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Results 1 - 10
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14,640
Three-dimensional object recognition from single two-dimensional images
- Artificial Intelligence
, 1987
"... A computer vision system has been implemented that can recognize threedimensional objects from unknown viewpoints in single gray-scale images. Unlike most other approaches, the recognition is accomplished without any attempt to reconstruct depth information bottom-up from the visual input. Instead, ..."
Abstract
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Cited by 484 (7 self)
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, three other mechanisms are used that can bridge the gap between the two-dimensional image and knowledge of three-dimensional objects. First, a process of perceptual organization is used to form groupings and structures in the image that are likely to be invariant over a wide range of viewpoints. Second
Dual polyhedra and mirror symmetry for Calabi–Yau hypersurfaces in toric varieties
- J. Alg. Geom
, 1994
"... We consider families F(∆) consisting of complex (n − 1)-dimensional projective algebraic compactifications of ∆-regular affine hypersurfaces Zf defined by Laurent polynomials f with a fixed n-dimensional Newton polyhedron ∆ in n-dimensional algebraic torus T = (C ∗ ) n. If the family F(∆) defined by ..."
Abstract
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Cited by 467 (20 self)
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by a Newton polyhedron ∆ consists of (n − 1)-dimensional Calabi-Yau varieties then the dual, or polar, polyhedron ∆ ∗ in the dual space defines another family F( ∆ ∗ ) of Calabi-Yau varieties, so that we obtain the remarkable duality between two different families of Calabi-Yau varieties. It is shown
Experimental verification of a negative index of refraction,”
- Science,
, 2001
"... Abstract: We studied a two-dimensional square-lattice photonic crystal with all-angle negative refraction at its first band. Using this photonic crystal, we designed and fabricated a flat lens functioning as a cylindrical lens by increasing the vertical dimension of the photonic crystal. Twodimensi ..."
Abstract
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Cited by 377 (9 self)
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Abstract: We studied a two-dimensional square-lattice photonic crystal with all-angle negative refraction at its first band. Using this photonic crystal, we designed and fabricated a flat lens functioning as a cylindrical lens by increasing the vertical dimension of the photonic crystal
Revised calibration of the geomagnetic polarity timescale for the late Cretaceous and Cenozoic
- Journal of Geophysical Research
, 1995
"... Abstract. Recently reported radioisotopic dates and magnetic anomaly spacings have made it evident hat modification is required for the age calibrations for the geomagnetic polarity timescale of Cande and Kent (1992) at the Cretaceous/Paleogene boundary and in the Pliocene. An adjusted geomagnetic r ..."
Abstract
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Cited by 401 (7 self)
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reversal chronology for the Late Cretaceous and Cenozoic is presented that is consistent with astrochronology in the Pleistocene and Pliocene and with a new timescale for the Mesozoic. The age of 66 Ma for the Cretaceous/Paleogene (K/P) boundary used for calibration in the geomagnetic polarity timescale
Icondensation: Unifying low-level and high-level tracking in a stochastic framework
, 1998
"... . Tracking research has diverged into two camps; low-level approaches which are typically fast and robust but provide little fine-scale information, and high-level approaches which track complex deformations in high-dimensional spaces but must trade off speed against robustness. Real-time high-level ..."
Abstract
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Cited by 316 (13 self)
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. Tracking research has diverged into two camps; low-level approaches which are typically fast and robust but provide little fine-scale information, and high-level approaches which track complex deformations in high-dimensional spaces but must trade off speed against robustness. Real-time high
Optical and confinement properties of two-dimensional photonic crystals
- J. Lightw.Technol
, 1999
"... Abstract—We describe experiments on a quasi-two-dimensional (2-D) optical system consisting of a triangular array of air cylinders etched through a laser-like Ga(Al)As waveguiding het-erostructure. Such a configuration is shown to yield results very well approximated by the infinite 2-D photonic cry ..."
Abstract
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Cited by 14 (2 self)
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photoluminescence of embedded quantum wells or InAs quantum dots to generate an internal probe beam. Out-of-plane scattering losses are evaluated by various means. In a second part, in-plane micrometer-sized pho-tonic boxes bounded by circular trenches or by two-dimensional photonic crystal are probed by exciting
Band structure of absorptive two-dimensional photonic crystals
"... The band structure for an absorptive two-dimensional photonic crystal made from cylinders consisting of a Drude material is calculated. Absorption causes the spectrum to become complex and form islands in the negative complex half-plane. The boundaries of these islands are not always formed by the ..."
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The band structure for an absorptive two-dimensional photonic crystal made from cylinders consisting of a Drude material is calculated. Absorption causes the spectrum to become complex and form islands in the negative complex half-plane. The boundaries of these islands are not always formed
Two-dimensional crystallization of Ca-ATPase by detergent removal
- Biophysical Journal
, 1998
"... ABSTRACT By using Bio-Beads as a detergent-removing agent, it has been possible to produce detergent-depleted two-dimensional crystals of purified Ca-ATPase. The crystallinity and morphology of these different crystals were analyzed by electron microscopy under different experimental conditions. A l ..."
Abstract
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Cited by 2 (0 self)
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ABSTRACT By using Bio-Beads as a detergent-removing agent, it has been possible to produce detergent-depleted two-dimensional crystals of purified Ca-ATPase. The crystallinity and morphology of these different crystals were analyzed by electron microscopy under different experimental conditions. A
The group Lasso for logistic regression
- Journal of the Royal Statistical Society, Series B
, 2008
"... Summary. The group lasso is an extension of the lasso to do variable selection on (predefined) groups of variables in linear regression models. The estimates have the attractive property of being invariant under groupwise orthogonal reparameterizations. We extend the group lasso to logistic regressi ..."
Abstract
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Cited by 276 (11 self)
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consistent even if the number of predictors is much larger than sample size but with sparse true underlying structure. We further use a two-stage procedure which aims for sparser models than the group lasso, leading to improved prediction performance for some cases. Moreover, owing to the two-stage nature
Functionalized Graphene Supported Platinum with Highly Catalytic Activity for Proton Exchange Membrane Fuel Cell
"... Graphene, a two-dimensional crystal, consisted of monolayers of carbon atoms arranged in a honeycombed network with six-membered rings [1] has attracted tremendous attentions for interdisciplinary fields, e.g., clean energy-related devices [2], polymer nanocomposite [3], electronic devices [4], due ..."
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Graphene, a two-dimensional crystal, consisted of monolayers of carbon atoms arranged in a honeycombed network with six-membered rings [1] has attracted tremendous attentions for interdisciplinary fields, e.g., clean energy-related devices [2], polymer nanocomposite [3], electronic devices [4], due
Results 1 - 10
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14,640
