Light-transmittance predictions under multiple-light-scattering conditions II Inverse problem: particle size determination

Czerwiński, Marek; Mroczka, Janusz; Girasole, Thiery; Gouesbet, G.; Gréhan, Gèrard

doi:10.1364/ao.40.001525

Cited by 27 publications

(10 citation statements)

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“…The simulation only takes into account the absorption of gases and assumes the absence of multiple scattering in the particle phase. These assumptions can cause additional measurement errors in the absorption coefficients, particularly for water vapour [45,46].…”

Section: Gas Content Determination Based On a Measured Spectrummentioning

confidence: 99%

Influence of temperature on synthetic data-based calibration models for low resolution open-path FTIR spectroscopy

Cięszczyk¹

2014

Bulletin of the Polish Academy of Sciences: Technical Sciences

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Abstract. This article presents the problem of determining the gas concentration under conditions of changing temperatures. The solution to this problem is based on spectral measurements using chemometric models. Such problems arise when measuring gases during various industrial processes, mainly the pyrolysis process. Chemometric models are built using synthetic calibration data. Line-by-line and statistical models were applied for spectra modelling. The effect of temperature on extracting the gas concentration from spectra of various resolutions was determined. Next, the global model was built and tested using calibration data for specific temperature ranges. The properties of the linear and nonlinear partial least-squares (PLS) models that were applied to the considered issues were demonstrated. CO and CH4 were used as example gases.

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Section: Gas Content Determination Based On a Measured Spectrummentioning

confidence: 99%

Influence of temperature on synthetic data-based calibration models for low resolution open-path FTIR spectroscopy

Cięszczyk¹

2014

Bulletin of the Polish Academy of Sciences: Technical Sciences

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“…In many cases, during the analysis of light propagation it is necessary to transmittance predictions [17,18]. The properties of the scattered light collected by detectors are predicted, taking into account e.g.…”

Section: Bistable System Mathematical Modelmentioning

confidence: 99%

Optical switching method based on two diffraction gratings bistable system

Kisała

Cięszczyk

2014

SPIE Proceedings

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This paper presents properties of all-optical bistable fibre switch using two fibre Bragg gratings and rare earth elements doped optical fiber. It is not possible to obtain bistable properties at low switching power level in case of a single fibre grating. In this article the method of optical switching that uses all-optical switch has been proposed. It has been achieved by varying the refractive index of nonlinear optical material as a result of light signal amplitude changes. Presented optical bistable device can be used both in contemporary optically switched networks as well as in optoelectronic sensors, owing to their high achievable resolution.

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“…During the analysis it is assumed that light scattering from particles (e.g., soot) is not present. Light scattering signicantly changes both the transmissivity and emissivity [19,20]. Therefore the presence of particles inuences the radiative emission from ames.…”

Section: Introductionmentioning

confidence: 99%

Non-Luminous Flame Temperature Determination Method Based on CO₂Radiation Intensity

Cięszczyk

2014

Acta Phys. Pol. A

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A new method for estimating the temperature of non-luminous ames is presented. The spectral radiation intensity emitted from uniform or temperature-axisymmetric CO2 gas is simulated. A new inversion scheme that utilizes intensity ratios instead of directly spectral intensities is applied. This technique eliminates the errors caused by inaccuracies in the absolute radiation intensity that result from both calibration and on-site measurement. For example, this situation can occur when a spectrometer acquires radiance within only a part of its eld of view. Neural networks are used as inverse models. The proposed inversion approach shows good results with simulated data. The analysis of example measured emission spectra from practical ames is also demonstrated.

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Light-transmittance predictions under multiple-light-scattering conditions II Inverse problem: particle size determination

Cited by 27 publications

References 1 publication

Influence of temperature on synthetic data-based calibration models for low resolution open-path FTIR spectroscopy

Influence of temperature on synthetic data-based calibration models for low resolution open-path FTIR spectroscopy

Optical switching method based on two diffraction gratings bistable system

Non-Luminous Flame Temperature Determination Method Based on CO₂Radiation Intensity

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Light-transmittance predictions under multiple-light-scattering conditions II Inverse problem: particle size determination

Cited by 27 publications

References 1 publication

Influence of temperature on synthetic data-based calibration models for low resolution open-path FTIR spectroscopy

Influence of temperature on synthetic data-based calibration models for low resolution open-path FTIR spectroscopy

Optical switching method based on two diffraction gratings bistable system

Non-Luminous Flame Temperature Determination Method Based on CO2Radiation Intensity

Contact Info

Product

Resources

About

Non-Luminous Flame Temperature Determination Method Based on CO₂Radiation Intensity