The Experts below are selected from a list of 154071 Experts worldwide ranked by ideXlab platform
Veronique Bellonmaurel - One of the best experts on this subject based on the ideXlab platform.
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epo pls external parameter orthogonalisation of pls application to temperature Independent Measurement of sugar content of intact fruits
Chemometrics and Intelligent Laboratory Systems, 2003Co-Authors: Jeanmichel Roger, Fabien Chauchard, Veronique BellonmaurelAbstract:Abstract Near Infrared (NIR) spectrometry would present a high potential for on-line Measurement if the robustness of multivariate calibration was improved. The lack of robustness notably appears when an external parameter varies—e.g. the product temperature. This paper presents a preprocessing method which aims at removing from the X space the part mostly influenced by the external parameter variations. This method estimates this parasitic subspace by computing a PCA on a small set of spectra measured on the same objects, while the external parameter is varying. An application to the influence of the fruit temperature on the sugar content Measurement of intact apples is presented. Without any preprocessing, the bias in the sugar content prediction was about 8° Brix for a temperature variation of 20 °C. After External Parameter Orthogonalisation (EPO) preprocessing, the bias is not more than 0.3° Brix, for the same temperature range. The parasitic subspace is studied by analysing the b -coefficient of a Partial Least Square Regression (PLS) between the temperature and the influence spectra. Further work will be achieved to apply this method to the case of multiple external parameters and to the calibration transfer issue.
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epo pls external parameter orthogonalisation of pls application to temperature Independent Measurement of sugar content of intact fruits
Chemometrics and Intelligent Laboratory Systems, 2003Co-Authors: Jeanmichel Roger, Fabien Chauchard, Veronique BellonmaurelAbstract:Abstract Near Infrared (NIR) spectrometry would present a high potential for on-line Measurement if the robustness of multivariate calibration was improved. The lack of robustness notably appears when an external parameter varies—e.g. the product temperature. This paper presents a preprocessing method which aims at removing from the X space the part mostly influenced by the external parameter variations. This method estimates this parasitic subspace by computing a PCA on a small set of spectra measured on the same objects, while the external parameter is varying. An application to the influence of the fruit temperature on the sugar content Measurement of intact apples is presented. Without any preprocessing, the bias in the sugar content prediction was about 8° Brix for a temperature variation of 20 °C. After External Parameter Orthogonalisation (EPO) preprocessing, the bias is not more than 0.3° Brix, for the same temperature range. The parasitic subspace is studied by analysing the b -coefficient of a Partial Least Square Regression (PLS) between the temperature and the influence spectra. Further work will be achieved to apply this method to the case of multiple external parameters and to the calibration transfer issue.
B Beltran - One of the best experts on this subject based on the ideXlab platform.
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Independent Measurement of the total active 8b solar neutrino flux using an array of 3he proportional counters at the sudbury neutrino observatory
Physical Review Letters, 2008Co-Authors: B Aharmim, S N Ahmed, J F Amsbaugh, A E Anthony, J C Banar, N Barros, E W Beier, A Bellerive, B BeltranAbstract:The Sudbury Neutrino Observatory (SNO) used an array of He3 proportional counters to measure the rate of neutral-current interactions in heavy water and precisely determined the total active (x) B8 solar neutrino flux. This technique is Independent of previous methods employed by SNO. The total flux is found to be 5.54-0.31+0.33(stat)-0.34+0.36(syst)106cm-2s-1, in agreement with previous Measurements and standard solar models. A global analysis of solar and reactor neutrino results yields m2=7.59-0.21+0.1910-5eV2 and =34.4-1.2+1.3 degrees. The uncertainty on the mixing angle has been reduced from SNO's previous results.
H Benaoum - One of the best experts on this subject based on the ideXlab platform.
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scaling tests of the cross section for deeply virtual compton scattering
Physical Review Letters, 2006Co-Authors: Munoz C Camacho, M Mazouz, A Camsonne, C Ferdi, G Gavalian, E Kuchina, M Amarian, M Beaumel, K Aniol, H BenaoumAbstract:We present the first Measurements of the e[over -->]p-->epgamma cross section in the deeply virtual Compton scattering (DVCS) regime and the valence quark region. The Q(2) dependence (from 1.5 to 2.3 GeV(2)) of the helicity-dependent cross section indicates the twist-2 dominance of DVCS, proving that generalized parton distributions (GPDs) are accessible to experiment at moderate Q(2). The helicity-Independent cross section is also measured at Q(2)=2.3 GeV(2). We present the first model-Independent Measurement of linear combinations of GPDs and GPD integrals up to the twist-3 approximation.
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scaling tests of the cross section for deeply virtual compton scattering
Physical Review Letters, 2006Co-Authors: Munoz C Camacho, M Mazouz, A Camsonne, C Ferdi, G Gavalian, E Kuchina, M Amarian, M Beaumel, K Aniol, H BenaoumAbstract:We present the first Measurements of the e(vector sign)p{yields}ep{gamma} cross section in the deeply virtual Compton scattering (DVCS) regime and the valence quark region. The Q{sup 2} dependence (from 1.5 to 2.3 GeV{sup 2}) of the helicity-dependent cross section indicates the twist-2 dominance of DVCS, proving that generalized parton distributions (GPDs) are accessible to experiment at moderate Q{sup 2}. The helicity-Independent cross section is also measured at Q{sup 2}=2.3 GeV{sup 2}. We present the first model-Independent Measurement of linear combinations of GPDs and GPD integrals up to the twist-3 approximation.
Jeanmichel Roger - One of the best experts on this subject based on the ideXlab platform.
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epo pls external parameter orthogonalisation of pls application to temperature Independent Measurement of sugar content of intact fruits
Chemometrics and Intelligent Laboratory Systems, 2003Co-Authors: Jeanmichel Roger, Fabien Chauchard, Veronique BellonmaurelAbstract:Abstract Near Infrared (NIR) spectrometry would present a high potential for on-line Measurement if the robustness of multivariate calibration was improved. The lack of robustness notably appears when an external parameter varies—e.g. the product temperature. This paper presents a preprocessing method which aims at removing from the X space the part mostly influenced by the external parameter variations. This method estimates this parasitic subspace by computing a PCA on a small set of spectra measured on the same objects, while the external parameter is varying. An application to the influence of the fruit temperature on the sugar content Measurement of intact apples is presented. Without any preprocessing, the bias in the sugar content prediction was about 8° Brix for a temperature variation of 20 °C. After External Parameter Orthogonalisation (EPO) preprocessing, the bias is not more than 0.3° Brix, for the same temperature range. The parasitic subspace is studied by analysing the b -coefficient of a Partial Least Square Regression (PLS) between the temperature and the influence spectra. Further work will be achieved to apply this method to the case of multiple external parameters and to the calibration transfer issue.
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epo pls external parameter orthogonalisation of pls application to temperature Independent Measurement of sugar content of intact fruits
Chemometrics and Intelligent Laboratory Systems, 2003Co-Authors: Jeanmichel Roger, Fabien Chauchard, Veronique BellonmaurelAbstract:Abstract Near Infrared (NIR) spectrometry would present a high potential for on-line Measurement if the robustness of multivariate calibration was improved. The lack of robustness notably appears when an external parameter varies—e.g. the product temperature. This paper presents a preprocessing method which aims at removing from the X space the part mostly influenced by the external parameter variations. This method estimates this parasitic subspace by computing a PCA on a small set of spectra measured on the same objects, while the external parameter is varying. An application to the influence of the fruit temperature on the sugar content Measurement of intact apples is presented. Without any preprocessing, the bias in the sugar content prediction was about 8° Brix for a temperature variation of 20 °C. After External Parameter Orthogonalisation (EPO) preprocessing, the bias is not more than 0.3° Brix, for the same temperature range. The parasitic subspace is studied by analysing the b -coefficient of a Partial Least Square Regression (PLS) between the temperature and the influence spectra. Further work will be achieved to apply this method to the case of multiple external parameters and to the calibration transfer issue.
Qin Wang - One of the best experts on this subject based on the ideXlab platform.
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enhanced Measurement device Independent quantum key distribution in reference frame Independent scenario
Journal of The Optical Society of America B-optical Physics, 2019Co-Authors: Hao Zhang, Chun-mei Zhang, Chunhui Zhang, Guangcan Guo, Qin WangAbstract:The protocol of reference-frame-Independent Measurement-device-Independent quantum key distribution has many advantages compared with other existing quantum key distribution protocols, and thus has many interesting applications in the field of quantum information. In this paper, we propose a scheme on the reference-frame-Independent Measurement-device-Independent quantum key distribution by implementing heralded single-photon sources, where we only need to modulate pump light into two intensities (vacuum and nonvacuum). Through numerical simulations, we demonstrate that our scheme can exhibit much longer transmission distance than the standard three-intensity decoy-state Measurement-device-Independent quantum key distribution under a reference-frame-Independent scenario.
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Practical decoy-state reference-frame-Independent Measurement-device-Independent quantum key distribution
Physical Review A, 2017Co-Authors: Chun-mei Zhang, Jian-rong Zhu, Qin WangAbstract:Reference-frame-Independent Measurement-device-Independent quantum key distribution (RFI-MDI-QKD) is proposed to remove all possible detector side channel attacks without the alignment of reference frames. Due to unavoidable multiphoton events in practical sources, the decoy-state method is always adopted in real-life QKD systems. Unlike original MDI-QKD (O-MDI-QKD), the characterization on practical decoy-state RFI-MDI-QKD is still absent to date. In this paper, we investigate the performance of practical decoy-state RFI-MDI-QKD at different misalignments of reference frames with full parameter optimization when considering statistical fluctuations, and provide a clear comparison between decoy-state RFI-MDI-QKD and O-MDI-QKD. Simulation results demonstrate that decoy-state RFI-MDI-QKD can exhibit performance comparable to that of O-MDI-QKD in practical scenarios, which is very robust in QKD systems.
