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Morphological dilation image coding with context weights prediction / Jiaji Wu in Signal processing. Image communication, Vol. 25 N° 10 (Novembre 2010) 

Public ISBD [article]  in Signal processing. Image communication > Vol. 25 N° 10 (Novembre 2010) . - pp. 717–728 Titre : Morphological dilation image coding with context weights prediction Type de document : texte imprimé Auteurs : Jiaji Wu, Auteur ; Anand Paul, Auteur ; Yan Xing, Auteur Année de publication : 2012 Article en page(s) : pp. 717–728 Note générale : Electronique Langues : Anglais (eng) Mots-clés : Quad-tree  coding  Morphological  dilation  Variable-length  group  test  coding  Weights  training Résumé : This paper proposes an adaptive morphological dilation image coding with context weights prediction. The new dilation method is not to use fixed models, but to decide whether a coefficient needs to be dilated or not according to the coefficient’s predicted significance degree. It includes two key dilation technologies: (1) controlling dilation process with context weights to reduce the output of insignificant coefficients and (2) using variable-length group test coding with context weights to adjust the coding order and cost as few bits as possible to present the events with large probability. Moreover, we also propose a novel context weight strategy to predict a coefficient’s significance degree more accurately, which can be used for two dilation technologies. Experimental results show that our proposed method outperforms the state of the art image coding algorithms available today. ISSN : 0923-5965 En ligne : http://www.sciencedirect.com/science/article/pii/S0923596510001104 [article] Morphological dilation image coding with context weights prediction [texte imprimé] / Jiaji Wu, Auteur ; Anand Paul, Auteur ; Yan Xing, Auteur . - 2012 . - pp. 717–728. Electronique Langues : Anglais (eng) in Signal processing. Image communication > Vol. 25 N° 10 (Novembre 2010) . - pp. 717–728 Mots-clés : Quad-tree  coding  Morphological  dilation  Variable-length  group  test  coding  Weights  training Résumé : This paper proposes an adaptive morphological dilation image coding with context weights prediction. The new dilation method is not to use fixed models, but to decide whether a coefficient needs to be dilated or not according to the coefficient’s predicted significance degree. It includes two key dilation technologies: (1) controlling dilation process with context weights to reduce the output of insignificant coefficients and (2) using variable-length group test coding with context weights to adjust the coding order and cost as few bits as possible to present the events with large probability. Moreover, we also propose a novel context weight strategy to predict a coefficient’s significance degree more accurately, which can be used for two dilation technologies. Experimental results show that our proposed method outperforms the state of the art image coding algorithms available today. ISSN : 0923-5965 En ligne : http://www.sciencedirect.com/science/article/pii/S0923596510001104

Thermal cracking of JP-10 under pressure / Yan Xing ; Fang, Wenjun ; Wenjie Xie in Industrial & engineering chemistry research, Vol. 47 n°24 (Décembre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 n°24 (Décembre 2008) . - p. 10034–10040 Titre : Thermal cracking of JP-10 under pressure Type de document : texte imprimé Auteurs : Yan Xing, Auteur ; Fang, Wenjun, Auteur ; Wenjie Xie, Auteur Année de publication : 2009 Article en page(s) : p. 10034–10040 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Thermal  Cracking Résumé : Thermal cracking of a high density hydrocarbon fuel, JP-10 (exo-tetrahydrodicyclopentadiene), was studied on a batch reactor under different pressures. The effluent was cooled and collected at room temperature and atmospheric pressure. The gaseous and liquid components were quantitatively determined by gas chromatography and gas chromatography−mass spectrometry, respectively. The conversion of JP-10 has relatively low value at atmospheric pressure and increases under pressure. With an increase of the pressure, the relative content of ethene or propene decreases and that of methane, ethane, or propane increases simultaneously. In the liquid products, cyclopentane, cyclopentene, 1,3-cyclopentadiene, and cis-bicyclo[3.3.0]oct-2-ene are found to be major components. Substituted cyclopentene, benzene, toluene, and naphthalene are also observed under high pressures and temperatures. A probable mechanism of the thermal cracking of JP-10 is proposed to explain the product distribution. The process of isomerization might be dominating for liquid product formation during the thermal cracking under elevated pressure. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801128f [article] Thermal cracking of JP-10 under pressure [texte imprimé] / Yan Xing, Auteur ; Fang, Wenjun, Auteur ; Wenjie Xie, Auteur . - 2009 . - p. 10034–10040. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°24 (Décembre 2008) . - p. 10034–10040 Mots-clés : Thermal  Cracking Résumé : Thermal cracking of a high density hydrocarbon fuel, JP-10 (exo-tetrahydrodicyclopentadiene), was studied on a batch reactor under different pressures. The effluent was cooled and collected at room temperature and atmospheric pressure. The gaseous and liquid components were quantitatively determined by gas chromatography and gas chromatography−mass spectrometry, respectively. The conversion of JP-10 has relatively low value at atmospheric pressure and increases under pressure. With an increase of the pressure, the relative content of ethene or propene decreases and that of methane, ethane, or propane increases simultaneously. In the liquid products, cyclopentane, cyclopentene, 1,3-cyclopentadiene, and cis-bicyclo[3.3.0]oct-2-ene are found to be major components. Substituted cyclopentene, benzene, toluene, and naphthalene are also observed under high pressures and temperatures. A probable mechanism of the thermal cracking of JP-10 is proposed to explain the product distribution. The process of isomerization might be dominating for liquid product formation during the thermal cracking under elevated pressure. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801128f