394,795 research outputs found
Sociolinguistic Conditioning of Phonetic Category Realisation in Non-Native Speech
The realisation of phonetic categories reflects a complex relationship between individual phonetic parameters and both linguistic and extra-linguistic conditioning of language usage. The present paper investigates the effect of selected socio-linguistic variables, such as the age, the amount of language use and cultural/social distance in English used by Polish immigrants to the U.S. Individual parameters used in the realisation of the category ‘voice’ have been found to vary in their sensitivity to extra-linguistic factors: while the production of target-like values of all parameters is related to the age, it is the closure duration that is most stable in the correspondence to the age and level of language proficiency. The VOT and vowel duration, on the other hand, prove to be more sensitive to the amount of language use and attitudinal factors
Learning Background-Aware Correlation Filters for Visual Tracking
Correlation Filters (CFs) have recently demonstrated excellent performance in
terms of rapidly tracking objects under challenging photometric and geometric
variations. The strength of the approach comes from its ability to efficiently
learn - "on the fly" - how the object is changing over time. A fundamental
drawback to CFs, however, is that the background of the object is not be
modelled over time which can result in suboptimal results. In this paper we
propose a Background-Aware CF that can model how both the foreground and
background of the object varies over time. Our approach, like conventional CFs,
is extremely computationally efficient - and extensive experiments over
multiple tracking benchmarks demonstrate the superior accuracy and real-time
performance of our method compared to the state-of-the-art trackers including
those based on a deep learning paradigm
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