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63results about How to "Theoretical perfection" patented technology
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Real-time hydrologic forecasting system
InactiveCN105912770ASolve the problem of uneven space-time distributionTake advantage ofClimate change adaptationSpecial data processing applicationsAutomatic controlComputer module
The present invention provides a real-time hydrologic forecasting system. The real-time hydrologic forecasting system comprises a data input module, a model base and a data output module, and the model base comprises a grid unit runoff module, a sub catchment conflux module, a catchment river conflux module and a real-time correction module. According to the system, values or parameters adopted by calculation in the next forecasting can be appropriately adjusted by utilization of up-to-date information obtained during the forecasting process, a series of previous forecasting error information including the current period are considered for each forecasting, the future prediction value is corrected according to the tracking technology of the automatic control theory, and hydrologic forecasting precision is increased. In addition, the system is based on a distributed Xin'an River model based on grids, and compared with a traditional model, the system can be operated for a catchment having few data. The system has a visual interface, and operation practicality is high.
Owner:SUN YAT SEN UNIV
Interactive image segmentation method for multiple foreground targets
The invention provides an interactive image segmentation method for multiple foreground targets. The method comprises the following steps of: performing linear reconstruction on pixel colors in an image local window, and repeatedly modifying color reconstruction coefficients by using linear projection; repeatedly performing the linear reconstruction on pixel class label vectors in the image localwindow by using the modified color reconstruction coefficients, and estimating to acquire local reconstruction errors; accumulating the local reconstruction errors to acquire a global reconstruction error; building an interactive image segmentation model of the multiple foreground targets; and performing cluster analysis on the same class of pixels which are labeled by a user to acquire a clustering center; acquiring a group of polynomial functions by adopting regression estimation by taking the clustering center as a training sample; mapping the unlabelled pixels by using the polynomial functions to acquire an initial solution; solving the segmentation model; and determining the class attribution of the unlabelled pixels, and outputting a segmentation result. The interactive image segmentation method has a wide application prospect, and the problem that the multiple foreground targets are difficult to segment simultaneously in the prior art is solved.
Owner:INST OF AUTOMATION CHINESE ACAD OF SCI
Superfine coal dust oxygen-enriched combustion technology and system
InactiveCN103234198AIncrease burnoutAlleviate the problem of slagging on the heating surfaceCombustion using gaseous and pulverulent fuelCombustion using liquid and pulverulent fuelTrappingFlue gas
The invention discloses a superfine coal dust oxygen-enriched combustion technology and system in the technical field of energy conservation and emission reduction. The technology comprises the following steps of: preparing superfine coal dust with an average particle size of less than 20 microns, and burning in an oxygen-enriched environment with overall concentration kept at 27-35% (v / v); extracting part of the hot flue gas in a flue at the rear part of a deduster; and circularly preparing superfine coal dust by taking the extracted flue gas and oxygen as combustion-supporting mediums again. According to the technology and system disclosed by the invention, the superfine coal dust is applied to the oxygen-enriched combustion technology, and the advantages of the two are effectively combined to realize an effect of using advantages and bypassing disadvantages; and the superfine coal dust oxygen-enriched combustion technology finishes efficient trapping of CO2 and is a new coal dust combustion technology with good combustion property and better pollutant discharge performance, and surely becomes an emerging technology for pollutant cooperative removal deserving vigorous promotion.
Owner:SHANGHAI JIAO TONG UNIV
Optimal control method based on data-driven single network structure
InactiveCN105487376AReduce the impact of errorsImprove adaptabilityAdaptive controlState variableNetwork structure
The invention discloses an optimal control method based on a data-driven single network structure. By continuously updating training samples and adding to an LS-SVM model, the partial derivative of a system state variable x for the optimal performance index function is approximated on line, and then the optimal control law is directly obtained by calculation according to the optimal control law expression. In this way, the controller network is saved, so that the structure becomes simpler. In addition, the calculation procedures involved in each iteration of the traditional computing method are reduced, thereby increasing the execution speed.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Decryption and recovery method of document object model (DOM) raster data
InactiveCN103093414AImprove reliabilityImprove usabilityImage data processing detailsRecovery methodComponent Object Model
The invention discloses a decryption and recovery method of document object model (DOM) raster data, and belongs to the field of geography information safety. The decryption and recovery method of the DOM raster data comprises the following steps of (1) a key generation process: confirming a data range, confirming data conversion amount, computing linear and nonlinear transformation parameters; (2) a decryption process: reading a key file, processing each pixel according to the key file, and saving raster data after decryption; and (3) a recovery process: opening the raster data after decryption, and processing each pixel in a circular mode. Aiming at a safety protection problem of the DOM raster data, the decryption and recovery method of the DOM raster data is capable of carrying out decryption to the data according to the key under the premise of ensuring that no change occurs in a data topological relation, and the data after decryption can be recovered according to the key. The decryption and recovery method of the DOM raster data has the advantages of having randomness, gradual change property, reversibility and the like, improving reliability of decryption of the DOM raster data, completing a theory and method system of geographic information safety protection, and being applicable to public release of the DOM raster data, and the like.
Owner:NANJING NORMAL UNIVERSITY
SAR back projection imaging method based on feature distance subspace
InactiveCN104155653ATheoretical perfectionEasy to operateRadio wave reradiation/reflectionPrincipal component analysisBack projection
The invention discloses an SAR back projection imaging method based on feature distance subspace. The method is on the basis of distance history vector, and the concept of distance history vector match degree is put forward from the angle that whether a conventional BP algorithm can focus; and then, based on minimum mean square error criterion and principal component analysis principle, the concept of feature distance subspace is put forward in the SAR imaging field. The measured distance history vector is optimally corrected in the feature distance subspace, so that measurement noise is suppressed very well, the distance history vector match degree is improved, compensated phase position is subjected to accurate estimation, and finally, good focusing effect is obtained. The SAR back projection imaging method is suitable for SAR two-dimension imaging and three-dimensional imaging of any system, and thus the method has very good popularization performance. Finally, since correcting the distance history vector in the feature distance subspace is a linear operation, the method has very high operability.
Owner:UNIV OF ELECTRONIC SCI & TECH OF CHINA
Cyber-physical fusion-oriented building information model (BIM) expansion method
ActiveCN107506548ARich theoretical and methodological systemExpand application spaceGeometric CADSpecial data processing applicationsDecision-makingVirtual space
The invention discloses a cyber-physical fusion-oriented building information model (BIM) expansion method. The method is used for building construction and operation and maintenance process measurement and control based on a BIM, construction of application software platforms of augmented-reality human-machine interaction and the like and the like, and realizes coupling, linking and state consistency between BIM entities in virtual space and physical building entities in real space. According to the method, a BIM framework based on an IFC (Industrial Foundation Class) is expanded on the basis of conception and thinking of cyber-physical systems (CPS), four new object entities are defined inside the traditional BIM framework, the four objects are associated with other building objects (such as doors) in the BIM framework through related connection mechanisms, the virtual building objects are enabled to have perception, decision-making, control and animation ability, and dynamic interaction to physical building objects is realized. The method accords with application requirements of BIM technology for future dynamic interaction processes, and is compatible with mainstream BIM technology standards.
Owner:TSINGHUA UNIV
Flow unit information classification and identification method based on support vector machine algorithm
PendingCN110717301AStrong correlationHigh degree of fitCharacter and pattern recognitionDesign optimisation/simulationAlgorithmTest sample
The invention belongs to the technical field of petroleum and natural gas exploration and development, and discloses a flow unit information classification and identification method based on a supportvector machine algorithm, which comprises the following steps: determining a sample set, preprocessing data, and finishing normalization processing of sample data by adopting a mapminmax function inMATLAB; carrying out model construction and parameter optimization by adopting C-SVM classification technology; and predicting and checking the established prediction model by using the test sample.The flow unit information classification and recognition method based on the support vector machine algorithm is high in nonlinear problem processing capacity. The method has high goodness of fit, thereliability of flow unit research carried out by using a support vector machine algorithm is high, and the method has a certain reference value for residual oil potential prediction. The support vector machine algorithm has the advantages of high precision, high speed and high universality when solving the linear or nonlinear problem of a research target related to multiple factors.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
Method for testing residual stress distribution of ram casting for large-scale machine tool by blind hole method
ActiveCN105067167ALow costSimple calculationForce measurementNumerical controlStructural engineering
The invention discloses a method for testing residual stress distribution of a ram casting for a large-scale machine tool by a blind hole method. The method comprises the following steps of taking out the ram casting from a casting mold; selecting a residual stress test surface; arranging residual stress test points; testing strain caused by residual stress of each test point; analyzing and integrating strain data obtained by testing; and calculating the value of residual stress of each point to obtain residual stress distribution. The method is low in cost, simple in calculation, high in measurement precision, perfect in theory and mature in technology, does not require expensive equipment, and evaluates the residual stress distribution accurately and scientifically. With the method, the residual stress distribution of the ram casting can be tested and obtained, so that stress concentration portions and weak portions of the ram structure can be determined, and reference data can be provided for design and optimization of the ram casting forming technology.
Owner:桂林市佳隆机械制造有限公司
Method for determining initial orbit of spatial target under constraint of virtual coplanar condition
ActiveCN109612438ATheoretical perfectionVarious methodsPicture interpretationSurveyorMeasurement problem
The invention discloses a method for determining an initial orbit of a spatial target under the constraint of a virtual coplanar condition, and belongs to the field of surveying and mapping science and technology. The method comprises the steps of extracting a fixed star trail equation based on a star map, and carrying out motion compensation on an observation platform by utilizing a six-parameteraffine transformation model to acquire image plane coordinates of a target star under a virtual static observation condition; by utilizing an imaging geometrical relationship between the observationplatform and the target star which are coplanar under the virtual static observation condition, building a virtual static coplanar condition observation model, and calculating a spatial position of the target star; and establishing a time-space domain combined initial orbit determination algorithm, and calculating the number of target orbits. The virtual static coplanar condition observation modelconverts the "dynamic-to-dynamic" orbit estimation problem into the "static-to-dynamic" satellite dynamic photography measurement problem, and solves the difficult problem of no distance measuring data in detection of a space-based visible light camera (SBV).
Owner:SUZHOU ZHONGKE IMAGE SKY REMOTE SENSING TECH CO LTD
Positioning method and positioning system for breast lesion puncture point
ActiveCN102860834ASophisticated calculationTheoretical perfectionRadiation diagnosticsPuncture BiopsyDigital mammography
The invention discloses a positioning method and a positioning system for a breast lesion puncture point. The positioning method comprises the following steps of: acquiring breast images shot at two different angles by a bulb tube of an X-ray digital mammography machine, and establishing a lesion projection light cone to generate a puncture guide body model. The maximum cross section is obtained by using a plane cross section guide body of a detector which is parallel with the X-ray digital mammography machine, and a point which is far away from the edge is picked on the maximum cross section to serve as the puncture point. The puncture point determined by the positioning method is located in a breast lesion, and is remote from the edge of the lesion, and more enough lesion tissues can be obtained when puncture biopsy is performed. Compared with other puncture point coordinate computing methods, the positioning method for the breast lesion puncture point has the advantages that puncture point computation is exquisite; the theory is perfect; the result accuracy is higher; the operation is simple; and the computing speed is high.
Owner:SHENZHEN ANKE HIGH TECH CO LTD
Residual moment measuring device and method of inertial device based on three-dimensional air flotation
ActiveCN110542439AReduce calculationHeavy calculationApparatus for force/torque/work measurementMeasurement deviceWireless transmission
The invention provides a residual moment measuring device and method of an inertial device based on three-dimensional air flotation, belonging to the technical field of detection. An on-stage system and an under-stage system in the device are connected through a wireless transmission system; the under-stage system comprises an under-stage data collecting and processing system, a server, a cabinetbox and an air supply system; the on-stage system comprises a power supply system, an inertial execution mechanism control system, an inertial execution mechanism to-be-tested product, an on-stage data collecting and processing system, a residual moment test system, a vibration isolating and supporting system, and a vacuum control system, the residual moment test system consists of an air flotation rotary table, a high-precision sensor device and an anti-overturning and protective device, and the high-precision sensor device is separately arranged in a vertical direction of the air flotation rotary table and in a horizontal direction outside the air flotation rotary table. The device can simulate orbit work of a satellite platform, provides a simulated spatial mechanical environment, outputs residual moment in real time, can be used for directly measuring multiple inertial devices, is low in calculation amount, and has high precision.
Owner:HARBIN INST OF TECH
Urban electric bus driving condition construction method based on improved K-means
ActiveCN110807552AReflect driving characteristicsAccurately reflect driving characteristicsInternal combustion piston enginesForecastingTime informationRoad traffic
The invention discloses an urban electric bus driving condition construction method based on improved K-means, and the method comprises the following steps: A, carrying out the investigation of bus routes in a city, and screening a plurality of typical bus routes; step B, adding a sensor on the selected bus to obtain required data: time information-vehicle running speed; step C, preprocessing theacquired data; step D, dividing a short stroke and calculating a characteristic value; e, performing data dimension reduction through principal component analysis; step F, carrying out improved binaryK-means clustering analysis; and step G, selecting similar working conditions and synthesizing driving working conditions. An analysis result shows that the driving condition of the electric motor coach in a certain city established based on the improved binary K-means algorithm can more accurately reflect the characteristics of urban road traffic.
Owner:HEFEI UNIV OF TECH
Single-row denominator subtraction reducer
InactiveCN107514443ATheoretical perfectionGeometric CADToothed gearingsTransmission ratioElectrical and Electronics engineering
The invention relates to a planet row gear structure reducer which comprises a mechanical system, a lubricating system and the like. The reducer includes a single-row bevel gear planet row or a single-row variable-line-speed planet row with the characteristic parameter close to 1.0, wherein the motion characteristic equation of the single-row bevel gear planet row or the single-row variable-line-speed planet row is that Nt-axNq-(1-a)xNj=0. The reducer has a specific transmission path, the transmission path or a heterogeneous type of the transmission path with the corresponding transmission ratio formula having the denominator subtraction property is selected, the value of the planet row characteristic parameter is adjusted by selecting the planet row kind structure type and adjusting the number of teeth of three parts of the planet row, the denominator subtraction property can be utilized so that the transmission ratio formula denominator absolute value can be minimized, the member absolute value is not minimized, the transmission ratio absolute value is maximized, and therefore the reducer with the large transmission ratio is achieved. The reducer can serve as an independent reducer and accelerator or serve as a part in a transmission machine.
Owner:罗灿
Prevention and treatment method for water inrush and sand bursting of thick surface soil thin bedrock drilling shaft
ActiveCN109989756AAvoid secondary damageEnhanced strength and water resistanceShaft liningSoil scienceBedrock
The invention provides a prevention and treatment method for water inrush and sand bursting of a thick surface soil thin bedrock drilling shaft. The method comprises the following steps: throwing: throwing bagged stones or bricks into the shaft with water inrush and sand bursting, and throwing stone ballast with the particle size of 20-40mm into the shaft with water inrush and sand bursting when the water level rises slowly or is stable; grouting: forming a plurality of exploration injection holes in the periphery of the shaft with water inrush and sand bursting for grouting, and forming a grouting curtain; freezing: forming a plurality of freezing holes around the shaft with water inrush and sand bursting to freeze the thick surface soil thin bedrock around the shaft with water inrush andsand bursting and form a freezing wall; repairing: draining and dredging the shaft with water inrush and sand bursting, and repairing the damaged well wall; and prevention: sleeving an inner sleeve well wall in the shaft with water inrush and sand bursting. The prevention and treatment method takes repair and prevention as the principle, the aim of stability of the damaged drilling shaft for a long time is achieved, and the social and economic benefits are remarkable.
Owner:ANHUI UNIV OF SCI & TECH
Deep-hole coal blasting method for steeply dipping coal seam
ActiveCN111551084AAvoid collapsing holesReduce clamping effectBlastingTEX-explosiveMining engineering
The embodiment of the invention relates to the technical field of coal mining engineering, in particular to a deep-hole coal blasting method for a manless working face of a steeply dipping coal seam.The deep-hole coal blasting method comprises the steps: at the positions of solid coal walls of an upper-zone roadway and a lower-zone roadway at the depth away from a coal working face by single-timeblasting cyclical footage, a plurality of blast holes with predetermined depths are drilled obliquely inwards from the coal walls, wherein the multiple blast holes are consistent with the dip angle of the coal seam; after drilling is completed, casings are sent into drill holes within the predetermined time; according to the pre-calculated single-hole explosive load and a determined explosive loading mode, explosive coils are loaded into predetermined positions of the blast holes, explosion propagation lines are led out to be connected to an initiation point, and the blast holes are blocked through blocking gun clay; and an initiator is started, the explosive coils in the multiple blast holes are initiated simultaneously, and coal bodies at the single-time blasting cyclical footage depthare guided to move to be broken through a plurality of blasting free faces to achieve coal dropping. The deep-hole coal blasting method can be suitable for mining the steeply dipping coal seam and provides a comprehensive theory and a practical guiding basis for later production and mining of the steeply dipping coal seam.
Owner:NORTH CHINA INST OF SCI & TECH
Method for measuring size of caved body obtained through non-sill-pillar sublevel caving mining
ActiveCN103471537AStructural parameter optimizationReduce the workload of samplingSpecific gravity measurementMineralogySpelunking
The invention provides a method for measuring the size of a caved body obtained through non-sill-pillar sublevel caving mining. The size of the caved body is determined according to the size of an ore body which is exploded and the one-time coefficient of volumetric expansion. The method comprises the steps of firstly, measuring the sublevel height, the access space, the ore caving pace, the width of the cross section of a tunnel and the height of the cross section of the tunnel respectively, and working out the size of the ore body which is exploded according to stope structure parameters; secondarily, conducting site measurement and laboratory measurement respectively, determining the volume weight of discharged ore scattered bodies and the volume weight of the ore body which is exploded, and working out the limit loose coefficient of the discharged ore scattered bodies; then, according to the ore drawing principle, conducting empirical value taking on the secondary loose coefficient of ore inside the caved body, and determining the primary loose coefficient of the caved body by combining the limit loose coefficient of the drawn ore scatter bodies; at last, determining the size of the caved body according to the primary loose coefficient and the size of the ore body which is exploded. The method has great significance in further study of caved body forms, structure parameter optimization, stope preparation workload reduction and full recovery of ore resources.
Owner:UNIV OF SCI & TECH LIAONING
Construction method for working condition of semi-trailer tractor
ActiveCN113032898AProcessing speedSmall footprintGeometric CADCharacter and pattern recognitionAlgorithmPrincipal component analysis
The invention provides a semi-trailer tractor working condition construction method, which comprises the following steps: dividing market fields by using driving characteristics of various semi-trailer tractors, collecting driving data of the semi-trailer tractors in a target field, and establishing a kinematics fragment database in the field; calculating characteristic values of all kinematics fragments, and obtaining dimensionless indexes after standardization processing; performing de-correlation and dimension reduction processing on the dimensionless indexes by using a principal component analysis method to obtain principal component values of all kinematics fragments; clustering all the kinematic fragments according to the principal component values, and segmenting the time of the representative working condition according to the proportion of each cluster in all the kinematic fragments; selecting kinematics fragments meeting representative working condition segmentation time from each cluster for random combination, and screening candidate working conditions from all combinations according to speed-acceleration joint probability distribution and characteristic values of all the combinations; and through analogue simulation, selecting one candidate working condition from the two candidate working conditions as a representative working condition of the target field.
Owner:SINO TRUK JINAN POWER
Aramid fiber modification method
ActiveCN113389080AHigh specific surface areaHigh aspect ratioPlastic recyclingSynthetic cellulose/non-cellulose material pulp/paperPulp (paper)Paper sheet
The invention discloses an aramid fiber modification method. According to the aramid fiber modification method, aramid chopped fibers is modified by using an aramid nanofiber dispersion liquid so as to construct a multi-level micro / nano coarse structure on the smooth surface of the aramid fibers to obtain aramid nanofiber-coated aramid composite fibers which have high specific surface area, high mechanical strength and excellent temperature resistance, can overcome the problems of smooth and hydrophobic surface, strong inertia, few active groups and the like of a traditional chopped fiber and become an optimal construction unit for preparing a high-performance composite material. High-performance aramid paper is prepared by taking the obtained aramid nanofiber-modified aramid chopped fibers as a single raw material, and aramid pulp fiber or aramid fibrid does not need to be prepared, so the problems of loose paper structure, poor interface bonding force, low mechanical strength and compression strength and the like caused by large component dimension difference of the aramid paper are avoided; and the prepared aramid paper has a compact paper structure, high strength, high modulus and excellent compression strength, and is expected to be applied to the fields of advanced electrical insulation, structural weight reduction honeycomb materials and the like.
Owner:SHAANXI UNIV OF SCI & TECH
Turnover-type plug valve
InactiveCN109386630ATheoretical perfectionMeet engineering needsMultiple way valvesEngineeringMechanical engineering
The invention relates to a plug valve. A cylindrical plug body or a conical plug body does unidirectional turnover movement other than reciprocating rotation relative to the valve body; in relative turnover, an opening-closing pair is formed by the plug body and through holes of the plug body which are capable of mutually forming opening-closing movement on the same radial-direction cross sectionand the valve body and through holes of the valve body which are capable of mutually forming opening-closing movement on the same radial-direction cross section, the opening-closing pair can form periodic opening-closing movement in turnover, and is used for periodic opening-closing control of fluid, and the turnover-type plug valve can have one or more opening-closing pairs. The turnover-type plug valve can also be designed to a multi-pair synchronous turnover-type plug valve and a distribution turnover-type plug valve.
Owner:罗灿
Positioning method and positioning system for breast lesion puncture point
ActiveCN102860834BSophisticated calculationTheoretical perfectionRadiation diagnosticsPuncture BiopsyDigital mammography
The invention discloses a positioning method and a positioning system for a breast lesion puncture point. The positioning method comprises the following steps of: acquiring breast images shot at two different angles by a bulb tube of an X-ray digital mammography machine, and establishing a lesion projection light cone to generate a puncture guide body model. The maximum cross section is obtained by using a plane cross section guide body of a detector which is parallel with the X-ray digital mammography machine, and a point which is far away from the edge is picked on the maximum cross section to serve as the puncture point. The puncture point determined by the positioning method is located in a breast lesion, and is remote from the edge of the lesion, and more enough lesion tissues can be obtained when puncture biopsy is performed. Compared with other puncture point coordinate computing methods, the positioning method for the breast lesion puncture point has the advantages that puncture point computation is exquisite; the theory is perfect; the result accuracy is higher; the operation is simple; and the computing speed is high.
Owner:SHENZHEN ANKE HIGH TECH CO LTD
Airlift reactor for treating soybean oil refining waste water by viscid trichosporon cutaneum
ActiveCN108545837ASimple structureTheoretical perfectionWater treatment parameter controlBiological treatment apparatusWater bathsChemical industry
The invention relates to an airlift reactor for treating soybean oil refining waste water by viscid trichosporon cutaneum, and belongs to the technical field of waste water treatment. Aiming at the features of the soybean oil waste water, the airlift reactor which can not only realize the soybean oil refining waste water treatment and resource utilization but also obviously improve the waste watertreatment efficiency for treating soybean oil refining waste water by viscid trichosporon cutaneum is designed. A water bath jacket is coated outside a reaction tank; a heat insulation water inlet and a heat insulation water outlet are formed in the water bath jacket; a tube body is arranged inside the reaction tank body through a support block, wherein the upper part and the lower part of the tube body are communicated with the reaction tank body; the upper half part of the tube body is a low pH region; the lower half part is a high PH region; an air pipe passes through the reaction tank body and the air outlet of the tube body is arranged between the low PH region and the high PH region; in addition, the air outlet is upward; a gas distributor is arranged in an air outlet position of the air pipe; a cyclone plate is arranged at the upper end of the tube body. The air is used as thrust for realizing a multi-flow-phase reactor realizing the water circulation flowing and no need of mechanical stirring and pump lifting. The airlift reactor has the characteristics of simple structure, low energy consumption and the like, and can be widely applied to various fields of biological engineering, energy chemical industry, environment protection and the like.
Owner:NORTHEAST DIANLI UNIVERSITY
Maintenance effect modeling method considering maintenance negative effect
ActiveCN110909442AComplete systemPerfect reliabilityDesign optimisation/simulationMaintenance strategySystem maintenance
The invention provides a maintenance effect modeling method considering a maintenance negative effect. The method comprises the following steps of 1, determining a system reliability model; 2, quantitatively describing a maintenance effect; 3, establishing a system maintenance effect model; 4, carrying out application and analysis of a maintenance effect model: applying the established maintenancemodel considering the maintenance effect to a maintenance decision, performing the maintenance decision on the system by adopting a maintenance strategy limited by a fault threshold, and analyzing amaintenance decision result. By means of the steps, the maintenance effect is fully considered in the maintenance modeling process, quantitative calculation and analysis are conducted, maintenance decisions are more scientific and accurate, then the optimal efficiency-cost ratio of the system is achieved, and operation and maintenance work of enterprises is facilitated.
Owner:BEIHANG UNIV
Combining of light rare earth ion absorbing material
InactiveCN103157443AEasy to recycleImprove adsorption capacityOther chemical processesWater/sewage treatment by sorptionEpoxyCross-link
The invention discloses a light rare earth ion absorbing material. The light rare earth ion absorbing material is prepared by the following primary raw materials: a carrier is 100 parts of a plant fiber (such as a wood fiber and a ramie fiber), an absorbing base is various kinds of condensed tannins (such as a oak tannin, a persimmon tannin and a pericarpium granati tannin). The light rare earth ion absorbing material comprises, by mass, 100-1000 parts of 0.8% oak tannin solution, or 100-1000 parts of 0.7% persimmon tannin solution, or 100-1000 parts of 0.8% larix gmelinli tannin solution, or 100-1000 parts of 0.5% pericarpium granati tannin solution. A cross linking agent is aldehydes (such as methanal and glutaraldehyde) or epoxy group (like dual-epoxy propane). The light rare earth ion absorbing material further comprises, by mass, 50-500 parts of 10% glutaraldehyde solution or 50-1000 parts of 3% dual-epoxy propane solution. The carrier and the absorbing base are cross linked in an acid solution, and an environmental-friendly material capable of absorbing the light rare earth ion is obtained. A maximum absorbing quantity is 427.0mg / g. Due to the fact that the light rare earth ion absorbing material only contains carbon (C), hydrogen (H) and oxygen (O) elements, after high temperature burning, recovering of the rare earth ion is convenient.
Owner:SICHUAN NORMAL UNIV
Inertial device residual moment measurement device and method
ActiveCN110542440AHeavy calculationSimple structureApparatus for force/torque/work measurementWireless transmissionMeasurement device
The invention provides an inertial device residual moment measurement device and method and belongs to the technical field of detection. The device comprises an on-platform system, an off-platform system and a wireless transmission system, wherein the on-platform system and the off-platform system are wirelessly connected through the wireless transmission system; the off-platform system comprisesan off-platform data acquisition and processing system, a server and a cabinet box; and the on-platform system comprises a power supply and gas supply system, an inertial execution mechanism control system, an inertial execution mechanism to-be-measured product, an on-platform data acquisition and processing system, a residual moment testing system, a vibration isolation and support system and a vacuum control system, and the residual moment testing system comprises an air flotation platform, air feet and a high-precision sensing device. On-orbit work of a satellite platform can be simulated,a space mechanical environment for simulation is provided, residual moment is output in real time, and the device and the method are applicable to direct measurement of multiple inertial devices and are smaller in calculation of numerical values, higher in accuracy and perfect in theory.
Owner:HARBIN INST OF TECH
Method for correcting geometric distortion of text image
ActiveCN102208025BAchieve correctionSimple thinkingCharacter and pattern recognitionNonlinear deformationAlgorithm
Owner:INST OF AUTOMATION CHINESE ACAD OF SCI
Solidification microstructure refinement method of steel continuous casting slab based on target equiaxed grain size and proportion
ActiveCN110777230BImprove homogeneityImprove compactnessChemical processes analysis/designComputational materials scienceSteelmakingRefining (metallurgy)
The invention relates to the technical field of ferrous metallurgy, and provides a method for refining the solidified structure of a continuously-cast steel billet based on the dimension and proportion of a target isometric crystal. The method is applied to the ferrous metallurgy process. As for molten steel with a certain qualified element, one or more metamorphic elements of a specified quantityare added at one or more nodes of the smelting, refining and continuous casting procedure according to the proportion and dimension of the target isometric crystal corresponding to working conditionparameters in the steelmaking process to cast the molten steel containing the metamorphic elements into a billet, so that the solidified structure of the steel billet is refined. According to the improvement mechanism of the method, particles of a specific type are generated after the metamorphic elements are added, and are used as a heterogeneous nucleation matrix for steel solidification, so that the nucleation density of the core part of the cast billet is improved, and the dimension and proportion of the target isometric crystal are regulated and controlled. By the adoption of the method,quantitative adjustment of the solidified structure of the continuously-cast steel billet is fundamentally achieved, the homogeneity and compactness of the solidified structure of the continuously-cast steel billet can be improved, the defects of solidification segregation, porosity, shrinkage and the like are overcome, and the processability and usability of steel are improved.
Owner:UNIV OF SCI & TECH BEIJING
Test data reduction method for communication coverage of parallel program
InactiveCN112988579ATheoretical perfectionVarious methodsInterprogram communicationSoftware testing/debuggingRelation graphTest efficiency
The invention relates to a test data reduction method for communication coverage of a parallel program, and provides a test data reduction method based on a dominant relationship aiming at the problem of communication coverage test data generation of the parallel program, so that the test efficiency is improved. The method comprises the following specific steps: (1) constructing a domination relation graph of parallel program communication statements based on a domination relation; (2) performing group division on the communication statements according to the domination relation graph to obtain communication statement groups; (3) sorting the communication statement groups; (4) dividing the communication statements in the communication statement group to obtain a communication statement queue; (5) constructing a fitness function of a communication queue based on the fitness function of the communication statement; and (6) generating test data covering the communication queue through a genetic algorithm, thereby achieving the purpose of reducing the test data.
Owner:SHANDONG JIANZHU UNIV
Malignant lymphoma radioactive target molecule imaging agent and/or target therapeutic agent
InactiveCN101797393AStrong penetrating powerRetain high affinityRadioactive preparation carriersAntineoplastic agentsComplementarity Determining Region 1Malignant lymphoma
The invention discloses an application of fusion peptide in the preparation of malignant lymphoma radioactive target molecule imaging agent and / or radioactive target therapeutic agent and a radioactive target molecule imaging agent and / or target therapeutic agent. The fusion peptide is obtained by connecting the framework region 2 (VHFR2 or VLFR2) of a monoclonal antibody heavy-chain variable domain (or light-chain variable domain) with the complementary determining region 1 or 3 (VHCDR1 or VHCDR3) of a heavy-chain variable domain and the complementary determining region 1 or 3 (VLCDR1 or VLCDR3) of a light-chain variable domain, the molecular weight of the fusion peptide is 3-4kDa, the monoclonal antibody is a monoclonal antibody for identifying EB virus surface antigen g p 350 / 220 antigenic determinant, and the tumor is malignant tumor caused by the EB virus. The radioactive immune-imaging agent or therapeutic agent prepared in the invention has the advantages of small molecular weight, high tumor penetrating power, good targeting, high tumor accumulation, fast removing performance in blood, no obvious radioactive distribution in non-target organs away from tumor such as the liver and spleen, no immunogenicity, safety and the like.
Owner:WEST CHINA HOSPITAL SICHUAN UNIV
Asphalt mixture accumulation type steam motion parameter detection device and method
InactiveCN110455665AFast adsorption rateShort test timeGas dispersion analysisLiquid dispersion analysisMotion parameterProduct gas
The invention discloses an asphalt mixture accumulation type steam motion parameter detection device comprising a closed cavity, a magnetic suspension balance, a sample barrel, a constant-temperaturecirculating bath A, a steam supply system and a vacuum pump; the magnetic suspension balance and the sample barrel are both arranged in the closed cavity, and the sample barrel is suspended on a hookbelow the magnetic suspension balance; the constant-temperature circulating bath A is arranged on the periphery of the closed cavity and is used for controlling the temperature in the closed cavity; the sealed cavity is provided with a gas inlet and a gas outlet, and the gas inlet and outlet respectively communicate with the steam supply system, the vacuum pump and a pressure return pipeline through a first pipeline. The invention further discloses an asphalt mixture steam motion parameter detection method, and the steam motion parameter in the asphalt mixture can be accurately and rapidly determined. The device and the method in the invention have the beneficial effects that the "air permeability" and "water retention" capability of the asphalt pavement under the actual service environment can be accurately and quickly quantified; and the rationality, the test precision and the test time of the test method are all remarkably improved compared with the existing test method.
Owner:WUHAN UNIV OF TECH
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