6 results about "Geometric similarity" patented technology

The application discloses a model experiment house foundation deformation loading method based on ground fissure morphological change, collects information related to the model experiment, calculates the geometric similarity ratio and the kinematic similarity ratio of the model experiment, investigates the ground fissure at the house position in the field, determines the spatial overlapping relationship and the fissure morphological change stage, determines the initial position of the platform support column and the moving loading mode in combination with the fissure morphological change and the spatial overlapping relationship, and calculates the loading time and the loading rate of the model house foundation deformation. The spatial overlapping relationship between the fissure and the house is comprehensively considered, the simulation experiment result precision of the house deformation damage under the ground fissure is higher, the platform support column moving loading mode is scientifically and comprehensively reflected, and a solid foundation is laid for the subsequent development of the house foundation deformation loading experiment.

A general-purpose grasping method and apparatus for retrieval enhancement in the open world can effectively balance semantic and geometric similarity, providing more reliable knowledge support for grasping point migration, thereby achieving high-precision and highly generalized zero-shot robot grasping point prediction. The method includes: (1) constructing a grasping memory bank, which integrates data from three channels; (2) determining whether the target task is a visible task, if so, executing step (3), otherwise executing step (4); (3) retrieving source domain images of the same category as the object to be grasped by category name; (4) further retrieving source domain images that are semantically and geometrically similar to the object to be grasped from the source domain image set retrieved in step (3); (5) based on the source domain images retrieved in step (4), performing the migration of grasping points from the source domain image to the target image using a diffusion model, and completing the grasping point prediction of the target image.

The invention relates to a computer-implemented method for determining a geometric similarity of a search component 20, represented by a search model 22, with a plurality of comparison components, each represented by comparison models, wherein the method comprises the following steps.Providing S10 a trained machine learning model 10, trained in a predefined manner, and a plurality of comparison feature vectors representing features of the comparison models; canonically orienting S11 the search model 22 to generate a canonically oriented search model 24; determining similarity values ​​S12, each representing a similarity of the canonically oriented search model 24 to the comparison models 32, using the trained machine learning model 10 and the plurality of comparison feature vectors; and generating S13 a list 60 of a predefined number of most similar comparison components 30 based on the determined similarity values.

This invention discloses a scaled-down design method for the impact dynamic response of aircraft stiffened plate structures, belonging to the field of aircraft structural / strength testing technology. The method comprises the following steps: defining the load parameters and geometric parameters of the aircraft stiffened plate; calculating the relative stiffness of the stiffened plate; defining the basic geometric similarity ratio of the scaled-down model of the stiffened plate; determining the similarity ratio of the stiffened plate panel thickness; determining the similarity ratio of the width, height, and spacing of the stiffeners; obtaining the geometric dimensions of the scaled-down model of the stiffened plate; acquiring the dynamic response of the scaled-down model of the stiffened plate; and, based on the similarity ratio of the dynamic response, using the scaled-down model of the stiffened plate to predict the dynamic response of the prototype. This invention overcomes the practical difficulty of scaling down test specimens based on geometric similarity for thin-walled structures like aircraft stiffened plates, while simultaneously shortening the testing cycle and scale, and saving costs.

The application discloses a model test method of a tunnel multilayer supporting structure, which comprises the following steps: determining the test nature, geometric similarity ratio, model box size and structure form of the model test; converting the geometric similarity ratio to determine the parameters of surrounding rock grade, anchor rod, spraying layer and secondary lining supporting material; designing the load of a jack, and determining the load application range; manufacturing a rough hole model body of a secondary lining-spraying layer-anchor rock bearing arch working condition; applying anchor rod similar material; applying spraying layer similar material; applying secondary lining similar material; loading in stages until the supporting is damaged; monitoring the stress and strain of surrounding rock and each supporting type, recording the stress data and strain data, obtaining the safety factor of each supporting and calculating the total safety factor. The application studies the supporting effect and bearing capacity of the tunnel multilayer supporting structure, calculates the total safety factor of the tunnel multilayer supporting structure, and promotes the development of a new generation of information technology.

This application discloses a method, equipment, medium, and product for constructing a physical model based on geomechanics, relating to the field of physical model testing. The method includes: determining a first geometric similarity ratio; determining a second geometric similarity ratio; establishing a dominant similarity law based on the first geometric similarity ratio to determine the baseline physical and mechanical parameters of the main material of the physical model; correcting the mechanical strength parameters of key structures based on the first and second geometric similarity ratios; constructing the main body of the physical model based on the baseline physical and mechanical parameters and the dimensions of the physical model, and constructing key structures based on the corrected mechanical strength parameters and actual fabrication dimensions; and integrating the constructed key structures with the main body of the constructed physical model based on the prototype geological body to be tested, obtaining the constructed physical model. This application can reflect macroscopic geological structures and reasonably characterize and control the mechanical effects of key structures within a limited physical model space.