Bibliografías temáticas / Plans isoclins

Literatura académica sobre el tema "Plans isoclins"

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Publicado: 18 de mayo de 2024

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Artículos de revistas sobre el tema "Plans isoclins"

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Et-Taoui, Boumediene. "Quaternionic equiangular lines". Advances in Geometry 20, n.º 2 (28 de abril de 2020): 273–84. http://dx.doi.org/10.1515/advgeom-2019-0021.

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AbstractLet 𝔽 = ℝ, ℂ or ℍ. A p-set of equi-isoclinic n-planes with parameter λ in 𝔽r is a set of pn-planes spanning 𝔽r each pair of which has the same non-zero angle arccos $\begin{array}{} \sqrt{\lambda} \end{array}$. It is known that via a complex matrix representation, a pair of isoclinic n-planes in ℍr with angle arccos $\begin{array}{} \sqrt{\lambda} \end{array}$ yields a pair of isoclinic 2n-planes in ℂ2r with angle arccos $\begin{array}{} \sqrt{\lambda} \end{array}$. In this article we characterize all the p-tuples of equi-isoclinic planes in ℂ2r which come via our complex representation from p-tuples of equiangular lines in ℍr. We then construct all the p-tuples of equi-isoclinic planes in ℂ4 and derive all the p-tuples of equiangular lines in ℍ2. Among other things it turns out that the quadruples of equiangular lines in ℍ2 are all regular, i.e. their symmetry groups are isomorphic to the symmetric group S4.
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2

Yang, Jian Hui, Rong Ling Sun, Zheng Hao Yang, Xin Yang Lin y Hai Cheng Niu. "Constitutive Relations of Concrete under Plane Stresses Based on Generalized Octahedral Theory". Applied Mechanics and Materials 71-78 (julio de 2011): 342–52. http://dx.doi.org/10.4028/www.scientific.net/amm.71-78.342.

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Continuous (or generalized) octahedral element bodies can be obtained by intercepting a cube with three groups of failure (or yield) planes successively under true triaxial stress state, on which the stresses are twin stresses. Among the resulting polyhedral characteristic element bodies, isoclinal octahedron and orthogonal octahedron are of particular importance. Strength models of continuous octahedrons are then derived by stress analysis to arbitrary inclined sections in three dimensional stress space, and strain models by the principle of strain analysis, so the plane constitutive relations of concrete can be understood by plane problems transformed by stress-strain space according to the symmetry of an orthogonal octahedral octahedron where an arbitrary oblique plane is parallel to one of three rectangular coordinate axes.
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3

Et-Taoui, B. "Equi-isoclinic planes of Euclidean spaces". Indagationes Mathematicae 17, n.º 2 (junio de 2006): 205–19. http://dx.doi.org/10.1016/s0019-3577(06)80016-9.

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Pinit, Pichet, Tobita Susumu y Eisaku Umezaki. "Determination of Principal-Stress Directions by Three-Step Color Phase Shifting Technique". Key Engineering Materials 321-323 (octubre de 2006): 1284–87. http://dx.doi.org/10.4028/www.scientific.net/kem.321-323.1284.

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A three-step phase shifting approach for automatic determination of the isoclinic parameter in photoelasticity is presented. Unreliable isoclinic values affected by the isochromatic parameter are solved using the white light. The method uses three fringe images digitally captured by a digital camera for three different configurations of the dark-field plane polariscope. For a circular disk under compression, results show the method permits the isoclinic parameter in the range -π/2 to π/2 with almost free of the isochromatic parameter and comparable with theory.
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5

Aghajani, A. y A. Moradifam. "Intersection with the vertical isocline in the Liénard plane". Nonlinear Analysis: Theory, Methods & Applications 68, n.º 11 (junio de 2008): 3475–84. http://dx.doi.org/10.1016/j.na.2007.03.040.

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6

SRIVASTAVA, DEEPAK C. "Geometrical similarity in successively developed folds and sheath folds in the basement rocks of the northwestern Indian Shield". Geological Magazine 148, n.º 1 (20 de agosto de 2010): 171–82. http://dx.doi.org/10.1017/s0016756810000610.

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AbstractAn intensely deformed gneiss–migmatite terrane and a relatively undeformed granulite–granitoid terrane constitute the bulk of Precambrian basement in the northwestern Indian Shield. This article traces the structural evolution in the gneiss–migmatite terrane, where traditional methods of structural analysis are difficult to apply, and shows how successively developed folds can assume identical geometry and orientation at an advanced stage of progressive ductile shearing. The gneiss–migmatite terrane exemplifies a regional-scale ductile shear zone that preserves the history of polyphase folding and sheath folding. Geometrical similarity between individual/domain-scale sheath folds and mesoscopic/regional-scale folds implies that sheath folding is common at all scales in the gneiss–migmatite terrane. As the mylonite foliation that traces successive folds is curviplanar, the successively initiated hinge lines were curvilinear from their inception in the shear zone. At the advanced stage of ductile shearing, the hinge line curvatures were accentuated due to their rotation towards subvertically directed maximum stretching (X), and variably oriented fold axial planes were brought into approximate parallelism with the upright principal plane (XY) of the bulk strain ellipsoid. Eventually all the folds, irrespective of their relative order of development, became strongly non-cylindrical, extremely tight, isoclinal and approximately co-planar with respect to each other. It is due to the above geometrical modifications during ductile shearing that folds, irrespective of their order of development, now appear identical with respect to isoclinal geometry, axial plane orientation and hinge line curvilinearity. Evidence from the fold orientations, the deformed lineation patterns and the sheath fold geometry suggest that the shearing occurred in a general shear type of bulk strain, and NNW–SSE-directed subhorizontal compression resulted in subvertically directed stretching in the gneiss–migmatite terrane.
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7

Aghajani, Asadollah, Mohsen Mirafzal y Donald O’Regan. "Conditions for approaching the origin without intersecting the x-axis in the Liénard plane". Filomat 31, n.º 12 (2017): 3761–70. http://dx.doi.org/10.2298/fil1712761a.

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We consider the Li?nard system in the plane and present general assumptions to obtain some new explicit conditions under which this system has or fails to have a positive orbit which starts at a point on the vertical isocline and approaches the origin without intersecting the x-axis. This arises naturally in the existence of homoclinic orbits and oscillatory solutions. Our investigation is based on the notion of orthogonal trajectories of orbits of the system.
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8

Hara, Tadayuki y Jitsuro Sugie. "When all trajectories in the Li�nard plane cross the vertical isocline?" Nonlinear Differential Equations and Applications NoDEA 2, n.º 4 (diciembre de 1995): 527–51. http://dx.doi.org/10.1007/bf01210622.

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9

Blokhuis, Aart, Ulrich Brehm y Boumediene Et-Taoui. "Complex conference matrices and equi-isoclinic planes in Euclidean spaces". Beiträge zur Algebra und Geometrie / Contributions to Algebra and Geometry 59, n.º 3 (19 de diciembre de 2017): 491–500. http://dx.doi.org/10.1007/s13366-017-0374-2.

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10

Aghajani, Asadollah y Amir Moradifam. "Some sufficient conditions for the intersection with the vertical isocline in the Liénard plane". Applied Mathematics Letters 19, n.º 5 (mayo de 2006): 491–97. http://dx.doi.org/10.1016/j.aml.2005.07.005.

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Tesis sobre el tema "Plans isoclins"

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Lehbab, Imène. "Problèmes métriques dans les espaces de Grassmann". Electronic Thesis or Diss., Mulhouse, 2023. http://www.theses.fr/2023MULH6508.

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Il s'agit d'une contribution dans le domaine de la géométrie métrique du plan projectif complexe CP2 et de la variété de Grassmann réelle des plans dans R6. On s'intéresse à l'étude de tous les p-uplets, p ≥ 3, de droites équiangulaires dans C3 et des p-uplets de plans équi-isoclins dans R6. Sachant que 9 est le nombre maximum de droites équiangulaires que l'on peut construire dans C3, on décrit une méthode qui permet de construire tous les p-uplets de droites équiangulaires pour tout pϵ[3,9]. En particulier, on construit dans C3 cinq classes de congruence de quadruplets de droites équiangulaires dont une dépend d'un paramètre réel ɣ que l'on étend à une famille infinie de sextuplets de droites équiangulaires dépendant du même paramètre réel ɣ. En outre, on donne les angles pour lesquels nos sextuplets s'étendent au-delà et jusqu'aux 9-uplets. On sait qu'il existe un p-uplet, p≥3, de plans équi-isoclins engendrant Rr, r≥4, de paramètre c, 0
This work contributes to the field of metric geometry of the complex projective plane CP2 and the real Grassmannian manifold of the planes in R6. More specifically, we study all p-tuples, p ≥ 3, of equiangular lines in C3 or equidistant points in CP2, and p-tuples of equi-isoclinic planes in R6. Knowing that 9 is the maximum number of equiangular lines that can be constructed in C3, we develop a method to obtain all p-tuples of equiangular lines for all p ϵ [3,9]. In particular, we construct in C3 five congruence classes of quadruples of equiangular lines, one of which depends on a real parameter ɣ, which we extend to an infinite family of sextuples of equiangular lines depending on the same real parameter ɣ. In addition, we give the angles for which our sextuples extend beyond and up to 9-tuples. We know that there exists a p-tuple, p ≥ 3, of equi-isoclinic planes generating Rr, r ≥ 4, with parameter c, 0< c <1, if and only if there exists a square symmetric matrix, called Seidel matrix, of p × p square blocks of order 2, whose diagonal blocks are all zero and the others are orthogonal matrices in O(2) and whose smallest eigenvalue is equal to - 1/c and has multiplicity 2p-r. In this thesis, we investigate the case r=6 and we also show that we can explicitly determine the spectrum of all Seidel matrices of order 2p, p ≥ 3 whose off-diagonal blocks are in {R0, S0} where R0 and S0 are respectively the zero-angle rotation and the zero-angle symmetry. We thus show an unexpected link between some p-tuples of equi-isoclinic planes in Rr and simple graphs of order p
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Capítulos de libros sobre el tema "Plans isoclins"

1

"The Isocline Approach to Resource Competition". En Plant Strategies and the Dynamics and Structure of Plant Communities. (MPB-26), Volume 26, 18–51. Princeton University Press, 2020. http://dx.doi.org/10.2307/j.ctvx5w9ws.5.

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2

"2. The Isocline Approach to Resource Competition". En Plant Strategies and the Dynamics and Structure of Plant Communities. (MPB-26), Volume 26, 18–51. Princeton University Press, 1988. http://dx.doi.org/10.1515/9780691209593-003.

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Actas de conferencias sobre el tema "Plans isoclins"

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Stjepan Bogdan. "Fuzzy Controller Design Based on the Phase Plane Isoclines". En 2006 14th Mediterranean Conference on Control and Automation. IEEE, 2006. http://dx.doi.org/10.1109/med.2006.235699.

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Bogdan, Stjepan y Zdenko Kovacic. "Fuzzy Controller Design Based on the Phase Plane Isoclines". En 2006 14th Mediterranean Conference on Control and Automation. IEEE, 2006. http://dx.doi.org/10.1109/med.2006.328846.

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3

Noufal, Abdelwahab, Safeya Alkatheeri, Khalid Obaid, Abdulla Shehab, Hamda Al Shehhi y Saleh Al Hadarem. "Abu Dhabi Tectonic Evolution: Novel Model Impacting Hydrocarbon Potentiality and Trapping Mechanism". En ADIPEC. SPE, 2023. http://dx.doi.org/10.2118/216263-ms.

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Abstract There is evidence that the Oman Mountains deformation is being continued by massive thrust fault systems in the Eastern Abu Dhabi basins. These are large-scale thrust faults with a strike-slip component that most likely include a fault damage zone encircling the fault core, a zone of strong rock shearing, and complicated zones of deformation involving numerous fault planes. The initial event was caused by the compressional movement of the Masirah, which faulted and folded again during the Semail tectonic events. Large faults are typically modeled on seismic as a single, large slip plane, but the outcrop analogs demonstrate the case is far more intricate, according to understanding of fault zone complexity and fault rock attributes from field observations. To understand the strength characteristics and seismic behavior of faults in the subsurface, more in-depth information of the growth and structural style of thrust systems on outcrop analogues is essential considering the future exploration in eastern Abu Dhabi. Architecture, geometry, and tectonic uplift resulting from accumulated slip on the faults are all expressed at the surface for sub-surface thrust faults. The three-dimensional geometry of these fault planes and slip distributions, which provide suggestions to fault evolution and structural styles of the thrust systems in the subsurface, can be better understood by characterizing the structural patterns along-strike morphology of such styles. The fold-thrust belt can be further divided into sub-belts, including the imbricate thrust sub-belt, which is characterized by imbricate stepped-thrust sheets, the thrust-fold sub-belt, which is composed of equally developed thrusts and related folds, and the detachmentfold sub-belt, which is composed of box, chevron, and closed overturned-isoclinal folds on the oblique surface. Imbricate thrust system, passive-roof duplex (triangle zone), fault-related folds, back-thrust system, pop-up structure, and other types of structures have all been identified or inferred. A reasonable model for folding evolution in Abu Dhabi subsurface is presented answering the questions of the many interpretations for folding patterns, such as: If these folds related to the compressional forces, then why they did not represent series of anticlines and synclines? Why have they dissected? Why showing different amplitudes from the deflection to the hinge zones? And finally, why the main geometry is open folding style and did not showing steep dipping limbs towards the direction of the compression more than the other limb? This paper is presenting a trial to answer these questions lightening the tectonic evolution of Abu Dhabi basins reflecting the fields formation and evolution. Thrusting deformation developed preferentially along the main detachment layers, moving upward from the Upper Jurassic through the Cretaceous to Tertiary. The approach presented a new model for Abu Dhabi tectonic evolution, which will impact understanding of the hydrocarbon potentiality and trapping mechanism.
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