion parameters of the cemented filling body under different mining depth conditions. Mine production cost can be reduced to the maximum extent, and safe and efficient mining of the mine is achieved.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
Aerobic granular sludge sewage treatment process applied to continuous flow activated sludge process
PendingCN119528333ASave in-situ reductionWith in-situ expansionWater contaminantsTreatment with aerobic and anaerobic processesActivated sludgeNitrogen removal
The invention belongs to the technical field of sludge treatment, and particularly relates to an aerobic granular sludge sewage treatment process applied to a continuous flow activated sludge process. A pelletizing agent is added into a granular sludge incubator, so that the pelletizing agent is in targeted combination with filamentous bacteria in activated sludge to form granular sludge, the granular sludge and flocculent sludge are effectively separated through a cyclone separation system, the granular sludge continuously flows back into a biochemical system, and the flocculent sludge is discharged into a sludge concentration tank or a sludge storage tank for dehydration treatment. According to the present invention, the AGS is rapidly cultured and the stable operation is maintained in the current or new continuous flow activated sludge process, such that the treatment water amount of the traditional continuous flow sewage treatment process can be subjected to in-situ capacity expansion, the impact load resistance can be enhanced, the addition amount of the phosphorus and nitrogen removal agent can be reduced, and the in-situ excess sludge can be reduced.
Owner:SHANGHAI QIZHI NEW ENERGY TECH CO LTD +1
Polyimide polymer as well as preparation method and application thereof
The invention discloses a polyimide polymer as well as a preparation method and application thereof, and the preparation method comprises the following steps: carrying out condensation polymerization on dianhydride and diamine, and then carrying out crosslinking, gel aging, solvent replacement and supercritical drying to obtain a polyimide microporous foam material. The dianhydride disclosed by the invention is a commercial product; the diamine comprises novel diphenylmethylene fluorene-based diamine prepared by a two-step method, and other diamines are commercial products; the preparation route of the polyimide microporous foam is simple, and the synthesis method has universality. The polymer chain rigidity of the polyimide microporous foam is moderate, the shrinkage rate is as low as 7.7%, the specific surface area exceeds 670 m < 2 > g <-1 >, the glass-transition temperature reaches 376 DEG C, the polyimide microporous foam has excellent thermal properties, and the thermal conductivity at 150 DEG C is as low as 41.5 mW m <-1 > K <-1 >.
Owner:DALIAN INSTITUTE OF CHEMICAL PHYSICS CHINESE ACADEMY OF SCIENCES
Equipment authority management method and device, medium, electronic equipment and program product
ActiveCN119538225AMeet the needs of personalized equipment permission managementImprove operational efficiencyDigital data authenticationPlatform integrity maintainanceEquipment useServer-side
The invention relates to an equipment authority management method and device, a medium, electronic equipment and a program product, belongs to the field of equipment authority management, can meet equipment authority management requirements in various equipment use environments, and has universality and very high flexibility. The equipment authority management method comprises the steps that a target authority management strategy for target equipment is acquired from authority management strategies pre-configured by a server side, and the target equipment belongs to equipment subjected to authority management by the server side; the pre-configured authority management strategy is an authority management strategy pre-configured by the server for each device subjected to authority management; and according to the target authority management strategy, performing authority management on the administrator authority on the target equipment, and creating a customized token with the administrator authority to perform authority improvement of the target equipment.
Owner:SHANGHAI KAIYONG INFORMATION TECHNOLOGY CO LTD +1
Method for measuring sodium alginate content and M / G ratio
PendingCN119534592AQuick checkImprove efficiencyMaterial electrochemical variablesTitration curveAnalytical technique
The invention discloses a method for measuring the content of sodium alginate and the M / G ratio, belongs to the technical field of quantitative analysis of sodium alginate, and solves the technical problems of complex detection method operation, long reaction time, high cost and large detection result error of the method for measuring the content of sodium alginate in the prior art. The method for determining the sodium alginate content and the M / G ratio provided by the invention comprises the following steps: acidolysis of sodium alginate, titration of a sodium alginate acidolysis solution by using a potentiometric titrator to obtain a titration curve, differentiation of the titration curve to obtain a first-order derivative curve, and calculation of the volume of a corresponding titrant to obtain the sodium alginate content. According to the detection method, a plurality of results can be obtained through one-time titration, the efficiency is high, the method is simple, and rapid detection of the sodium alginate content and the M / G ratio is realized.
Owner:青岛海之林生物科技开发有限公司
Method for identifying agilawood germplasm resources
InactiveCN119530357Aaccurate identificationuniversalMicrobiological testing/measurementDNA/RNA fragmentationEnzyme digestionGenetics
The invention discloses an identification method of agilawood germplasm resources of aquilaria agallocha. The identification method is characterized in that seven pairs of primer sites corresponding to DNA molecular markers of seven genome SNP sites are provided; the method comprises the following steps: carrying out PCR (Polymerase Chain Reaction) amplification and primer effect test, carrying out enzyme digestion on a PCR product, and distinguishing agilawood and aquilaria sinensis according to an enzyme digestion result, and / or distinguishing different varieties of agilawood; if the seven pairs of primer loci are not subjected to enzyme digestion, judging the aquilaria sinensis as aquilaria sinensis. Effective amplification of the agilawood molecular marker is realized by adopting a conventional PCR technology, and the method has universality; genotype identification is completed by integrating an enzyme digestion method with agarose gel, an expensive sequencer is not needed, and the method has the technical advantages of being easy and convenient to operate, low in cost and the like; the polymorphism of genotypes, including homozygous genotypes and heterozygous genotypes, can be accurately identified.
Owner:SOUTH CHINA AGRICULTURAL UNIVERSITY +1
Method for measuring content of aluminum in composite propellant
InactiveCN119643533ASimple processing methodImprove processing efficiencyPreparing sample for investigationAnalysis by thermal excitationPhysical chemistryMaterials science
The invention discloses a method for measuring the content of aluminum in a composite propellant, which comprises the following steps: digesting a sample by using nitric acid and hydrogen peroxide through microwaves, and then fixing the volume and diluting to prepare a sample solution; aluminum element standard solutions with a series of concentrations are prepared, the spectral intensity of the standard solutions is measured through inductively coupled plasma emission spectroscopy, and a standard curve is drawn; and measuring the sample solution under the same condition, calculating the aluminum element concentration through the standard curve, and further calculating the aluminum content in the sample. The method is simple to operate, low in reagent consumption, high in detection efficiency and good in repeatability, has no special requirements on the types of the components of the composite propellant, has universality and can be used for determining the aluminum content in the composite propellant.
Owner:XIAN MODERN CHEM RES INST
Bimetal-based catalyst for synthesizing 2-methoxy-4-methylphenol through vanillin hydrogenation as well as preparation method and application of bimetal-based catalyst
PendingCN119524894Aimprove product qualitylow costOrganic chemistryOrganic compound preparationPtru catalystMolybdenum carbide
The invention belongs to the technical field of synthesis of 2-methoxy-4-methylphenol, and particularly discloses a bimetallic-based catalyst for synthesizing 2-methoxy-4-methylphenol through vanillin hydrogenation as well as a preparation method and application of the bimetallic-based catalyst. Molybdenum carbide (alpha-MoC) is adopted as a carrier, cobalt and iron are loaded by an impregnation method to obtain the bimetallic-based catalyst, and the bimetallic catalyst can be used for obtaining a 2-methoxy-4-methylphenol product with high added value at high yield by taking vanillin as a raw material under mild reaction conditions. The method is short in synthesis process, low in cost, economical, effective, high in universality, environment-friendly, free of corrosion to equipment and high in product quality. The bimetallic-based catalyst not only has excellent catalytic hydrodeoxygenation performance on vanillin, but also has relatively high selectivity on 2-methoxy-4-methylphenol, and in addition, the bimetallic-based catalyst also has excellent cycle stability, wide market prospect and remarkable economic potential.
Owner:HUNAN KOSEN NEW MATERIAL
Method for detecting starch substitution degree based on impedance and conductivity
ActiveCN119438329AImprove detection accuracyimprove accuracyMaterial resistanceDegree of substitutionAnalytical chemistry
The invention provides a method for detecting the substitution degree of starch based on impedance and conductivity, which comprises the following steps: placing a detection cavity containing a to-be-detected modified starch suspension between two parallel detection electrode plates, contacting the to-be-detected modified starch suspension with the detection electrode plates, and placing the detection cavity and the detection electrode plates in a uniform electric field, impedance and conductance signals between the detection electrode plates under the uniform electric field are collected, and the substitution degree of the to-be-detected modified starch is obtained according to a relation among the substitution degree of the same modified starch with the known substitution degree, the suspension concentration, the impedance and the conductance. According to the method provided by the invention, simple, rapid and low-cost detection of the starch substitution degree can be realized on the basis of impedance and conductivity of the modified starch suspension, and the problems that a starch substitution degree detection method in the prior art is complicated and tedious and has relatively high requirements on instruments are solved; the detection method provided by the invention has good accuracy, is suitable for any type of modified starch with different substituent groups, and has good universality.
Owner:LICHENG TESTING & CERTIFICATION GRP CO LTD +1
Method for generating full laying path of mold-free mirror image fiber laying three-dimensional model
The invention relates to a method for generating a full paving path of a three-dimensional model of dieless mirror image fiber placement, which comprises the following steps of: determining a fiber placement reference boundary curved surface of the three-dimensional model based on model characteristics and fiber placement requirements, generating a neutral surface, and generating the full paving path of the three-dimensional model by circularly performing mirror image bias and filtering treatment on the basis of a generated neutral surface fiber placement path. According to the method, the fiber placement path for accurately filling the three-dimensional model is generated by performing equidistant mirror image offset and filtering processing on the neutral surface fiber placement path, the low-efficiency and tedious steps of generating the path after slicing in a traditional method are avoided, and the optimal automatic generation of the full placement path of the three-dimensional model is realized.
Owner:SHANGHAI THINKHEAD M & E CO LTD
An AM-PM distortion calibration method applied to a UWB transmitter
ActiveCN117220697BImplement distortion samplingSimple structureMultiple carrier systemsOriginal dataSoftware engineering
The application provides an AM-PM distortion calibration method applied to an UWB transmitter and belongs to the field of UWB communication. The method adds a sampling resistor between a linear voltage stabilizing power supply LDO and a digital power amplifier DPA driving stage of the UWB transmitter using a digital power amplifier, so as to simulate the instantaneous change of the power supply voltage of the DPA driving stage when the UWB pulse is transmitted; an adjustable delay unit is added between a carrier input port LO and the DPA driving stage; the continuous sine wave is transmitted, the phase information under each digital baseband amplitude control word is collected to form original data of the AM-PM distortion of the UWB transmitter, the digital baseband output AM-PM control word is used to control the adjustable delay unit to output the phase which is opposite to the original data and has the same size, so that the phase predistortion of the transmitted UWB pulse is realized, and the AM-PM distortion calibration is completed. The application has the advantages of simple implementation and strong compensation capacity.
Owner:NEWRADIO TECH CO LTD
Satellite radiation product-based remote sensing image geometric calibration method, electronic device and medium
PendingCN122265108Aremove internal distortionAccurate internal distortionImage enhancementScene recognitionImaging processingSatellite image
The application discloses a kind of satellite radiation product-based remote sensing image geometric calibration method, electronic equipment and medium.The method can include: determining reference image, inputting image to be calibrated;For the same name point matching of image to be calibrated and reference image, obtain the same name point coordinates;The third polynomial distortion model about CCD probe element number is constructed;Based on the same name point coordinates, curve fitting is carried out on the distortion model, and the distortion coefficient is obtained;The resampling of image to be calibrated is carried out by distortion coefficient, and the correction of internal distortion of image is realized.The application can quickly and accurately carry out geometric calibration processing to satellite image, greatly improve the efficiency and quality of image processing.
Owner:CAIHONG DRONE TECH CO LTD
A method for improving expansive soil and a method for predicting its performance based on the clay mineral composition.
This invention discloses a method for improving expansive soil based on its clay mineral composition and a method for predicting its performance. The method for improving expansive soil based on its clay mineral composition includes the following steps: obtaining the optimal admixtures for montmorillonite, illite, and kaolinite clay minerals in expansive soil under different moisture contents through molecular dynamics simulations; after determining the optimal admixtures for the three clay minerals, adding the corresponding admixtures to the corresponding minerals, preparing soil test blocks for testing, and determining the optimal dosage based on the test results; and configuring admixtures to improve the properties of the expansive soil based on its moisture content and mineral composition. This invention constructs a coarse-grained model of real soil particles and corresponding admixtures, tests various properties of the model, and combines machine learning to predict the improvement effect of admixtures on expansive soil under different working conditions. The method of this invention is applicable to the improvement and performance prediction of different expansive soils in different regions and has universality.
Owner:SUN YAT SEN UNIV
Method for replacing and regenerating adsorption bed containing radioactive waste gas
PendingCN119601274AAdsorption purification performance recoveryUniversalGas treatmentNuclear energy generationNuclear plantNuclear power
The invention belongs to the technical field of nuclear power, and particularly relates to a method for replacing and regenerating an adsorption bed containing radioactive waste gas. According to the replacement and regeneration method for the adsorption bed containing the radioactive waste gas, the adsorption and purification performance of the adsorption bed containing the radioactive waste gas can be recovered in a carrier gas protection and heating regeneration mode, the method has good universality, the technological process is simple and convenient, the operation cost is low, safety is high, and the popularization and application prospects are wide; the cost reduction and efficiency improvement of the radioactive waste gas treatment process of the nuclear power plant are promoted.
Owner:SANMEN NUCLEAR POWER CO LTD +1
A process for the preparation of a bisphenol fluorene polyether
The application provides a preparation method of a diphenylfluorene polyether. The method uses diphenylfluorene as a substrate, butylene oxide as an epoxide monomer, toluene as an organic solvent, and under the action of a composite catalyst, reacts at 110-200 DEG C for 2-6 hours to obtain the diphenylfluorene polyether. The composite catalyst is obtained by reacting a porous aromatic skeleton with a bromoalkyl quaternary ammonium salt to obtain a quaternary ammonium salt functionalized porous aromatic skeleton, and finally, a basic catalyst is limitedly encapsulated in the pore channel of the quaternary ammonium salt functionalized porous aromatic skeleton by electrostatic attraction. The catalyst of the method can be recycled and reused, and the yield retention rate is greater than or equal to 92% after the composite catalyst is used for 5 cycles, and the method is suitable for optical display, high-frequency circuit board, semiconductor packaging and other fields.
Owner:SHANGHAI BRONKOW CHEM CO LTD