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Статті в журналах з теми "Deformation Field"

Автор: Grafiati

Опубліковано: 11 березня 2023

Оновлено: 25 липня 2025

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1

YAMAGUCHI, MASAHIRO. "GAUGE DEFORMATIONS OF CONFORMAL FIELD THEORIES AND ZAMOLODCHIKOV'S C-FUNCTION." International Journal of Modern Physics A 05, no. 22 (1990): 4279–300. http://dx.doi.org/10.1142/s0217751x90001781.

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We study the deformations of conformal field theories in which the perturbing fields include the Virasoro secondary fields of the form L−1φ. We introduce the notion of gauge deformation which is an analogue of the off-shell gauge transformation in string theory. We also calculate Zamolodchikov's c-function and show that it is invariant under the gauge deformation.

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2

TRINCHERO, R. "SCALAR FIELD ON NON-INTEGER-DIMENSIONAL SPACES." International Journal of Geometric Methods in Modern Physics 09, no. 08 (2012): 1250070. http://dx.doi.org/10.1142/s0219887812500703.

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Deformations of the canonical spectral triples over the n-dimensional torus are considered. These deformations have a discrete dimension spectrum consisting of non-integer values less than n. The differential algebra corresponding to these spectral triples is studied. No junk forms appear for non-vanishing deformation parameter. The action of a scalar field in these spaces is considered, leading to non-trivial extra structure compared to the integer-dimensional cases, which does not involve a loss of covariance. One-loop contributions are computed leading to finite results for non-vanishing de

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3

Fan, Jinyan, Zhibiao Guo, Xiaobing Qiao, Zhigang Tao, Fengnian Wang, and Chunshun Zhang. "Constant Resistance and Yielding Support Technology for Large Deformations of Surrounding Rocks in the Minxian Tunnel." Advances in Civil Engineering 2020 (September 28, 2020): 1–13. http://dx.doi.org/10.1155/2020/8850686.

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During the excavation of the Minxian tunnel, problems of large deformations of surrounding rocks and failure of support structures appeared frequently, which caused serious influences on construction safety and costs of the tunnel. Based on laboratory analysis of mineral composition and field investigations on deformation characteristics of the surrounding rocks, the large deformation mechanism of surrounding rocks of the tunnel was considered as water-absorbing swelling molecules of carbonaceous slate and stress-induced asymmetric structural deformations of the surrounding rocks. The structur

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4

Ligas, Marcin, Marek Banaś, and Anna Szafarczyk. "A method for local approximation of a planar deformation field." Reports on Geodesy and Geoinformatics 108, no. 1 (2019): 1–8. http://dx.doi.org/10.2478/rgg-2019-0007.

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AbstractWe present a method of approximation of a deformation field based on the local affine transformations constructed based on n nearest neighbors with respect to points of adopted grid. The local affine transformations are weighted by means of inverse distance squared between each grid point and observed points (nearest neighbors). This work uses a deformation gradient, although it is possible to use a displacement gradient instead – the two approaches are equivalent. To decompose the deformation gradient into components related to rigid motions (rotations, translations are excluded from

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5

Bushenkova, Natalia A., and Olga A. Kuchay. "SEISMOTECTONIC DEFORMATIONS IN THE PACIFIC AND OKHOTSK LITHOSPHERIC PLATES CONTACT ZONE." Interexpo GEO-Siberia 2, no. 2 (2021): 9–16. http://dx.doi.org/10.33764/2618-981x-2021-2-2-9-16.

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The seismotectonic deformations were determined in the Pacific and Okhotsk (Eurasian) lithospheric plates subduction zone based on 2458 mechanisms of earthquake foci data for 1977-2019. The deformation features of medium in different deep layers are shown. The deformation field uniformity in the depth range of 1-70 km and the deformation field inhomogeneity for the submerged plate deep parts (105-200, 200-400 and 400-700 km) are revealed. One of the deformations field change reasons is the influence of ascending and, especially, descending currents of thermogravitational convection in the uppe

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6

Hallberg, Håkan, and Kevin Hult Blixt. "Evaluation of Nanoscale Deformation Fields from Phase Field Crystal Simulations." Metals 12, no. 10 (2022): 1630. http://dx.doi.org/10.3390/met12101630.

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Different methods for evaluation of displacement and strain fields based on phase field crystal (PFC) simulations are shown. Methods originally devised for molecular dynamics (MD) simulations or analysis of high-resolution microscopy images are adapted to a PFC setting, providing access to displacement and strain fields for systems of discrete atoms, such as in MD, as well as to continuous deformation fields. The latter being achieved by geometrical phase analysis. As part of the study, the application of prescribed non-affine deformations in a 3D structural PFC (XPFC) setting is demonstrated

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7

Barkov, L. A., Marina N. Samodurova, and O. A. Nevraeva. "Kinematic and Dynamic Conditions in Metal Rolling of Porous Materials." Materials Science Forum 989 (May 2020): 705–10. http://dx.doi.org/10.4028/www.scientific.net/msf.989.705.

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Mathematical modeling of plastic deformations in rolling consists in a consequent combination of the general energetic relationship in plasticity and the variation inequality expressed the principle of minimum of entire deformation energy. A real deformation state in a plastic zone beneath rolls and corresponding kinematic and dynamics conditions on the contact surface are considered as a limited one for the consequent approximate deformation states and are found out by the method of approximated approach. Any realization of this method on personal computers requires a rational construction of

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8

IBRAGIMOV, Kudaibergen, Darkhan ARTYKBAEV, Kanat BAIBOLOV, and Kamol NAZAROV. "Field Deformation Stamp Experiments." Trudy Universiteta, no. 3 (2021): 166–71. http://dx.doi.org/10.52209/1609-1825_2021_3_166.

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9

ANCO, STEPHEN C. "GAUGE THEORY DEFORMATIONS AND NOVEL YANG–MILLS CHERN–SIMONS FIELD THEORIES WITH TORSION." International Journal of Geometric Methods in Modern Physics 01, no. 04 (2004): 493–544. http://dx.doi.org/10.1142/s0219887804000265.

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A basic problem of classical field theory, which has attracted growing attention over the past decade, is to find and classify all nonlinear deformations of linear abelian gauge theories. The physical interest in studying deformations is to address uniqueness of known nonlinear interactions of gauge fields and to look systematically for theoretical possibilities for new interactions. Mathematically, the study of deformations aims to understand the rigidity of the nonlinear structure of gauge field theories and to uncover new types of nonlinear geometrical structures. The first part of this pap

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10

Jagoe Brown, Mollie S., Floor Schipper, and Arthemy V. Kiselev. "Kontsevich graphs act on Nambu–Poisson brackets, II. The tetrahedral flow is a coboundary in 4D." Journal of Physics: Conference Series 2912, no. 1 (2024): 012042. https://doi.org/10.1088/1742-6596/2912/1/012042.

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Abstract Kontsevich constructed a map from suitable cocycles in the graph complex to infinitesimal deformations of Poisson bi-vector fields. Under the deformations, the bi-vector fields remain Poisson. We ask, are these deformations trivial, meaning, do they amount to a change of coordinates along a vector field? We examine this question for the tetrahedron, the smallest nontrivial suitable graph cocycle in the Kontsevich graph complex, and for the class of Nambu–Poisson brackets on ℝ d . Within Kontsevich’s graph calculus, we use dimension-specific micro-graphs, in which each vertex represent

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11

Perez-Payan, Sinuhe, M. Sabido, E. Mena, and C. Yee-Romero. "Analysis of Scalar Field Cosmology with Phase Space Deformations." Advances in High Energy Physics 2014 (2014): 1–5. http://dx.doi.org/10.1155/2014/958137.

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Phase space deformations on scalar field cosmology are studied. The deformation is introduced by modifying the symplectic structure of the minisuperspace variables. The effects of the deformation are studied in the “C-frame” and the “NC-frame.” In order to remove the ambiguities of working on different frames, a new principle is introduced. When we impose that both frames should be physically equivalent, we conclude that the only possibility for this model, is to have an effective cosmological constantΛeff≥0. Finally we bound the parameter space forθandβ.

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12

Wan, Qiang, Li Ming Wei, Zhen Kai Zhou, and Yun Fei Li. "Dependence of Damage-Induced Magnetization on the Plastic Deformation for X80 Steel." Applied Mechanics and Materials 330 (June 2013): 106–11. http://dx.doi.org/10.4028/www.scientific.net/amm.330.106.

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Metal magnetic memory (MMM) method is a novel, passive magnetic method for inspecting mechanical degradation of ferromagnetic components. In this paper, the correlation between plastic deformation and the deformation-induced magnetic field was experimentally investigated for the X80 steel. Various tensile plastic deformations are introduced into test pieces with different initial discontinuities. The surface strain distributions and normal natural magnetic fields component are measured after the tensile testings. The results show that the normal natural magnetic fields component are effective

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13

Romero, Cristian, Dan Casas, Maurizio M. Chiaramonte, and Miguel A. Otaduy. "Contact-centric deformation learning." ACM Transactions on Graphics 41, no. 4 (2022): 1–11. http://dx.doi.org/10.1145/3528223.3530182.

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We propose a novel method to machine-learn highly detailed, nonlinear contact deformations for real-time dynamic simulation. We depart from previous deformation-learning strategies, and model contact deformations in a contact-centric manner. This strategy shows excellent generalization with respect to the object's configuration space, and it allows for simple and accurate learning. We complement the contact-centric learning strategy with two additional key ingredients: learning a continuous vector field of contact deformations, instead of a discrete approximation; and sparsifying the mapping b

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14

KRIZ, IGOR. "PERTURBATIVE DEFORMATIONS OF CONFORMAL FIELD THEORIES REVISITED." Reviews in Mathematical Physics 22, no. 02 (2010): 117–92. http://dx.doi.org/10.1142/s0129055x10003916.

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The purpose of this paper is to revisit the theory of perturbative deformations of conformal field theory from a mathematically rigorous, purely worldsheet point of view. We specifically include the case of N = (2,2) conformal field theories. From this point of view, we find certain surprising obstructions, which appear to indicate that contrary to previous findings, not all deformations along marginal fields exist perturbatively. This includes the case of deformation of the Gepner model of the Fermat quintic along certain cc fields. In other cases, including Gepner models of K3-surfaces and t

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15

Morinelli, Vincenzo, and Karl-Henning Rehren. "Spacelike deformations: higher-helicity fields from scalar fields." Letters in Mathematical Physics 110, no. 8 (2020): 2019–38. http://dx.doi.org/10.1007/s11005-020-01294-w.

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Abstract In contrast to Hamiltonian perturbation theory which changes the time evolution, “spacelike deformations” proceed by changing the translations (momentum operators). The free Maxwell theory is only the first member of an infinite family of spacelike deformations of the complex massless Klein–Gordon quantum field into fields of higher helicity. A similar but simpler instance of spacelike deformation allows to increase the mass of scalar fields.

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16

Liu, Yin, Shoue Chen, Xiaobo Tan, and Changyong Cao. "A Finite Element Framework for Magneto-Actuated Large Deformation and Instability of Slender Magneto-Active Elastomers." International Journal of Applied Mechanics 12, no. 01 (2020): 2050013. http://dx.doi.org/10.1142/s1758825120500131.

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In this paper, we present an efficient finite element framework for modeling the finite deformations of slender magneto-active elastomers (MAE) under applied magnetic fields or currents. For the convenience of numerical modeling, magnetic field is defined at fixed spatial coordinates in the background space rather than in the elastic MAEs using material coordinates. The magnetic field will vary with free or localized currents while the spatial distribution of the magnetic field will evolve with the motion or deformation of the MAE materials, which is actuated by the surface or body forces indu

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17

Hendrawan, Rezki, Windi Anarta Draniswari, Fitri Indah Wahyuni, Benjamin Sapiie, and Nurcahyo Indro Basuki. "Metamorphic Complex Deformation in North Bangka Island Based on Macrostructures and Microstructures Evidences." Journal of Geoscience, Engineering, Environment, and Technology 9, no. 2 (2024): 134–39. http://dx.doi.org/10.25299/jgeet.2024.9.2.13379.

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The northern Bangka Island is composed of Pemali metamorphic complex which is indicated by the collision between Indochina and Sibumasu blocks. These features are interesting to observe because the metamorphic rocks could be recorded in some geological structures at different times. The study began by conducting field observation on Pemali Metamorphic Complex as objects. Field observation aims to collect lithological data, structural data, and oriented rock samples. The results of field pitching were processed to determine macrostructures, microstructures, and mineral distribution. The data wa

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18

Fialowski, Alice, Ashis Mandal, and Goutam Mukherjee. "Versal Deformations of Leibniz Algebras." Journal of K-Theory 3, no. 2 (2008): 327–58. http://dx.doi.org/10.1017/is008004027jkt049.

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AbstractIn this work we consider deformations of Leibniz algebras over a field of characteristic zero. The main problem in deformation theory is to describe all non-equivalent deformations of a given object. We give a method to solve this problem completely, namely work out a construction of a versal deformation for a given Leibniz algebra, which induces all non-equivalent deformations and is unique on the infinitesimal level.

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19

Parizot, Oriane, Yves Missenard, Pierre Vergely, et al. "Tectonic Record of Deformation in Intraplate Domains: Case Study of Far-Field Deformation in the Grands Causses Area, France." Geofluids 2020 (July 15, 2020): 1–19. http://dx.doi.org/10.1155/2020/7598137.

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Although tectonic plates are usually considered as rigid blocks, intraplate deformation such as lithospheric buckling or diffuse brittle deformation has been recognized for a long time. However, the origin of these deformations remains puzzling. Indeed, whereas the chronology of deformation at plate boundaries can be constrained by numerous methods (syntectonic sedimentary record, thermochronology, etc.), dating of brittle structures (faults, veins, and joints) in the far-field domains remains challenging, preventing a global interpretation of the system as a whole. In this contribution, we ha

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20

SOCHICHIU, CORNELIU. "ON DEFECT INDUCED GAUGE AND YUKAWA FIELDS IN GRAPHENE." International Journal of Modern Physics B 26, no. 05 (2012): 1250055. http://dx.doi.org/10.1142/s0217979212500555.

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We consider lattice deformations (both continuous and topological) of the hexagonal lattice model describing the electronic wave function of graphene in the tight binding approximation. The deformation involves operators with the range up to next-to-neighbor. In the low energy limit, we find that these deformations give rise to couplings of the electronic Dirac field to an external scalar (Yukawa) and gauge fields. The fields are expressed in terms of original defects. As a by-product we establish that the next-to-nearest order is the minimal range of deformations which produces the complete g

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21

Koifman, K. G. "Reference shape of bodies with enhanced kinematics. Part II. Second gradient and microstructure." Vestnik of Samara University. Natural Science Series 29, no. 4 (2023): 54–76. http://dx.doi.org/10.18287/2541-7525-2023-29-4-54-76.

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The work develops differential-geometric methods for modeling finite incompatible deformations of hyperelastic solids with enhanced kinematics. The response of such bodies, along with the standard kinematic field represented by the deformation gradient, is characterized by additional tensor fields. As such, the paper considers: 1) the second deformation gradient and 2) the tensor field of the second rank, modeling the microstructure of the body. For each of these two cases, compatibility conditions are obtained and their geometric interpretation is proposed. Geometry is synthesized on the mate

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22

Sonntag, Nadja, Birgit Skrotzki, Robert Stegemann, Peter Löwe, and Marc Kreutzbruck. "The Role of Surface Topography on Deformation-Induced Magnetization under Inhomogeneous Elastic-Plastic Deformation." Materials 11, no. 9 (2018): 1518. http://dx.doi.org/10.3390/ma11091518.

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It is widely accepted that the magnetic state of a ferromagnetic material may be irreversibly altered by mechanical loading due to magnetoelastic effects. A novel standardized nondestructive testing (NDT) technique uses weak magnetic stray fields, which are assumed to arise from inhomogeneous deformation, for structural health monitoring (i.e., for detection and assessment of damage). However, the mechanical and microstructural complexity of damage has hitherto only been insufficiently considered. The aim of this study is to discuss the phenomenon of inhomogeneous “self-magnetization” of a pol

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23

Han, Liang, and Yuning Song. "Analysis on Welding Temperature Field and Stress Field of Boring Bar of New Boring Machine." Journal of Physics: Conference Series 2280, no. 1 (2022): 012037. http://dx.doi.org/10.1088/1742-6596/2280/1/012037.

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Abstract Ansys software is used to simulate the welding process of the boring bar of the new cylinder head boring machine. The indirect coupling method is used to analyze the temperature field, then the stress field and deformation. It is found that for the double support structure, the highest temperature occurs at the outer stiffened plate of the small diameter end, and the lowest temperature occurs at both ends of the inner support structure. The deformation of the whole structure mainly comes from the axial deformation, and the maximum deformation occurs at the large diameter end of the ou

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24

Brabec, Martin, Jan Tippner, Václav Sebera, Jaromír Milch, and Peter Rademacher. "Standard and non-standard deformation behaviour of European beech and Norway spruce during compression." Holzforschung 69, no. 9 (2015): 1107–16. http://dx.doi.org/10.1515/hf-2014-0231.

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Abstract The goal of the study is to investigate the non-standard deformation behaviour of wood loaded by compression parallel to the grain. This is represented as a negative increment of strain in the range of plastic deformations when the load continues to increase. The objectives of this study are to point out this problem and to provide its description based on the deformation fields that have been analysed using three approaches: a) full-field optical technique based on digital image correlation (DIC); b) “clip on” extensometer and its virtual analogy, and c) crosshead displacement method

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25

Ismail, Mohd Idris Shah, Yasuhiro Okamoto, and Akira Okada. "Thermo-Mechanical Analysis on Thermal Deformation of Thin Stainless Steel in Laser Micro-Welding." International Journal of Manufacturing, Materials, and Mechanical Engineering 6, no. 2 (2016): 51–66. http://dx.doi.org/10.4018/ijmmme.2016040104.

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In the present study, a three-dimensional finite element model has been developed to simulate the temperature, stress and deformation fields in continuous wave (CW) laser micro-welding of thin stainless steel sheet. The welding deformation was experimentally evaluated using a single-mode fiber laser with a high-speed scanning system. Application of developed thermal model demonstrated that the laser parameters, such as laser power, scanning velocity and spot diameter have a significant effect on temperature field and the weld pool. In the case of welding deformation, numerical simulation was c

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26

Saxena, Shashank, Darius Diogo Barreto, and Ajeet Kumar. "Extension–torsion–inflation coupling in compressible electroelastomeric thin tubes." Mathematics and Mechanics of Solids 25, no. 3 (2019): 644–63. http://dx.doi.org/10.1177/1081286519886901.

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We present an axisymmetric and axially homogeneous variational formulation to obtain coupled extension–torsion–inflation deformation in compressible electroelastomeric tubes in the presence of axial and radial electric fields. We show that such deformations occur under the following two conditions: (1) only the axial electric field is imposed, with the electric poling direction in the tube (if present) lying in the radial plane; and (2) only the radial electric field is imposed within the tube, with the electric poling direction (if present) also along the radial direction. The poling directio

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27

Zou, Jing, Jia Liu, Kup-Sze Choi, and Jing Qin. "Intra-Patient Lung CT Registration through Large Deformation Decomposition and Attention-Guided Refinement." Bioengineering 10, no. 5 (2023): 562. http://dx.doi.org/10.3390/bioengineering10050562.

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Deformable lung CT image registration is an essential task for computer-assisted interventions and other clinical applications, especially when organ motion is involved. While deep-learning-based image registration methods have recently achieved promising results by inferring deformation fields in an end-to-end manner, large and irregular deformations caused by organ motion still pose a significant challenge. In this paper, we present a method for registering lung CT images that is tailored to the specific patient being imaged. To address the challenge of large deformations between the source

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28

Fetisov, V. Р. "Structural aspects of deformation hardening with repeated drawing low carbon wire." Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY), no. 2 (May 31, 2022): 44–49. http://dx.doi.org/10.21122/1683-6065-2022-2-44-49.

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While repeated drawing of low carbon wire, a decrease in the grain size of ferrite reduces the parameters of deformation hardening in the initial field of deformations with parabolic hardening and increases in the field of substructural hardening with large and extra‑large total compressions. The transition from large to super‑large total deformations goes along with the development of dynamic return processes that reduce the rate of deformation hardening. Preliminary thermal softening of cold‑formed wire increases the strength gain during subsequent drawing and can be used to increase the tot

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29

Tang, Gao, Chunyan Bai, Saima Kanwal, Zhening Zhao, and Dawei Zhang. "Simulation Study of Dynamic Rotation and Deformation for Plasmonic Electric Field-Skyrmions." Applied Sciences 14, no. 16 (2024): 7425. http://dx.doi.org/10.3390/app14167425.

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The topological properties of optical skyrmions in confined electromagnetic fields are perfectly presented through spin vectors and electric-field vectors. However, currently, electric-field optical skyrmions in surface plasmon polaritons are mostly presented in the form of a Néel type. Most control strategies involve linear directional movement, and topological manipulation methods are monotonous. We specifically propose a multi-arc symmetric slit array, which generates skyrmions from the surface plasmon polariton (SPP) field under excitation of a linearly polarized Gaussian light-source arra

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30

Huebschmann, Johannes. "The formal Kuranishi parameterization via the universal homological perturbation theory solution of the deformation equation." Georgian Mathematical Journal 25, no. 4 (2018): 529–44. http://dx.doi.org/10.1515/gmj-2018-0054.

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AbstractUsing homological perturbation theory, we develop a formal version of the miniversal deformation associated with a deformation problem controlled by a differential graded Lie algebra over a field of characteristic zero. Our approach includes a formal version of the Kuranishi method in the theory of deformations of complex manifolds.

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31

De Pascalis, Riccardo, Michel Destrade, and Giuseppe Saccomandi. "The stress field in a pulled cork and some subtle points in the semi-inverse method of nonlinear elasticity." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 463, no. 2087 (2007): 2945–59. http://dx.doi.org/10.1098/rspa.2007.0010.

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In an attempt to describe cork-pulling, we model a cork as an incompressible rubber-like material and consider that it is subject to a helical shear deformation superimposed onto a shrink fit and a simple torsion. It turns out that this deformation field provides an insight into the possible appearance of secondary deformation fields for special classes of materials. We also find that these latent deformation fields are woken up by normal stress differences. We present some explicit examples based on the neo-Hookean, the generalized neo-Hookean and the Mooney–Rivlin forms of the strain-energy

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32

Ergintav, S., P. Vernant, O. Tan, et al. "Unexpected far-field deformation of the 2023 Kahramanmaraş earthquakes revealed by space geodesy." Science 386, no. 6719 (2024): 328–35. http://dx.doi.org/10.1126/science.ado4220.

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The spatiotemporal pattern of surface displacements from large earthquakes provides crucial insights about the deformation of Earth’s crust at various scales and the interactions among tectonic plates. However, the lack of extensive and large-scale geodetic networks near such seismic events hinders our thorough understanding of the large-scale crustal deformation resulting from earthquakes. Using Türkiye’s extensive and continuous global navigation satellite system (GNSS) network during the moment magnitude 7.8 and 7.6 Kahramanmaraş earthquakes on 6 February 2023, we show that large earthquake

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33

Lementueva, R. A., Yu L. Rebetsky, N. Ya Bubnova, and A. V. Treusov. "LOCAL CHANGE IN THE STRESS STATE IN ROCK SAMPLES BEFORE DESTRUCTION ACCORDING TO THE LODE–NADAI COEFFICIENT." Bulletin of Kamchatka Regional Association «Educational-Scientific Center». Earth Sciences 4(64) (December 28, 2024): 71–79. https://doi.org/10.31431/1816-5524-2024-4-64-71-79.

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In this paper, the relationship of the Lode–Nadai coefficient, which determines the shape of the stress ellipsoid, with the nature of brittle fracture in sandstone, pyrophyllite and dolomite samples for a rigid loading machine is investigated. The measurement of the inhomogeneous deformation field in the samples and the observation of the internal fracture process were performed using strain gauges and acoustic sensors. It is shown that the formation of the main crack is preceded by the evolution of local deformations in the sample, recorded by the strain gauge method. Special processing of st

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Zheng, Xin, Feng Huang, Sheng Wang, and Wenxuan Xu. "Research on the Mechanism of Loose Deformation in Weak Fracture Zone Tunnel Surrounding Rock and Support Control." Buildings 14, no. 8 (2024): 2506. http://dx.doi.org/10.3390/buildings14082506.

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In the fractured weak fault zone, rock mass exhibits low strength and poor self-stability. The geological conditions are complex, and when tunnels cross through fractured zones, significant deformations and collapses are prone to occur, leading to geological hazards. This paper investigates the in situ stress and deformation patterns of the Dongmachang Tunnel No. 1, proposing support solutions for addressing tunnel deformations through field experiments and numerical simulations. The on-site monitoring results indicate that despite implementing measures such as grouting reinforcement and tempo

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Han, Nana, Xinjian Shan, Yingfeng Zhang, Jiaqing Wang, Han Chen, and Guohong Zhang. "Three-Dimensional Surface Deformation of the 2022 Mw 6.6 Menyuan Earthquake from InSAR and GF-7 Stereo Satellite Images." Remote Sensing 16, no. 12 (2024): 2147. http://dx.doi.org/10.3390/rs16122147.

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Three-dimensional coseismic surface deformation fields are important for quantifying the geometric and kinematic characteristics of earthquake rupture faults. However, traditional geodetic techniques are constrained by intrinsic limitations: Interferometric synthetic aperture radar (InSAR) can only extract far-field deformation fields owing to incoherence; global navigation satellite systems (GNSSs) can only acquire displacement at discrete points. The recently developed optical pixel correlation technique, which is based on high-resolution remote sensing images, can acquire near-field coseism

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Wang, Lei, Yu Sheng Li, and Qing Song Huang. "Numerical Simulation Study on the Stress - Deformation Characteristics of Rock Mass of Luding Power Transmission Project in Sichuan." Applied Mechanics and Materials 368-370 (August 2013): 1688–92. http://dx.doi.org/10.4028/www.scientific.net/amm.368-370.1688.

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In this page, combination of finite element numerical simulation and discrete element numerical simulation is used to study the stress - deformation characteristics of rock mass of power transmission project site,whichclarifies the rock mass stress is mainly controlled by thegravitational field,the form of the potential deformationis dominated by compression deformation,andthere is no possibility of occurrence of the horizontal shear deformation.

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37

Zhang, Cheng, Amagu amagu Clement, Jun-ichi Kodama, et al. "Effect of the Connectivity of Weak Rock Zones on the Mining-Induced Deformation of Rock Slopes in an Open-Pit Mine." Sustainability 16, no. 14 (2024): 5974. http://dx.doi.org/10.3390/su16145974.

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Geological structures significantly influence mining-induced deformations in open-pit mines, with their variations and interactions adding complexity to the excavation process and introducing uncertainties in deformation outcomes. This study utilized numerical simulations to analyze the impact of weak rock zones in a specific open-pit limestone quarry in Japan on mining-induced deformation. The simulation results were both qualitatively and quantitatively validated against field measurements, enhancing the reliability of the findings. Subsequently, four conceptual models were developed based o

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38

Hu, Xin, Yanzhou Ji, Lei Chen, Ricardo A. Lebensohn, Long-Qing Chen, and Xiangyang Cui. "Spectral phase-field model of deformation twinning and plastic deformation." International Journal of Plasticity 143 (August 2021): 103019. http://dx.doi.org/10.1016/j.ijplas.2021.103019.

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Vendnroux, G., N. Schmidt, and W. G. Knauss. "Submicron deformation field measurements: Part 3. Demonstration of deformation determinations." Experimental Mechanics 38, no. 3 (1998): 154–60. http://dx.doi.org/10.1007/bf02325737.

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Anischenko, Galyna, and Denys Lavinskyi. "Non-stationary phenomena in technological systems of electromagnetic processing of materials." Bulletin of the National Technical University «KhPI» Series: Dynamics and Strength of Machines, no. 2 (December 31, 2022): 39–42. http://dx.doi.org/10.20998/2078-9130.2022.2.270863.

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A large number of technical and technological facilities work under the action of electromagnetic fields. In electroconductive bodies have significant largest electromagnetic forces that can cause movement or deformation of structural elements. The creation of effective methods of analysis of the distribution of the electromagnetic field and coupled nonstationary deformation of structural elements is topical at present time. The article contains a mathematical formulation of the problem of nonstationary deformation of structural elements under the action of electromagnetic fields. Coupling of

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41

Xu, Dongtao, Changrong Ge, Ying Li, and Yuejuan Liu. "Fluid-solid-heat coupling deformation analysis of the valve trims in a multistage pressure reducing valve." PLOS ONE 17, no. 1 (2022): e0263076. http://dx.doi.org/10.1371/journal.pone.0263076.

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A multistage pressure reducing valve with specially designed pressure reducing components is presented in this paper. As the deformation of the valve trims under fluid-solid-heat coupling has an important influence on the operation reliability of the valve, a numerical simulation is carried out to analyse the flow field characteristic in the valve and radial deformation of the valve trims using the ANSYS software. And a deformation experiment is designed to validate the deformations of the valve trims at high temperature of 693.15 K. The results indicate that the simulation results agree well

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Sui, Xiaodan, Yuanjie Zheng, Yunlong He, and Weikuan Jia. "Symmetric Deformable Registration via Learning a Pseudomean for MR Brain Images." Journal of Healthcare Engineering 2021 (April 23, 2021): 1–8. http://dx.doi.org/10.1155/2021/5520196.

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Image registration is a fundamental task in medical imaging analysis, which is commonly used during image-guided interventions and data fusion. In this paper, we present a deep learning architecture to symmetrically learn and predict the deformation field between a pair of images in an unsupervised fashion. To achieve this, we design a deep regression network to predict a deformation field that can be used to align the template-subject image pair. Specifically, instead of estimating the single deformation pathway to align the images, herein, we predict two halfway deformations, which can move

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43

Yang, Yong, Li Qiang Tang, Yong Wang, and Chen Feng. "Dynamic Growing Crack Tip Field in Visco-Elastic Compressible Material." Key Engineering Materials 385-387 (July 2008): 101–4. http://dx.doi.org/10.4028/www.scientific.net/kem.385-387.101.

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A mechanical model of the visco-elastic compressible material is established in order to investigate the viscous effect in dynamic growing crack-tip field. The constitutive equations on the visco-elastic compressible material are deducted. Through asymptotic analysis, it is shown that in the stable creep growing stage, the elastic-deformation and the visco-deformation are equally dominant in the near-tip field, as 1 ( 1) n r− − . The asymptotic solutions of separative variable in the crack-tip field are aslo obtained. According to numerical calculation, the curves of stress, stain and displace

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44

Cordero-Grande, Lucilio, Gonzalo Vegas-Sanchez-Ferrero, Pablo Casaseca, and Carlos Alberola-Lopez. "A Markov Random Field Approach for Topology-Preserving Registration: Application to Object-Based Tomographic Image Interpolation." IEEE Transactions on Image Processing 21, no. 4 (2011): 2047–61. https://doi.org/10.5281/zenodo.14793372.

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This paper proposes a topology-preserving multiresolution elastic registration method based on a discrete Markov random field of deformations and a block-matching procedure. The method is applied to the object-based interpolation of tomographic slices. For that purpose, the fidelity of a given deformation to the data is established by a block-matching strategy based on intensity- and gradient-related features, the smoothness of the transformation is favored by an appropriate prior on the field, and the deformation is guaranteed to maintain the topology by imposing some hard constraints on the

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45

Yang, Yong, Guo Hui Wu, and Li Qiang Tang. "Study on Quasi-Static Growing Crack Field in Visco-Elastic Compressible Material." Key Engineering Materials 488-489 (September 2011): 694–97. http://dx.doi.org/10.4028/www.scientific.net/kem.488-489.694.

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Анотація:

A mechanical model of the visco-elastic compressible material is established in order to investigate the viscous effect in quasi-static growing crack-tip field. The constitutive equations on the visco-elastic compressible material are deducted. Through asymptotic analysis, it is shown that in the stable creep growing stage, the elastic-deformation and the visco-deformation are equally dominant in the near-tip field, as r-1/(n-1). The asymptotic solutions of separative variable in the crack-tip field are aslo obtained. According to numerical calculation, the curves of stress, stain and displace

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46

Saveliev, D. V., L. Yu Fetisov, D. V. Chashin, et al. "Method of Measuring Deformations of Magnetoactive Elastomers under the Action of Magnetic Fields." Russian Technological Journal 7, no. 4 (2019): 81–91. http://dx.doi.org/10.32362/2500-316x-2019-7-4-81-91.

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Magnetic deformation is a change in the size and shape of a sample under the action of a uniform external magnetic field. The study of this effect in various materials provides deep understanding of the nature of magnetic and mechanical interactions. Moreover, magnetic deformation is of great interest from an engineering point of view for designing new devices. In magnetoactive elastomers containing magnetic microparticles in the polymer matrix, a giant deformation is detected under the action of an external magnetic field. The generally accepted methods for measuring magnetic deformation in m

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Shao, Xin Yan, Xian Zhang Ling, Wei Zhang, Liang Tang, Li Na Wang, and Min Wang. "Finite Element Analysis on Instantaneous Deformation and Consolidation Deformation of Saturated Soft Clay Foundation." Advanced Materials Research 250-253 (May 2011): 3198–203. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.3198.

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Deformation analysis of foundation is an important research field in geotechnical engineering, especially analysis on instantaneous deformation and consolidation deformation of saturated soft clay foundations. In this paper, a computation model of instantaneous deformation and consolidation deformation was built on the basis of Biot Consolidation Theory and consideration of mechanism of instantaneous deformation and consolidation deformation and consideration of interrelation of both deformations. A method was proposed to determine initial pore water pressure in soil. Nonlinearity of soil defo

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48

Berger, Tobias, and Krzysztof Klosin. "A deformation problem for Galois representations over imaginary quadratic fields." Journal of the Institute of Mathematics of Jussieu 8, no. 4 (2009): 669–92. http://dx.doi.org/10.1017/s1474748009000036.

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AbstractWe prove the modularity of minimally ramified ordinary residually reducible p-adic Galois representations of an imaginary quadratic field F under certain assumptions. We first exhibit conditions under which the residual representation is unique up to isomorphism. Then we prove the existence of deformations arising from cuspforms on GL2(AF) via the Galois representations constructed by Taylor et al. We establish a sufficient condition (in terms of the non-existence of certain field extensions which in many cases can be reduced to a condition on an L-value) for the universal deformation

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49

Fedorov, Georgy, Roohollah Hafizi, Vyacheslav Semenenko, and Vasili Perebeinos. "Metal Contact Induced Unconventional Field Effect in Metallic Carbon Nanotubes." Nanomaterials 13, no. 11 (2023): 1774. http://dx.doi.org/10.3390/nano13111774.

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One-dimensional carbon nanotubes (CNTs) are promising for future nanoelectronics and optoelectronics, and an understanding of electrical contacts is essential for developing these technologies. Although significant efforts have been made in this direction, the quantitative behavior of electrical contacts remains poorly understood. Here, we investigate the effect of metal deformations on the gate voltage dependence of the conductance of metallic armchair and zigzag CNT field effect transistors (FETs). We employ density functional theory calculations of deformed CNTs under metal contacts to demo

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50

Kulyabin, Alexander, and Edvard T. Musaev. "SUSY and Tri-Vector Deformations." Symmetry 14, no. 12 (2022): 2525. http://dx.doi.org/10.3390/sym14122525.

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We analyze conditions for a tri-vector deformation of a supergravity background to preserve some supersymmetry. Working in the formalism of the SL(5) exceptional field theory, we present its supersymmetry transformations and introduce an additional USp(4) transformation to stay in the supergravity frame. This transformation acts on local indices and deforms BPS equations of exceptional field theory. The requirement for the deformation to vanish is the desired condition. The condition is shown to be consistent with previous results on bi-vector deformations.

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