Odor Sensors
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Registrador portátil de odorantes basado en la modulación de temperatura de un sensor mos comercial
A simple, portable and low-cost system for odor detection was developed using a single MOS commercial sensor and a microcontroller. The temperature modulation technique was implemented applying a DC signal pulse to the sensor heater by a bipolar transistor. Two odorant profiles, ethanol and acetic acid vapors, were obtained and distinguished based on their a
Quím. Nova. Publicado em: 2013
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2. Comparação estatística de performance de métodos de redes neurais para sistema de olfação biológica.
One of the human senses that has several aspects get to be elucidated is the olfactory sense. Therefore, many scientists have been studying this sense in order to better understand how does the information processing happens until the brain recognize it. There were lots of theories regarding olfactory system functioning, in which its authors try to explain h
Publicado em: 2007
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3. Sistema neural hÃbrido para reconhecimento de padrÃes em um nariz artificial / Hybrid neural system forpattern recognition in an artificial nose
This dissertation investigates the use of Hybrid Intelligent Systems in the pattern recognition system of an artificial nose. The work involves five main parts: (1) an evaluation of the odors database by a multivariate statistics technique; (2) a validation of the Time Delay Neural Networks in the odors recognition; (3) an evaluation of the Wavelet Transform
Publicado em: 2004
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4. Efeitos do PrÃ-processamento no reconhecimento de padrÃes de odores: aquisiÃÃo estÃtica e dinÃmica
As redes neurais artificiais vÃm sendo consideradas uma tecnologia consolidada e muito aplicada no reconhecimento de padrÃes. VÃrios modelos tÃm sido propostos e investigados para o reconhecimento de padrÃes, e muitos desses modelos sÃo amplamente aceitos. Dentre esses modelos, estÃo o Multilayer Perceptron - MLP, as redes Booleanas e as Redes de Fun�
Publicado em: 2003
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5. ConstruÃÃo de um nariz artificial usando redes neurais
The animals interact with environment in several ways. The smell around them has an extremely importance in the information transport, essential for survival. Such as for the animals, the smell plays an important rule for human beings. Due to this importance, the study in the human olfactory system is very helpful and started very long time ago. Although it
Publicado em: 2000
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6. “Electronic nose” detects major histocompatibility complex-dependent prerenal and postrenal odor components
Mice prefer to mate with individuals expressing different MHC genes from their own. Volatile components presenting MHC-dependent odor types are present in urine and can be detected by mice, as shown by extensive behavioral studies. Similar odor types are suspected to influence human behavior as well. Although a recent report indicates that MHC expression inf
The National Academy of Sciences.