منابع مشابه
Reversible Skew Laurent Polynomial Rings and Deformations of Poisson Automorphisms
A skew Laurent polynomial ring S = R[x;α] is reversible if it has a reversing automorphism, that is, an automorphism θ of period 2 that transposes x and x and restricts to an automorphism γ of R with γ = γ. We study invariants for reversing automorphisms and apply our methods to determine the rings of invariants of reversing automorphisms of the two most familiar examples of simple skew Laurent...
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A variety of three-dimensional geometric structures can be formed by regular triangles that are flexibly connected along their edges. Polyhedra, chains, closed rings, and spatial networks can be built by interlinking building blocks called “corpuscles”, each composed of a small number of triangles. Due to the flexible edges, some of the resulting structures may show collective movements. Open-e...
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A two step method has been devised for the statistical inference of deformation changes. In the first step of this method and based on Procrustes analysis of deformation tensors, the significance of the change in a time or space series of deformation tensors is statistically analyzed. In the second step significant change(s) in deformations are localized. In other words, they are assigned to ce...
متن کاملAn Improved Lubrication Model between Piston Rings and Cylinder Liners with Consideration of Liner Dynamic Deformations
The friction pair of piston rings and cylinder liner is one of the most important friction couplings in an internal combustion engine. It influences engine efficiency and service life. Under the excitation of piston slaps, the dynamic deformation of cylinder liner is close to the surface roughness magnitudes, which can affect the friction and lubrication performance between the piston rings and...
متن کاملTension and Deformations in Elastic Polyhedral Rings Made of Corpuscle Elements
Corpuscles are compact geometric structures formed by regular triangles with edges functioning like hinges. They can be connected to form chains, closed rings, and spatial networks. Some of the compound structures are flexible. Their geometric shape can be varied continuously and movements of a single element lead to collective conformation changes along the corpuscle chain. In many cases, howe...
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ژورنال
عنوان ژورنال: Bulletin of the Australian Mathematical Society
سال: 1989
ISSN: 0004-9727,1755-1633
DOI: 10.1017/s0004972700003282