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38results about How to "Avoid quadratic errors" patented technology
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Method for doubly setting and accurately positioning centre of silicon slice
ActiveCN102169822AEliminate errorsAvoid quadratic errorsSemiconductor/solid-state device testing/measurementSemiconductor/solid-state device manufacturingProcess equipmentSilicon
The invention relates to a processing technology of a silicon slice for manufacturing of an integrated circuit, in particular to a method for doubly setting and accurately positioning the centre of the silicon slice. The method comprises the following steps of: rotating the silicon slice along centre direction; identifying edges of the silicon slice sequentially by linear image identification sensors having different precisions; determining positions of a flat edge or a notch; determining the offset of the centre of the silicon slice; and moving the silicon slice by using a bidirectional movement motor to make the centre of the silicon slice overlapped with a designed position. Therefore, a transmission error of the silicon slice existing in processing equipment in the process of semiconductor industry is avoided, and the precision of the set centre of the silicon slice is equal to 1 mu m by using the double-setting method.
Owner:SHENYANG KINGSEMI CO LTD
Automatic detection equipment for circle run-out of rim
PendingCN110132196AImprove handling efficiencyImprove detection accuracyMechanical measuring arrangementsAutomatic test equipmentDrive shaft
The invention discloses automatic detection equipment for circle run-out of a rim. The automatic detection equipment comprises a transportation device for transporting a hub, a workbench for placing the hub, a carrying device for carrying the hub to the workbench, a clamping device for clamping the hub, a positioning device for positioning the hub and a detection device for detecting end part circle run-out and radial circle run-out of the rim; the positioning device comprises a positioning wheel; a positioning shaft has a plurality of types, and the inner end of the positioning shaft is mounted on the positioning wheel through bearings; a positioning boss is arranged at one end of the positioning shaft, and a transmission hole is formed in the other end of the positioning shaft; the transmission hole is matched with a transmission shaft for transmission; a plurality of adjusting seats are arranged on the side wall of the positioning wheel; four groups of jackscrews are uniformly distributed on the side wall of the adjusting seats, and fixed nuts are arranged on the jackscrews; a driving motor is arranged in a positioning box; a positioning air cylinder is fixedly connected to theupper end of a stand column; and end part circle run-out and radial circle run-out of the rim can be simultaneously detected, and the equipment can adapt to hubs of different types and sizes and is relatively high in detection precision.
Owner:ZHEJIANG WANFENG MOTORCYCLE WHEEL
Method for absolutely measuring external quatum efficiency of solar batteries via direct current method
InactiveCN101694511AImprove stabilityGood repeatabilityContactless testingHigh signal intensityElectrical battery
Disclosed is a method for absolutely measuring external quatum efficiency of solar batteries via a direct current method. An optical portion consisting of a xenon light source, a focusing lens and a monochrometer provides monochromatic light, an optical closed bin and a dark room shield stray light so as to provide a work environment of the solar batteries, a source meter detects short circuit photocurrent of sample batteries, a monochromatic light power meter detects power of incident monochromatic light, and a micro-computer performs instrument control and data treatment, thereby finally obtaining a single-wave long external quatum efficiency curve line of the solar batteries. The method focuses on direct-current measurement, is absolute measurement and is adaptable to various types of solar batteries. The method has the advantages of high integration level and being precise, reduces cost of solar battery parameter measuring equipment, overcomes technical shortages in a traditional quatum efficiency measuring method, increases signal strength and precision, can provide more comprehensive battery parameter information, and is used for guiding improvement of the preparation technical and performing study of portions of battery mechanisms.
Owner:NANJING UNIV
Method for predicting nitrogen, phosphorus and potassium contents of black soil by using aviation hyperspectral data
ActiveCN109870419AImprove inversion accuracyAvoid quadratic errorsColor/spectral properties measurementsAviationAlgorithm
The invention belongs to the technical field of information extraction methods, and particularly relates to a method for predicting nitrogen, phosphorus and potassium contents of black soil by using aviation hyperspectral data. The method includes the following steps of: step 1, data preprocessing, namely, preprocessing the hyperspectral data by using an FLAASH algorithm based on an MODTRAN4+ radiation transfer model, and performing abnormal band removal and normalization processing on the spectral data subjected to radiation correction and geometric correction; step 2, spectral parameter calculation, namely, calculating spectral parameter values of 3 categories including 18 subclasses, taking the calculated spectral parameter values as training data, and carrying out modeling with the assay content; and step 3, establishing a model, adopting a principal component analysis method, extracting factors with the maximum correlation between the soil nutrient content and the spectral parameters, establishing a regression equation by using a least square method, finally evaluating root-mean-square errors of a model prediction result, and analyzing the regression effect.
Owner:BEIJING RES INST OF URANIUM GEOLOGY
Internal circulation photoelectric type edge finder
ActiveCN104002198AUndisturbedShort response timeMeasurement/indication equipmentsElectrical resistance and conductanceElectrical battery
The invention relates to an internal circulation photoelectric type edge finder which comprises an end cover, an electric conduction body, a resistor, a double-spring component, an insulation sleeve, a battery, a ceramic gasket and a probe. The electric conduction body is of a cylindrical structure with a circular-ring-shaped baffle ring at one end and unequal-diameter through holes in the middle, the probe is arranged at the end, provided with the baffle ring, of the electric conduction body through the double-spring component in the through holes of the electric conduction body, the end cover is provided with a switch and is connected with the other end of the electric conduction body, the ceramic gasket is arranged between the probe and the electric conduction body and is connected with the electric conduction body, the battery and the resistor are arranged in the through holes of the electric conduction body, the insulation sleeve is arranged between the double-spring component and the inner walls of the through holes of the electric conduction body, and in the working state, the switch, a power source, the resistor, the double-spring component, the probe and the baffle ring form a work loop. According to the edge finder, edge finding operation can be performed on all parts (conductive and non-conductive parts), and the edge finder has the advantages of being simple in structure, short in response time, easy to operate, wide in application range and the like.
Owner:嘉兴市燕知网络科技有限公司
Device and method for measuring characteristic impedance and complex wave number of acoustic material
ActiveCN103091401AEfficient measurementAvoid quadratic errorsAnalysing solids using sonic/ultrasonic/infrasonic wavesSound sourcesConical tube
The invention discloses a device and a method for measuring the characteristic impedance and the complex wave number of an acoustic material. The device comprises an acoustic tube, an impulsive sound source, a microphone, a power amplifier, a signal conditioner, an adapter and a data acquisition device, wherein the acoustic tube consists of a section of large-diameter cylindrical tube, a conical tube and a small-diameter cylindrical tube which are fixedly connected with one another coaxially; three through holes which are vertical to the center axis of the small-diameter cylindrical tube are formed in the side wall of the small-diameter cylindrical tube; the impulsive sound source is arranged in the large-diameter cylindrical tube; and a back cover is in threaded connection with the outer end of the small-diameter cylindrical tube. The method comprises the following steps of: firstly, acquiring a frequency response function of a whole measuring system; secondly, acquiring required excitation signals of the impulse sound source, and exciting the measurement of the impulsive sound source to obtain sound pressures and vibration velocities of front and rear end surfaces of a sample to be tested; and finally, calculating the characteristic impedance and the complex wave number of the sample to be tested. By adopting the method, the problem that the measurement at a low-frequency band is not accurate enough when the characteristic impedance and the complex wave number of a high-flow-resistance material are measured by using the conventional double-cavity method and the conventional double-thickness method is solved.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Method for measuring concentration of non-spherical particles of spouted bed
InactiveCN102608007ARealize partition measurementSolve the phenomenon of redistributionParticle suspension analysisImaging processingImaging analysis
The invention relates to a method for measuring the concentration of non-spherical particles of a spouted bed. The method comprises the following steps of: respectively acquiring the particle concentration of a sparse high-speed region and the particle concentration of a dense low-speed region of the spouted bed through combined application of dynamic image analysis and static bed sampling, wherein during dynamic image analysis, a high-definition digital image is acquired through a high-speed digital CCD (Charge Coupled Device), the image is analyzed frame by frame to position the non-spherical particles to further obtain the particle concentration of a target region, and during static bed sampling, a plugboard box is rapidly inserted into a bed body of the spouted bed from the top to extract the whole bed layer and radially partition the whole bed layer, a comb-shaped board is axially and elastically partitioned to obtain a mixture sample containing the non-spherical particles, and a sample is screened and analyzed to obtain the particle concentration of the target region. On the basis of the traditional bed collapse method, the method disclosed by the invention improves the plugboard / partition board sampling method, organically combines dynamic image processing with the static bed sampling aiming at the bed-type characteristic that the spouted bed is heterogenic in multiple regions of the same spouted bed and realizes partitioned measurement of the particle concentration of the high-speed sparse region and the particle concentration of the low-speed dense region of the spouted bed.
Owner:SOUTHEAST UNIV
Semantic recognition method and device for voice data, storage medium and computer equipment
InactiveCN109871528AAvoid errorsImprove accuracySpeech recognitionSpecial data processing applicationsPart of speechSpeech identification
The invention discloses a semantic recognition method and device for voice data, a storage medium and computer equipment, and the method comprises the steps: converting the obtained voice data into aphonetic text, the phonetic text comprising at least one word voice identifier; preferentially using the near-tone word voice identifier with the maximum weight value to be matched with the word voiceidentifier in the preset dictionary; and under the condition that the near-phonetic word speech identifier with the maximum weight value is not matched with the word speech identifier in a preset dictionary, matching the near-phonetic word speech identifiers with other weights in the near-phonetic word class with the word speech identifiers in the preset dictionary to obtain a text, and performing semantic understanding processing on the text to obtain meanings of the voice data. Through the technical scheme of the invention, the speech recognition accuracy can be improved. According to the embodiment of the invention, the matching efficiency can be improved by adopting the matching mode.
Owner:SHANGHAI XIAOI ROBOT TECH CO LTD
Blood glucose detection system and detection method
InactiveCN108226049ASame sizeClosely arrangedMaterial analysis by optical meansElectricityVenous blood
Provided are a blood glucose detection system and detection method. At present, blood glucose detection is carried out by venous blood glucose detection and capillary blood glucose detection, but thedetection method is inaccurate, and a patient cannot be injected with insulin well according to the blood glucose content. The blood glucose detection system comprises a CPU (1) and an LED circuit (9); the CPU (1) is electrically connected with the LED circuit and a filter circuit (8), the filter circuit is electrically connected with a differential amplifying circuit (7), the differential amplifying circuit is electrically connected with two logarithmic amplifying circuits (6), the logarithmic amplifying circuits are electrically connected with a filter (5), the filter is electrically connected with a Y coupler (4), and the Y coupler is electrically connected with an optical fiber sensor (3). The blood glucose detection system and detection method are used for blood glucose detection.
Owner:HARBIN UNIV
Centering non-deformation hole grinding pitch circle clamp
InactiveCN113182952ARest assured to achieveHigh centering accuracyRevolution surface grinding machinesGrinding work supportsRetainerEngineering
The invention belongs to the technical field of machining, and relates to a centering non-deformation hole grinding pitch circle clamp. The clamp comprises a clamp body, an inner cam is assembled on the clamp body in a centering mode, a plurality of centering spigots and positioning curved surfaces are arranged on the inner wall of the inner cam at intervals, the positioning curved surfaces are distributed in an Archimedes spiral mode, a centering assembly is rotationally arranged in the inner cam and comprises an annular tooth-shaped retainer and a plurality of positioning rods loosely connected to the tooth-shaped retainer, and the positioning rods are in contact connection with the positioning curved surfaces to position a workpiece. The centering non-deformation hole grinding pitch circle clamp has the advantages of being simple in structure, low in price, accurate in centering and free of deformation in workpiece machining.
Owner:WENLING MINGHUA GEAR
Safe and quick method for precisely determining gas-liquid ratio
InactiveCN108489565AThe air source is steady and slowReduce security risksVolume flow proportion measurementAfter treatmentEngineering
The invention relates to a safe and quick method for precisely determining the gas-liquid ratio. The method is implemented by a precise gas-liquid ratio measuring device. The method includes the following specific steps that after a liquid-carrying gas phase enters a flow fine-tuning valve from a pipeline, a gas source with lower pressure and stable and slow flow rate can be obtained; after treatment, the gas source enters the middle of a buffer flask from a gas inlet pipeline and then rapidly expands in the buffer flask, the temperature and the pressure are fully lowered, cooling liquid in the gas inlet pipeline directly drops into a liquid meter, and the remaining fluid is further cooled by a peripheral cooling tank; the separated liquid enters the liquid meter, and the gas phase entersthe gas meter through a gas outlet pipeline. The entire measuring body device including the buffer flask, the liquid meter and a base is designed in an integrated structure. After the measurement is completed, the gas source is turned off, the liquid meter and other main devices are taken out from the liquid nitrogen cooling tank, and the precise gas-liquid ratio can be obtained by directly reading data on the liquid meter and a gas meter when the temperature of the liquid meter and gas meter is restored to room temperature. The process test is safe, and the method is convenient and fast, highin test precision and easy to apply and popularize.
Owner:SOUTHWEST PETROLEUM UNIV
Multi-element geochemical anomaly identification method based on graph attention self-coding
ActiveCN112927767AImprove practicalityAvoid quadratic errorsCheminformatics data warehousingCharacter and pattern recognitionAlgorithmNetwork model
The invention discloses a multi-element geochemical anomaly identification method based on graph attention self-coding. The method comprises the following steps: determining a composition threshold value K; constructing a geochemical element topology network; learning the multi-element geochemical characteristics; reconstructing a multi-element geochemical element background; and calculating multiple abnormal values. According to the method, graph learning is introduced into geochemical exploration anomaly detection, a geochemical element topological relation graph is constructed by using K-nearest neighbor, and a graph attention auto-encoder capable of simultaneously extracting element composition relations and spatial structure features is constructed and trained. The multi-element geochemical background is reconstructed based on the trained graph attention auto-encoder, and an abnormal value of each final sampling point is obtained by calculating . According to the method, an existing neural network model is expanded, so that the model can directly process sampling point data and can be applied to irregular areas, the learning performance of a geochemical exploration background and the practicability of the model are greatly improved, and a practical and reliable geochemical exploration anomaly identification method is provided for complex geological conditions.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)
Complex mode evaluation method of finite element model with damping structure
ActiveCN107292045AAvoid disadvantagesAvoid quadratic errorsDesign optimisation/simulationSpecial data processing applicationsCorrelation coefficientPhase correlation
The invention discloses a complex mode evaluation method of a finite element model with a damping structure. The method includes the steps: firstly, calculating a complex-frequency correlation coefficient according to relative errors of test complex frequencies and simulation complex frequencies, calculating a complex mode amplitude correlation coefficient of test and simulation by the aid of model assurance criterions, and calculating a complex mode phase position correlation coefficient by the aid of defined matrix norms; secondly, performing fuzzification on correlation coefficients of the complex frequencies, complex mode amplitudes and complex mode phase positions by the aid of a trapezoidal membership function to obtain fuzzy relation matrixes of three influencing factors, and performing mathematic operation on the fuzzy relation matrixes and all-order modal weight sets to obtain evaluation results of the influencing factors; finally, performing mathematic operation on the evaluation results and weight sets of the three influencing factors to obtain a comprehensive evaluation value. According to the method, influence of damping on structural response is considered, the method is applicable to correction of models with damping structures, error position identification and dynamic response accuracy of prediction models, calculation methods of the models are normative to implement, and implementation is facilitated by the aid of computer programming.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Round hole construction locating and supporting device of overlapped circulating pipe ditches and construction method
InactiveCN103205953AImprove production accuracyReduce on-site welding workArtificial water canalsArchitectural engineeringRebar
The invention discloses a round hole construction locating and supporting device of overlapped circulating pipe ditches and a construction method. The round hole construction locating and supporting device comprises a lower locating device and a middle locating device, which are cooperatively arranged, wherein the lower locating device and the middle locating device are composed of a series of locating brackets arranged at intervals in parallel, and the adjacent locating brackets are connected into a whole through a connecting rod; the locating bracket of the lower locating device is composed of a concave arc-shaped supporting rod at the upper part, a straight rod at the bottom and an inclined supporting rod located between the concave arc-shaped supporting rod and the straight rod at the bottom; the locating bracket of the middle locating device is composed of an upper cambered supporting rod at the upper part, a lower cambered supporting rod and a middle supporting rod, the upper cambered supporting rod is concave-arc-shaped, and the lower cambered supporting rod is convex-arc-shaped. The technical purpose of accurately locating cambered reinforcing steel bars and internal templates in the hole construction of overlapped circulating pipe ditches to improve the hole construction precision of overlapped water inlet pipelines is achieved.
Owner:CHINA CONSTR SECOND ENG BUREAU LTD +1
Device and method for measuring plate width of cover plate glass
InactiveCN107860290AAvoid waste and reduce productivity issuesIncrease productivityMechanical measuring arrangementsEngineeringGlass sheet
The invention provides a device and method for measuring the plate width of cover plate glass, and belongs to the technical field of cover plate glass production. The device includes measuring supports, measuring sliding blocks and measuring scales; the measuring supports are arranged at two sides of the cover plate glass, the measuring sliding blocks are connected with the measuring supports, andthe measuring sliding blocks can move on the measuring supports along a vertical direction; and the measuring scales are mounted on the measuring sliding blocks, can slide on the measuring sliding blocks along a direction vertical to a cover plate glass conveying path, and are used for measuring the plate width of the cover plate glass. While working, the measuring scales do not contact with thecover plate glass, the problem in the prior art that due to a human error or equipment, scratches more or less occur, causing product waste and reduction of capacity, is solved, the production efficiency is improved, the structure is simple and the operation is convenient.
Owner:CAIHONG GRP SHAOYANG SPECIAL GLASS CO LTD
Method for doubly setting and accurately positioning centre of silicon slice
ActiveCN102169822BEliminate errorsAvoid quadratic errorsSemiconductor/solid-state device testing/measurementSemiconductor/solid-state device manufacturingIntegrated circuit manufacturingProcess equipment
The invention relates to a processing technology of a silicon slice for manufacturing of an integrated circuit, in particular to a method for doubly setting and accurately positioning the centre of the silicon slice. The method comprises the following steps of: rotating the silicon slice along centre direction; identifying edges of the silicon slice sequentially by linear image identification sensors having different precisions; determining positions of a flat edge or a notch; determining the offset of the centre of the silicon slice; and moving the silicon slice by using a bidirectional movement motor to make the centre of the silicon slice overlapped with a designed position. Therefore, a transmission error of the silicon slice existing in processing equipment in the process of semiconductor industry is avoided, and the precision of the set centre of the silicon slice is equal to 1 mu m by using the double-setting method.
Owner:SHENYANG KINGSEMI CO LTD
Answer obtaining method and device for speech data, storage medium and computer equipment
InactiveCN109872718AAvoid errorsAvoid quadratic errorsSpeech recognitionSpecial data processing applicationsComputer equipmentVoice data
Disclosed are an answer obtaining method and device for speech data, a storage medium and computer equipment. The answer obtaining method for the speech data comprises the steps of converting the obtained speech data into a speech identifier text, wherein the speech identifier text comprises at least one word speech identifier; utilizing the word speech identifiers in the speech identifier text for word matching to obtain a character text, wherein the character text comprises semantic identifier words matched with the word speech identifiers; conducting semantic understanding processing on thecharacter text to obtain the semantics of the speech data. By means of the technical scheme, the accuracy of speech and semantic identification can be improved, accurate knowledge points of speech input are obtained accordingly, and the accuracy of obtaining answers from the speech data is improved.
Owner:SHANGHAI XIAOI ROBOT TECH CO LTD
Installation method of complicated group anchors
InactiveCN101761138AIntuitive labelingMeet the installation accuracy requirementsBuilding constructionsSteel barSTEP-NC
The invention provides an installation method of complicated group anchors, which is used for fixing anchor plates to the surface of a substrate material. The method comprises the following steps: step A, leveling a base layer to make the surface smoothness deviation to be less than or equal to + / -1mm; step B, determining drawing positions of a plurality of anchor bolts on the surface of the substrate material according to a design drawing; step C, probing steel bars in the drawing position of each anchor bolt to determine the actual position of the anchor bolt; step D, drilling holes in the actual positions of each anchor bolt on the substrate material, controlling the hole drilling depth with the depth deviation between 0 and 2 mm, and placing the anchor bolts into the holes; step E, pasting PVC plates with the same size as the anchor plates to the anchor bolts, and marking the position of the center point of each anchor bolt on the surface of each PVC plate; step F, drilling holes on the anchor plates according to the actual position distribution maps of the anchor bolts on transfer plates; and step G, installing the anchor bolts, then, pasting the anchor plates to the surface of the substrate material so the end of each anchor bolt passes through the corresponding hole formed on the anchor plates, and installing screw nuts of each anchor bolt.
Owner:CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP
Error calibration method and device
ActiveCN111765906AImprove installation accuracyPrecise positioningMeasurement devicesEngineeringPosition fixing
An embodiment of the invention provides an error calibration method and device, and relates to the field of inertial navigation modules. The error calibration method comprises the steps of: collectingfirst acceleration when a vehicle is located at a first preset position in preset time; rotating a vehicle body of the vehicle by a preset angle to enable the vehicle to be located at a second presetposition, and acquiring second acceleration when the vehicle is located at the second preset position within preset time; calculating a roll error angle and a pitch error angle between a standard coordinate system and an actual coordinate system according to the first acceleration and the second acceleration; calculating a course error angle between the standard coordinate system and the actual coordinate system according to the roll error angle and the pitch error angle; and calibrating the installation error of an inertial navigation module according to the roll error angle, the pitch errorangle and the course error angle. According to the error calibration method and the device, the limitation of a vehicle body rotating method on the weight of the vehicle body is avoided, secondary errors caused by an indirect calibration method are avoided, the installation precision of the inertial navigation module is improved, and the positioning of the inertial navigation module is more accurate.
Owner:三一机器人科技有限公司
Friction force and friction coefficient experiment and measurement device and measurement method
InactiveCN106768519BImproved speed stabilityAdaptive FrictionForce measurementUsing mechanical meansMicrocontrollerMeasurement device
The invention relates to a friction force and friction coefficient experiment and measurement device and method. A measurement end of the measurement device comprises a friction bearing board, a supersonic wave speed measurement sensor, a motor stop switch, a foundation, a circuit board, a single-chip microcomputer, a resistor strain type sensor, an AD converter, a wireless transceiver module, a DC motor, an LED indication lamp, a pulley and a weighing disc, wherein the resistor strain type sensor I is provided with the weight disc, one end of the resistor strain type sensor is provided with the pulley, an output shaft of the DC motor has a coiling wheel, non-elastic wire is wound through the coiling wheel and is then connected with a detected object, a PID algorithm is utilized by the single-chip microcomputer to adjust PWM driven by the motor to pull the detected object to do uniform motion, and a display control end of the measurement device comprises a single-chip microcomputer, a lithium cell, a liquid crystal display screen, a wireless transceiver module, a button, a buzzer and an LED indication lamp. The measurement device is advantaged in that quick, simple, visual and accurate measurement can be realized, not only can the measurement device be applied to physics experiment teaching, but also the measurement device can be applied to professional friction force and smoothness detection.
Owner:LINYI UNIVERSITY
A Method for Predicting the Content of Nitrogen, Phosphorus and Potassium in Black Soil Using Airborne Hyperspectral Data
ActiveCN109870419BImprove inversion accuracyAvoid quadratic errorsColor/spectral properties measurementsBiologyRoot mean square
The invention belongs to the technical field of information extraction methods, and in particular relates to a method for predicting nitrogen, phosphorus and potassium content of black soil using aerial hyperspectral data: Step 1: data preprocessing, using the FLAASH algorithm based on MODTRAN4+ radiation transfer model to preprocess hyperspectral data , remove abnormal bands and normalize the spectral data after radiation correction and geometric correction; step 2: spectral parameter calculation, calculate the spectral parameter values of 3 major categories and 18 subcategories, and the calculated spectral parameter values are used as training data, Modeling with assay content; Step 3: Establish a model, use principal component analysis to extract the factor with the greatest correlation between soil nutrient content and spectral parameters, use the least square method to establish a regression equation, and finally perform a root mean square error on the model prediction results Evaluate and analyze the regression effect.
Owner:BEIJING RES INST OF URANIUM GEOLOGY
Multivariate geochemical anomaly identification method based on graph attention self-encoding
ActiveCN112927767BImprove practicalityAvoid quadratic errorsCheminformatics data warehousingCharacter and pattern recognitionAlgorithmNetwork model
The invention discloses a multivariate geochemical anomaly recognition method based on graph attention self-encoding, comprising the following steps: determination of composition threshold K; construction of topological network of geochemical elements; learning of multivariate geochemical features; background reconstruction of multivariate geochemical elements; value calculation. The present invention introduces graph learning into geochemical anomaly detection, uses K nearest neighbors to construct a topological relationship graph of geochemical elements, and constructs and trains a graph attention self-encoder capable of simultaneously extracting element composition relationships and spatial structure features. Based on the trained graph attention self-encoder, the multivariate geochemical background is reconstructed, and the final outlier value of each sampling point is calculated. The present invention expands the existing neural network model, so that the model can directly process sampling point data and be applied to irregular areas, greatly improves the learning performance of the background of chemical exploration and the practicability of the model, and provides a practical solution for complex geological conditions. Reliable method for identifying anomalies in geochemical exploration.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)
A multi-mirror laser precision splicing calibration method
ActiveCN109877319BAvoid quadratic errorsHigh precisionIncreasing energy efficiencyImage data processing detailsEngineeringComputational physics
Owner:XIAN BRIGHT ADDTIVE TECH CO LTD
Multi-face prism, lidar including multi-face prism, and method of manufacturing multi-face prism
PendingCN113552661ASimple structureImprove performancePrismsWave based measurement systemsEngineeringPrism
The invention discloses a multi-face prism which comprises a prism body made of glass, the prism body comprises three or more reflecting faces, a first end face formed by intersecting with the three or more reflecting faces, and a second end face opposite to the first end face. The included angle between the reflecting surface and the first end surface is 90 degrees or less than 90 degrees. The multi-face prism provided by the invention can be finished through one-time processing by a mould pressing integral forming process, and does not need to be processed for more than two times.
Owner:NINGBO SUNNY AUTOMOTIVE OPTECH
A bend pipe shape detection system and detection method thereof
ActiveCN104368632BAvoid quadratic errorsHigh precisionMetal working apparatusNumerical controlPipe fitting
Owner:NINGBO TRIZ AUTOMATIC EQUIP
Universal AC measurement method for external quantum efficiency of solar battery
InactiveCN101710171BImprove stabilityGood repeatabilityElectrical testingPhotometry using electric radiation detectorsHigh signal intensityElectrical battery
Owner:NANJING UNIV
An Image Deblocking Filter Method Based on Second Order Gradient
ActiveCN109218738BReduced responseAvoid affecting coding efficiencyDigital video signal modificationPattern recognitionImaging processing
The invention belongs to the field of image processing, and provides a deblocking filter method based on the second-order gradient of the image, which uses the second-order gradient characteristics of the pixels on both sides of the compressed image block boundary to reasonably adjust the compressed pixels, thereby realizing The smoothing of image block boundaries can effectively remove the block effect existing in image compression. At the same time, the filtering method of the present invention makes full use of the second-order gradient change characteristics of the image block boundary, thereby effectively retaining the original features of the image and preventing the loss of image detail information caused by filtering. The filtering method of the present invention has high application value in the actual processing of compressed images because of its low computational complexity and obvious effect.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Device for measuring sound absorption coefficient of acoustic material by use of pulse method and measuring method
ActiveCN103105433BEfficient measurementOvercoming Phase Matching ProblemsAnalysing solids using sonic/ultrasonic/infrasonic wavesSound sourcesConical tube
The invention provides a device for measuring the sound absorption coefficient of an acoustic material by use of a pulse method and a measuring method. The device comprises a sound tube, a pulse sound source, a microphone, a power amplifier, a signal conditioner, an adapter and a data acquisition device, wherein the sound tube is formed by coaxially and fixedly connecting a large-diameter cylindrical tube, a conical tube and a small-diameter cylindrical tube in sequence; two through holes vertical to the central axis of the small-diameter cylindrical tube and used for mounting the microphone are formed on the side wall of the small-diameter cylindrical tube; the pulse sound source is mounted in the large-diameter cylindrical tube; and the outer end of the small-diameter cylindrical tube is in threaded connection with a rear cover. The measuring method comprises the following steps of: obtaining a frequency response function of the whole measuring system; obtaining an excitation signal spectrum of the required pulse sound source; and exciting the pulse sound source by use of the excitation signal of the required pulse sound source and measuring to obtain the sound absorption coefficient of a to-be-measured sample. The device and method provided by the invention avoid secondary error caused by decomposing a sound field in a frequency domain in the traditional method, and also overcome the problem of phase matching in the traditional multi-microphone method.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
An Intelligent Wrench Control System
ActiveCN110142719BPrecise final tightening torqueAvoid quadratic errorsSpannersWrenchesControl systemControl engineering
The invention belongs to the technical field of connection and fastening, and relates to an intelligent wrench control system. The intelligent wrench control system comprises a power source, a torquecontroller, a power wrench and a torque measurement feedback sleeve, wherein the power source is connected with the power wrench through the torque controller, the power wrench rotates a target fastener by sleeving the torque measurement feedback sleeve, the torque controller is connected with the torque measurement feedback sleeve in wireless mode, the torque measurement feedback sleeve is used for collecting real-time torque data, and feeds the collected torque data back to the torque controller, and the torque controller controls intensity and blocking and unblocking of power output from the power source to the power wrench. The intelligent wrench control system performs accurate fastening work by presetting torque value of the target fastener, improves accuracy and efficiency of the fastening work, and is easy and convenient to operate, and accurate and rapid in target torque fastening work.
Owner:咸阳赛亚思科技有限公司
Installation method of complicated group anchors
InactiveCN101761138BIntuitive labelingMeet the installation accuracy requirementsBuilding constructionsSteel barSTEP-NC
The invention provides an installation method of complicated group anchors, which is used for fixing anchor plates to the surface of a substrate material. The method comprises the following steps: step A, leveling a base layer to make the surface smoothness deviation to be less than or equal to + / -1mm; step B, determining drawing positions of a plurality of anchor bolts on the surface of the substrate material according to a design drawing; step C, probing steel bars in the drawing position of each anchor bolt to determine the actual position of the anchor bolt; step D, drilling holes in the actual positions of each anchor bolt on the substrate material, controlling the hole drilling depth with the depth deviation between 0 and 2 mm, and placing the anchor bolts into the holes; step E, pasting PVC plates with the same size as the anchor plates to the anchor bolts, and marking the position of the center point of each anchor bolt on the surface of each PVC plate; step F, drilling holes on the anchor plates according to the actual position distribution maps of the anchor bolts on transfer plates; and step G, installing the anchor bolts, then, pasting the anchor plates to the surface of the substrate material so the end of each anchor bolt passes through the corresponding hole formed on the anchor plates, and installing screw nuts of each anchor bolt.
Owner:CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP
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