96 results about "Nonlinear deformation" patented technology

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).

The invention discloses an intelligent NC super high pressure true 3D uneven loading and unloading and pressure stabilizing model test system. The system includes a combined rack reaction device, a super high pressure true 3D uneven loading and unloading device, an intelligent hydraulic pressure unloading and pressure stabilizing NC system, a model displacement automatic test system and a high-definition multi-probe peeping system. The super high pressure true 3D uneven loading and unloading device is arranged in the combined rack reaction device for performing super high pressure true 3D uneven loading and unloading on a test model. The intelligent hydraulic pressure unloading and pressure stabilizing NC system is connected with the super high pressure true 3D uneven loading and unloadingdevice through a high pressure oil pipe. Through input commands of the intelligent hydraulic pressure unloading and pressure stabilizing NC system, digital servo control of the super high pressure true 3D uneven loading and unloading device for super high pressure true 3D gradient uneven loading and unloading and pressure stabilization control is realized. The model displacement automatic test system collects displacement of any parts in the model automatically. The high-definition multi-probe peeping system observes a tunnel digging, deforming and destruction processes dynamically in real time. The system has advantages of large and adjustable size of the reaction device, servo control of loading, large loading volume, high loading precision, good pressure stabilizing performance, unevenloading and the like. The scale and the performance are innovative home and abroad and non-continuous deformation and destruction processes of deep tunnel digging in a complex environmental conditions can be simulated and accurate information of multi-physical field evolution such as tunnel surrounding rock displacement, stress, strain and the like of tunnels can be acquired through automatic testing. The system has significant application prospects in simulating nonlinear deformation and destruction mechanisms of deep underground projects including energy, traffic, hydro-power and mine and the like.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.