نتایج جستجو برای: direction frames

تعداد نتایج: 207736  

A. Abdollahi M. Monfaredpour

Finite normalized tight frames are interesting because they provide decompositions in applications and some physical interpretations. In this article, we give a recursive method for constructing them.

‎In this paper‎, ‎by using the sequence of multipliers‎, ‎we introduce frames with algebraic bounds in Hilbert pro-$ C^* $-modules‎. ‎We investigate the relations between frames and $ ast $-frames‎. ‎Some properties of $ ast $-frames in Hilbert pro-$ C^* $-modules are studied‎. ‎Also‎, ‎we show that there exist two differences between $ ast $-frames in Hilbert pro-$ C^* $-modules and Hilbert $ ...

Journal: :journal of linear and topological algebra (jlta) 0
l. gavruta politehnica university of timisoara, department of mathematics, piata victoriei no.2, 300006 timisoara, romania; g zamani eskandani faculty of sciences, department of mathematics, university of tabriz, tabriz, iran. p gavruta politehnica university of timisoara, department of mathematics, piata victoriei no.2, 300006 timisoara, romania;

we give some new results on sparse signal recovery in the presence of noise, forweighted spaces. traditionally, were used dictionaries that have the norm equal to 1, but, forrandom dictionaries this condition is rarely satis ed. moreover, we give better estimationsthen the ones given recently by cai, wang and xu.

Journal: :Journal of Mathematical Analysis and Applications 2008

G. Kavian, M. S. Asgari

In this paper we study the duality of Bessel and g-Bessel sequences in Hilbert spaces. We show that a Bessel sequence is an inner summand of a frame and the sum of any Bessel sequence with Bessel bound less than one with a Parseval frame is a frame. Next we develop this results to the g-frame situation.

Journal: :International journal of applied research in social sciences 2022

This research examined how three national newspapers in Nigeria (Daily Sun, The Guardian, and Vanguard) covered the conflicts that arose during 2021 gubernatorial primaries Anambra State. researchers used agenda-setting theory to analyse news reports determined depth, direction, dominant frames report on crises. study lasted eight months, from April 1st November 30th, 2021, analysed 732 edition...

Journal: :Brain research. Cognitive brain research 2005
E Macaluso J Driver J van Velzen M Eimer

Recent evidence indicates that the spatial direction of endogenous covert spatial attention in one sensory modality can crossmodally influence early processing of stimuli in a different modality. However, spatial locations are initially coded according to different frames of reference for different modalities (e.g., body-centered for touch versus retinocentric vision) and postural changes (e.g....

2015
Benjamin Thomas Crane Doug Wylie

Heading estimation involves both inertial and visual cues. Inertial motion is sensed by the labyrinth, somatic sensation by the body, and optic flow by the retina. Because the eye and head are mobile these stimuli are sensed relative to different reference frames and it remains unclear if a perception occurs in a common reference frame. Recent neurophysiologic evidence has suggested the referen...

Journal: :GeoInformatica 1997
Dimitris Papadias Max J. Egenhofer

In several applications, there is the need to reason about spatial relations using multiple local frames of reference that are organized hierarchically. This paper focuses on hierarchical reasoning about direction relations, a special class of spatial relations that describe order in space (e.g., north or northeast). We assume a spatial database of points and regions. Points belong to regions, ...

2015
Xuehui Wang Jinli Suo Jingyi Yu Yongdong Zhang Qionghai Dai

Coded aperture imaging systems have recently shown great success in recovering scene depth and extending the depth-of-field. The ideal pattern, however, would have to serve two conflicting purposes: 1) be broadband to ensure robust deconvolution and 2) has sufficient zero-crossings for a high depth discrepancy. This paper presents a simple but effective scene-adaptive coded aperture solution to...

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