FTIR spectral imaging enhancement for teacher’s facial expressions recognition in the intelligent learning environment

Liu, Tingting; Chen, Zengzhao; Liu, Hai; Zhang, Wei

doi:10.1016/j.infrared.2018.07.035

Cited by 23 publications

(1 citation statement)

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“…In FTIR spectroscopy, IR radiation is passed through a sample, which is partially absorbed or transmitted. The resulting spectrum represents the absorption and transmission of a sample [52,53]. To evaluate the spectral characteristics of different samples in the atmospheric window, we used an FTIR spectrometer and measured their spectral absorption profile.…”

Section: Ftir Spectroscopy Experimentsmentioning

confidence: 99%

Analysis of Sustainable Materials for Radiative Cooling Potential of Building Surfaces

Family¹,

Mengüç²

2018

Sustainability

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The main goal of this paper is to explore the radiative cooling and solar heating potential of several materials for the built environment, based on their spectrally-selective properties. A material for solar heating, should have high spectral emissivity/absorptivity in the solar radiation band (within the wavelength range of 0.2–2 μm), and low emissivity/absorptivity at longer wavelengths. Radiative cooling applications require high spectral emissivity/absorptivity, within the atmospheric window band (8–13 μm), and a low emissivity/absorptivity in other bands. UV-Vis spectrophotometer and FTIR spectroscopy, are used to measure, the spectral absorption/emission spectra of six different types of materials. To evaluate the radiative cooling potential of the samples, the power of cooling is calculated. Heat transfer through most materials is not just a surface phenomenon, but it also needs a volumetric analysis. Therefore, a coupled radiation and conduction heat transfer analysis is used. Results are discussed for the selection of the best materials, for different applications on building surfaces.

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Section: Ftir Spectroscopy Experimentsmentioning

confidence: 99%