Neutron Scattering Data Analysis 1990, Proceedings of the Conference on Neutron Scattering, 14-16 March 1990, Rutherford Appleton Laboratory, UKM. W. Johnson |
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Page 5
... positive , we require C to be a positive - definite matrix . Correspondingly , y must have strictly positive Fourier transform , which allows a Gaussian or Lorentzian , but not a square wave . Whichever form for y is chosen , it should ...
... positive , we require C to be a positive - definite matrix . Correspondingly , y must have strictly positive Fourier transform , which allows a Gaussian or Lorentzian , but not a square wave . Whichever form for y is chosen , it should ...
Page 108
... positive distribution by means of the difference of two positive distributions , which amounts to looking for a positive distribution of twice the initial size , has first been used success- fully in N.M.R. data analysis . The Maximum ...
... positive distribution by means of the difference of two positive distributions , which amounts to looking for a positive distribution of twice the initial size , has first been used success- fully in N.M.R. data analysis . The Maximum ...
Page 115
... positive / negative or a positive definite magnetisation density are shown in ( C , D ) and ( E , F ) . The positive / negative map shows some negative density close to high symmetry points in projected cell . Although most probably due ...
... positive / negative or a positive definite magnetisation density are shown in ( C , D ) and ( E , F ) . The positive / negative map shows some negative density close to high symmetry points in projected cell . Although most probably due ...
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additional algorithm allows analysis angle applications approach atoms average beam Bragg calculated cell combinatorial optimization configuration constant coordinates correction corresponding cost counts cross-section crystal deconvolution defined density dependent described detector determined diffraction direct display distribution effects elastic scattering energy error estimate example experiment experimental Figure final Fourier function give given inelastic intensity ISIS known limit magnetic Maximum Entropy measured method neutron neutron scattering normalization obtained optimization parameters particular peak performed Phys physical plot positive possible powder presented prior probability problem procedure radial distribution functions range reconstruction References refinement reflections resolution sample scale scan shown shows simulated annealing single solution space spectrum standard statistical structure factor temperature transfer transform unit usually vanadium vector wavelength