Results 121 to 130 of about 159,936 (305)
, 2020 A quaternion rational surface is a rational surface generated by two rational space curves via quaternion multiplication. In general, the structure of the graded minimal free resolution of a rational surface is unknown.
Hoffman, Jerome William +2 more
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Advanced Engineering Materials, EarlyView.Low‐voltage FIB‐SEM tomography combined with a image preprocessing pipeline improves phase contrast and enables reliable machine‐learning segmentation of conductive networks in lithium‐ion battery electrodes. Structural descriptors are extracted from segmented images, done semimanually and automated, and compared.
Lisa Beran +6 more
wiley +1 more source
The rational cuboid a quartic surface
Rocky Mountain Journal of Mathematics, 1988 Den Lösungen des diophantischen Gleichungssystems (*) \(x^ 2+y^ 2=r^ 2\), \(y^ 2+z^ 2=s^ 2\), \(z^ 2+x^ 2=t^ 2\) entsprechen Quader, deren Kanten und Flächendiagonalen sämtlich ganz sind. Verf. interpretiert (*) als Schnitt von drei Quadriken in einem fünfdimensionalen projektiven Raum und gelangt so neben bereits bekannten zu neuen Parametrisierungen ...
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On the slope of rational fibered surfaces
Osaka Journal of Mathematics, 2020 In the present paper, the authors prove an inequality for the slope of a complex rational surface fibered over the projective line, provided that the genus of the general fibre is sufficiently high with respect to its gonality. More in details, let \(f\colon X\to B\) be a relatively minimal surface fibration of genus \(g\geq 2\) and denote by \(K_f ...
Castañeda-Salazar, Margarita +1 more
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Variational Methods in Surface Parameterization [PDF]
, 2005 A surface parameterization is a function that maps coordinates in a 2-dimensional parameter space to points on a surface. This thesis investigates two kinds of parameterizations for surfaces that are disc-like in shape.
Litke, Nathan Jacob
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Advanced Engineering Materials, EarlyView.Grain boundary triple junctions are an essential ingredient of the microstructure of polycrystalline materials. In this study, a triple junction is observed using atomic‐resolution scanning transmission electron microscopy and characterized. Computer simulations reveal that the junction has a dislocation character that is determined by the joining ...
Tobias Brink +4 more
wiley +1 more source
Birational Morphisms of Rational Surfaces
Journal of Algebra, 1997 The author proves, among other things, this theorem: Let \(X\) be a smooth projective rational surface with an effective anticanonical divisor \(-K_X\) and let \(L\) be an nef and big divisor on \(X\) satisfying either \(-K_X.L>0\), or \(-K_X.L=0\) and \(h^1(X,L)>0\).
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Triangular Bézier sub-surfaces on a triangular Bézier surface
, 2011 This paper considers the problem of computing the Bézier representation for a triangular sub-patch on a triangular Bézier surface. The triangular sub-patch is defined as a composition of the triangular surface and a domain surface that is also a ...
Cai, Yiyu +10 more
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General position of points on a rational ruled surface [PDF]
, 2017 In this note we introduce a definition of general position for distinct points on a rational ruled surface and we discuss some related properties having in mind very ampleness criteria for rank 2 vector ...
Alberto Alzati +3 more
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Jixie chuandong, 2004 By designing rational motion parameter and dimension parameter between spherical surface and taper surface and using the characteristic of self-orientation of circularity of spherical surface, the centerline of two circularities of spherical surface ...
刘楠嶓, 腾瑛瑶, 王伟, 陈兴洲
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