Characterizations of L p (R) using tight wavelet frames

Lu, Dayong; Fan, Qing‐Hua

doi:10.1007/s11859-010-0684-9

Cited by 13 publications

(13 citation statements)

References 11 publications

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“…Relative densities of Zn-modified samples are all above 90% and increase with the content of ZnO. The radius of Zn 2+ , Zr 4+ , Ce 4+ and O 2are 0.074nm, 0.072nm, 0.087nm and 0.140nm, respectively [17]. The ratio of r Zr to r O is 0.53.…”

Section: Resultsmentioning

confidence: 91%

Fabrication and Properties of Ba(Zr0.63Ce0.27)Y0.1O3-δ/ZnO Electrolyte Materials

Guo

Gao

et al. 2012

KEM

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The perovskite-type Ba(Zr0.63Ce0.27)Y0.1O3-δ (BZCY) was synthesized by solid-state reaction. Sintering behavior and electrical conductivity of the electrolyte materials were improved through optimizing the content of ZnO as sintering aid. The obvious enhancement of density of sintered body was observed due to ZnO reacting with BZCY powder. Relative densities of the samples increased with ZnO content added. A conductivity of 9.27×10-3 S/cm tested in humid hydrogen at 800°C was obtained when the ZnO content was 2 mol%. A peak power density of 12.4 mW/cm2 was delivered based on a single fuel cell with electrolyte-supported configuration.

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Section: Resultsmentioning

confidence: 91%

Fabrication and Properties of Ba(Zr0.63Ce0.27)Y0.1O3-δ/ZnO Electrolyte Materials

Guo

Gao

et al. 2012

KEM

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“…As discussed above, the reaction of diazide and internal diyne meets the n th‐order model, which shows a near second‐order reaction characteristic. In our previous study, the kinetics of diazide and two terminal diynes was studied ; the E α of diazide and internal diyne is a little higher than those of diazide and terminal diynes because of maybe larger steric hindrance of internal diyne or a different reaction mechanism. For diazide and terminal diynes, the reactions are both first‐order reactions, which indicates that the reaction between diazide and internal diyne, diazide, and terminal diyne possesses different mechanisms.…”

Section: Resultsmentioning

confidence: 99%

Kinetic Study of the Thermal Polymerization Reactions between Diazide and Internal Diyne

Liu

Wan

Huang

et al. 2014

Int. J. Chem. Kinet.

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The reaction kinetics between diazide(4,4′‐biphenyl dibenzyl azide) and internal diyne(bis[2‐(phenyl)ethynyl]dimethylsilane) was studied in this study by means of differential scanning calorimetry (DSC) and nuclear magnetic resonance spectra (1H NMR). DSC was carried out to analyze the reaction in bulk polymerization condition, whereas 1H NMR for solution reaction polymerization. The apparent activation energy (eα) calculated by Kissinger's method was 90.83 kJ/mol, which was confirmed by Friedman's method, and 87.67 kJ/mol by 1H NMR, respectively. The polymerization between the diazide and internal diyne was the second‐order reaction based on calculation from both of DSC and 1H NMR.

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“…On the contrary, the statistics showed that the B3LYP hybrid functional is superior to other forms of functional groups in many aspects. The estimation and calculation of the thermochemical properties of small and medium-sized systems are in the developing stage . C–S BDEs of small fragments were calculated, which revealed that the bond strength ranked as [C ar –S]–S–C ar > C ar –[S–S]–C ar > [C ar –S], and they were all proved by the experimental data.…”

Section: Introductionmentioning

confidence: 84%

Relationship between Organic Sulfur Occurrence and Coalification Stage: Insights from Thermodynamic Simulation and X-ray Photoelectron Spectroscopy

Zhu

Liu

et al. 2023

Energy Fuels

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Organic sulfur in coal can pollute the atmosphere due to the emission of SO x gas during coal combustion and utilization. Although the relative distributions of the different organosulfur functional groups change with progressive coalification (maturity), how these groups are incorporated in the macromolecule structures of coals and the role they play in the coalification process remain ambiguous. The purpose of this study, then, is to elucidate these relationships by using thermodynamic simulation with a reactive force field program, calculation of the C–S bond dissociation energies of four types of organosulfur functional groups, X-ray photoelectron spectroscopy (XPS) analysis of seven coal samples, and published data to determine the changes in the types and proportions of organosulfur functional groups in three coalification stages (0–1, 1–2, and >2% Ro). The results show that the bond stabilities follow the order Cal–S < S–S < Car–S. Disulfides and thioethers occur in lower contributions in the coalification stage of 0–2% Ro, while mercaptans present in a relatively higher proportion. The contribution of sulfone increases and exceeds a half in organosulfur at 1–2% Ro; the major role of sulfur turns from edge bond (0–1% Ro) to bridge bond (1–2% Ro) gradually. Thiophene decreases in the 0–1% Ro coalification stage and increases in relatively high proportions in the 1–2% Ro coalification stage. When the coalification stage is above 2% Ro, the contributions of sulfides, sulfone, and mercaptan decrease, while that of thiophene increases, and sulfur gradually acts as a thiophenic ring bond. These results demonstrate that the role of organosulfur in the macromolecular skeleton of coal changes with progressive coalification.

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Characterizations of L p (R) using tight wavelet frames

Cited by 13 publications

References 11 publications

Fabrication and Properties of Ba(Zr<sub>0.63</sub>Ce<sub>0.27</sub>)Y<sub>0.1</sub>O<sub>3-δ</sub>/ZnO Electrolyte Materials

Fabrication and Properties of Ba(Zr<sub>0.63</sub>Ce<sub>0.27</sub>)Y<sub>0.1</sub>O<sub>3-δ</sub>/ZnO Electrolyte Materials

Kinetic Study of the Thermal Polymerization Reactions between Diazide and Internal Diyne

Relationship between Organic Sulfur Occurrence and Coalification Stage: Insights from Thermodynamic Simulation and X-ray Photoelectron Spectroscopy

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