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30results about How to "Simplify inspection steps" patented technology
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Measuring method, inspection method, inspection device, semiconductor device, method of manufacturing a semiconductor device, and method of manufacturing an element substrate
InactiveUS6891391B2Easy to checkSimplify inspection stepsSemiconductor/solid-state device testing/measurementSemiconductor/solid-state device manufacturingSemiconductorSignal processing
An inspection method which simplifies an inspection step by eliminating the need to set probes on wiring or probe terminals, and an inspection device for performing the inspection step. A voltage is applied to each of inspected circuits or circuit elements to operate the same. Signal processing is performed on an output from each inspected circuit or circuit element during operation to form a signal (operation information signal) including information on the operating condition of the circuit or the circuit element. The operation information signal is amplified and the amplitude of an alternating current voltage separately input is modulated with the amplified operation information signal. The voltage of the modulated alternating current is read in a non-contact manner to determine whether the corresponding circuit or circuit element is non-defective or defective.
Owner:SEMICON ENERGY LAB CO LTD
Inspection method and inspection apparatus
InactiveUS20020130675A1Avoid production cutsSimplify inspection stepsStatic indicating devicesIndividual semiconductor device testingElectricityElectromagnetic electron wave
There is established an easier inspection method with which it is not required to set up probes on wires. Also, there is provided an inspection apparatus using this inspection method. With the inspection apparatus or inspection method, primary coils of an inspection substrate and secondary coils of a device substrate are superimposed on each other so that a certain space is maintained therebetween. An AC signal is inputted into the primary coils, thereby generating an electromotive force in each secondary coil by electromagnetic induction. Then, each circuit provided on the device substrate is driven using the electromotive force and information possessed by an electromagnetic wave or electric field generated in this circuit is monitored, thereby detecting each defective spot.
Owner:SEMICON ENERGY LAB CO LTD
Measuring method, inspection method, inspection device, semiconductor device, method of manufacturing a semiconductor device, and method of manufacturing an element substrate
ActiveUS20050218926A1Simplify inspection stepsSemiconductor/solid-state device testing/measurementContactless testingDevice materialEngineering
An inspection method which simplifies an inspection step by eliminating the need to set probes on wiring or probe terminals, and an inspection device for performing the inspection step. A voltage is applied to each of inspected circuits or circuit elements to operate the same. Signal processing is performed on an output from each inspected circuit or circuit element during operation to form a signal (operation information signal) including information on the operating condition of the circuit or the circuit element. The operation information signal is amplified and the amplitude of an alternating current voltage separately input is modulated with the amplified operation information signal. The voltage of the modulated alternating current is read in a non-contact manner to determine whether the corresponding circuit or circuit element is non-defective or defective.
Owner:SEMICON ENERGY LAB CO LTD
Rotary transformer inspection device and inspection method thereof
InactiveCN107728097AImprove inspection efficiencySimple structureElectrical measurementsData acquisitionEngineering
The present invention provides a rotary transformer inspection device which comprises a data acquisition component for acquiring a voltage digital signal and a current digital signal of a rotary transformer and a waveform signal of excitation voltage, a data processing component used for calculating the frequency of the excitation voltage according to the waveform signal of excitation voltage andcalculating parameters of the rotary transformer according to the digital signal obtained by the data acquisition component and the frequency of the excitation voltage. By using the device of the invention, the effects are that the overall structure is simplified, measuring equipment is greatly reduced, the cost is reduced, the testing of all inspection items can be realized, and the production efficiency can be greatly improved; digital testing means are used, and the reliability, stability and accuracy of inspection can be greatly improved. The invention also provides an inspection method using the above device, and the effects are that the inspection steps are simple, the method is practical, a calculation formula used in the inspection process is simple, the calculation speed is fast,and the accuracy is high.
Owner:湖南银河电气有限公司
Concealed earphone detector and detection method thereof
InactiveCN1880973AShorten the timeSimplify inspection stepsDetection using electromagnetic wavesAcoustic radiationMicrophone
The invention discloses a stealth earphone detector and detecting method, which comprises the following parts: AF electromagnetic emission part, fixed-rate emission circuit, acoustic wave receiving part, frequency-selective acoustic control circuit and main control circuit, wherein the main control circuit controls one or more acoustic frequency electric signal from fixed-rate emission circuit, which drives acoustic electromagnetic wave to send and receive acoustic electromagnetic wave of coil; the electromagnetic wave can be reduced into same-frequency sound by electronic stealth earphone within certain scale; when the microphone picks up sound to excite the frequency-selective acoustic control circuit, the main control circuit judges according to input electric signal of frequency-selective acoustic control circuit due to certain degree acoustic radiation from earphone outsides for electronic stealth earphone.
Owner:凌子龙
Miniature blood detector for rapidly detecting acute myocardial infarction marker, and detection method thereof
ActiveCN108918889ASimplify inspection stepsAchieve early diagnosisDisease diagnosisBiological testingCross-linkSeparation technology
The invention relates to a miniature blood detector for rapidly detecting an acute myocardial infarction marker, and a detection method thereof. The miniature blood detector comprises a blood sample inlet (1), a blood separator (2), a serum sample outlet (3), an immunoadsorption reactor (4), a pH-sensitive field effect transistor (5) and a micro-current detection circuit (6); the blood sample is injected from the sample inlet (1), and flows through a blood separation membrane (9), serum enters the immunoadsorption reactor (4), an acute myocardial infarction marker antigen in the serum specifically binds to its antibody, and is cross-linked with an enzyme in order to cause the change of the pH value of a reaction solution in order to change the current signal of the pH-sensitive field effect transistor (5), the current signal is output by the micro-current detection circuit (6), and the concentration of the measured marker is displayed. The concentration of the acute myocardial infarction marker is detected by using whole blood as a biological sample, combining a membrane separation technology with a micro biosensor element, integrating the blood separation membrane with the micropH-sensitive field effect transistor, performing an electronic enzyme-linked immunosorbent reaction and adopting current response as an output in order to quickly and easily achieve clinical detectionof acute myocardial infarction.
Owner:NANJING UNIV OF TECH
Automatic detection platform based on computer hardware
InactiveCN109857605AEasy to detectShorten the timeDetecting faulty computer hardwareElectric machineryComputer engineering
The invention discloses an automatic detection platform based on computer hardware. The platform comprises a detection box, a motor box and a gear box, the bottom of an inner cavity of the detection box is fixedly connected with the bottom of the motor box; the top of the detection box is fixedly connected with the bottom of the gear box; and the bottom of an inner cavity of the motor box is fixedly connected with a first motor, an output shaft of the first motor is fixedly connected with a first gear, the front face and the back face of the first gear are both engaged with toothed plates, andthe front face and the back face of the motor box are both fixedly connected with first sliding rails. The invention discloses an automatic detection platform based on computer hardware. According tothe computer hardware detection platform, a user can conveniently detect computer hardware, the operation is simple and convenient, the time of the user is saved, the detection steps of manually detecting the computer hardware are simplified, the working efficiency is improved to a certain extent, the device has a good function of facilitating the operation, and the computer hardware is lifted toa specified position.
Owner:合肥清若科技有限公司
Base resin for soldering flux, soldering flux and solder paste
ActiveCN104321387AImprove thermal stabilityImprove liquidityWelding/cutting media/materialsSoldering mediaCrack resistanceResin acid
Owner:ARAKAWA CHEM IND LTD
Thin-layer identification method for vitality-preserving soup and similar formula extracts and preparations thereof
ActiveCN112697949AAvoid separate sample preparationEasy to separateComponent separationPreparing sample for investigationBiotechnologyAcetic acid
The invention relates to a thin-layer identification method for vitality-preserving soup and similar formula extracts and preparations thereof which can be used for identifying main medicines such as ginseng, astragalus membranaceus and liquorice in the vitality-preserving soup and the similar formula extracts and preparations thereof at the same time, avoids independent sample preparation, plate application, development, color development and inspection of three medicines, and the method is simple to operate, short in detection period and high in inspection efficiency. A thin-layer chromatogram obtained by the method is good in separation degree and clear in spot color development, and the use of irritant reagents such as ammonia water, trichloromethane and glacial acetic acid is avoided.
Owner:浙江金城阜通制药有限公司
Spot check method and related device
ActiveCN109308235AAvoid detection errorsSimplify inspection stepsFaulty hardware testing methodsOperating system
A method for spot check and relate apparatus are disclosed in that embodiment of the present application, appliedto Mobile Terminals, The method comprises the following steps: detecting a routine check request, determining a target device to be routine checked, obtaining a routine check standard of the target device, detecting whether the routine check standard is the latest version, if not, updating the routine check standard, detecting the target device according to the updated routine check standard, generating a routine check result, and finally outputting the routine check result. Embodiments of the present application are advantageous in simplifying the routine check steps, improving the routine check efficiency and accuracy, and meeting the requirements of specific scenarios such asproduction and processing.
Owner:OPPO CHONGQING INTELLIGENT TECH CO LTD
Bridge warning device convenient to maintain
InactiveCN107610614AEasy maintenanceImprove work efficiencyElectric/electromagnetic visible signallingIlluminated signsElectricityAgricultural engineering
The invention discloses a bridge warning device which is convenient to maintain and comprises a mounting seat, wherein the mounting seat is provided with an embedded part, an insertion groove is formed in the mounting seat, the insertion groove is connected with an energizing passage through an arc-shaped guide rail, a first conductive sheet is installed inside the energizing groove, a clamping block is arranged at the front end of the arc-shaped guide rail, a rubber waterproof gasket is arranged at the front end of the clamping block, the energizing groove is internally connected with an inserting block, a second conductive sheet is installed on the inserting block, the right side of the inserting block is fixedly connected with a sliding block, the upper part of the sliding block is connected with a pressing block, the upper part of the pressing block is provided with a waterproof rubber cover, the waterproof rubber cover is fixedly connected with a housing, a telescopic rod is mounted on the sliding block, and a spring and a spring sleeve are mounted on the telescopic rod. As for the bridge warning device, the mounting base is embedded in a bridge body, and a warning screen is mounted on the mounting base by means of snap connection, thereby solving the problems of the low installation efficiency due to the use of screws and the negative impact of the slow speed of overall maintenance on traffic.
Owner:南京极佳物联网科技有限公司
Hydrogel-based trace whole blood separation and plasma detection integrated microfluidic chip
ActiveCN110531065AIncrease separation speedSolve the detection speed is slowPreparing sample for investigationLaboratory glasswaresDiseaseMicrosphere
The invention discloses a hydrogel-based trace whole blood separation and plasma detection integrated microfluidic chip. In the chip, hydrogel is obtained through crosslinking of PEGDA (poly(ethyleneglycol) diacrylate), a photoinitiator and immunomicrospheres. The microfluidic chip comprises an incubation channel located on the upper layer, a plasma separation detection channel located on the lower layer and a filter membrane located between the upper layer and the lower layer; two ends of the incubation channel are open and are a sample inlet and a sample outlet respectively; one end of a whole blood separation detection channel is open; and the whole blood separation detection channel is filled with a PEGDA hydrogel system. Steps of blood testing can be effectively simplified, minimallyinvasive POCT (point-of-care testing) of community health care and home health care is realized, and real-time monitoring of health state of residents and early warning and diagnosis of diseases arefacilitated.
Owner:SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV +1
Method for establishing oral diagnosis neural network model and oral diagnosis method
PendingCN111914931AImprove diagnostic efficiencySimplify inspection stepsDentistryMedical automated diagnosisOral medicineOral Diagnosis
The invention is suitable for the technical field of oral medicine, and provides a method for establishing an oral diagnosis neural network model and an oral diagnosis method, and the method for establishing the oral diagnosis neural network model comprises the steps: obtaining a training set comprising oral images of classified patients; obtaining a preset oral defect image from the training setto construct a sample set; on the basis of the structure of the VGG16 convolutional neural network model, applying a loss function and an activation function; and putting the training set and the sample set into a VGG16 neural network for training to generate an oral diagnosis neural network model. According to the invention, image recognition and preliminary diagnosis of oral defects such as wrong occlusion can be realized, so that the examination steps are simplified, the examination time is shortened, and the overall diagnosis efficiency of patient treatment is improved.
Owner:STOMATOLOGICAL HOSPITAL OF CHONGQING MEDICAL UNIV
Project difference report generation method and device, computer equipment and storage medium
PendingCN109710519AEasy to browseReduce inspection timeSoftware testing/debuggingDocumentationDatabase
The invention discloses a project difference report generation method. The invention discloses a device, computer equipment and a storage medium. Firstly, a new version project file and an old versionproject file are obtained; secondly, determining a file path name and a file name of each sub-file in the new version project file and the old version project file; comparing the subfiles of the newversion project file and the old version project file with the same file name under each same file path name to obtain a difference information block, and then associating the difference information block with the file path name corresponding to the difference information block; Generating a difference document according to all the associated difference information blocks; and generating a file directory according to the file names and the file path names corresponding to all the difference information blocks in the difference document, and finally associating the difference document with thefile directory to generate a project difference report.
Owner:PINGAN PUHUI ENTERPRISE MANAGEMENT CO LTD
Chlortetracycline hydrochloride bacterial endotoxin inspection equipment and method
ActiveCN108414763AReasonable structural designSimplify inspection stepsPreparing sample for investigationAgainst vector-borne diseasesFixed frameToxin
The invention relates to the field of biological experiments, in particular to chlortetracycline hydrochloride bacterial endotoxin inspection equipment and method. The chlortetracycline hydrochloridebacterial endotoxin inspection equipment comprises a standard liquid preparation device, a test solution preparation device and a tachypleus amebocyte lysate preparation device; the standard liquid preparation device comprises a first fixed frame; one side of the first fixed frame is fixedly connected with a first mixing chamber; an opening tube on the top of the first mixing chamber is internallyprovided with a first water filter membrane; the opening tube on the top of the first mixing chamber is provided with an end cover; the side wall of an opening tube at the upper part of the first water filter membrane is provided with a dissolved water supply tube which is connected with an external supply end in a communicating manner; and the dissolved water supply tube is provided with a dissolution flowrate valve. The chlortetracycline hydrochloride bacterial endotoxin inspection equipment is reasonable in structure design and simple in inspection step, can rapidly and accurately performaccurate judgement on the content of chlortetracycline hydrochloride bacterial endotoxin, more effectively meets the demands of people and solves the problem in the prior art.
Owner:辰欣佛都药业(汶上)有限公司
Sampling container for fused metal thermal analysis
InactiveCN1407326ASpeed up the flowAvoid coolingWithdrawing sample devicesTesting metalsCooling curveMaterials science
The invention provides a sampling vessel for thermal analysis of molten metal in which the time required for analysis can be shortened and the temperature change rate in eutectic can be reduced as compared with a conventional sampling vessel, so that the eutectic temperature can be obtained easily accurately for a short time. In order to realize the above, the diameter D of a sample chamber 11 is set to be in the range of 16 to 24 mm, the depth L of the sample chamber is set to be 36 mm or more, and the distance LS from an opening 11a of the sample chamber 11 to a temperature sensor 2 is set to be in the range of 7 to 22 mm. Accordingly, the time required for the temperature to reach the eutectic point can be shortened, and the gradient of a cooling curve in eutectic can be reduced.
Owner:K K SUKEWA
Probes and gene chip for pseudomonas aeruginosa nucleic acid detection, and kit
InactiveCN108048583AMeet the needs of on-site testingSimplify inspection stepsMicrobiological testing/measurementMicroorganism based processesBacteroidesNucleic acid detection
The invention relates to probes and a gene chip for pseudomonas aeruginosa nucleic acid detection, and a kit. The invention discloses a group of probes for pseudomonas aeruginosa detection, includingbacterial PAK gene probes 1 and 2 of which the sequences are respectively SEQ ID NO.1 and 2 as well as bacterial Pf4 gene probes 1 and 2 of which the sequences are respectively SEQ ID NO.3 and 4. Theinvention also discloses the gene chip containing the probes and the kit of the gene chip. By optically amplifying hybridization signals through visible light, the signals have a high resolution and can be directly identified. The probes, the gene chip and the kit disclosed by the invention have the advantages that the operation is simple, the manufacturing cost is low, the results are easy to read, on-site quick detection requirements of hospital clinics are met, and the results are accurate and reliable.
Owner:重庆威斯腾生物医药科技有限责任公司
Probes for TORCH detection, gene chip, kit and detection method
PendingCN108285932AMeet the needs of on-site testingSimplify inspection stepsMicrobiological testing/measurementMicroorganism based processesGondii toxoplasmaHerpes simplex virus II
The invention discloses a set of probes for TORCH detection. The probes comprise the following components: a Toxoplasma Gondii TOX probe 1 and 2, wherein the sequences respectively are SEQ ID No.1-2;a rubella virus RV probe 1 and 2, wherein the sequences respectively are SEQ ID No.3-4; cytomegalovirus TOX probe 1 and 2, wherein the sequences respectively are SEQ ID No.5-6; herpes simplex virus Itype HSV I probe 1 and 2, wherein the sequences respectively are SEQ ID No.7-8; herpes simplex virus II type HSV II probe 1 and 2, wherein the sequences respectively are SEQ ID No.9-10. The inventionalso discloses a gene chip, a kit and a detection method thereof containing the probes. Optical amplification of hybridization signals with visible light is carried out, signal resolution is high, andthe signals can be directly interpreted. The probes have the advantages of simple operation, low cost, and easy reading of results; clinic on-site rapid detection demands of hospital are satisfied, and the results are accurate and reliable.
Owner:重庆高圣生物医药有限责任公司
Inspection method and related device
ActiveCN109308235BAvoid detection errorsSimplify inspection stepsFaulty hardware testing methodsAlgorithmReliability engineering
Owner:OPPO CHONGQING INTELLIGENT TECH CO LTD
A method for detecting scale peeling performance of hot-rolled wire rod
The invention provides a method for detecting the scale peeling performance of hot-rolled wire rods. The straightened hot-rolled wire rod samples are clamped on a wire torsion testing machine, and then the samples are twisted 90-180 degrees on one side by using the wire torsion testing machine. °; during the torsion process, the sample fell off due to the poor deformability of the scale, and the scale that fell off was collected, weighed, and recorded as m; the scale that fell off was screened with a 6‑8 mesh sieve, and the large scale that was screened out was screened. The size of the scale is weighed and recorded as m1; the scale peeling performance of the hot-rolled wire rod is evaluated by calculating the peeling performance index (D), D=m1 / m. The invention effectively simulates the continuous bending of the wire rod in different directions in mechanical peeling, and considers the influencing factors of the scale peeling performance evaluation of the wire rod, by introducing the peeling performance index (D), taking into account the scale peeling amount and scale size, It can accurately evaluate the scale peeling performance of the wire rod, and the operation is simple and the result is accurate.
Owner:INST OF RES OF IRON & STEEL JIANGSU PROVINCE +2
A blood storage device
ActiveCN106959235BSimplify inspection stepsImprove stabilityPreparing sample for investigationDrying timeDried blood
Owner:同昕生物技术(北京)有限公司
Concealed earphone detector and detection method thereof
InactiveCN100368825CShorten the timeSimplify inspection stepsDetection using electromagnetic wavesAuditory radiationAcoustic wave
The invention discloses a stealth earphone detector and detecting method, which comprises the following parts: AF electromagnetic emission part, fixed-rate emission circuit, acoustic wave receiving part, frequency-selective acoustic control circuit and main control circuit, wherein the main control circuit controls one or more acoustic frequency electric signal from fixed-rate emission circuit, which drives acoustic electromagnetic wave to send and receive acoustic electromagnetic wave of coil; the electromagnetic wave can be reduced into same-frequency sound by electronic stealth earphone within certain scale; when the microphone picks up sound to excite the frequency-selective acoustic control circuit, the main control circuit judges according to input electric signal of frequency-selective acoustic control circuit due to certain degree acoustic radiation from earphone outsides for electronic stealth earphone.
Owner:凌子龙
TLC identification method for extracts and preparations of Baoyuan decoction and its similar prescriptions
ActiveCN112697949BAvoid separate sample preparationEasy to separateComponent separationPreparing sample for investigationAcetic acidChloroform
Owner:浙江金城阜通制药有限公司
Cutting device and method for setting up and testing the operation preparation of cutting device
InactiveCN101904560BPrevent free spinsSimplify inspection stepsCigarette manufactureEngineeringOperational readiness
The cutting device (1) has a control device (8) aligned and connected with the rotary drives (4,5) of a knife carrier (20) and a tube carrier for controlling, such that it fixes the knife carrier and the tube carrier for setting up and testing the operational readiness of the cutting device in a predetermined base-turn position assigned to the blade position and in a predetermined base-turn position assigned to a tube position. An independent claim is also included for a method for setting and examining operational status of a cutting device.
Owner:HAUNI MASCHINENBAU AG
Checking fixture, inspection method of turbocharger middle casing
ActiveCN113739667BEffective means of monitoringSimplify inspection stepsMechanical clearance measurementsTurbochargerStructural engineering
The invention relates to the technical field of auto parts processing, in particular to a checker, including a reference shaft, on which a centering mechanism and a measuring part are arranged; After passing through the oil inlet hole, it is perpendicular to the outer diameter of the measuring part, so that the measuring rod is displaced in the dial indicator measuring tool. The dial indicator measuring tool displays the measured value according to the displacement of the measuring rod. Comparison of certain values to check whether the middle shell is qualified. A method for detecting a turbocharger middle casing, using the above-mentioned inspection tool, comprising: positioning the middle casing so that the centerline of the reference shaft coincides with the centerline of the bearing hole of the middle casing; the calibration position of the dial gauge gauge; the detection of the dial gauge gauge : Insert the plug-in part of the dial indicator gauge through the oil inlet hole of the middle case, and observe whether the pointer is at the zero position set by the calibration, so as to judge whether the middle case is qualified. The inspection steps are simplified, the inspection efficiency is improved, and the measurement accuracy is improved.
Owner:KEHUA HLDG
Detection tool and turbocharger volute detection method
InactiveCN114812337ASimplify inspection stepsImprove inspection efficiencyMechanical measuring arrangementsTurbochargerEngineering
The invention relates to a testing fixture which comprises a bushing reference shaft, a centering shaft section and a measuring shaft section, the centering shaft section is suitable for being matched with a bushing hole of a volute so that the center line of the centering shaft section can coincide with the center line of the bushing hole, and the center line of the centering shaft section can coincide with the center line of the measuring shaft section. The distance between the outer diameter surface of the highest point on the measuring shaft section and the end surface of the waste gas valve is a distance to be measured; the dial indicator is used for detecting whether the volute is qualified or not. The turbocharger volute detection method adopts the detection tool, and comprises the following steps of: inserting the centering shaft section of the lining reference shaft into the lining hole of the volute; setting the position of the pointer of the dial indicator as a zero position; the dial indicator measuring tool judges whether the middle shell is qualified. The turbocharger volute inspection steps are simplified, and the inspection efficiency is improved.
Owner:KEHUA HLDG
Sampling container for fused metal thermal analysis
InactiveCN1327205CJoint area reductionCurl situation avoidanceWithdrawing sample devicesTesting metalsCooling curveMaterials science
The invention provides a sampling vessel for thermal analysis of molten metal in which the time required for analysis can be shortened and the temperature change rate in eutectic can be reduced as compared with a conventional sampling vessel, so that the eutectic temperature can be obtained easily accurately for a short time. In order to realize the above, the diameter D of a sample chamber 11 is set to be in the range of 16 to 24 mm, the depth L of the sample chamber is set to be 36 mm or more, and the distance LS from an opening 11a of the sample chamber 11 to a temperature sensor 2 is set to be in the range of 7 to 22 mm. Accordingly, the time required for the temperature to reach the eutectic point can be shortened, and the gradient of a cooling curve in eutectic can be reduced.
Owner:K K SUKEWA
urine sample collector
InactiveCN104297016BRaise the liquid levelAvoid pollutionWithdrawing sample devicesSoft materialsEngineering
Owner:CHANGZHOU DEBANG MEDICAL DEVICES
Micro blood detector and detection method for rapid detection of acute myocardial infarction markers
ActiveCN108918889BSimplify inspection stepsAchieve early diagnosisDisease diagnosisBiological testingAntigenSeparation technology
Owner:NANJING TECH UNIV
Consistency check method applied to matrix
InactiveCN103778101AConsistent Performance GuaranteedQuick Consistency CheckComplex mathematical operationsTheoretical computer scienceConsistency index
The invention discloses a consistency check method applied to a matrix. The consistency check method applied to the matrix comprises the steps of (a) calculating and judging product of elements of each row of the matrix, (b) calculating the nth root of Mi, (c) carrying out standard processing, (d) calculating and judging the maximum characteristic root of the matrix, and (e) carrying out consistency check, wherein the consistency check comprises the steps of calculating consistency indexes, calculating and judging random consistency indexes of the matrix, and calculating the random consistency rate. According to the consistency check method, check can be carried out on the consistency of the matrix fast, check steps are simple, check results are accurate, and check cost is lowered greatly.
Owner:江雪连
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