Error analysis of the determination of complex permittivity with an electric-, field cross-correlation Fourier transform technique

1994 ◽  
Author(s):  
Hanyi Ding
Keyword(s):  
Fourier Transform ◽  
Error Analysis ◽  
Electric Field ◽  
Complex Permittivity ◽  
Cross Correlation

FIDDLE. Simultaneous Indexing and Structure Solution from Powder Diffraction Data using a Genetic Algorithm and Correlation Functions

2019 ◽  
Author(s):  
Carmen Guguta ◽  
Jan M.M. Smits ◽  
Rene de Gelder
Keyword(s):  
Genetic Algorithm ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Correlation Functions ◽  
Cross Correlation ◽  
Simultaneous Optimization ◽  
Powder Diffraction Data ◽  
Structure Solution ◽  
Matching Technique

A method for the determination of crystal structures from powder diffraction data is presented that circumvents the difficulties associated with separate indexing. For the simultaneous optimization of the parameters that describe a crystal structure a genetic algorithm is used together with a pattern matching technique based on auto and cross correlation functions.<br>

scholarly journals Relationship between the system of Astronomical constants and the radar determinations of the Astronomical Unit

1965 ◽  
Vol 21 ◽  
pp. 153-175
Author(s):  
D. O. Muhleman
Keyword(s):  
Error Analysis ◽  
Astronomical Unit ◽  
Astronomical Constants

This paper is devoted to an exact discussion of the determination of the astronomical unit with radar and to an extensive error analysis of the technique. Theoretical relationships between the constants are used to construct a consistent set of numerical values of constants based on these results.

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