نتایج جستجو برای: interleaved

تعداد نتایج: 8207  

2009
K. Kwon H. H. Wu D. G. Nishimura

Introduction: A 2D concentric rings trajectory is inherently centric-ordered, provides a smooth weighting in k-space, and enables shorter scan times [1]. Due to these properties, it is well-suited for magnetizationprepared imaging. Extensions of this trajectory for 3D imaging include: 3D stack-of-rings [2] and 3D interleaved concentric cylinders [3,4]. 3D stack-of-rings trajectory directly inhe...

1999
Shaoquan Jiang Zongduo Dai Guang Gong

A sequence u over a nite eld Fq is called an (f(x); m)-interleaved sequence 1] if f(x) is a common characteristic polynomial of all its m-decimated sequences. This paper demonstrate how the subjects such as the minimal polynomial, the linear span, the period and the correlation values of an (f(x); m)-interleaved sequence are related to its m-decimated sequences when f(x) is irreducible, and mak...

2007
Valmir C. Barbosa

For k ≥ 1, we consider interleaved k-tuple colorings of the nodes of a graph, that is, assignments of k distinct natural numbers to each node in such a way that nodes that are connected by an edge receive numbers that are strictly alternating between them with respect to the relation <. If it takes at least χint(G) distinct numbers to provide graph G with such a coloring, then the interleaved m...

2015
Ameya Bhide Amin Ojani Atila Alvandpour

Time-interleaved ∆Σ (TIDSM) DACs have the potential for a wideband operation. The performance of a twochannel interleaved ∆Σ DAC is very sensitive to the duty-cycle of the half-rate clock. This paper presents a closed-form expression for the SNDR loss of such DACs due to duty cycle error for modulators with a noise transfer function of (1 − z−1). Adding a low-order FIR filter after the modulato...

2012
Eliana Arango Carlos Andres Ramos-Paja Javier Calvente Roberto Giral Sergio Serna

A novel asymmetrical interleaved dc/dc switching converters family intended for photovoltaic and fuel cell applications is presented in this paper. The main requirements on such applications are small ripples in the generator and load, as well as high voltage conversion ratio. Therefore, interleaved structures and voltage multiplier cells have been asymmetrically combined to generate new conver...

Journal: :Magnetic resonance imaging 2016
Hing-Chiu Chang Nan-Kuei Chen

Diffusion-weighted imaging (DWI) obtained with interleaved echo-planar imaging (EPI) pulse sequence has great potential of characterizing brain tissue properties at high spatial-resolution. However, interleaved EPI based DWI data may be corrupted by various types of aliasing artifacts. First, inconsistencies in k-space data obtained with opposite readout gradient polarities result in Nyquist ar...

2014
Paulo F. Carvalho Robert L. Goldstone

Studying different concepts by frequently alternating between them (i.e., interleaving), improves discriminative contrast between different categories, while studying each concept in separate blocks emphasizes the similarities within each category. Interleaved study has been shown to improve learning of high similarity categories by increasing between-category comparison, while blocked study im...

Journal: :Vision Research 1995
George Mather Hilary Tunley

Three experiments examined direction discrimination in temporally interleaved random dot patterns. The stimulus consisted of two or more uncorrelated random patterns presented in a repeating temporal sequence, so that each pattern appeared only once every n frames, separated by uncorrelated patterns. Each pattern shifted either leftward or rightward at each re-appearance (all patterns shifted i...

Journal: :Memory & cognition 2014
Paulo F Carvalho Robert L Goldstone

Recent research in inductive category learning has demonstrated that interleaved study of category exemplars results in better performance than does studying each category in separate blocks. However, the questions of how the category structure influences this advantage and how simultaneous presentation interacts with the advantage are open issues. In this article, we present three experiments....

2015
S. J. ANNAPURNESWARA RAO

An enhanced soft switching technique for an interleaved boost converter has better performance characteristics when compared to conventional boost converter. As IBC operates under soft switching the main devices do not have any additional voltage & current stress on the auxiliary devices are at low level. Where main switches operates out of phase and share the output current while providing sof...

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