Results 31 to 40 of about 3,323,835 (313)

FITEXC – DIFFRACTION PROFILE FITTING PROGRAM RUN IN MS EXCEL

Acta Polytechnica CTU Proceedings, 2018
We present our custom made diffraction fitting program FitExc for the basic treatment of the 1D diffraction profiles, in particular, the Intensity(2θ) of X-ray, synchrotron or neutron diffraction measurements. In the current state, the program allows for
Petr Vertat, Jan Drahokoupil
doaj   +1 more source

Determination of Parabolic Rate Constants from a Local Analysis of Mass-Gain Curves [PDF]

, 1998
A method is proposed to allow a more accurate evaluation of thermogravimetric data to identify diffusion or partial diffusion control of scaling kinetics. This method is based on the fitting of mass-gain data to a parabola over a short time interval. The
Monceau, Daniel, Pieraggi, Bernard
core   +1 more source

Simultaneous fitting of X-ray and neutron diffuse scattering data [PDF]

Acta Crystallographica Section A Foundations of Crystallography, 2006
Conventional crystallographic refinement uses the Bragg-peak intensities and gives the single-site average crystal structure. Information about short-range order and local order is contained in the diffuse scattering that is distributed throughout reciprocal space. Models of the short-range order in materials can now be automatically refined.
Goossens, Darren, Welberry, Thomas, Heerdegen, Aidan, Gutmann, M J   +3 more
openaire   +3 more sources

PLANET: An ellipse fitting approach for simultaneous T1 and T2 mapping using phase‐cycled balanced steady‐state free precession

Magnetic Resonance in Medicine, 2017
To demonstrate the feasibility of a novel, ellipse fitting approach, named PLANET, for simultaneous estimation of relaxation times T1 and T2 from a single 3D phase‐cycled balanced steady‐state free precession (bSSFP) sequence.
Yulia Shcherbakova, C. V. D. van den Berg, C. Moonen, L. Bartels   +3 more
semanticscholar   +1 more source

Universal dynamic fitting of magnetic resonance spectroscopy

bioRxiv, 2023
Dynamic (2D) magnetic resonance spectroscopy is a collection of techniques where acquisitions of spectra are repeated under varying experimental or physiological conditions.
William T. Clarke, Clémence Ligneul, M. Cottaar, I. B. Ip, S. Jbabdi   +4 more
semanticscholar   +1 more source

Simultaneous multi-parameter analysis of detonation field based on line fitting of wavelength modulated second harmonic signals

AIP Advances, 2023
In the wavelength modulation method of laser absorption spectroscopy, the second harmonic signal contains numerous information about the flow field parameters.
Yinglian Yang, Ning Li, Xiaolong Huang, Yang Kang, Can Li, Xudong Fan, Chunsheng Weng   +6 more
doaj   +1 more source

Reducing Zero-point Systematics in Dark Energy Supernova Experiments [PDF]

, 2010
We study the effect of filter zero-point uncertainties on future supernova dark energy missions. Fitting for calibration parameters using simultaneous analysis of all Type Ia supernova standard candles achieves a significant improvement over more ...
A. Bonissent, A. Stebbins, A.G. Kim, Aldering, Amanullah, Astier, Branch, C. Stoughton, Cardelli, Copin, D. Gerdes, D. Tucker, Dawson, de Putter, E.V. Linder, G. Bernstein, G. Kushner, H. Shukla, Hicken, Hsiao, J. Christiansen, Kim, Kim, Kowalski, L. Faccioli, L. Gladney, Linder, Linder, Linder, M. Brown, N. Connolly, N. Mostek, Nordin, Perlmutter, Perlmutter, R. Miquel, Riess, S. Deustua, S. McKee, Samsing, W. Carithers, Wood-Vasey   +41 more
core   +5 more sources

Weighing the ocean with bottom-pressure sensors: robustness of the ocean mass annual cycle estimate [PDF]

Ocean Science, 2014
We use ocean bottom-pressure measurements from 17 tropical sites to determine the annual cycle of ocean mass. We show that such a calculation is robust, and use three methods to estimate errors in the mass determination.
Joanne Williams, C. W. Hughes, M. E. Tamisiea, S. D. P. Williams   +3 more
doaj   +1 more source

Improved allometric models to estimate the aboveground biomass of younger secondary tropical forests

Global Ecology and Conservation, 2023
Frequent human activities have resulted in a large number of tropical old-growth forests being replaced by secondary forests at different succession stages.
Bin Liu, Wensheng Bu, Runguo Zang
doaj   +1 more source

Likelihood-based inference for max-stable processes [PDF]

, 2009
The last decade has seen max-stable processes emerge as a common tool for the statistical modeling of spatial extremes. However, their application is complicated due to the unavailability of the multivariate density function, and so likelihood-based ...
Padoan, Simone A., Ribatet, Mathieu, Sisson, Scott A.   +2 more
core   +6 more sources