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Electric network thunderstorm damage distribution determination method
ActiveCN101261616ASolve the problem that it is impossible to clearly determine the distribution of lightning damage in the power gridSimple methodData processing applicationsMeasurement devicesLightning strikeStatistical analysis
Owner:WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST +1
Clothes making method based on three-dimensional to two-dimensional clothes pattern seamless mapping
ActiveCN104036532ASimple and intuitive design approachThe effect is beautiful and overall2D-image generationSpecial data processing applicationsProcess engineeringDigital printing
The invention discloses a clothes making method based on three-dimensional to two-dimensional clothes pattern seamless mapping. The clothes making method based on the three-dimensional to two-dimensional clothes pattern seamless mapping comprises the following steps: constructing a three-dimensional clothes model, and establishing a mapping relationship between the three-dimensional clothes model and a two-dimensional sample plate mesh model; designing a clothes pattern on the surface of the three-dimensional clothes model; calculating a pattern on the seam allowance of a two-dimensional sample plate; and carrying out digital printing, cutting and sewing of the two-dimensional sample plate to make real clothes. According to the clothes making method based on the three-dimensional to two-dimensional clothes pattern seamless mapping, the problems that registration and grid matching are complex, and seamless splitting can not be realized since the pattern continuity of the clothes is damaged in a conventional clothes making process at present are solved, the pattern of the clothes is more beautiful and intact when people wear the clothes, cloth is saved, and time and cost for registration and grid matching in the clothes making process are respectively shortened and reduced. The clothes making method based on the three-dimensional to two-dimensional clothes pattern seamless mapping has the advantages of specific algorithm, friendly interface and robust result.
Owner:杭州素构时装有限公司
'Four-step' large-scale method for locating and detecting deep hydrothermal ore deposits or ore bodies
ActiveCN107346038AEliminate the influence of unfavorable factors such as large electromagnetic interferenceWide range of applicationsGeological measurementsLocation predictionMaterials science
The invention discloses a 'four-step' large-scale method for locating and detecting deep hydrothermal ore deposits or ore bodies. Deep ore deposits or ore bodies are directly located and detected through four stages, namely, ore deposit forming rule research, fine analysis of ore forming structure, altered lithofacies mapping and structural geochemical fine exploration, and geophysical deep detection and concealed ore location prediction. The method is based on a large-scale (1:200-1:50000) progressive deep-buried ore deposit or ore body location and detection technology integrating 'ore deposit model prediction, structure prediction, altered lithofacies mapping and structural geochemical fine exploration, and geophysical exploration'. A systematic deep ore exploration technology is realized.
Owner:KUNMING UNIV OF SCI & TECH
Device and method for carrying out subject training based on virtual reality
InactiveCN109920298AReduce the burden onSave time and costCosmonautic condition simulationsSimulatorsOperating instructionOperational costs
The invention provides a device and method for carrying out subject training based on virtual reality. The device is realized through the following components: a virtual reality driving module for simulating a real car for a user to carry out simulated driving and subject training, a subject training module for splitting the subject training into a certain quantity of single trainings, a point position teaching module for teaching a student through a passing method of each subject and calling a pre-stored key operating instruction at a key point, and a scoring module for scoring a driving process of the user according to a subject examination scoring rule and judging whether a subject examination passes or not. The device and method, provided by the invention, have the beneficial effects that point positions are clear and the method is clear; the burdens of the students and trainers are reduced through a plurality of types of repeated learning, and contradictions between the students and the trainers are avoided; the learning time of the students in real cars on site is shortened and the operation cost of driver training schools and the trainers is greatly reduced; the subject is split into a plurality of single courses and each single course is split into a plurality of courses, so that the school effect of the students is improved.
Owner:珠海超凡视界科技有限公司
Method for predicting lightning motion by space density clustering
The invention relates to a method for predicting lightning motion by space density clustering. The method comprises the following steps of: processing automatic lightning monitoring data through a computer, establishing a clustering analysis database, combining a geographic information system (GIS) to establish an analysis platform, performing clustering analysis on lightning data at different moments by establishing a density clustering algorithm model, setting lightning data sample screening conditions in the database, describing basic parameters of lightning density to acquire lightning sample data according to a time sequence and classifying according to a time period; establishing a lightning data space position relationship table through lightning data points and distance values; determining position characteristic points of different lightning storms; and calculating motion direction and speed along with displacement change during time lapse according to the position characteristic points of the lightning storms, and predicting positions of lightning storms to be generated in the next time period. The invention has the advantages that: the method has novel conception, a method for processing the lightning data is advanced and reasonable, and the authenticity of the lightning motion can be reflected.
Owner:WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST
Method for controlling flexible satellite based on feature model
ActiveCN102033491ACharacterize the rate of changeSolve bottlenecksAdaptive controlAttitude controlModel parameters
The invention relates to a method for controlling a flexible satellite based on a feature model, which is characterized in that the time dimension, the sampling time and the parameters M and m are determined according to the kinetic equation of the flexible satellite; the coefficient range of the feature model is determined according to each obtained variable; the parameters of the feature model are identified by utilizing a gradient method; and a control law is designed according to the coefficients of the feature model obtained through the identification, and the attitude angle of the flexible satellite is controlled through the kinetic equation that the control law is fed back to the flexible satellite. The method has the advantages that the time dimension and the sampling period of the flexible satellite are introduced; the change rate of the flexible satellite is depicted; the bottleneck problem of the feature modeling of the flexible satellite is solved; the expression of the parameter range of the feature model of the flexible satellite is provided; the parameter property of the feature model is qualitatively researched; the boundary of the parameters of the feature model is relative to the sampling period, the modeling error, the system order and the change rate of the system from the given parameter range; and the theoretical foundation of the self-adaptive control based on the feature model is laid for the flexible satellite. The method is suitable for the feature model of the attitude kinetics of an aircraft so as to lay the foundation for the aircraft based on the attitude control of the feature model.
Owner:BEIJING INST OF CONTROL ENG
Smart substation equipment visualized programming method
ActiveCN103823666AImprove reliabilityRealize visual debuggingSpecific program execution arrangementsCode generationGraphics
The invention discloses a smart substation equipment visualized programming method which is characterized by including visualized programming and imaging and visualized debugging. The visualized programming includes the steps of 11), designing an operation logic diagram of a relay protecting device according to the protecting control requirements of smart substation equipment, and checking the completeness of the logic diagram; 12), designing a visualized programming project describing the function of each equipment of a whole substation according to the operation requirements of different equipment; 13), using a component diagram drawing device to operate the logic diagram so as to complete the programming of a device operation program; 14), using cross-indexing to verify data input-output validity among diagrams in visualized programming; 15), using a coding code generating method to generate a program source code C file; 16), using a development tool compiler to generate the final target program. By the method, imaging programming of the relay protecting device, a measuring and control device and other smart equipment can be achieved.
Owner:NARI TECH CO LTD
Natural protected area system integration and boundary demarcation method
InactiveCN110852532ASolve the problem of planning directionClear methodForecastingNatural protected areasConstruction management
The invention discloses a natural protected area system integration and boundary demarcation method. The method comprises the following steps: (1) determining a protected area integration and mergingprinciple; (2) for a region to be integrated and merged, constructing an ecological suitability, cultivated land suitability and construction suitability evaluation index system, and performing indexstandardization processing and weight assignment; calculating a suitability comprehensive index of each type of land, constructing a conflict pattern spot suitability land type discrimination matrix for qualitative evaluation, and drawing a suitability land type spatial layout map; (3) selecting evaluation reference elements for protected area boundary optimization; (4) evaluating resource background characteristics and carrying out primary aggregation optimization; (5) extracting an existing element and resource base aggregation result according to the protected area heritage resource characteristics to carry out intersection optimization; and (6) linking and coordinating the result with a construction management condition, and delimiting a new protected area boundary. According to the method, the problem of conflict patches of the natural reserve can be solved, and a scientific, reasonable, clear and definite natural reserve boundary is formed.
Owner:ZHEJIANG UNIV
Air-conditioning load reduction method based on temperature adjustment means and SOC (State of Charge) parameter modeling
InactiveCN109842117AControl energy consumptionReliable principlePower network operation systems integrationAc network voltage adjustmentLower limitTemperature conditioning
The invention provides an air-conditioning load reduction method based on temperature adjustment means and SOC parameter modeling. The method comprises the following steps that S1) an air conditioningload-room temperature basic model is established; S2) an air conditioner is virtualized into an energy storage component, a concept of SOC parameter is introduced, and a charge parameter energy-storage model of the air conditioning component based on the SOC parameter is established; S3) an air-conditioning load reduction model based on the temperature adjustment means and SOC parameter modelingis established; and S4) when there is capacity lack in the power grid in summer, an air conditioning load which is expected to be reduced is input to the air-conditioning load reduction model, and indoor temperature upper / lower limit, load reduction lasting time and advanced cooling time prescribed by air-conditioning load reduction control are determined, and the maximal value that can be reducedof the air conditioning load is calculated. Thus, the power grid load can be reduced without influencing the comfortableness of users.
Owner:JIANGSU ELECTRIC POWER CO
Scheduling method and system for flexible bus system
InactiveCN108765948AFlexible adjustmentImprove efficiencyDetection of traffic movementTraffic capacityTraffic network
The invention provides a scheduling method and system for a flexible bus system. The method comprises: step one, road network data are initialized and stations and stops are generated by clustering; step two, a traffic flow network is constructed based on station distribution, a traffic flow is calculated, one bus is opened if the traffic flow is larger than a set traffic flow threshold, and otherwise, buses wait and do not go anywhere; step three, when the bus is opened, the bus uses an initial driving route as a current driving route and departs by starting with a starting point; step four,the bus is driven along the current driving route, determines whether an insertion constraint condition is met when receiving a riding request from a passenger, receives the riding request and uses anew driving route as the current driving route if the insertion constraint condition is met, and otherwise, refuses the riding request; and step five, when the bus is driven to the destination of thecurrent driving route, the step two is performed again. Therefore, the driving route can be adjusted flexibly based on a real-time riding request; the scheduling cost is minimized while the service quality is ensured; and the urban traffic efficiency is improved.
Owner:XIAMEN UNIV +1
Safe clothes drying machine with a large space structure
InactiveUS20100083531A1Strong and stable structureReduce manufacturing costDrying gas arrangementsDrying chambers/containersSpatial structureBarrel Shaped
A clothes drying machine, particularly a safe clothes drying machine with a large space structure is disclosed. It includes a clothes drying chamber, a warm air buffer chamber, a fan chamber for heat supply and a controller, wherein the clothes drying chamber, warm air buffer chamber and fan chamber for heat supply are independent parts assembled in turn from top down, and the warm air buffer chamber disposed under the clothes drying chamber is a basin-shaped casing with an opening upwards and an air inlet attached to the fan chamber for heat supply is disposed at the bottom of the basin-shaped casing is provided with a fixing device for clothes drying chamber. The clothes drying chamber according to the present invention is consisted of six elements, that is to say, a barrel-shaped cloth cover, a top bracket for supporting the barrel-shaped cloth cover, a basin-shaped casing making up warm wind buffer chamber, support pieces pinned to the basin-shaped casing and circumference edges of the top bracket, a fan chamber for heat supply as well as bottom support legs. Its advantages exist in large space, safety for use, simple structure and convenience to disassemble, transport and install. It will only take a little time for the consumers to finish installation.
Owner:HU JIEBO
Trajectory-data-based method and system for recommending taxi cruising path
InactiveCN107038886AImprove efficiencyReduce dead-on cruisingDetection of traffic movementRoad networksNetwork data
The invention provides a trajectory-data-based method and system for recommending a taxi cruising path. The method comprises: (1) network data are initialized and regional grid division is carried out; (2) according to historical trajectory data, a historical traffic charge is calculated; (3) with combination of real-time trajectory data, a traffic charge is calculated and updated; (4) when a taxi arrives at an intersection, a sub regional traffic electric field force applied on the taxi is calculated by using the traffic charge obtained at the step (3) based on an urban traffic Coulomb law, a road network data base is inquired to obtain all road sections of the current intersection, and one road section with the smallest included angle with the traffic electric field force direction is used as a recommended road section; and (5) during the driving process at the recommended road section, if the taxis does not pick up any passenger or the passenger gets off the taxi, the step (4) is carried out; and if the taxi picks up a passenger, recommendation is stopped temporarily. According to the invention, the method has a clear idea and the effect is obvious. The empty driving cruising of the taxi can be reduced and thus the earnings of the taxi driver can be increased; and the urban traffic efficiency can be improved.
Owner:XIAMEN UNIV
Laser energy supply unmanned aerial vehicle trajectory optimization and communication power energy distribution method
PendingCN107894712AImprove battery lifeImprove communication performanceAdaptive controlUncrewed vehicleEnergy supply
The invention is suitable for the field of energy distribution technology improvement, provides a laser energy supply unmanned aerial vehicle trajectory optimization and communication power energy distribution method. The energy distribution method comprises the following steps that S1, an unmanned aerial vehicle flies n1 circle around the circuit taking r1 as the radius above a laser source to obtain the enough net energy; S2, the unmanned aerial vehicle flies along the l1l2 tangent line after obtaining the enough net energy; S3, the unmanned aerial vehicle flies n2 circle around the circuittaking r2 as the radius on a sensor to transmit information to the sensor. The double-circle trajectory is selected as an initial trajectory, the optimal unmanned aerial vehicle trajectory and the optimal power distribution on the trajectory are obtained through an algorithm 1 to maximize the throughput, and the throughput can be improved after each iteration. The method is simple and clear, the cruising ability of the unmanned aerial vehicle is effectively prolonged, and the trajectory and the transmission power are reasonably optimized, the throughput of the channel is maximized, and the communication performance of the unmanned aerial vehicle is effectively improved.
Owner:SHENZHEN UNIV
Method for (in-situ) determining steam scatter amount of crops
InactiveCN101413935ANo structural damagePrecise moistureEarth material testingProspecting/detection of underground waterSoil scienceWater balance
The invention discloses a method used for determining the evapotranspiration of crops on site, belonging to the field of agricultural science and technology. The method comprises the steps as follows: data on soil water potential and soil volumetric moisture content of more than 5 layers of soil layers with different depths is measured on site in real time; wherein, at least one layer is below the root layer of the crops; a plurality of data pairs on unsaturated hydraulic conductivity-volume water content of all soil layers above the zero flux plane below the root layer are obtained when the zero flux plane exists below the root layer of the crops, thus obtaining the mathematical relationship of unsaturated hydraulic conductivity-volume water content of all soil layers, therefore, the water flux of all soil layers below the root layer can be obtained, thus determining the evapotranspiration by a water balance method. The method of the invention can be used for determining the evapotranspiration of the crops on site, destroys no soils, is convenient and precise, and can work out the evapotranspiration of the crops at the time interval without observing the zero flux.
Owner:INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
Vegetation loss direction identification method based on multi-remote-sensing index trend
ActiveCN107463775AEasy extractionEliminate distractionsSpecial data processing applicationsInformaticsVegetationVegetation Index
The present invention discloses a vegetation loss direction identification method based on a multi-remote-sensing index trend. The method comprises: calculating a temporal similarity of vegetation indexes between each year and a beginning year by using a JM distance to generate a track of temporal similarity of vegetation indexes; extracting a potential vegetation loss region according to a variation of the temporal similarity of the vegetation index, so as to define a region where the vegetation index is significantly decreased and an impervious surface index is significantly increased as a vegetation loss region; and on this basis, finally determining different vegetation loss directions such as urbanization, desertification and wetland formation according to a water body index and a bare soil index trend feature. In the method, the vegetation change region is determined by using the variation of the temporal similarity, and further, the vegetation loss direction is determined according to multiple remote sensing indexes, without depending on manual intervention for threshold setting, so that the method has the characteristics of high robustness, high classification precision, high automation and storing anti-interference ability, and so on.
Owner:FUZHOU UNIV
Transfer function-based method for determining failure diagnosticability of momentum wheel
ActiveCN102730198ASimple methodClear methodAircraft components testingMomentumSignal transfer function
The invention discloses a transfer function-based method for determining the failure diagnosticability of a momentum wheel. The method comprises the following steps of: (1) on the basis of a momentum wheel model, adding failure influence of each functional module, and establishing a failure model of the momentum wheel; (2) obtaining a transfer function from each failure to output according to the failure model of the momentum wheel; (3) obtaining detectable conditions of various failures by judging whether the transfer functions from the failures to the output are 0 or not according to the transfer functions, obtaining separable conditions of various failures by judging whether the transfer functions corresponding to different failures are linearly dependent or not, and substituting relevant parameters of the momentum wheel to the detectable conditions and the separable conditions to obtain failure diagnosable analytic results of the momentum wheel; and (4) calculating the failure diagnosable analytic results by a diagnosable measurement calculation method to obtain the detectable degree and separable degree of a momentum wheel failure mode and the failure detectable degree and separable degree of components.
Owner:BEIJING INST OF CONTROL ENG
Microwave electric field intensity measuring method and device
PendingCN112098737AHigh measurement sensitivityClear methodElectrostatic field measurementsFrequency bandRydberg state
The invention provides a microwave electric field intensity measurement method and device. The method comprises the steps: setting an atom in a Rydberg state at a position where a local microwave electric field and a to-be-measured signal microwave electric field can be sensed, and then receiving a detection signal of a set frequency band or frequency after the atom is irradiated by detection light through a detector, and further determining the phase of the signal microwave electric field according to the detection signal. The measurement method is based on the quantum superheterodyne principle, the principle is clear and implementation and application are easy; Rydberg atoms are used as a microwave sensitive medium, so that high-sensitivity measurement of the microwave electric field intensity is achieved. The method not only can significantly improve the measurement sensitivity of the microwave electric field intensity, but also achieves the purposes of breaking through existing indexes and improving the measurement precision of the microwave electric field by one order of magnitude, thereby providing a new technical basis for the precision measurement research of the microwaveelectric field intensity.
Owner:BEIJING INST OF RADIO METROLOGY & MEASUREMENT
Method for determining granularity area of asphalt mixture and for evaluating influence factors
ActiveCN104458432AThe experimental method is simpleGood repeatabilityMaterial strength using tensile/compressive forcesGrey correlation analysisTime condition
The invention relates to a method for determining a granularity area of an asphalt mixture and for evaluating influence factors. The method comprises the following steps: drawing isolines on sections of a rutting test specimen, carrying out a rutting test under conditions of different loads and different times, recording initial breaking positions of the isolines of the sections when the test is finished, collecting the depths of the breaking positions, namely the depths of the granularity areas, averaging the depths of the granularity areas of a plurality of sections to determine the granularity area of the asphalt mixture, and analyzing the influence degrees of different loads and temperatures on the depth of the granularity area of the asphalt mixture by using a grey correlation analysis method, to obtain the correlation degree of the granularity area range with load and temperature, namely obtaining the influence of the load and the temperature on the granularity area of the asphalt mixture. The method provided by the invention has the advantages of being simple and easy in test scheme, high in repeatability, clear and exact in conclusion and helpful to mechanical analysis and calculation of asphalt pavements.
Owner:CHANGAN UNIV +1
Optimal scheme selection method for satellite control system on basis of reconfigurable constraints of failures
ActiveCN104656439AImprove troubleshooting capabilitiesReconfigurability Design GuidelinesAdaptive controlConfiguration designControl system
The invention provides an optimal scheme selection method for a satellite control system on the basis of reconfigurable constraints of failures. The method comprises the following steps: (1), providing a minimum feasible configuration set CS according to the observability and the controllability of the satellite control system; (2), performing a reconfigurable design on the satellite control system in response to the minimum feasible configuration set CS, and providing a feasible alternative design-scheme set DS on the basis of reconfigurable index constraints; (3), comprehensively considering the resource constraints of the system, and selecting a design scheme with optimal comprehensive properties from the alternative design-scheme set DS. According to the optimal scheme selection method disclosed by the invention, the reconstitution capability and the resource constraints of the satellite control system in the designing stage can be taken into account, and matched sensors and the type and the number of actuators are provided, so that the optimization of the comprehensive properties of the system under the condition of the reconfigurable constraints is satisfied. The optimal scheme selection method disclosed by the invention is simple and definite, and is suitable for the type selection and the configuration designs of sensors and actuators for the satellite control system in the development stage.
Owner:BEIJING INST OF CONTROL ENG
Magnetizing inrush current discrimination method based on equivalent excitation impedance frequency domain character of transformer
ActiveCN101820166AGood recognition performanceDiscrimination is simple and reliableEmergency protective circuit arrangementsElectrical testingPhysicsSystem structure
The invention discloses a magnetizing inrush current discrimination method based on equivalent excitation impedance frequency domain character of a transformer, which discriminates magnetizing inrush current by the equivalent excitation impedance frequency domain character of the transformer. The discrimination method comprises the steps of: indicating the equivalent excitation impedance of the transformer as Z (n) after N point sampling discretization in one power frequency cycle, wherein the equivalent excitation impedance of the transformer changes along with time; carrying out frequency domain analysis on Z (n) and using the ratio of DC component amplitude absolute Z (0) to fundamental wave component absolute Z (1) and fixed-ratio threshold fixed value Kzd to carry out magnetizing inrush current discrimination. The discrimination method discriminates magnetizing inrush current and short circuit fault current according to the character of the excitation impedance of the transformer in the frequency domain when the magnetizing inrush current occurs to the transformer, which is simple and clear, does not need to consider system parameters and transformer parameters, can be automatically adapted to various types of transformers and the various connecting manners of the transformers , as well as the changes of system operation manner and system structure, reliably lock when inrush current occurs to the only transformer, and can act quickly when fault occurs to a region in which transformer fault and magnetizing inrush current exit simultaneously.
Owner:JIANGSU WISCOM TECHNOLOGY CO LTD
A method for automatically adjust a three-dimensional human face model
InactiveCN109389682AClear methodFriendly interfaceDetails involving processing steps3D modellingComputer animationFace model
The invention discloses an automatic adjustment method of a three-dimensional human face model, comprising the following steps: a three-dimensional scanner obtains a three-dimensional human face modeland obtains a projection map of the three-dimensional human face with texture from three angles; the three-dimensional scanner obtains a projection map of the three-dimensional human face with texture from three angles; 2D feature point detection of projection map; 2D feature point are backprojected into 3D to obtain 3D feature point; The PCA facial model is used to fit the original 3D facial model. 3D registration of that initially align mesh is performed to solve the energy equation; Recalculating texture coordinates for the final aligned mesh; After the registration of the three-dimensional face adjustment, get the adjusted three-dimensional face model. The invention adopts a set of technology for automatically recognizing three-dimensional human face characteristic points and adjusting the human face on the basis of the technology, It can beautify 3D face captured by 3D scanner with one button, simple and convenient, and has clear algorithm, friendly interface and robust results.It can be used in virtual face plastic surgery, computer animation and computer games and other fields.
Owner:上海影子智能科技有限公司
Diagnosability determining method of satellite control system based on transfer functions
ActiveCN102736618ASimple methodClear methodSimulator controlElectric testing/monitoringLinear correlationControl system
The invention discloses a diagnosability determining method of a satellite control system based on transfer functions. The method comprises the steps of: first, establishing a failure model of the satellite control system to obtain output transfer functions of failures; obtaining detectability conditions of various failures by judging whether the output transfer functions of failures are 0 or not through the failure transfer functions, and obtaining separability conditions of various failures by judging whether transfer functions corresponding to different failures are in linear correlation or not so as to obtain a diagnosability analyzing result of the satellite control system; and finally, calculating to obtain the failure detectability and the separability as well of the system failure detectability and the separability of a failure mode of the satellite control system by a diagnosability measurement calculation method. According to the diagnosability determining method of the satellite control system based on the transfer functions, detectability and separability judgment of the failure mode of the satellite control system are realized and the diagnosability of the satellite control system is measured.
Owner:BEIJING INST OF CONTROL ENG
Method for repeated fracturing of horizontal well
ActiveCN110761763AEffective Guidance for Refracturing ConstructionReasonable designFluid removalHorizontal wellsFracturing fluid
The invention discloses a method for repeated fracturing of a horizontal well. The method includes the steps that (1) parameter evaluation and optimization before repeated fracturing is conducted; (2)repeat fracturing is conducted along old fractures or novel holes are re-shot between the old fractures; (3) slickwater and carbon dioxide foam fracturing fluid are subjected to formulation optimization and preparation; (4) the slickwater and the carbon dioxide foam fracturing fluid are injected for main fracture fracturing or extension; (5) proppant injection construction is conducted; (6) replacement operation is conducted; (7) step (4) to (6) are repeated until construction is completed. The effect of repeated fracturing and reforming of a shale gas reservoir are greatly improved, the optimized results can effectively guide repeated fracturing construction, the reconstruction volume is greatly increased, the construction effect is significantly improved, and thus the greatest economicbenefits are obtained.
Owner:CHINA PETROLEUM & CHEM CORP +1
Coaxial digital holography method capable of effectively inhibiting zero-order and conjugate images
InactiveCN101957171AReduced Spatial Resolution RequirementsClear methodPhase-affecting property measurementsUsing optical meansPhase shiftedSpecial design
The invention relates to a coaxial digital holography method capable of effectively inhibiting zero-order and conjugate images. The method is characterized in that: aiming at a diffuse reflection type object or a transmission type object, through special design of a digital hologram recording process, a holographic reproduction image inhibiting the zero-order diffraction and conjugate image is acquired through simple numerical calculation by using only one digital hologram; and in a hologram reproduction process, an aperture or low-pass filtering operation can buffer zero-order + one-order diffraction optical waves and all the high-order diffraction optical waves and only allows the -1-order diffraction optical wave to transmit, so that the -1-order hologram is separated and reproduced. Compared with the traditional coaxial digital hologram, of which the reproduction of the hologram is seriously interfered by the zero-order and conjugate image, the holographic reproduction image by the method has ideal effect and overcomes the defects of non-instantaneity of the methods, such as phase shift, HRO substraction and the like, and complexity, multi-step calculation and the like of numerical iteration algorithm.
Owner:HAIAN JULI MAGNETIC MATERIAL CO LTD +1
Fault distance measuring method for hybrid transmission lines based on unknown parameters.
ActiveCN108008251AReliable principleImprove ranging accuracyFault location by conductor typesDistance analysisEngineering
The invention provides a fault distance measuring method for hybrid transmission lines based on unknown parameters. A hybrid transmission line includes a section of overhead line and a section of cable line. The fault distance (x) is obtained by eliminating the influence of the positive sequence impedance per unit length of the overhead line, the negative sequence impedance per unit length of theoverhead line, the positive sequence impedance per unit length of the cable line and the negative sequence impedance per unit length of the cable line in the hybrid transmission line. The fault distance measuring method has the advantages as follows: (1) the principle is reliable, and the precision of distance measurement is high; (2) the method is clear, the equation is solved without pseudo root, and a specific fault distance analysis formula is given; and (3) the value of practical application on an engineering site is high.
Owner:STATE GRID JIANGSU ELECTRIC POWER CO WUXI POWER SUPPLY CO +1
Method for improving effective modification volume through refracturing of shale gas horizontal well
PendingCN110359899AEffective Guidance for Refracturing ConstructionReasonable designFluid removalEconomic benefitsConstruction design
The invention discloses a method for improving the effective modification volume through refracturing of a shale gas horizontal well. The method comprises the steps that (1) reservoir assessment is carried out before refracturing; (2) the position of a refracturing partial pressure segment cluster is confirmed; (3) a partial pressure method is selected; (4) activated water is injected to make up formation pressure; (5) low-viscosity slickwater seam expansion is carried out; (6) low-viscosity slickwater and small-particle-size supporting agent sand carrying is carried out; (7) the high-viscosity slickwater foam liquid construction stage is carried out; and (8) other processes of replacement, drilling and plugging, liquid drainage, production and the like are carried out. According to the method, reliable bases are provided for refracturing construction design of a shale gas pool. Refracturing construction of the shale gas pool can be effectively guided, the modification volume can be greatly increased, the construction efficiency can be obviously improved, and therefore the maximum economic benefits are obtained.
Owner:CHINA PETROLEUM & CHEM CORP +1
Random distribution and generation method of fibers in unidirectional fiber reinforced composite material
ActiveCN106295062AEasy to operateClear methodDesign optimisation/simulationSpecial data processing applicationsGeneration processMechanical engineering technology
The invention belongs to the technical field of mechanical engineering, and particularly relates to a random distribution and generation method of fibers in a unidirectional fiber reinforced composite material. The method comprises the following steps that 1, a first fiber is generated on the cross section of the fiber reinforced composite material; 2, adjacent fibers of the first fiber are generated and defined as second-generation fibers; 3, according to the method of generating the adjacent fibers of the first fiber in the second step, all the fibers in the second-generation fibers are treated one by one, adjacent fibers are generated and defined as third-generation fibers, adjacent fibers are sequentially generated generation by generation till the circle centers of the fibers of one generation are all outside the cross section area of the fiber reinforced composite material, and the generation process is finished. According to the random distribution and generation method of the fibers in the unidirectional fiber reinforced composite material, the random characteristics of fiber distribution can be simulated, the volume ratio of the fibers can be increased to 70% or above, less sampling is achieved on the premise that the random characteristics of the fibers are not changed, the operation efficiency is improved, and the time is shortened.
Owner:NAT UNIV OF DEFENSE TECH
Bio-enzyme-CTAB joint conditioning method for sludge
InactiveCN106277712AEasy to getLow priceSludge treatment by de-watering/drying/thickeningBiological sludge treatmentChemistryElectricity
The invention provides a conditioning method used before sludge dewatering. The method includes the following implementation steps that 1, the temperature and pH of sludge are regulated to be within the proper range of a bio-enzyme; 2, the bio-enzyme is added into the sludge and mixed evenly, and a reaction is carried out for a period of time; 3, a certain amount of CTAB is added into the sludge, stirred and mixed, a reaction is carried out for a period of time, and then the mixture enters a dewatering unit. According to the method, the EPS component degrading and bound water releasing effects of the bio-enzyme and the hydrophobicity-hydrophilicity and charge neutrality of CTAB are combined, the advantages of the bio-enzyme and the advantages of CTAB are fully exerted, synergic effects are achieved, and the moisture content of sludge cakes is reduced to be 70% or lower after the sludge is dewatered. Besides, in the method, a conditioner is low in cost and wide in application range, all conditioning steps are clear and definite, operation is convenient, reduction is obvious, and the follow-up disposal cost of the sludge can be reduced.
Owner:BEIJING FORESTRY UNIVERSITY
Method for displaying multi-item alarm information at single position of operation screen
InactiveCN101727082ASimplify workSimplified accuracyComputer controlSimulator controlDirect observationComputer science
The invention relates to a method for displaying multi-item alarm information at a single position of an operation screen. The method for displaying multi-alarm information in a single position of the operation screen comprises the following steps: using HMI system software in GE Company to organize the order of the multi-item alarm information of each device in real time according to the importance; expressing all the chains of the alarm information in a program; and manufacturing the abnormal chain information at a screen position, and selecting the display mode and content according to need. The method for displaying the multi-item alarm information at the single position of the operation screen has the advantages of wide information contents and complete scheme, ensures that an operator directly observes and knows the information contents through the frequently used screen and knows a dispelling method, saves complicated calculation process of searching the program, shortens the accident handling time, improves the equipment operation rate, and guarantees the device safety and smooth operation of the production; and the method is simple, the program is concise, the display screen is clear, and the operating method is easy to grasp.
Owner:ANGANG STEEL CO LTD
Hot-rolling working roll temperature distribution obtaining method and device
ActiveCN110765671AForecast temperature field changesClear methodDesign optimisation/simulationWork rollThermal coefficient
The invention discloses a hot-rolling working roll temperature distribution obtaining method. The method comprises the steps that the arrangement form of a hot-rolling working roll cooling injection system is constructed; a working roll heat exchange area is divided according to the arrangement form of the working roll cooling injection system; rolling process parameters and thermophysical parameters, including working roll parameters, rolled piece parameters, medium parameters and heat exchange coefficients, are acquired; axial-radial section grid nodes of the working roll are divided, and coordinate system parameters and a temperature calculation model of each node are established; a temperature calculation model is utilized, the heat exchange area where the section of the working roll is located is judged firstly every time calculation is conducted from the initial calculation position to the final calculation position, and then the temperature distribution of the section of the working roll at the position is calculated through a corresponding working roll temperature model. The method has the beneficial effects that the method is clear and definite, assumption and simplification conditions are few, the temperature field change of the working roll in the hot rolling process can be accurately forecasted, the calculation precision is higher than that of an analytical method,and the calculation speed is higher than that of a finite element method.
Owner:WISDRI ENG & RES INC LTD
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