Documents disponibles écrits par cet auteur

A new approach in modelling undesirable output in DEA modelstar / S. You in Journal of the operational research society (JORS), Vol. 62 N° 12 (Décembre 2011) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 62 N° 12 (Décembre 2011) . - pp. 2146–2156 Titre : A new approach in modelling undesirable output in DEA modelstar Type de document : texte imprimé Auteurs : S. You, Auteur ; H. Yan, Auteur Année de publication : 2011 Article en page(s) : pp. 2146–2156 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Data  Envelopment  Analysis  Undesirable  output  Efficiency  Ecological  extension  Textile  industry Index. décimale : 001.424 Résumé : With an increasing attention on the environment, one of the major research thrusts in Data Envelopment Analysis (DEA) based performance evaluation is the undesirable output in the conventional DEA model. There is considerable research published on the undesirable aspects of production outputs. However, the economic implications and the suitability of the DEA models for incorporating the undesirable outputs are less carefully investigated and discussed. In this paper, a comparative study is conducted of typical eco-DEA models to illustrate this issue. We propose a ratio model to evaluate the undesirable as well as the desirable outputs simultaneously. We apply the specially developed model to investigate the impact of production pollutants while conducting the efficiency evaluation in the textile industry of China. The results reveal that the production output-oriented efficiency evaluation can be significantly altered once the environmental aspects are factored into the model. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n12/abs/jors20111a.html [article] A new approach in modelling undesirable output in DEA modelstar [texte imprimé] / S. You, Auteur ; H. Yan, Auteur . - 2011 . - pp. 2146–2156. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 62 N° 12 (Décembre 2011) . - pp. 2146–2156 Mots-clés : Data  Envelopment  Analysis  Undesirable  output  Efficiency  Ecological  extension  Textile  industry Index. décimale : 001.424 Résumé : With an increasing attention on the environment, one of the major research thrusts in Data Envelopment Analysis (DEA) based performance evaluation is the undesirable output in the conventional DEA model. There is considerable research published on the undesirable aspects of production outputs. However, the economic implications and the suitability of the DEA models for incorporating the undesirable outputs are less carefully investigated and discussed. In this paper, a comparative study is conducted of typical eco-DEA models to illustrate this issue. We propose a ratio model to evaluate the undesirable as well as the desirable outputs simultaneously. We apply the specially developed model to investigate the impact of production pollutants while conducting the efficiency evaluation in the textile industry of China. The results reveal that the production output-oriented efficiency evaluation can be significantly altered once the environmental aspects are factored into the model. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v62/n12/abs/jors20111a.html

Preparation and formation mechanism of nanocomposites with fluorescent and magnetic properties / H. Yan in Acta materialia, Vol. 58 N° 2 (Janvier 2010) 

Public ISBD [article]  in Acta materialia > Vol. 58 N° 2 (Janvier 2010) . - pp. 726-733 Titre : Preparation and formation mechanism of nanocomposites with fluorescent and magnetic properties Type de document : texte imprimé Auteurs : H. Yan, Auteur ; J.C. Zhang, Auteur ; B.W. Yu, Auteur Article en page(s) : pp. 726-733 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Nanocomposites  Magnetic  properties  Optical  properties  Mechanism Index. décimale : 669 Métallurgie Résumé : Fluorescent magnetic nanocomposites were successfully synthesized using the self-prepared Fe3O4 magnetic liquid and CdTe quantum dots (QDs) as precursors. High-resolution transmission electron microscopy, selected area electron diffraction, energy-dispersive spectroscopy and Fourier transform infrared spectroscopy were used to characterize the size, morphology, structure and composition of the nanocomposites. A fluorescent microscope was used to observe their micro-morphology. Magnetic and optical properties were characterized by a vibrating sample magnetometer and fluorescent spectrophotometer, respectively. The characterized results indicated that the Fe3O4 nanoparticles had been successfully combined with CdTe QDs. The products could exist stably in the aqueous phase, and had better biocompatibility. It was found that the nanocomposites, which had higher magnetization intensity and better fluorescent properties synchronously, were fabricated by the formation of chemical bond with amide structure. Thus this type of nanocomposite could be applied in various science and technology fields in the future. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science?_ob=PublicationURL&_tockey=%23TOC%235556%23 [...] [article] Preparation and formation mechanism of nanocomposites with fluorescent and magnetic properties [texte imprimé] / H. Yan, Auteur ; J.C. Zhang, Auteur ; B.W. Yu, Auteur . - pp. 726-733. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 2 (Janvier 2010) . - pp. 726-733 Mots-clés : Nanocomposites  Magnetic  properties  Optical  properties  Mechanism Index. décimale : 669 Métallurgie Résumé : Fluorescent magnetic nanocomposites were successfully synthesized using the self-prepared Fe3O4 magnetic liquid and CdTe quantum dots (QDs) as precursors. High-resolution transmission electron microscopy, selected area electron diffraction, energy-dispersive spectroscopy and Fourier transform infrared spectroscopy were used to characterize the size, morphology, structure and composition of the nanocomposites. A fluorescent microscope was used to observe their micro-morphology. Magnetic and optical properties were characterized by a vibrating sample magnetometer and fluorescent spectrophotometer, respectively. The characterized results indicated that the Fe3O4 nanoparticles had been successfully combined with CdTe QDs. The products could exist stably in the aqueous phase, and had better biocompatibility. It was found that the nanocomposites, which had higher magnetization intensity and better fluorescent properties synchronously, were fabricated by the formation of chemical bond with amide structure. Thus this type of nanocomposite could be applied in various science and technology fields in the future. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science?_ob=PublicationURL&_tockey=%23TOC%235556%23 [...]