نتایج جستجو برای: vanishing perturbations

تعداد نتایج: 51900  

2014
Gonzalo E. Reyes

The florentine Tommaso Cassai (1401-c.1427) 1 better known as Masaccio, has been hailed as the first great painter of the Italian Renaissance and his fresco Trinity (c.1425, Santa Maria Novella, Florence) as the first work of Western art that used full perspective. It appears that the author was inspired and actually helped by his friend Filippo Brunelleschi (1377-1446), the celebrated architec...

The theory of local homology modules was initiated by Matlis in 1974. It is a dual version of the theory of local cohomology modules. Mohammadi and Divaani-Aazar (2012) studied the connection between local homology and Gorenstein flat modules by using Gorenstein flat resolutions. In this paper, we introduce generalized local homology modules for complexes and we give several ways for computing ...

A. Tayebi, M. H. Emamian,

In this paper, we study generalized Douglas-Weyl Finsler metrics. We find some conditions under which the class of generalized Douglas-Weyl (&alpha, &beta)-metric with vanishing S-curvature reduce to the class of Berwald metrics.

2001
Virginio Cantoni Luca Lombardi Marco Porta Nicolas Sicard

In this paper we introduce two different representation approaches and propose two techniques to estimate the position of vanishing points in an image, one based on a probabilistic strategy and the other focused on a deterministic analysis. Unlike most of the methods so far developed, which exploit the Gaussian sphere, the new techniques operate in the (ρ, θ) polar parameter space and in the (x...

2011
Santanu Chaudhury Shantanu Ghosh Amrita Basu Brejesh Lall Sumantra Dutta Roy Lopamudra Choudhury R. Prashanth Ashish Singh Amit Maniyar

We present a novel perception-driven approach to low-cost tele-presence systems, to support immersive experience in continuity between projected video and conferencing room. We use geometry and spectral correction to impart for perceptual continuity to the whole scene. The geometric correction comes from a learning-based approach to identifying horizontal and vertical surfaces. Our method redra...

Journal: :IPOL Journal 2017
José Lezama Gregory Randall Rafael Grompone von Gioi

We present a method for the automatic detection of vanishing points in urban scenes based on finding point alignments in a dual space, where converging lines in the image are mapped to aligned points. To compute this mapping the recently introduced PClines transformation is used. A robust point alignment detector is run to detect clusters of aligned points in the dual space. Finally, a post-pro...

2006
Charles R. Doering Edward A. Spiegel Rodney A. Worthing

The rate of viscous energy dissipation in a shear layer of incompressible Newtonian fluid with injection and suction is studied by means of exact solutions, nonlinear and linearized stability theory, and rigorous upper bounds. For large enough values of the injection angle a steady laminar flow is nonlinearly stable for all Reynolds numbers, while for small but nonzero angles the laminar flow i...

2008
Dubravko Horvat

We consider the gravastar model where the vacuum phase transition between the de Sitter interior and the Schwarzschild or Schwarzschild–de Sitter exterior geometries takes place at a single spherical δ-shell. We derive sharp analytic bounds on the surface compactness (2m/r) that follow from the requirement that the dominant energy condition (DEC) holds at the shell. In the case of Schwarzschild...

Journal: :IEEE Trans. Geoscience and Remote Sensing 2003
John D. Bolten Venkat Lakshmi Eni G. Njoku

In the present study, remote sensing of soil moisture is carried out using the Passive and Active Land S-band airborne sensor (PALS). The data in this paper were taken from 5 days of overflights near Chickasha, Oklahoma during the 1999 Southern Great Plains (SGP) experiment. Presently, we analyze the collected data to understand the relationships between the observed signals (radiometer brightn...

2016
Anastasia-Theodora Timoleon Leontios J. Hadjileontiadis

This paper presents all the aspects expected for the MediaEval Workshop. The tested and adopted solutions are well described and the interest of using a set of features versus another one is discussed. The conclusion follows state-ofthe-art findings and allows bringing new inputs in the understanding of emotion prediction.

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