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59results about How to "Calculation method is fast" patented technology
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Method and System for Lithography Simulation and Measurement of Critical Dimensions with Improved CD Marker Generation and Placement
InactiveUS20080118852A1Quality improvementImprove accuracyPhotomechanical apparatusOriginals for photomechanical treatmentLithographic artistCritical dimension
A method and system for lithography simulation and measurement of critical dimensions with improved CD marker generation and placement is disclosed. The method and system specify a position for measuring a difference between a lithography image and a target pattern, generate one or more CD marker candidates, and select at least one CD marker from the one or more CD marker candidates.
Owner:CADENCE DESIGN SYST INC
Dereverberation apparatus, dereverberation method, dereverberation program, and recording medium
ActiveUS20110002473A1Big sizeCalculation method is fastSpeech analysisLine-transmissionFrequency bandAudio signal
A sound source model storage section stores a sound source model that represents an audio signal emitted from a sound source in the form of a probability density function. An observation signal, which is obtained by collecting the audio signal, is converted into a plurality of frequency-specific observation signals each corresponding to one of a plurality of frequency bands. Then, a dereverberation filter corresponding to each frequency band is estimated by using the frequency-specific observation signal for the frequency band on the basis of the sound source model and a reverberation model that represents a relationship for each frequency band among the audio signal, the observation signal and the dereverberation filter. A frequency-specific target signal corresponding to each frequency band is determined by applying the dereverberation filter for the frequency band to the frequency-specific observation signal for the frequency band, and the resulting frequency-specific target signals are integrated.
Owner:NIPPON TELEGRAPH & TELEPHONE CORP
Spaceborne dual-channel angle tracking calibration system and method
ActiveCN101923157AAccurately obtain error calibration signalsHigh measurement accuracyRadio wave reradiation/reflectionEngineeringTransmitter
The invention discloses a spaceborne dual-channel angle tracking calibration system and a method. The system comprises an antenna device, a polarization duplexer, a synthesis network, a sum-path receiver, a difference-path receiver, a transmitter, a digital signal processor and a calibration device. Due to the calibration device, the system can realize real-time compensation for an angle error signal within each period, thereby improving the system precision; and meanwhile, the calibration device of the invention has the advantages of simplicity and easy implementation.
Owner:XIAN INSTITUE OF SPACE RADIO TECH
Method for determining compensation voltage of full compensation of grounding current of controllable voltage source
ActiveCN109521322AAccurate calculationCalculation method is fastFault location by conductor typesVoltage amplitudeVoltage source
The invention provides a method for determining a compensation voltage for full compensation of the grounding current of a controllable voltage source. The method comprises steps that a voltage amplitude and a phase angle of an initial voltage of a target phase are acquired; the controllable voltage source is controlled for outputting an initial detection voltage, and a voltage amplitude and a phase angle of the initial detection voltage are acquired; the phase of the initial detection voltage is adjusted, and a corresponding phase angle of the target phase is measured; an absolute value of difference between the phase angle of the initial phase voltage of the target phase and the measured phase angle of the target phase is calculated; whether the absolute value is less than a preset threshold is determined, if yes, a voltage amplitude and a phase angle of a compensation voltage of the controllable voltage source are calculated and obtained, if not, the progress jumps to the step of adjusting the phase of the initial detection voltage. The method is advantaged in that under various topologies for full compensation of the grounding current of the controllable voltage source, a compensation output value of the controllable voltage source in single-phase grounding connection can be calculated quickly and accurately, the calculation method is fast, effective and simple, and the method can be well applied to a practical distribution network system.
Owner:YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
Computing method of revolution section profile of turbomachinery blade
InactiveCN101839149AImprove calculation accuracyCalculation method is simplePump componentsBlade accessoriesImpellerComputer science
The invention discloses a computing method of a revolution section profile of a turbomachinery blade, which mainly comprises the following steps: reading in each section profile data of the blade; taking out a point at the corresponding position on each section profile and recombining the points to form a space curve l; projecting the curve to an XZ plane and a YZ plane to obtain a curve lXZ and a curve lYZ; presetting a function relational expression R=f(X) of the intersecting line of a revolution surface and a meridian plane; presetting an initial radius Rinitial to solve the coordinates of the intersecting point A of a cylindrical revolution surface the axes of which is the X-axis and the radius of which is the initial radius Rinitial and the space curve l; substituting the coordinate AX of the point A at the X-axis into the function relational expression R=f(X) of the intersecting line of the revolution surface and the meridian plane to obtain the magnitude of the radius RA which corresponds to the coordinate AX on the revolution surface; and then judging whether the point A is the intersecting point according to the absolute value of RA-Rinitial. Each solved intersecting point forms the revolution section profile of the blade. The computing method has the advantages of convenience, rapidness, high computing precision and the like.
Owner:SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
Method for accurately measuring elastic modulus of tunnel rock in cold region after repeated freeze-thaw damage
ActiveCN109283086AAccurate calculation methodCalculation method is fastMaterial thermal analysisStrength propertiesFreeze thawingRock tunnel
The invention discloses a method for accurately measuring the elastic modulus of tunnel rock in a cold region after repeated freeze-thaw damage. The method comprises the steps of: A, micro-crack propagation half-length 1N=Delta 1N+1(N-1) (32); B, the corresponding micro-crack density parameter beta is expressed as the formula(33) shown in the specification; C, the number of propagated and activated micro-cracks in the unit volume is as the formula(34) shown in the specification; D, the effective elastic modulus of the rock is expressed as the formula(30) shown in the specification; and E, substituting the formulas (32) to (34) into the formula (30), and solving the EN to obtain the equivalent elastic modulus of tunnel surrounding rock after N times of freeze-thaw. According to the method for accurately measuring the elastic modulus of tunnel rock in a cold region after repeated freeze-thaw damage, the method has the advantages of being accurate and fast; the foundation is provided forthe calculation of the frost heaving force of the surrounding rock under the repeated freeze-thaw damage condition; and a practical guide is provided for the direction and the method of the construction operation of the rock tunnel maintenance engineering.
Owner:CHINA UNIV OF GEOSCIENCES (BEIJING)
Method and system for lithography simulation and measurement of critical dimensions
InactiveUS20080120073A1Quality improvementIncrease productionPhotomechanical apparatusOriginals for photomechanical treatmentLithographic artistLithography process
A method and system for lithography simulation is disclosed. The method and system specify a subject region of a lithography image with a CD marker, specify a threshold intensity over the lithography image, specify a gradient to a threshold value of the threshold intensity, and calculate a sensitivity or ratio of change of an image boundary of the lithography image to lithography process variation.
Owner:CADENCE DESIGN SYST INC
Statistical streaming
ActiveUS7868886B2Quick displayWithout losing key characteristicDrawing from basic elementsCurrent/voltage measurementDigital dataData mining
Owner:HOTTINGER BALDWIN MEASUREMENTS
Point location accuracy evaluation method for gantry drilling machine tool
The invention provides a point location accuracy evaluation method for a gantry drilling machine tool. The method comprises the steps that 1, a theoretical machining point of a tool is constructed, position coordinates NPi=[xi,yi,zi] of the theoretical machining point and a unit cutter-axis vector Vi=[Ii, Ji and Ki]T of a cutter located at the position are obtained; 2, three non-collinear points are selected on a first rotating shaft as mark points, the machine tool is adjusted to the initial state and a laser tracker is used for measuring coordinates of the mark points at the moment; then, an axial equation of the first rotating shaft and an axial equation of a second rotating shaft are obtained, and initial position coordinates TCP0 of a cutter point of the cutter are worked out; 3, the machine tool is started to work, the laser tracker is used for measuring coordinates of the mark points on the first rotating shaft when the cutter moves the theoretical machining points; 4, actual machining position coordinates of the cutter point of the cutter are worked out, and a difference delta Pi between the actual machining position coordinates and the theoretical machining position coordinates of the cuter point and a comprehensive error delta Pi are worked out. The measuring and calculation method is simple and rapid, and the cost is saved.
Owner:TSINGHUA UNIV
Quantitative measuring and calculating method for clay mineral with coincident characteristic peak
ActiveCN103196930APrecise compositionAccurate contentMaterial analysis using radiation diffractionClay mineralsX-ray
The invention relates to a quantitative measuring and calculating method for clay minerals with coincident characteristic peaks, which is characterized in that: firstly, according to China National Standard GB / T14563-2008 kaolin and a test method thereof, the oxide content in a clay mineral sample is detected, the contents of a part of mineral components in the clay mineral sample are analyzed based on the X-ray diffraction, and contents of the mineral components in the clay mineral are obtained by calculation according to the composition characteristics of the clay mineral. The measuring and calculating method provided by the invention is relatively simple, rapid, accurate, cost-saving, and can quantitatively measure the contents of the clay mineral components especially in case of overlapping characteristic peaks.
Owner:中国高岭土有限公司
Fast wind power capacity reliability calculating method based on reliability function
ActiveCN104156885AAccurate calculationImprove computing efficiencyData processing applicationsElectricityCalculation error
The invention relates to a fast wind power capacity reliability calculating method based on a reliability function. The fast wind power capacity reliability calculating method comprises the following steps: 1) acquiring capacity and forced outage rate of each generator unit in an electrical power system; 2) calculating a unit outage capacity table in the electrical power system; 3) calculating the reliability function of the system; 4) acquiring a hour-class load curve in an assessment target year, a total installed capacity of a wind farm in the electrical power system, and a hour-class wind power output curve in the assessment target year; 5) setting an initial value of wind power capacity reliability; 6) calculating a weighting factor for each hour; 7) calculating wind power capacity reliability in current iteration; 8) according to a wind power capacity reliability result obtained in the current iteration and a capacity reliability result in last iteration, judging whether the iteration is convergent, if so, determining that the current iteration is the wind power capacity reliability result, otherwise, returning to the step 6). The fast wind power capacity reliability calculating method is relatively small in calculation error; by the fast wind power capacity reliability calculating method, the wind power capacity reliability can be accurately calculated in various electrical power systems and under various wind power conditions.
Owner:STATE GRID CORP OF CHINA +3
TBW layout aircraft wing structure analysis method based on engineering beam theory
ActiveCN110334427AMake up for the lack of time-consumingCalculation method is fastGeometric CADSustainable transportationReduced modelStructure analysis
The invention discloses a TBW layout aircraft wing structure analysis method based on an engineering beam theory. The method comprises the following steps: firstly, selecting proper parameters to carry out parametric modeling on a wing part (including a main wing, an inclined strut and a support) of the truss support wing aircraft; and on the basis of the established three-dimensional model, dividing the wing box section into a plurality of small sections along the spanwise direction, and calculating the equivalent stiffness of each small section; simplifying a main wing and an inclined strutinto a beam model and simplifying a support into a rod model through an engineering beam theory, wherein the simplified model is a statically indeterminate structure system, and the equivalent stiffness is added to the simplified model according to spanwise distribution; through the virtual force principle, analyzing the structure, and obtaining the stress and the structure displacement in the structure. According to the method, a rapid calculation method is provided for wing structure weight analysis in the overall design stage of the truss supporting wing aircraft, and the defects of data loss of an empirical method, too long consumed time of a finite element method and the like are overcome.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Method for calculating arc line in mechanical blade of impeller
ActiveCN101813004ACalculation method is simpleCalculation method is fastBlade accessoriesMachines/enginesImpellerEngineering
The invention discloses a method for calculating an arc line in the mechanical blade of an impeller, comprising the following steps: selecting a point A on the back arc of the blade to obtain the normal line of the back arc at the point A and the crossing point C of the normal line and the inner arc; setting a circle O2 using a line segment AC as the diameter to obtain another crossing point D ofthe circle O2 and the inner arc; selecting a point of the CD end of the inner arc as the normal line of the inner arc, wherein the normal line is crossed with the line segment AC, and the crossing point can be determined to be a point of the mean camber line if the difference between the distance between the crossing point and the point A and the distance between the crossing point and the selected point on the inner arc is within the specified error range. The position of the tangential point of the inscribed circle and the inner arc is accurately limited on the CD curve of the inner arc by selecting a point A on the back arc as the tangential point of the inscribed circle and the inner arc so as to narrow down target area, save calculation time and be capable of guaranteeing iteration convergence, and the calculation method of the mean camber line is simple, convenient and quick, and has the advantages of high calculation precision and quick calculation speed.
Owner:SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
Powder X-ray diffraction method for measuring cell parameters of ZSM-23 molecular sieve
InactiveCN105738389AReduce mistakesCalculation method is simpleMaterial analysis using radiation diffractionMolecular sieveDiffractometer
The invention discloses a powder X-ray diffraction method for measuring cell parameters of a ZSM-23 molecular sieve. The method includes the steps of: 1) performing grinding, sieving, roasting activation and room-temperature constant-moisture treatment to a ZSM-23 molecular sieve sample to obtain a ZSM-23 molecular sieve to-be-tested sample; 2) under the equal operation conditions of a powder X-ray diffraction instrument, respectively pressing the ZSM-23 molecular sieve to-be-tested sample and a NIST mica standard sample into corresponding sample frames in the powder X-ray diffraction instrument, and carrying out sample diffraction peak angle correction measurement and collecting powder X-ray diffraction data; and 3) when the diffraction peak angle is corrected with the NIST mica standard sample, calculating the cell parameters of the ZSM-23 molecular sieve sample according to an orthorhombic system interplanar crystal spacing formula.
Owner:PETROCHINA CO LTD
Statistical streaming
ActiveUS20060181440A1Method be fastQuick displayDrawing from basic elementsCurrent/voltage measurementData pointDigital data
A method of providing a display signal, wherein digital data to be displayed has associated with it statistical values determined for pre-determined sized blocks of the digital data, comprising the steps of: determining display scaling parameters; determining from the display scaling parameters the extent to which the statistical values are suitable to use in place of some or all of the digital data when determining which data points of either the digital data and / or statistical values to display; determining the data points to display; reading the digital data and / or statistical values to be displayed; and generating the display signal from the digital data and / or statistical values.
Owner:HOTTINGER BALDWIN MEASUREMENTS
Moon shadow occlusion estimation and satellite autonomous management method based on visual circle
ActiveCN111216923AImprove computing efficiencyCalculation method is fastCosmonautic power supply systemsArtificial satellitesLunar orbiterEnergy supply
The invention relates to a moon shadow occlusion estimation and satellite autonomous management method based on a visual circle, and belongs to the technical field of spacecraft on-orbit operation autonomous management and diagnosis. The method comprises the steps of: 1, measuring a moon-satellite-sun angle, an apparent radius of the sun seen from a satellite and an apparent radius of the moon seen from the satellite; 2, respectively calculating moon shadow occlusion ratios of the satellite in a moon shadow umbra region, a moon shadow penumbra region and a moon shadow pseudo-umbra region; 3, calculating a storage battery discharge ampere-hour number in the moon shadow period; 4, measuring a storage battery rated capacity CP, subjecting the storage battery discharge ampere-hour number CD and the storage battery rated capacity CP to comparison judgment, according to a judgment result, not taking action, or reducing the satellite discharge capacity. According to the method, the influenceof the moon shadow on satellite energy supply can be quantitatively estimated through a calculation result. The effectiveness and accuracy of the algorithm are verified through actual on-orbit data.
Owner:BEIJING INST OF SPACECRAFT SYST ENG
Rapid MSK communication detection demodulation method
InactiveCN103973622AEasy to handleImprove adaptabilityPhase-modulated carrier systemsComputation complexityCarrier signal
The invention discloses a rapid MSK communication detection demodulation method, and relates to an easy and rapid MSK communication detection and information blind demodulation reduction method. A user judges whether target communication exists or not and completes information demodulation reduction according to analysis of output signals of a monitoring / reconnaissance receiver in the certain radio environment and extraction of key parameters. The method comprises the steps that a non-cooperative receiver searches for and scans a related frequency band, the computation complexity is low, and software and hardware are easy to obtain. Meanwhile, the information blind demodulation reduction method is a non-coherent detection method. According to the rapid MSK communication detection demodulation method, complex operation processing of carrier phase synchronization is avoided by achieving demodulation reduction of unknown information, meanwhile, the requirement for system carrier frequency estimation accuracy is low, a certain error is allowed to exist in carrier frequency estimation, and the requirements that deviation possibly exists in the working frequency in actual communication and the signal to noise ratio received by non-cooperative communication is low are met.
Owner:XUCHANG UNIV
Method and system for lithography simulation and measurement of critical dimensions
InactiveUS7953582B2Quality improvementImprove accuracyPhotomechanical apparatusOriginals for photomechanical treatmentLithography processLithographic artist
Owner:CADENCE DESIGN SYST INC
Terahertz dielectric spectrum-based rubber material aging state discrimination system and method
ActiveCN111879723AGuaranteed non-contact and non-destructive measurementReduce material requirementsDielectric property measurementsPhase-affecting property measurementsRubber materialTime domain
The invention provides a terahertz dielectric spectrum-based rubber material aging state discrimination system, belongs to the technical field of rubber material aging judgment, and comprises a terahertz time domain spectrometer, and a transmitting lens antenna and a receiving lens antenna of the terahertz time domain spectrometer are both arranged in a closed box body. A to-be-detected sample isarranged at the focal points of the transmitting lens antenna and the receiving lens antenna, and the surface of the to-be-detected sample is perpendicular to the terahertz transmission path; according to the invention, non-contact nondestructive measurement of a test sample is ensured, the requirement on a sample material is low, the operation is convenient, the measurement frequency is wide, theaccuracy is high, the fluctuation range of a measured value is small, and the method has outstanding advantages in aging detection of insulating materials such as plastic and rubber.
Owner:SHANDONG ACAD OF SCI INST OF AUTOMATION
Curve corner and deflection direction determination method and application of road design curve
ActiveCN112699434AThe calculation method is simple and clearSimplify the judgment stepsGeometric CADSpecial data processing applicationsTotal stationStructural engineering
The invention discloses a curve corner and deflection direction determination method and application of a road design curve, and relates to the technical field of road plane alignment design and construction.The curve corner and deflection direction determination method comprises the steps: obtaining the curve type of a target curve and a first straight line and a second straight line which are connected to the two ends of the target curve respectively; randomly taking two points on the first straight line and the second straight line respectively, and calculating the orientation of the first straight line and the orientation of the second straight line; obtaining a minimum rotation angle value of the orientation of the first straight line deflected to the orientation of the second straight line; obtaining a curve corner and a deflection direction of the target curve according to the type of the target curve and the minimum corner value. The invention also discloses an application of the method in engineering surveying by adopting the total station. The calculation method is simple and clear, it is only needed to determine whether the target curve is a common curve or a turn-back curve in the calculation process, and curve corner value calculation and deflection direction do not need any judgment step.
Owner:CHINA RAILWAY NO 2 ENG GRP CO LTD +1
Obtaining method and device for controlled voltage source ground connection current total compensation output value
ActiveCN109507521AThe implementation method is simpleAccurate calculationFault location by conductor typesEmergency protective arrangements for limiting excess voltage/currentSingle phaseComputing systems
The invention discloses an obtaining method and device for a controlled voltage source ground connection current total compensation output value. The method comprises the steps that detection voltageis output by a controlled voltage source, and the amplitude of the detection voltage is controlled to be constant, and the phase of the detection voltage is changed; the voltage falling number of a target phase before and after the controlled voltage source outputs the detection voltage is calculated; if the voltage falling number is within the threshold value range, the phase difference between the detection voltage and the target phase voltage before the controlled voltage source outputs the detection voltage is calculated; the phase difference is adopted, and the voltage output value for controlled voltage source total compensation during system single phase ground connection is calculated. Under various topology structures of controlled voltage source ground connection current total compensation, the voltage output value of controlled voltage source total compensation during single phase ground connection can be rapidly and accurately obtained, and the controlled voltage source total compensation implementation difficulty is lowered.
Owner:YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
Compensation voltage prediction method for full compensation of controllable voltage source
ActiveCN109521321AAccurate calculationCalculation method is fastFault location by conductor typesVoltage sourceDistribution networks
The invention provides a compensation voltage prediction method for full compensation of a controllable voltage source. Under various topologies for full compensation of the grounding current of the controllable voltage source, a compensation output value of the controllable voltage source in single-phase grounding connection can be calculated quickly and accurately, the calculation method is fast, effective and simple, and the method can be well applied to a practical distribution network system.
Owner:YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
Distributed calculation and deep learning-based electrocardio beat classification method
ActiveCN108399369AEasy to calculateReduce negative impactCharacter and pattern recognitionNeural architecturesClassification methodsTest set
The invention discloses a distributed calculation and deep learning-based electrocardio beat classification method. The method comprises the following steps of: firstly obtaining an electrocardio beatsignal, dividing a sample set, and carrying out local regionalization on electrocardio data in a training set; constructing a distributed deep learning field, carrying out training by utilizing dataof the training set, and realizing data parallelization by adoption of a software synchronization method in the training; and finally classifying electrocardio data of a test set by utilizing the trained deep learning field. By utilizing the method, potential information in data can be discovered, so that the problem that sign description in traditional electrocardio beat classification process iseasy to cause deviations and wrong classification is easy to occur when electrocardio data features are not obvious are solved, and the problem that single-machine training consume too much time is solved; and the method can be applied to the classification of mass EGG data and remarkably improve the calculation efficiency.
Owner:SOUTHEAST UNIV
Calculation method of earthwork quantity and device for calculating earthwork quantity
PendingCN109145429AHigh precisionCalculation method is simpleGeometric CADSpecial data processing applicationsDomain modelCalculation methods
The invention provides a calculation method of earthwork quantity and a device for calculating earthwork quantity. The calculation method of earthwork quantity comprises the following steps: Step S1,obtaining engineering survey data of earthwork quantity; Step S2, constructing a surface domain model according to the obtained engineering survey data; Step S3, calculating the earthwork quantity according to the constructed area domain model. According to the earthwork quantity calculation method of the embodiment of the invention, the earthwork quantity can be automatically calculated in batches, and the earthwork quantity calculation method is not only simple, fast, but also high in precision.
Owner:HEILONGJIANG PROV WATER CONSERVANCY & HYDROPOWER SURVEY & DESIGN INST +1
Disaster warning method and system based on hydrological connected structure index
The invention provides a disaster warning method and system based on a hydrological connected structure index. The method comprises: dividing a target region into a plurality of grid regions, and obtaining a relative volumetric moisture content corresponding to each grid region by measuring the volumetric moisture content of the surface soil of each grid region and the non-capillary porosity; obtaining at least one connected region according to the relative volumetric moisture content corresponding to each grid region, and calculating a ratio of a total area of all connected regions to a totalarea of the target region as a first target index; adding the distance between each two grid regions in the connected region for any connected region, and obtaining the total distance corresponding to the connected region, and adding the total distance corresponding to all connected regions to obtain a second target index; performing disaster warning for the target area according to the first target index and the second target index. The method and system can quantify the hydrological connectivity structure, thereby accurately warning the disaster based on the hydrological connectivity structure index.
Owner:BEIJING FORESTRY UNIVERSITY
Disaster early warning method and system based on hydrological connectivity structure index
Owner:BEIJING FORESTRY UNIVERSITY
A Method for Determining the Grooving Ratio of Wall Panel in Wind Tunnel Test Section
ActiveCN110044574BReduces the degree of jamming effectsQuick solveAerodynamic testingAnalysis workingModel test
Owner:INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT
Method and application for determining curve corner and deflection direction of road design curve
ActiveCN112699434BSimplify the judgment stepsThe calculation method is simple and clearGeometric CADSpecial data processing applicationsEngineeringTotal station
Owner:CHINA RAILWAY NO 2 ENG GRP CO LTD +1
Method for determining uniaxial compressive strength damage of red mudstone after dry-wet cycle
PendingCN114459893AReduced compressive strengthCalculation method is fastMaterial strength using tensile/compressive forcesPorosityImaging processing
The invention discloses a method for determining the uniaxial compressive strength damage of red-layer mudstone after the dry-wet cycle action, which comprises the following steps: acquiring a stress-strain curve of a mudstone sample after the dry-wet cycle action to obtain the uniaxial compressive strength, and performing scanning electron microscope image processing on the mudstone after different dry-wet cycles to obtain the uniaxial compressive strength damage of the red-layer mudstone. Analyzing the porosity of the sample under a specific multiple, calculating a pore expansion coefficient, obtaining a change rule of the pore expansion coefficient along with a dry-wet cycle, and determining the correlation between the uniaxial compressive strength and the pore expansion coefficient based on response characteristics of the uniaxial compressive strength and the pore expansion coefficient; the method can be used for rapidly calculating the uniaxial compressive strength and the damage amount of the mudstone after the dry-wet cycle action.
Owner:SOUTHWEST PETROLEUM UNIV
Method and device for calculating availability ratio of redundancy-incomplete maintainable system
ActiveCN108334050AAvailability achievedSolve the technical problem of difficult calculation of availability rateElectric testing/monitoringComplex mathematical operationsFailure rateAutomatic control
The invention discloses a method and a device for calculating the availability ratio of a redundancy-incomplete maintainable system. The method comprises the following steps of defining various statesin an automatic control system, wherein all the states comprise an all-normal state, a partial-normal state and an all-fault state; calculating the conversion probability among various states in theautomatic control system according to a pre-acquired failure rate and a pre-acquired maintenance rate; calculating the conversion probability among various states according to a pre-designed algorithm, and obtaining the availability ratio of the redundancy-incomplete maintainable system. According to the invention, the problem that the availability ratio of the redundancy-incomplete maintainable system is difficult to calculate due to the fact that no calculation method for calculating the availability ratio of the redundancy-incomplete maintainable system is available in the prior art can besolved.
Owner:北京龙鼎源科技股份有限公司
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