Documents disponibles écrits par cet auteur

1.8 pJ/pulse programmable Gaussian pulse generator for full-band noncarrier impulse-UWB transceivers in 90-nm CMOS / Qin, Bo in IEEE transactions on industrial electronics, Vol. 57 N° 5 (Mai 2010) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 57 N° 5 (Mai 2010) . - pp. 1555 - 1562 Titre : 1.8 pJ/pulse programmable Gaussian pulse generator for full-band noncarrier impulse-UWB transceivers in 90-nm CMOS Type de document : texte imprimé Auteurs : Qin, Bo, Auteur ; Xin Wang, Auteur ; Xie, Haolu, Auteur Année de publication : 2011 Article en page(s) : pp. 1555 - 1562 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Gaussian  pulse  generator  (PG)  Impulse  radio  (IR)  Ultrawideband  (UWB) Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents a single-chip ultralow power programmable Gaussian pulse generator (PG) designed and implemented in the 90-nm CMOS for 3.1-10.6 GHz full-band impulse-radio ultrawideband (UWB) transmitters. Measurement shows that this novel simple two-inverter-based PG achieves the lowest reported power dissipation of merely 1.8 pJ/pulse with a 100-MHz pulse-repeating frequency at 1-V supply, extremely short and programmable pulsewidth ranging from 150 to 350 ps while covering the full 3.1-10.6 GHz UWB spectrum, and a very small area of 0.0068 mm2. It supports up to 6 Gb/s data rate for UWB wireless streaming. A new Federal-CommunicationCommission-aware Gaussian PG design optimization method is discussed and verified experimentally. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5210165 [article] 1.8 pJ/pulse programmable Gaussian pulse generator for full-band noncarrier impulse-UWB transceivers in 90-nm CMOS [texte imprimé] / Qin, Bo, Auteur ; Xin Wang, Auteur ; Xie, Haolu, Auteur . - 2011 . - pp. 1555 - 1562. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 57 N° 5 (Mai 2010) . - pp. 1555 - 1562 Mots-clés : Gaussian  pulse  generator  (PG)  Impulse  radio  (IR)  Ultrawideband  (UWB) Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents a single-chip ultralow power programmable Gaussian pulse generator (PG) designed and implemented in the 90-nm CMOS for 3.1-10.6 GHz full-band impulse-radio ultrawideband (UWB) transmitters. Measurement shows that this novel simple two-inverter-based PG achieves the lowest reported power dissipation of merely 1.8 pJ/pulse with a 100-MHz pulse-repeating frequency at 1-V supply, extremely short and programmable pulsewidth ranging from 150 to 350 ps while covering the full 3.1-10.6 GHz UWB spectrum, and a very small area of 0.0068 mm2. It supports up to 6 Gb/s data rate for UWB wireless streaming. A new Federal-CommunicationCommission-aware Gaussian PG design optimization method is discussed and verified experimentally. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5210165

A 52-mW 3.1–10.6-GHz fully integrated correlator for IR-UWB transceivers in 0.18 $muhbox{m}$ CMOS / Xie, Haolu in IEEE transactions on industrial electronics, Vol. 57 N° 5 (Mai 2010) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 57 N° 5 (Mai 2010) . - pp. 1546 - 1554 Titre : A 52-mW 3.1–10.6-GHz fully integrated correlator for IR-UWB transceivers in 0.18 $muhbox{m}$ CMOS Type de document : texte imprimé Auteurs : Xie, Haolu, Auteur ; Xin Wang, Auteur ; Lin, Lin, Auteur Année de publication : 2011 Article en page(s) : pp. 1546 - 1554 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Correlator  Impulse  radio  (IR)  Linearity  ultrawideband  (UWB) Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Correlators play key roles in impulse radio ultrawideband (IR-UWB) transceivers. Multiplier-based correlator performs correlation-type demodulation in addition to select desired UWB signals by correlating incoming pulses with templates. This paper reports design and implementation of a fully integrated low-power broadband multiplier-based correlator for a 3.1-10.6-GHz fullband IR-UWB receiver in 0.18 μm CMOS that consists of a UWB multiplier core, two UWB pulse generators, single-ended-to-differential-ended converter, a first-order RC integrator with a 200-MHz bandwidth, and a buffer. Measurement results confirm desired correlation-type demodulation and correlation functions with a conversion gain of 11.03 dB, noise figure of 15.7 dB, very low power consumption of 52 mW and a 1-dB compression point of better than -0.8 dBm over a 7.5-GHz bandwidth. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5256229 [article] A 52-mW 3.1–10.6-GHz fully integrated correlator for IR-UWB transceivers in 0.18 $muhbox{m}$ CMOS [texte imprimé] / Xie, Haolu, Auteur ; Xin Wang, Auteur ; Lin, Lin, Auteur . - 2011 . - pp. 1546 - 1554. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 57 N° 5 (Mai 2010) . - pp. 1546 - 1554 Mots-clés : Correlator  Impulse  radio  (IR)  Linearity  ultrawideband  (UWB) Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Correlators play key roles in impulse radio ultrawideband (IR-UWB) transceivers. Multiplier-based correlator performs correlation-type demodulation in addition to select desired UWB signals by correlating incoming pulses with templates. This paper reports design and implementation of a fully integrated low-power broadband multiplier-based correlator for a 3.1-10.6-GHz fullband IR-UWB receiver in 0.18 μm CMOS that consists of a UWB multiplier core, two UWB pulse generators, single-ended-to-differential-ended converter, a first-order RC integrator with a 200-MHz bandwidth, and a buffer. Measurement results confirm desired correlation-type demodulation and correlation functions with a conversion gain of 11.03 dB, noise figure of 15.7 dB, very low power consumption of 52 mW and a 1-dB compression point of better than -0.8 dBm over a 7.5-GHz bandwidth. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5256229

Magnetically separable ZnFe2O4―graphene catalyst and its high photocatalytic performance under visible light irradiation / Yongsheng Fu in Industrial & engineering chemistry research, Vol. 50 N° 12 (Juin 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 12 (Juin 2011) . - pp. 7210-7218 Titre : Magnetically separable ZnFe2O4―graphene catalyst and its high photocatalytic performance under visible light irradiation Type de document : texte imprimé Auteurs : Yongsheng Fu, Auteur ; Xin Wang, Auteur Année de publication : 2011 Article en page(s) : pp. 7210-7218 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Visible  radiation  Photocatalysis  Catalyst Résumé : A magnetically separable ZnFe2O4―graphene nanocomposite photocatalyst with different graphene content was prepared by a facile one-step hydrothermal method. The graphene sheets in this nanocomposite photocatalyst are exfoliated and decorated with ZnFe2O4 nanocrystals. It was found that in the presence of H2O2, the photodegradation rate of methylene blue (MB) was 88% after visible light irradiation for only 5 min and reached up to 99% after irradiation for 90 min. In comparison with pure ZnFe2O4 catalyst, ZnFe2O4―graphene serves a dual function as the catalyst for photoelectrochemical degradation of MB and the generator of a strong oxidant hydroxyl radical (·OH) via photoelectrochemical decomposition of H2O2 under visible light irradiation. ZnFe2O4 nanoparticles themselves have a magnetic property, which makes the ZnFe2O4―graphene composite magnetically separable in a suspension system, and therefore it does not require additional magnetic components as is the usual case. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24239035 [article] Magnetically separable ZnFe2O4―graphene catalyst and its high photocatalytic performance under visible light irradiation [texte imprimé] / Yongsheng Fu, Auteur ; Xin Wang, Auteur . - 2011 . - pp. 7210-7218. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 12 (Juin 2011) . - pp. 7210-7218 Mots-clés : Visible  radiation  Photocatalysis  Catalyst Résumé : A magnetically separable ZnFe2O4―graphene nanocomposite photocatalyst with different graphene content was prepared by a facile one-step hydrothermal method. The graphene sheets in this nanocomposite photocatalyst are exfoliated and decorated with ZnFe2O4 nanocrystals. It was found that in the presence of H2O2, the photodegradation rate of methylene blue (MB) was 88% after visible light irradiation for only 5 min and reached up to 99% after irradiation for 90 min. In comparison with pure ZnFe2O4 catalyst, ZnFe2O4―graphene serves a dual function as the catalyst for photoelectrochemical degradation of MB and the generator of a strong oxidant hydroxyl radical (·OH) via photoelectrochemical decomposition of H2O2 under visible light irradiation. ZnFe2O4 nanoparticles themselves have a magnetic property, which makes the ZnFe2O4―graphene composite magnetically separable in a suspension system, and therefore it does not require additional magnetic components as is the usual case. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24239035

Synergistic effect of graphene on antidripping and fire resistance of intumescent flame retardant poly(butylene succinate) composites / Xin Wang in Industrial & engineering chemistry research, Vol. 50 N° 9 (Mai 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 9 (Mai 2011) . - pp. 5376-5383 Titre : Synergistic effect of graphene on antidripping and fire resistance of intumescent flame retardant poly(butylene succinate) composites Type de document : texte imprimé Auteurs : Xin Wang, Auteur ; Lei Song, Auteur ; Hongyu Yang, Auteur Année de publication : 2011 Article en page(s) : pp. 5376-5383 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Composite  material  Flame  retardant  Fire  resistance  Synergism Résumé : Intumescent flame retardant poly(butylene succinate) (IFRPBS) composites with enhanced fire resistance were prepared using graphene as synergist. The morphology of fracture surfaces of the composites was investigated by scanning electron microscopy (SEM). The limiting oxygen index (LOI) values increased from 23.0 for the pure PBS to 31.0 for IFRPBS with 20 wt % IFR loading. The addition of graphene further improved the LOI values of the composites and exhibited excellent antidripping properties. The UL-94 V0 materials were obtained with a formulation of 18 wt % IFR and 2 wt % graphene. MFI measurement indicated that the presence of graphene significantly enhanced the melt viscosity and restrained the melt dripping. The thermal degradation and gas products of IFRPBS/graphene systems were monitored by thermogravimetric analysis (TGA), real time Fourier transform infrared spectrometry (RTFTIR), and thermogravimetric analysis-Fourier transform infrared spectrometry (TG-FTIR). X-ray photoelectron spectroscopy (XPS) was utilized to explore the chemical components of the outer and inner char residues. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24128660 [article] Synergistic effect of graphene on antidripping and fire resistance of intumescent flame retardant poly(butylene succinate) composites [texte imprimé] / Xin Wang, Auteur ; Lei Song, Auteur ; Hongyu Yang, Auteur . - 2011 . - pp. 5376-5383. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 9 (Mai 2011) . - pp. 5376-5383 Mots-clés : Composite  material  Flame  retardant  Fire  resistance  Synergism Résumé : Intumescent flame retardant poly(butylene succinate) (IFRPBS) composites with enhanced fire resistance were prepared using graphene as synergist. The morphology of fracture surfaces of the composites was investigated by scanning electron microscopy (SEM). The limiting oxygen index (LOI) values increased from 23.0 for the pure PBS to 31.0 for IFRPBS with 20 wt % IFR loading. The addition of graphene further improved the LOI values of the composites and exhibited excellent antidripping properties. The UL-94 V0 materials were obtained with a formulation of 18 wt % IFR and 2 wt % graphene. MFI measurement indicated that the presence of graphene significantly enhanced the melt viscosity and restrained the melt dripping. The thermal degradation and gas products of IFRPBS/graphene systems were monitored by thermogravimetric analysis (TGA), real time Fourier transform infrared spectrometry (RTFTIR), and thermogravimetric analysis-Fourier transform infrared spectrometry (TG-FTIR). X-ray photoelectron spectroscopy (XPS) was utilized to explore the chemical components of the outer and inner char residues. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24128660

Thermal degradation and flame retardance of biobased polylactide composites based on aluminum hypophosphite / Gang Tang in Industrial & engineering chemistry research, Vol. 51 N° 37 (Septembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 37 (Septembre 2012) . - pp. 12009–12016 Titre : Thermal degradation and flame retardance of biobased polylactide composites based on aluminum hypophosphite Type de document : texte imprimé Auteurs : Gang Tang, Auteur ; Xin Wang, Auteur ; Weiyi Xing, Auteur Année de publication : 2012 Article en page(s) : pp. 12009–12016 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Thermal  behavior  Polylactide Résumé : A series of flame retardant polylactide composites (FR-PLA) based on aluminum hypophosphite (AHP) were facilely prepared by melt blending method. The thermal behavior, flammability, and mechanical properties of FR-PLA composites were investigated by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), the UL-94 vertical burning test, limiting oxygen index (LOI), cone calorimeter testing, microscale combustion calorimetry, mechanical testing, and dynamic mechanical analysis (DMA). TGA results showed that the FR-PLA composites presented higher char residue and reduced mass loss rate than neat PLA. The FR-PLA composite showed excellent fire resistance, from no rating of neat PLA to a V0 rating of FR-PLA containing 20 wt % aluminum hypophosphite in the UL-94 test. The microscale combustion calorimetry test showed that the heat release capacity, the peak of heat release and the total heat release of FR-PLA composites were significantly decreased with the increase of AHP content. The cone calorimeter test also confirmed that the addition of AHP resulted in a significant decrease in the peak heat release rate value of PLA/AHP composites compared with pure PLA. Additionally, the results from DSC and DMA tests indicated that the addition of AHP into polylactide significantly changed the crystallization behavior and storage modulus of polylactide. However, the addition of AHP decreases the tensile strength and elongation at break. The char after LOI testing was investigated by scanning electron microscopy and craterlike morphology was observed on the surface of the char. The thermal degradation process of FR-PLA composites was analyzed by real-time Fourier transform infrared spectroscopy. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3008133 [article] Thermal degradation and flame retardance of biobased polylactide composites based on aluminum hypophosphite [texte imprimé] / Gang Tang, Auteur ; Xin Wang, Auteur ; Weiyi Xing, Auteur . - 2012 . - pp. 12009–12016. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 37 (Septembre 2012) . - pp. 12009–12016 Mots-clés : Thermal  behavior  Polylactide Résumé : A series of flame retardant polylactide composites (FR-PLA) based on aluminum hypophosphite (AHP) were facilely prepared by melt blending method. The thermal behavior, flammability, and mechanical properties of FR-PLA composites were investigated by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), the UL-94 vertical burning test, limiting oxygen index (LOI), cone calorimeter testing, microscale combustion calorimetry, mechanical testing, and dynamic mechanical analysis (DMA). TGA results showed that the FR-PLA composites presented higher char residue and reduced mass loss rate than neat PLA. The FR-PLA composite showed excellent fire resistance, from no rating of neat PLA to a V0 rating of FR-PLA containing 20 wt % aluminum hypophosphite in the UL-94 test. The microscale combustion calorimetry test showed that the heat release capacity, the peak of heat release and the total heat release of FR-PLA composites were significantly decreased with the increase of AHP content. The cone calorimeter test also confirmed that the addition of AHP resulted in a significant decrease in the peak heat release rate value of PLA/AHP composites compared with pure PLA. Additionally, the results from DSC and DMA tests indicated that the addition of AHP into polylactide significantly changed the crystallization behavior and storage modulus of polylactide. However, the addition of AHP decreases the tensile strength and elongation at break. The char after LOI testing was investigated by scanning electron microscopy and craterlike morphology was observed on the surface of the char. The thermal degradation process of FR-PLA composites was analyzed by real-time Fourier transform infrared spectroscopy. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3008133

UV-curable functionalized graphene oxide/polyurethane acrylate nanocomposite coatings with enhanced thermal stability and mechanical properties / Bin Yu in Industrial & engineering chemistry research, Vol. 51 N° 45 (Novembre 2012) 

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Wave-induced shallow slides and their features on the subaqueous Yellow River delta / Guohui Xu in Canadian geotechnical journal, Vol. 46 N° 12 (Décembre 2009) 

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