Iceberg Detection
نویسندگان
چکیده
منابع مشابه
Polarimetric analysis of iceberg and sea ice radar backscattering mechanisms for iceberg detection
Multi-polarization synthetic aperture radar (SAR) systems are in particular useful for identification and separation of different scattering mechanisms and their sources in a medium (Oliver & Quegan, 1998, p. 319). The Canadian RADARSAT-2 (RS-2) carries a fullypolarimetric SAR system which measures intensities at VV, HH, HV and VH-polarizations as well as phase differences between the different...
متن کاملComputing Iceberg Queries Eeciently
Many applications compute aggregate functions over an attribute (or set of attributes) to nd aggregate values above some speci ed threshold. We call such queries iceberg queries, because the number of abovethreshold results is often very small (the tip of an iceberg), relative to the large amount of input data (the iceberg). Such iceberg queries are common in many applications, including data w...
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Calving from the floating termini of outlet glaciers and ice shelves is just the beginning of an interesting chain of events that can subsequently have important impacts on human life and property. Immediately after calving, many icebergs capsize (roll over by 90◦) due to the instability of their initial geometry. As icebergs melt and respond to the cumulative effects of ocean swell, they can a...
متن کاملComputing Iceberg Queries Efficiently
Many applications compute aggregate functions over an attribute (or set of attributes) to find aggregate values above some specified threshold. We call such queries iceberg queries, because the number of abovethreshold results is often very small (the tip of an iceberg), relative to the large amount of input data (the iceberg). Such iceberg queries are common in many applications, including dat...
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In artificial intelligence, it is important to handle and analyse inconsistency in knowledge bases. Inconsistent pieces of information suggest questions like “where is the inconsistency?” and “how severe is it?”. Inconsistency measures have been proposed to tackle the latter issue, but the former seems underdeveloped and is the focus of this paper. Minimal inconsistent sets have been the main t...
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ژورنال
عنوان ژورنال: Nature
سال: 1929
ISSN: 0028-0836,1476-4687
DOI: 10.1038/124337d0