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degree of order and two-dimensional hexagonal structure, were synthesized from fly ash with template agent EO20PO70EO20(P123) in strong acidic medium by using alkali-hydrothermal synthesis method..., the removal percentage of Pb2+ increases. The kinetic processes of Pb2+ is fitted better with pseudo-second-order. The adsorption data of Pb2+ by NH2-SBA-15 is fitted better with Langmuir model......
J. Cent. South Univ. Technol. (2007)06-0848-05 DOI: 10.1007/s11771-007-0161-6 An HHT-based method to eliminate... South University, Changsha 410075, China) Abstract:According to the characteristic that Hilbert-Huang transform (HHT) can detect abnormity in signals, an HHT-based method to eliminate short-time......
by the fitted distribution. 2 Method 2.1 Extreme value distribution One of the currently most used methods in extreme value analyses is the peaks-over-threshold (POT) model in which the excesses above... used to evaluate the goodness-of-fit as well. Thirdly, the return levels corresponding to different return periods were calculated by the fitted distributions. The fitting results show......
by passive surface and new interface, respectively. An equivalent circuit is designed to fit EIS, and the experimental results and the fitted results have good correspondence. The degree and severity... propagation. Cps decreases and Cni increases with immersion time prolonging. This indicates the decrease of passive surface, the increase and growth of pit. Capacitance C is defined by the equation: C=εS/d......
and magnetic susceptibility studies of Th3+(4f8) ions in TbAlO3 by Gruber et al.(J.Lumin.128 (2008) 1271) were reanalyzed.These sets,fitted from experimental energy levels,are physically equivalent...) monoclinic standardization of CFPs,(d) distinction between the actual and apparent low symmetry effects exhibited by CFPs,and (e) nominal nature of all fitted CFP sets.For this purpose,modeling of CFPs......
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time 2h, and the pH value was equivalent to 6.5, over 99% of the phosphorus was removed; the experimental data on steel slag adsorption of phosphorus in the water fitted the Freundlich isotherm model......
structure and magnetic susceptibility were studied. High-temperature susceptibility could be well fitted by Curie-Weiss law for all Sr-doped samples. Weiss constant and effective magnetic moment were......
better hydriding kinetics than that of the as-cast Mg3La alloy at room temperature. The kinetic curve could be well fitted by Avrami-Erofeev equation. Key words:hydrogen storage; magnesium based......
of Applied Science, University of Technology Beijing, Beijing 100022, China) Abstract:The optical quality of Er3+, Yb3+: BaWO4 crystal was grown by Czochralski method. Absorption spectra were measured and energy levels were assigned. According to Judd-Ofelt theory, the spectral strength parameters of Er3+ ion were fitted to be Ω2=0.3926×10-20 cm2, Ω4=0.0721×10-20 cm2, Ω6=0.0028×10-20 cm2. Emission......
