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Results for DC.creator="A." AND DC.creator="Podjarny" in section 16.3.5 of volume F |
Cluster analysis
International Tables for Crystallography (2012). Vol. F, Section 16.3.5.5, p. 441 [ doi:10.1107/97809553602060000852 ]
... 1990, 1995; Buehler et al., 2009). Cluster analysis is a branch of applied mathematics aimed at classifying a set of points in a multidimensional space into several compact groups called clusters (or ...
Phase averaging and assignment of the probability distribution
International Tables for Crystallography (2012). Vol. F, Section 16.3.5.4, pp. 440-441 [ doi:10.1107/97809553602060000852 ]
... with [theta] = [varphi]best, I1(T)/I0(T) = m, or a bimodal distribution,(Hendrickson & Lattman, 1970). These distributions may be ... phases at the next cycle of phasing. References Hendrickson, W. A. & Lattman, E. E. (1970). Representation of phase probability distributions ...
Multiple alignment and `central' phase set
International Tables for Crystallography (2012). Vol. F, Section 16.3.5.3, p. 440 [ doi:10.1107/97809553602060000852 ]
... when applied to several phase sets simultaneously. The choice of a `central' point of reference seems to be a reasonable solution, provided it minimizes the dispersion of the phase sets. To do so, let be a `cloud' of selected phase sets considered as points in ...
Phase ambiguity and alignment of phase sets
International Tables for Crystallography (2012). Vol. F, Section 16.3.5.2, p. 440 [ doi:10.1107/97809553602060000852 ]
... added as an allowed operation in the alignment process. Finally, a density transformation [rho](r)-->-[rho](r) preserves the magnitudes, changes the phases by [pi] and flips the envelopes for a given cutoff level. In order to assess which of the ... molecular envelopes is more probable, [rho](r) or -[rho](r), a generalized maximum-likelihood technique can be used (Lunin et ...
Formal comparison of phase sets
International Tables for Crystallography (2012). Vol. F, Section 16.3.5.1, pp. 439-440 [ doi:10.1107/97809553602060000852 ]
... quantities has its own disadvantage. The first is influenced by a number of weak reflections with poor phases that do not ... On the other hand, C[varphi] is influenced mostly by a small number of very strong reflections and is not so ... in resolution shells are applied to attenuate these effects. If a collection of phase sets is considered as a cloud ...
Processing of the output
International Tables for Crystallography (2012). Vol. F, Section 16.3.5, pp. 439-441 [ doi:10.1107/97809553602060000852 ]
... The output of the selection procedure may be presented as a two-dimensional table. In this table, each column represents one ... by the phase value in different selected phase sets. If a selected phase set is considered as a point in multidimensional configuration space of all phase sets, ...
International Tables for Crystallography (2012). Vol. F, Section 16.3.5.5, p. 441 [ doi:10.1107/97809553602060000852 ]
... 1990, 1995; Buehler et al., 2009). Cluster analysis is a branch of applied mathematics aimed at classifying a set of points in a multidimensional space into several compact groups called clusters (or ...
Phase averaging and assignment of the probability distribution
International Tables for Crystallography (2012). Vol. F, Section 16.3.5.4, pp. 440-441 [ doi:10.1107/97809553602060000852 ]
... with [theta] = [varphi]best, I1(T)/I0(T) = m, or a bimodal distribution,(Hendrickson & Lattman, 1970). These distributions may be ... phases at the next cycle of phasing. References Hendrickson, W. A. & Lattman, E. E. (1970). Representation of phase probability distributions ...
Multiple alignment and `central' phase set
International Tables for Crystallography (2012). Vol. F, Section 16.3.5.3, p. 440 [ doi:10.1107/97809553602060000852 ]
... when applied to several phase sets simultaneously. The choice of a `central' point of reference seems to be a reasonable solution, provided it minimizes the dispersion of the phase sets. To do so, let be a `cloud' of selected phase sets considered as points in ...
Phase ambiguity and alignment of phase sets
International Tables for Crystallography (2012). Vol. F, Section 16.3.5.2, p. 440 [ doi:10.1107/97809553602060000852 ]
... added as an allowed operation in the alignment process. Finally, a density transformation [rho](r)-->-[rho](r) preserves the magnitudes, changes the phases by [pi] and flips the envelopes for a given cutoff level. In order to assess which of the ... molecular envelopes is more probable, [rho](r) or -[rho](r), a generalized maximum-likelihood technique can be used (Lunin et ...
Formal comparison of phase sets
International Tables for Crystallography (2012). Vol. F, Section 16.3.5.1, pp. 439-440 [ doi:10.1107/97809553602060000852 ]
... quantities has its own disadvantage. The first is influenced by a number of weak reflections with poor phases that do not ... On the other hand, C[varphi] is influenced mostly by a small number of very strong reflections and is not so ... in resolution shells are applied to attenuate these effects. If a collection of phase sets is considered as a cloud ...
Processing of the output
International Tables for Crystallography (2012). Vol. F, Section 16.3.5, pp. 439-441 [ doi:10.1107/97809553602060000852 ]
... The output of the selection procedure may be presented as a two-dimensional table. In this table, each column represents one ... by the phase value in different selected phase sets. If a selected phase set is considered as a point in multidimensional configuration space of all phase sets, ...
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