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- W3141742200 abstract "In 1991, J. Labed, et al. offered a formula of passive measurement of directional emissiv-ity of object in laboratory. It is based on two preconditions, background radiation and the temperature of target (T,) different to background temperature (Tb) and the bigger the difference Δ T=Tt-Tb) is , the higher the accuracy of measurement will be. In fact, only approximate black-body exists, as Tt≠Tb, it is more difficult to satisfy the precondition of blackbody background radiation. Authors of this paper re-deduce this formula under the condition of non-blackbody background and a new concept of effective emissivity. Our results had been proven by Monte Carlo's simulation and experiments. We re-explain the experimental results offered by J. Labed et al. and why er, 3.7(θ) reduces more rapidly than er1 10.6(θ) and er1 12(θ) as θincreases." @default.
- W3141742200 created "2021-04-13" @default.
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- W3141742200 date "2000-01-01" @default.
- W3141742200 modified "2023-09-26" @default.
- W3141742200 title "The passive measurements of object's directional emissivity in laboratory" @default.
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