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random orientations
, 2014
"... A functional expression is introduced that relates scattered Xray intensities from a still or a rotation snapshot to the corresponding structurefactor amplitudes. The new approach was implemented in the program nXDS for processing monochromatic diffraction images recorded by a multisegment detect ..."
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of the technique of ‘selective breeding’. It selects the indexing alternative for each image that yields, on average, the highest correlation with intensities from all other images. Processing a test set of rotation images by XDS and treating the same images by nXDS as snapshots of crystals in random orientations
RANDOMLY ORIENTED LATTICES
"... Abstract.The square lattice is used to generate an oriented graph in which a rightward or upward arrow is present on each edge with probability a, and a leftward or downward arrow with probability b. Independence between different edges of the square lattice is assumed, but nothing is assumed concer ..."
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problem in which each horizontal edge is oriented rightwards with probability p and otherwise leftwards, and each vertical edge is oriented upwards with probability p and otherwise downwards. 1. Randomly oriented square lattice Despite the relative maturity of percolation theory (see [4]) there remain a
Random Walks on Randomly Oriented Lattices
 Markov Proc. Rel. Fields
, 1990
"... Simple random walks on various types of partially horizontally oriented regular lattices are considered. The horizontal orientations of the lattices can be of various types (deterministic or random) and depending on the nature of the orientation the asymptotic behaviour of the random walk is shown t ..."
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Cited by 23 (6 self)
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Simple random walks on various types of partially horizontally oriented regular lattices are considered. The horizontal orientations of the lattices can be of various types (deterministic or random) and depending on the nature of the orientation the asymptotic behaviour of the random walk is shown
Image denoising using a scale mixture of Gaussians in the wavelet domain
 IEEE TRANS IMAGE PROCESSING
, 2003
"... We describe a method for removing noise from digital images, based on a statistical model of the coefficients of an overcomplete multiscale oriented basis. Neighborhoods of coefficients at adjacent positions and scales are modeled as the product of two independent random variables: a Gaussian vecto ..."
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Cited by 510 (17 self)
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We describe a method for removing noise from digital images, based on a statistical model of the coefficients of an overcomplete multiscale oriented basis. Neighborhoods of coefficients at adjacent positions and scales are modeled as the product of two independent random variables: a Gaussian
NOTE PREPARATION OF RANDOMLYORIENTED SAMPLES FOR
"... In the examination of clays by Xray diffractometry considerable attention has been paid to the production of specimens with a high degree of parallel orientation of the clay particles (Gibbs, 1965). A variety of methods have been employed including sedimentation on a glass slide, smearing a paste o ..."
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requiring only 01 nag of sample. However, for the full characterization f a soil clay or the examination of accessot"y minerals, which may not have lamellar structures, randomlyoriented samples must also be examined. This dramatically increases the amount of sample required and, for the examination
Theory for the development of neuron selectivity: orientation specificity and binocular interaction in visual cortex
 J. Neurosci
, 1982
"... The development of stimulus selectivity in the primary sensory cortex of higher vertebrates is considered in a general mathematical framework. A synaptic evolution scheme of a new kind is proposed in which incoming patterns rather than converging afferents compete. The change in the efficacy of a gi ..."
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Cited by 428 (20 self)
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environment. One does not require nonlinearity of the neuron’s integrative power nor does one need to assume any particular form for intracortical circuitry. This is first illustrated in simple cases, e.g., when the environment consists of only two different stimuli presented alternately in a random manner
ON A PROPERTY OF RANDOMORIENTED PERCOLATION IN A QUADRANT
"... ABSTRACT. Grimmett’s randomorientation percolation is formulated as follows. The square lattice is used to generate an oriented graph such that each edge is oriented rightwards (resp. upwards) with probability p and leftwards (resp. downwards) otherwise. We consider a variation of Grimmett’s model ..."
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ABSTRACT. Grimmett’s randomorientation percolation is formulated as follows. The square lattice is used to generate an oriented graph such that each edge is oriented rightwards (resp. upwards) with probability p and leftwards (resp. downwards) otherwise. We consider a variation of Grimmett’s model
Scattering cross sections of randomly oriented coated spheroids
, 1998
"... The extended boundary condition method (EBCM), or Tmatrix method, has been applied to the determination of scattering cross sections of coated spheroidal particles in random orientation. We report the e!ects of varying size and core/shell ratio for a number of axial ratios. Di!erent scattering prop ..."
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Cited by 1 (0 self)
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The extended boundary condition method (EBCM), or Tmatrix method, has been applied to the determination of scattering cross sections of coated spheroidal particles in random orientation. We report the e!ects of varying size and core/shell ratio for a number of axial ratios. Di!erent scattering
NOTES RANDOMLY ORIENTATED POWDERS FOR QUANTITAT IVE
"... One of the requirements for quantitative mineralogical analysis of clay materials by Xray diffraction is a simple and reproducible method of specimen preparation. A major source of difficulty in this respect is the tendency for clay minerals of platy morphology to assume a preferred orientation whi ..."
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which cannot be reproduced exactly from sample to sample. In these circumstances accurate measurements of the intensities of the Xray reflections become somewhat meaningless. Various methods have been used to obtain randomly orientated specimens. For example, Brindley & Kurtossy (1961) developed a
Results 1  10
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636,987