نتایج جستجو برای: ship detection

تعداد نتایج: 581308  

Journal: :Applied sciences 2023

Synthetic aperture radar (SAR) imagery is a promising data source for ocean activity detection. Ship target detection based on SAR images widely used in maritime trade and the military. image are rare, amount of public small. For applications ship detection, model with low dependence, fast iteration training cost needed. In this paper, balanced positive negative enhancement method was used. Thr...

2002
A. J. Brown

This paper examines the influence of collision scenario random variables on the extent of predicted damage in ship collisions. Struck and striking ship speed, collision angle, striking ship type and striking ship displacement are treated as independent random variables. Other striking ship characteristics are treated as dependent variables derived from the independent variables based on relatio...

Journal: :Journal of immunology 2006
Masaki Kashiwada Giorgio Cattoretti Lisa McKeag Todd Rouse Brian M Showalter Umaima Al-Alem Masaru Niki Pier Paolo Pandolfi Elizabeth H Field Paul B Rothman

The adaptor protein, downstream of tyrosine kinases-1 (Dok-1), and the phosphatase SHIP are both tyrosine phosphorylated in response to T cell stimulation. However, a function for these molecules in T cell development has not been defined. To clarify the role of Dok-1 and SHIP in T cell development in vivo, we compared the T cell phenotype of wild-type, Dok-1 knockout (KO), SHIP KO, and Dok-1/S...

2007
Ang Swee Wen Yahya Samian

Ship hull form module is the main module in ship design. The problem of creating fair ship hull surface is of major importance in Computer Aided Ship Design environment. The fitness of these surfaces is generally considered a subjective notion depending on the judgment of the designers (eg. visually pleasing, devoid of unnecessary bumps or wiggles, satisfying certain continuity requirements). O...

Journal: :PLoS ONE 2008
Lia E. Perez Caroline Desponts Nancy Parquet William G. Kerr

BACKGROUND The SH2-containing-5'inositol phosphatase-1 (SHIP) influences signals downstream of cytokine/chemokine receptors that play a role in megakaryocytopoiesis, including thrombopoietin, stromal-cell-derived-Factor-1/CXCL-12 and interleukin-3. We hypothesize that SHIP might control megakaryocytopoiesis through effects on proliferation of megakaryocyte progenitors (MKP) and megakaryocytes (...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1998
M Huber C D Helgason J E Damen L Liu R K Humphries G Krystal

To clarify the role that the src homology 2-containing inositol phosphatase (SHIP) plays in mast cell degranulation, the gene for SHIP was disrupted by homologous recombination in embryonic stem cells. Bone-marrow-derived mast cells from SHIP+/+, +/-, and -/- F2 littermates were compared. SHIP-/- mast cells were found to be far more prone to degranulation, after the crosslinking of IgE preloade...

Journal: :Journal of Computational Design and Engineering 2021

Abstract To prevent maritime accidents, it is crucial to be aware of the surrounding environment near ships. The images recorded by a camera mounted on ship could used for awareness other ships it. In this study, was performed using three procedures: detection, localization, and tracking. Initially, detection deep learning-based model, YOLO (You Only Look Once) v3, based image. A virtual image ...

Journal: :CoRR 2009
Marimuthu Krishnaveni Suresh Kumar Thakur P. Subashini

A new-fangled method for ship wake detection in synthetic aperture radar (SAR) images is explored here. Most of the detection procedure applies the Radon transform as its properties outfit more than any other transformation for the detection purpose. But still it holds problems when the transform is applied to an image with a high level of noise. Here this paper articulates the combination betw...

2017
Qianru Zhou Stephen McLaughlin Alasdair J. G. Gray Shangbin Wu Cheng-Xiang Wang

Early detection of significant traumatic events, e.g. a terrorist attack or a ship capsizing, is important to ensure that a prompt emergency response can occur. In the modern world telecommunication systems could play a key role in ensuring a successful emergency response by detecting such incidents through significant changes in calls and access to the networks. In this paper a methodology is ...

2009
Dirk Geudtner Guy Séguin

The CSA is conducting a feasibility study on a constellation of low-cost small SAR satellites to ensure C-band data continuity beyond RADARSAT-2. The goal is to provide operationally SAR imagery for key maritime surveillance applications such as ship detection, oil spill monitoring, and sea ice mapping. Other applications focus on disaster management and SAR interferometry (InSAR) coherent chan...

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