Results 21 to 30 of about 1,713 (291)

Ideal clutters

open access: yesDiscrete Applied Mathematics, 2002
The Operations Research model known as the Set Covering Problem has a wide range of applications. See for example the survey by Ceria, Nobili and Sassano and edited by Dell'Amico, Maffioli and Martello (Annotated Bibliographies in Combinatorial Optimization, Wiley, New York, 1997).
Gérard Cornuéjols, Bertrand Guenin
openaire   +1 more source

Towards path‐based semantic dissimilarity estimation for scene representation using bottleneck analysis

open access: yesIET Computer Vision, 2019
In natural images, it remains challenging to estimate dissimilarities between image elements for scene representation due to gradual variations of illuminations, textures or clutters.
Lijuan Xu   +4 more
doaj   +1 more source

Overview of the Greater Lyon weather radar advances from 90's to 2008 [PDF]

open access: yesAdvances in Geosciences, 2010
The local weather radar of Lyon, part of the Aramis network of Meteo-France, is currently located 40 km from the urban community. The measurement quality of this tool is subjected to constant improvements from Meteo-France.
F. Renard, J. Comby
doaj   +1 more source

Infrared Small Maritime Target Detection Based on Integrated Target Saliency Measure

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
Robust and effective detection of a small target in an infrared maritime image is a key technology of maritime target search and tracking applications. Infrared small target detection is a challenging task due to the factors such as dim small targets and
Ping Yang, Lili Dong, Wenhai Xu
doaj   +1 more source

Suppression of Time-domain Jitter of Impulse Radio Ultra-wide Band Radar

open access: yesLeida xuebao, 2015
For Impulse Radio Ultra-Wide Band (IR-UWB) radar, the time jitter transforms the static clutters to dynamic clutters. Thus, strong residue exists and false alarms form after traditional direct current suppression.
Liang Fu-lai   +4 more
doaj   +1 more source

Sparse Nonuniform Frequency Sampling for Fast SFCW Radar Imaging

open access: yesIEEE Access, 2020
Stepped frequency continuous wave (SFCW) radar achieves wide bandwidth by synthesizing series of monochromatic pulses in a consecutive manner. Uniform frequency sampling is often performed with a constant frequency step, which in turn limits the maximum ...
Weikang Si, Xiaodong Zhuge, Jungang Miao
doaj   +1 more source

Extended blocker, deletion, and contraction maps on antichains

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2003
Families of maps on the lattice of all antichains of a finite bounded poset that extend the blocker, deletion, and contraction maps on clutters are considered. Influence of the parameters of the maps is investigated.
Andrey O. Matveev
doaj   +1 more source

Window-Modulated Compounding Nakagami Parameter Ratio Approach for Assessing Muscle Perfusion with Contrast-Enhanced Ultrasound Imaging

open access: yesSensors, 2020
The assessment of microvascular perfusion is essential for the diagnosis of a specific muscle disease. In comparison with the current available medical modalities, the contrast-enhanced ultrasound imaging is the simplest and fastest means for probing the
Huang-Chen Lin, Shyh-Hau Wang
doaj   +1 more source

Harmonic clutter recognition and suppression for automotive radar sensors

open access: yesInternational Journal of Distributed Sensor Networks, 2017
In this article, we propose a novel harmonic clutter recognition and suppression method to overcome the deterioration of a target- or vehicle-detection performance due to harmonic clutters.
Jae-Eun Lee   +5 more
doaj   +1 more source

Robust Small Target Co-Detection from Airborne Infrared Image Sequences

open access: yesSensors, 2017
In this paper, a novel infrared target co-detection model combining the self-correlation features of backgrounds and the commonality features of targets in the spatio-temporal domain is proposed to detect small targets in a sequence of infrared images ...
Jingli Gao, Chenglin Wen, Meiqin Liu
doaj   +1 more source

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