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96 results about "Nonlinear deformation" patented technology
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Non-linear morphing of faces and their dynamics
InactiveUS6967658B2Geometric image transformationCathode-ray tube indicatorsMorphingNonlinear deformation
A method and apparatus is disclosed in which one or more standard faces are transformed into a target face so as to allow expressions corresponding to the standard face(s) to be used as animation vectors by the target face. In particular, a non-linear morphing transformation function is determined between the standard face(s) and the target face. The target face animation vectors are a function of the morphing transformation function and the animation vectors of the standard face(s).
Owner:AUCKLAND UNISERVICES LTD
Intelligent NC super high pressure true 3D uneven loading and unloading and pressure stabilizing model test system
ActiveCN108124460AHigh loading accuracyLong stabilization timeUnderground chambersMaterial strength using tensile/compressive forcesUltra high pressurePilot system
Owner:SHANDONG UNIV
Deformable convolutional neural network-based infrared image object identification method
InactiveCN108564025AEasy to identifyOptimal pooling template valueCharacter and pattern recognitionNeural architecturesNonlinear deformationRate parameter
The invention discloses a deformable convolutional neural network-based infrared image object identification method. The method comprises the steps of constructing a training set and a test set; establishing a convolutional neural network architecture; adding a softmax classifier to the last layer, and setting an objective function; performing sampling by adopting a convolution kernel of linear ornonlinear deformation; performing pooling operation in a pooling layer by adopting a rule block sampling-based ROI pooling method which is the best in the industry at present; setting learning rate parameters according to experience; and easily performing standard back propagation end-to-end training, thereby obtaining a deformable convolutional neural network. An experiment proves that the spatial geometric deformation learning capability is introduced in the convolutional neural network, so that an identification task of an image with spatial deformation is better finished; the geometric transformation modeling capability of the convolutional neural network and the effectiveness of target detection and visual task identification are improved; and dense geometric deformation in space issuccessfully learnt.
Owner:GUANGDONG POWER GRID CO LTD +1
Method and system for the automated temporal subtraction of medical images
InactiveUS20020097901A1Enhance interval changeIncrease changeImage enhancementImage analysisNonlinear deformationComputed tomography
Method and system for the detection of interval change in medical images. Three dimensional images, such as previous and current section images in CT scans, are obtained. An anatomic feature, such as the lungs, is used to select sections containing lung by a gray-level thresholding technique. The section correspondence between the current and previous scans is determined automatically. The initial registration of the corresponding sections in the two scans is achieved by a rotation correction and a cross-correlation technique. A more accurate registration between the corresponding current and previous section images is achieved by local matching. A nonlinear warping process which is also based on the cross-correlation technique is applied to the previous image to yield a warped image after the matching. The final subtracted section images were derived by subtracting of the previous section images from the corresponding current section images. Interval changes such as a change in tumor size and a newly developed pleural effusion are enhanced significantly.
Owner:UNIVERSITY OF CHICAGO
Device for testing model with three-dimensional gradient nonuniform loading structure
InactiveCN101539491ALoad bigLarge loading valueStructural/machines measurementNonlinear deformationModel testing
The invention relates to a device for testing a model with a three-dimensional gradient nonuniform loading structure, which comprises a table-shaped gradient nonuniform loading device and an opposite force loading device, wherein the opposite force loading device is connected with the table-shaped gradient nonuniform loading device which is arranged in the opposite force loading device; and a table-shaped gradient loading module of the table-shaped gradient nonuniform loading device is tightly attached to the surface of a testing model. Because the deep underground chamber engineering in the fields of hydroelectric power, traffics, power sources, resources and defense construction usually lies in three-dimensional loading states which are nonuniformly distributed in a gradient, the table-shaped gradient loading module is arranged on the surface of the model, thus the model testing device achieves the three-dimensional gradient nonuniform loading of an underground structure model and more truly discloses the nonlinear deformation characteristics and failure mechanisms of wall rocks of the deep underground chamber through the testing of the three-dimensional gradient nonuniform loading structure model so as to more reasonably evaluate the stability of the wall rocks of the underground chamber and take effective reinforcement measures, thereby having a quite important significance to guiding the design and the construction of the deep underground engineering and guaranteeing the safety of the deep underground engineering.
Owner:SHANDONG UNIV
N-phasic element method for calculating a fully coupled response of multiphase compositional fluid flow and a system for uncertainty estimation
ActiveUS8255195B2Electric/magnetic detection for well-loggingComputation using non-denominational number representationElement modelHeat flow
Owner:YOWAREN ELAN
Method for correcting geometric distortion of text image
ActiveCN102208025AAchieve correctionSimple thinkingCharacter and pattern recognitionNonlinear deformationAlgorithm
The invention provides a method for correcting geometric distortion of a text image. The method comprises the following steps of: extracting a text row, in a horizontal direction, of the text image, fitting the text row by using a B-spline curve to obtain a text row curve; estimating a vanishing point of a cylindrical surface straight bus, a text row tangent convergence line and a focal length parameter of a camera by using the tangent convergence symmetry of the text row curve; constructing latitude lines of an isometric grid for the fit text row curve by adopting a crossratio interpolation value; estimating a directrix of the cylindrical surface by using similar perspective projection transformation of the text row curve and constructing longitude lines of the isometric grid; estimatinga length-to-width ratio of the isometric grid by using the text row curves at the top end and the bottom end of the image; and mapping meshes of each isometric grid into a square grid through a deformation technology based on the grid to finish the correction of the geometric distortion of the text image. By the method, the problem that perspective distortion, nonlinear deformation distortion andcompound distortion of the perspective distortion and the nonlinear deformation distortion cannot be corrected at the same time in the prior art can be solved; therefore, total correction of the geometric distortion of the text image shot by the camera can be realized.
Owner:INST OF AUTOMATION CHINESE ACAD OF SCI
N-phasic element method for calculating a fully coupled response of multiphase compositional fluid flow and a system for uncertainty estimation
ActiveUS20100250206A1Electric/magnetic detection for well-loggingComputation using non-denominational number representationHeat flowElement model
In an exemplary embodiment, a method is disclosed for developing an N-phasic finite element model for performing fully coupled analyses of multi-phase compositional fluid flow and heat flow in nonlinearly deforming porous solid media with time-dependent failure. The method can include formulating a finite element model of the behavior of a coupled solid-fluid formation, having complex geometry and behavior, and applying the model to derive the response of the formation in the form of one or more displacement fields for the solid phases and one or more pressure fields for the fluid phases in a zone of interest in a formation. In an exemplary embodiment, a system is disclosed for estimating the uncertainties in the derived displacement and pressure field solutions for the response of the fully coupled solid-fluid phases.
Owner:YOWAREN ELAN
Method, device and system for measuring skew deformation amount of tower of wind generating set
InactiveCN102589512AAccurate non-linear deformation curveLow costMeasurement devicesElectricityNonlinear deformation
The invention provides a method, a device and a system for measuring the skew deformation amount of a tower of a wind generating set. The method comprises the following steps of: acquiring a skew angle which is measured by a skew sensor and an acceleration which is measured by an acceleration sensor on the tower; according to the skew angle and the acceleration, which are measured, acquiring the static deformation amount, quasi-static deformation amount and dynamic deformation amount of the tower; according to the static deformation amount, quasi-static deformation amount and dynamic deformation amount of the tower, determining a skew deformation equation of the tower, wherein the skew deformation equation comprises a static and quasi-static deformation equation and a dynamic deformation equation; and according to the skew deformation equation of the tower, determining a skew deformation curve of the tower. By adoption of the technical scheme, a nonlinear deformation curve of the tower can be obtained, and accuracy in measurement of the skew deformation amount of the tower is improved.
Owner:赤峰华源新力科技有限公司
Method and system for matching MR image feature points before and after nonlinear deformation of biological tissue
ActiveCN106530338AReduce in quantityReduce complexityImage enhancementImage analysisNonlinear deformationKernel method
The present invention relates to a method and a system for matching MR image feature points before and after the nonlinear deformation of a biological tissue. According to the technical scheme of the invention, a feature point automatic detection method based on a depth-cascaded convolutional neural network is provided. According to the method, firstly, a general region of feature points is obtained through the first layer of the depth convolutional network. Secondly, the position of a target feature point is approximated step by step in the second and third layers of the cascade convolutional network, so that the detection rate of feature points is further improved. The method aims to solve the problem in the prior art that the feature point distinguishing ability is reduced due to the image nonlinear deformation of existing feature point descriptors. In this way, a Riemannian manifold is combined with the kernel method to construct a nonlinear deformation feature point descriptor for robustness. The three-dimensional feature points of a magnetic resonance image are mapped into a four-dimensional Riemannian manifold space. Meanwhile, the feature points are further mapped into a higher-dimensional Hilbert space based on the kernel method, so that a richer description of data distribution is obtained. Meanwhile, a real geometric distance between feature points is obtained, so that the feature points are matched.
Owner:WUHAN TEXTILE UNIV
Image correction method suitable for bending deformation two-dimensional code
ActiveCN107679436AImplement Adaptive CorrectionPrecise positioningImage analysisSensing by electromagnetic radiationGraphicsNonlinear deformation
The invention discloses an image correction method suitable for a bending deformation two-dimensional code, and specially aims at the problem of two-dimensional code nonlinear deformation because of the photographing angle and the bending surface. The method is mainly divided into two steps of a two-dimensional code area extraction and bending deformation correction. The step of two-dimensional code area extraction comprises two-dimensional code image preprocessing, two-dimensional code position detection pattern positioning and two-dimensional code closed extraction. The step of bending deformation correction comprises original image reference corresponding point extraction, standard image reference corresponding point extraction and construction of a bending deformation correction transformation model. The two-dimensional code corner point detection method is improved by using the slope and intercept knowledge of plane geometry to realize accurate positioning of the two-dimensional code corner points, a "roller" method is designed to solve the edge points of the bending deformation two-dimensional code, and the side length relationship of the two-dimensional code and the positiondetection pattern is calculated through combination of curve fitting to construct the transformation model so that adaptive correction of the bending deformation two-dimensional code under the general condition can be realized.
Owner:广东国玉科技股份有限公司
Method and apparatus for nonlinear anamorphic scaling of video images
InactiveUS20070076020A1Control amountThe location is limitedGeometric image transformationCathode-ray tube indicatorsNonlinear deformationNonlinear scaling
Methods and apparatuses for nonlinear scaling of video images. To match the aspect ratios of a video image and the target display area, at least one embodiment of the present invention scales the video image according to one or more nonlinear functions along the horizontal direction and / or the vertical direction. In one embodiment, the nonlinear functions are such that the original aspect ratio of the video image is preserved near the center region (or strip) of the image and the image is gradually stretched (or compressed) as it is mapped to the edges. In one example, the scaling is implemented by the texture mapping functionality of OpenGL using graphics hardware. In one embodiment of the present invention, the nonlinear mapping is constructed according to a polynomial mapping; and, the coefficients of the polynomial are adjustable by a user to trade off distortion between the image center and the image edges, giving the user control over the location and the amount of distortion.
Owner:APPLE INC
Controllable dynamic shape interpolation method with physical third dimension
InactiveCN101833785AImprove visual effectsEnhanced physical realism3D-image renderingDeformation effectDecomposition
The invention discloses a controllable dynamic shape interpolation method with physical third dimension. According to the method, a rotation-strain space definition is provided, and a set of conversion mode from a three-dimensional model to a rotation-strain space coordinate is established, so that the primary nonlinear deformation can be expressed by linear operation of the coordinate in the rotation-strain space; and the method greatly reduces the algorithm complexity and improves the solving efficiency by combining the traditional mode shape decomposition to perform dimension reduction. The method comprises the following steps of: decomposing a base vector acquired by the traditional mode shape decomposition into rotation and strain parts, and constructing a deformation subspace by using rotation-strain corresponding to the main component bases; obtaining a rich dynamic deformation effect by editing and regulating mode shape coordinate motion interpolation curve parameters in the subspace; and finally, obtaining a new model pose sequence through a reconstruction process according to the interpolated mode shape coordinate.
Owner:ZHEJIANG UNIV
Arch dam safety evaluation method based on structural strength, foundation skid resistance and overall stability
InactiveCN106906785AReflect structural featuresGeometric CADHydraulic engineering apparatusNonlinear deformationSafety control
The invention discloses an arch dam safety evaluation method based on structural strength, foundation skid resistance and overall stability, and relates to the field of arch dam safety control analysis and design. The arch dam structural strength safety coefficient K1 is obtained by calculating the ratio of the strength allowed to be used for arch dam large-size concrete to the pressure stress calculated through the multi-arch beam method revised after considering influences of the calculation parameter and other factors, and the given evaluation standard is more reasonable and credible. The arch dam foundation skid resistance safety evaluation is conducted by giving possible sliding block modes such as large sliding blocks, small sliding blocks and stepped sliding blocks and the application guide and the control index K2 of the calculation formula on the basis of the rigid limit equilibrium method. The arch dam overall safety evaluation method includes the step that overload coefficient control indexes such as structure cracks and nonlinear deformation are given by conducting experimental research on the basis of a three-dimensional nonlinear finite element method and a geomechanics model and further increasing the overload capacity and the overload coefficient K3 of the water unit weight on the basis of the basic combination effect. An arch dam static force design safety evaluation system is formed by K1, K2 and K3 evaluation mentioned above.
Owner:CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
Longitudinal Image Registration Algorithm For Infrared Images For Chemotherapy Response Monitoring And Early Detection Of Breast Cancers
ActiveUS20130004035A1Maximizing mutual informationMore informationImage enhancementImage analysisNonlinear deformationMutual information
This algorithm provides a marker-free approach to establishing the pixel correspondence among the IR images taken at different times, which is the basis for quantitatively characterizing the variation of the heat energy and patterns pixel-wise on a breast surface. The idea is to use the corner points of the heat pattern and the branch points of the skeletons of the heat pattern on the body surface as the initial fiducial points for the longitudinal IR image registration. The Thin-Plate Spline technique is used to model the nonlinear deformation between two IR images taken at two different times. Mutual information between the TPS-transformed image and the target image is employed as the metric quantifying the quality of the longitudinal IR image registration. To optimize the registration, Nelder-Mead simplex method is used to locally modify the pairings of the fiducial points in the source and target IR images to maximize the mutual information.
Owner:NAT TAIWAN UNIV
A Fingerprint Matching Method Based on Multiple Reference Point Pairs
InactiveCN102262730AOvercoming nonlinear deformation problemsNonlinear Deformation Problem SolvingCharacter and pattern recognitionFeature vectorNonlinear deformation
The invention discloses a fingerprint matching method based on multiple reference point pairs, which comprises the following steps: determining template fingerprints and input fingerprints, acquiring the matching scores of every detailed point pair by a fingerprint matching algorithm based on three-value characteristic vector, and ranking all the detailed point pairs according to the matching scores in a descending order; selecting the first m detailed point pairs as the initial reference point pairs, and computing the rotation / translation parameters of the initial reference point pairs; selecting the reference point pairs according to the conformity, carrying out global matching by using each reference point pair as the reference to acquire a matched detailed point pair set, and fusing information of all the matched detailed point pair sets by using a voting fusion strategy; and acquiring the number of final matched detailed point pairs, computing the matching scores according to thenumber of final matched detailed point pairs, and judging whether the template fingerprints are matched with the input fingerprints according to the matching scores and the matching threshold. The invention overcomes and solves the problem of nonlinear deformation of fingerprints in the existing fingerprint matching algorithm, and has favorable fingerprint matching performance.
Owner:SHANDONG ZHIHUA INFORMATION TECH
Method for controlling deformation of large broken rock zone roadway by using multi-steel stranded wire combined supporting device
ActiveCN103711507AAdapt to non-linear deformationMobilize carrying capacityAnchoring boltsNonlinear deformationClassical mechanics
The invention relates to a method for controlling deformation of a large broken rock zone roadway by using a multi-steel stranded wire combined supporting device. The method includes the steps of determining damage conditions of surrounding rock of the roadway by combining various methods, building a roadway surrounding rock shallow portion bearing ring through anchoring and shotcreting combined support, and mobilizing deep portion elastic-state surrounding rock bearing capacity through the multi-steel stranded wire combined supporting device. The multi-steel stranded wire combined supporting device is divided into an anchoring section, a free section, a sealing section and an exposed section. By the method, high supporting strength and deep supporting range can be realized at the same time, and the shallow portion bearing ring and deep portion elastic-state surrounding rock are connected into a whole; original elongation rate is still maintained after slip casting of steel stranded wires, and the method is suitable for continuous long-time nonlinear deformation of the surrounding rock; by using the method to perform surrounding rock reinforcement control on the large broken rock zone, long-time stability of the roadway can be realized, engineering quantity in multiple rebuilding of the roadway can be reduced, and the method has wide practicability.
Owner:CHINA UNIV OF MINING & TECH
Deep oil and gas reservoir hydraulic fracture propagation numerical simulation method
PendingCN112036098AAccurate guidanceAccurate predictionFluid removalDesign optimisation/simulationNonlinear deformationMathematical model
The invention discloses a deep oil and gas reservoir hydraulic fracture propagation numerical simulation method which comprises the following steps: acquiring natural fracture distribution information, generating a discrete natural fracture system geometric model, determining hydraulic fracture propagation simulation related parameters according to actual engineering problems, establishing a deepoil and gas reservoir hydraulic fracture propagation mathematical model, carrying out numerical calculation based on the model to obtain a numerical simulation result, and carrying out fracturing effect analysis according to the numerical simulation result. According to the method, the elastic-plastic constitutive equation is adopted to describe rock nonlinear deformation in the deep oil and gas reservoir fracturing process, fluid flow in a shaft, fluid flow in a crack and fluid flow in a matrix are coupled, accurate simulation of the hydraulic fracture propagation process of the deep oil andgas reservoir is achieved, quantitative analysis is conducted on the fracturing effect, and an effective means is provided for prediction, evaluation and optimization of artificial fracturing of the deep oil and gas reservoir.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
Calculation method for stratum initial cracking pressure of deep shale
The invention discloses a calculation method for the stratum initial cracking pressure of deep shale, and belongs to the technical field of exploration. The calculation method for the stratum initial cracking pressure of the deep shale is used for calculating the stratum initial cracking pressure of the deep shale and comprises the steps that the size of a casing pipe, the size of a cement loop and the size of a borehole are acquired, and a stratum-shaft-perforation three-dimensional model is constructed by combining perforation parameters; material attributes are given to the stratum-shaft-perforation three-dimensional model on the basis of material parameters of the casing pipe and the cement loop and stratum rock mechanical parameters, wherein the stratum rock mechanical parameters have the transverse isotropic homogeneity characteristic and the nonlinear deformation characteristic; boundary loads are applied to the stratum-shaft-perforation three-dimensional model, and the stratum initial cracking pressure is obtained.
Owner:CHINA PETROLEUM & CHEM CORP +1
Near-beta titanium alloy with low elastic modulus and high strength and preparation method of near-beta titanium alloy
InactiveCN103060609AImproved cold working propertiesLow work hardening rateMedical equipmentNonlinear deformation
The invention provides a Ti-Nb-Mo-Sn near-beta titanium alloy with low elastic modulus and high strength. The alloy comprises the following chemical components in percentage by weight: 15-35% of niobium, 1-8% of molybdenum, 1-8% of stannum and 0-1.2% of titanium dioxide powder. The Ti-Nb-Mo-Sn near-beta titanium alloy with low elastic modulus and high strength has the beneficial effects that the systemic alloy has good cold machining performance and a low machining cementation index and can coldly deform in a large scale by using cold machining processes such as cold rolling, cold wire drawing and the like; the systemic alloy has the characteristic of nonlinear deformation after being thermally machined or coldly machined and has large restorable elastic strain, low initial modulus and average modulus and high strength; the systemic alloy has low elastic modulus, high yield strength and breaking strength and high linear elasticity after being smelted, thermally machined or coldly machined and thermally treated; and the systemic alloy can be used for preparing medical equipment, physical training equipment and industrial equipment, and can be used for biomedical applications such as artificial bones, bone joints, implanted tooth roots, bony plates and the like.
Owner:BEIHANG UNIV
Power Harvesting Scheme Based on Piezoelectricity and Nonlinear Deflections
InactiveUS20120068577A1Piezoelectric/electrostrictive device manufacture/assemblyPiezoelectric/electrostriction/magnetostriction machinesElectricityNonlinear deformation
An energy harvesting device (FIG. 1) and a method of using the energy harvesting device to generate an electrical charge are described. The energy harvesting device comprises a mass (2) and at least two tethers (4, 6, S and 10), at least one of which comprises a piezoelectric material that is mechanically stressable upon deflection of the at least two tethers. Each of the tethers comprises a first end (12) coupled to the mass (2) and a second end (14) copied to a reference structure (16), and the tethers are arranged about the mass such that the mass is moveable within a straight line path relative to the reference. The movement of the mass causes the deflection of the tethers, resulting in the generation of an electric charge. The device is preferably operable at the microscale.
Owner:KOSER HUR +1
Robust target tracking method based on phantom adversarial network
The invention discloses a robust target tracking method based on a phantom adversarial network, and relates to a computer vision technology. The method comprises the following steps: firstly, proposing a new illusion confrontation network, aiming at learning nonlinear deformation between sample pairs, and applying the learned deformation to a new target to generate a new target deformation sample.In order to effectively train the proposed phantom confrontation network, deformation reconstruction loss is proposed. The invention provides the target tracking method based on the illusion confrontation network based on the offline training, and the method can effectively alleviate the overfitting problem of the deep neural network in the target tracking process due to the online updating. In addition, in order to further improve the deformation migration quality, a selective variable migration method is provided, and the tracking precision is further improved. The target tracking method provided by the invention obtains a competitive result on the current mainstream target tracking data set.
Owner:XIAMEN UNIV
Method and apparatus for nonlinear anamorphic scaling of video images
InactiveUS7417649B2Control amountThe location is limitedGeometric image transformationCathode-ray tube indicatorsNonlinear deformationNonlinear scaling
Owner:APPLE INC
System and method for electronically combining images taken by two or more adjacent image sensors
ActiveUS20080212825A1Low costSmall sizeTelevision system detailsGeometric image transformationCMOSNonlinear deformation
An apparatus comprising two or more adjacent wide angle cameras, such as CMOS cameras, for imaging a document, and methods for combining corresponding images into one image while correcting radial, scale, rotation, translation and other linear or nonlinear deformations.
Owner:ACUANT
Pressure sensor structure of compound diaphragm
InactiveCN101726384AReduce nonlinear deformationReduce non-linearityFluid pressure measurement using elastically-deformable gaugesNonlinear deformationOptoelectronics
The invention relates to a pressure sensor structure of a compound diaphragm, comprising a monocrystalline silicon layer and a porous silicon layer, wherein one side of the monocrystalline silicon layer is concave and the porous silicon layer grows on the concave inner surface of the monocrystalline silicon layer. On the premise that the sensitivity of a low-range sensor is not influenced, the compound diaphragm of porous silicon and monocrystalline silicon is adopted for reducing the nonlinear deformation of the diaphragm, thereby reducing the flexibility of the diaphragm and finally achieving the purpose of enhancing the sensitivity or reducing the nonlinearity of the low-range sensor.
Owner:INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
Anti-Fatigue Mat/Shock Pad
ActiveUS20180368604A1Easy to drainNon-linear characteristicGround pavingsFloor coveringsNonlinear deformationEngineering
An anti-fatigue mat / shock pad has a mat body with a top surface, a bottom surface, a left side edge, a right side edge and a top and bottom edges. The top and bottom surface of the mat have raised regions thereon which are made up of longitudinally extending raised ribs arranged in parallel fashion with respect to one another and spaced apart a selected distance by longitudinal channels. The longitudinal ribs on the top surface are offset from the longitudinal ribs on the bottom surface in an alternating fashion so that they present a staggered array when viewed in cross section. This particular pattern of raised ribs on the top and bottom surfaces of the mat produces a non-linear deformation pattern under impact forces in use, such as would be caused by athletes running or jumping on an athletic field.
Owner:S & B TECHN PRODS
Printed circuit board manufacturing system and manufacturing method thereof
InactiveUS20090026169A1Improve consistencyDecorative surface effectsCircuit board tools positioningInsulation layerNonlinear deformation
A printed circuit board manufacturing system and a manufacturing method thereof are disclosed. A method of manufacturing printed circuit board, comprising: providing a substrate that comprises a pad and an insulation layer covering the pad; acquiring an image of the substrate; acquiring location information of the pad by analyzing the image of the substrate; forming a via hole by removing a part of the insulation layer that corresponds the location information of the pad; and forming a via by filling the via hole with a conductive material, provides improved process conformity, even if the substrate has partial or nonlinear deformation, by considering the location information of the pad in the via hole forming. The improved conformity may allow more flexibility to substrate design and more integrity for circuitries on printed circuit board.
Owner:SAMSUNG ELECTRO MECHANICS CO LTD
Optical fiber sensor capable of measuring stress-strain of metal accurately
ActiveCN103438817AImprove long-term stabilityHigh precisionUsing optical meansNonlinear deformationOptical fiber cable
The invention relates to an optical fiber sensor capable of measuring stress-strain of metal accurately. The optical fiber sensor comprises a strain elastic beam provided with a first measuring fixing end and a second measuring fixing end. The connecting line of the first measuring fixing end and the second measuring fixing end is perpendicular to an axis of an optical fiber. Due to the fact that the optical fiber sensor capable of measuring the stress-strain of metal accurately adopts the structure, creep deformation caused by a traditional gluing method is changed, and long-term stability of a zero point is improved. The output of the optical fiber installed on a tested metal structural body is hardly affected by the changes of the environment temperature, and secondary compensation does not need to be carried out by utilizing an additional temperature measuring sensor. The transverse sensitivity of the optical fiber is reduced, the optical fiber is sensitive only about the stain of the strain elastic beam in the measuring direction, and the optical fiber can have good strain measurement single-direction performance. The rigidity of a strain transmission interface is guaranteed through the technology that the strain elastic beam is directly welded to the tested metal structural body, and creep deformation and non-linear deformation of the strain transmission interface are removed.
Owner:SHANGHAI BAIANTEK SENSING TECH CO LTD
Data post-processing method and system for dam and landslide deformation GB-SAR monitoring
PendingCN112685819AReduce difficultyRemove atmospheric disturbanceGeometric CAD3D modellingNonlinear deformationInformation analysis
A data post-processing method for dam and landslide deformation GBSAR monitoring comprises the steps of obtaining N monitoring image subsets, processing the interiors of the image subsets, and obtaining N average images; taking one average image as a main image and the rest N1 average images as slave images to carry out interference processing to obtain N1 interference images; selecting a PS point, and establishing a Delaunay triangulation network; carrying out differential phase modeling and parameter estimation on each PS point; calculating according to the estimated linear deformation rate increment and residual phase increment to obtain linear deformation and nonlinear deformation corresponding to each PS point; and adding the linear deformation amount and the nonlinear deformation amount to obtain an overall deformation amount, and obtaining a dense deformation field of the whole monitoring object in a global range by adopting an interpolation mode. The data post-processing method provided by the invention solves the data analysis problems of long long-period monitoring time baseline and large information amount of dams and landslides, and is good in adaptability and high in precision in global space deformation monitoring information analysis.
Owner:SICHUAN UNIV
Time difference baseline set time series interferometric SAR (Synthetic Aperture Radar) processing method
ActiveCN110018476AVerify feasibilityVerify validityRadio wave reradiation/reflectionTerrainNonlinear deformation
The invention discloses a time difference baseline set time series interferometric SAR (Synthetic Aperture Radar) processing method, which is characterized in comprising the following steps that: carrying out time difference interferometric processing on (N+1) pieces of SAR images of which the scenes are registered to form an interferometric pair; utilizing an external evaluation model to determine the terrain phase position and the flat ground phase position of a processing region for removing the terrain phase position and the flat ground phase position of the processing region; according tothe formed interferometric pair, determining a spatial baseline; through a one-dimensional regression way, determining elevation correction; through the one-dimensional regression way, determining deformation; and obtaining an atmospheric phase position and nonlinear deformation, and through the elevation correction and deformation resolution, determining linear deformation, nonlinear deformation, atmospheric phase position and an elevation correction semaphore. By use of the method, an adjacent image is used for effectively avoiding the influence of time de-coherence and improving processingaccuracy, two-dimensional regression analysis is decomposed into two pieces of one-dimensional regression analysis, so that operation efficiency is greatly improved, and operation complexity is lowered.
Owner:月明星(北京)科技有限公司
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