Definitions
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Etymologies
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Examples
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Like a sniffer dog, an eNose first needs to be trained with odor samples so as to build a database of reference.
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As an odor passes through the eNose, its molecular features stimulate the sensors in such a way as to produce a unique electrical pattern - an 'odor fingerprint' - that characterizes that specific odor.
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Rather than train an eNose to recognize a particular odor, they trained it to estimate the odor along a particular perceptual axis.
PhysOrg.com - latest science and technology news stories 2010
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Rather than train an eNose to recognize a particular odor, they trained it to estimate the odor along a particular perceptual axis.
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The scientists found that the eNose was able to generalize and rate the pleasantness of novel odors it never smelled before, and these ratings were about 80% similar to those of naive human raters who had not participated in the eNose training phase.
PhysOrg.com - latest science and technology news stories 2010
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From this dataset, they developed an 'odor pleasantness' algorithm, which they then programmed into the eNose.
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The scientists found that the eNose was able to generalize and rate the pleasantness of novel odors it never smelled before, and these ratings were about 80% similar to those of naive human raters who had not participated in the eNose training phase.
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The scientists then got the eNose to predict the pleasantness of a completely new set of odors not contained in their database against the ratings provided by a completely different group of native Israelis.
PhysOrg.com - latest science and technology news stories 2010
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The scientists then got the eNose to predict the pleasantness of a completely new set of odors not contained in their database against the ratings provided by a completely different group of native Israelis.
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In other words, they trained their eNose to predict whether an odor would be perceived as pleasant or unpleasant, or anywhere in between.
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