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Displacive Phase Transformations and Phonons
1994The use of first principles calculations to help understand materials properties has gone from wishful thinking, to feasible, to invaluable, largely because of the doubling of computing power every 18 months for the last 30 years,. We are still, however, just beginning the era when such calculations will become a factor in the synthesis, processing ...
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Displacive Phase Transitions at Large Strains: Phase-Field Theory and Simulations
Physical Review Letters, 2009The Landau potential for multivariant displacive phase transformations (PTs) is derived for the most general case of large rotations, elastic and transformational strains, as well as nonlinear and different elastic properties of phases. The method of repetitive superposition of large strains is extended for PTs and is utilized in the finite-element ...
Levitas, Valery +3 more
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Note: Phase retrieval method for analyzing single-phase displacement interferometry data
Review of Scientific Instruments, 2014We present a phase retrieval method (PRM) for analyzing single-phase displacement interferometry measurements on rapidly changing velocity histories, including photon Doppler velocimetry (PDV). PRM identifies the peaks and valleys as well as zero-crossing points in a PDV time series, performs normalization and extracts point-by-point phase and thus ...
X H, Chen +6 more
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Elemental Interfaces and Displacive Phase Transformations
Advances in Science and Technology, 2008Two basic processes, namely shear and shuffling of atomic planes can be considered as elementary mechanisms of displacive phase transformations. The atomistic models suitable to investigate the role of interfaces in the structural changes are tested. The many-body potentials are used for the description of interatomic forces.
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Continuously adjustable phase center displacement in phased array antenna
IEEE Antennas and Propagation Society International Symposium 1992 Digest, 1992A simple method is presented for electrically shifting the phase center of an array by an arbitrary distance. This is accomplished by adding an amplitude slope to the array excitation function. For an array with uniform illumination a formula for calculating the amplitude slope is given.
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Statistical and phase properties of displaced Kerr states
Physical Review A, 1991We study the statistical and phase properties of the output states of a Mach-Zehnder interferometer with a nonlinear Kerr medium in one of its arms. The combination of nonlinearity and displacement produced by the interferometer generates output states (displaced Kerr states) that, unlike those derived from a Kerr medium alone (Kerr states), do not ...
, Wilson-Gordon, , Buek, , Knight
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Multidimensional Displacement Vector Measurement Methods Utilizing Instantaneous Phase
2005 IEEE Engineering in Medicine and Biology 27th Annual Conference, 2005In this report, we propose two new methods for measuring multidimensional displacement vector using instantaneous ultrasound signal phase, i.e., the multidimensional autocorrelation method and the multidimensional Doppler's method. In order to realize high measurement accuracy, respective displacement vector measurement methods are combined with our ...
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Displacive Phase Transformations in Nanometric Dimension
Transactions of the Indian Institute of Metals, 2022S. Neogy, D. Srivastava
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Gas-phase nucleophilic displacement reactions
Journal of the American Chemical Society, 1974John I. Brauman +2 more
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