scholarly journals The frequency spectrum of finite samples from the intermittent silence process

2009 ◽  
Vol 60 (4) ◽  
pp. 837-843 ◽  
Author(s):  
Ramon Ferrer-i-Cancho ◽  
Ricard Gavaldà
Keyword(s):  
Frequency Spectrum ◽  
Finite Samples

scholarly journals The neutral frequency spectrum of linked sites

2017 ◽  
Author(s):  
Luca Ferretti ◽  
Alexander Klassmann ◽  
Emanuele Raineri ◽  
Sebastián E. Ramos-Onsins ◽  
Thomas Wiehe ◽  
...  
Keyword(s):  
Frequency Spectrum ◽  
Large Population ◽  
Exact Expression ◽  
Genomic Region ◽  
General Interest ◽  
Kolmogorov Equations ◽  
Finite Samples ◽  
Neutral Marker ◽  
Coalescent Approach ◽  
Neutrality Tests

AbstractWe introduce the conditional Site Frequency Spectrum (SFS) for a genomic region linked to a focal mutation of known frequency. An exact expression for its expected value is provided for the neutral model without recombination. Its relation with the expected SFS for two sites, 2-SFS, is discussed. These spectra derive from the coalescent approach of Fu (1995) for finite samples, which is reviewed. Remarkably simple expressions are obtained for the linked SFS of a large population, which are also solutions of the multiallelic Kolmogorov equations. These formulae are the immediate extensions of the well known single site θ/f neutral SFS. Besides the general interest in these spectra, they relate to relevant biological cases, such as structural variants and introgressions. As an application, a recipe to adapt Tajima’s D and other SFS-based neutrality tests to a non-recombining region containing a neutral marker is presented.

Frequency Spectrum Evolution of Quasi-Optical Dielectric Resonators with Conducting Endplates

2002 ◽  
Vol 57 (12) ◽  
pp. 10 ◽  
Author(s):  
Nikolay T. Cherpak ◽  
A. A. Barannik ◽  
Yu.V. Prokopenko ◽  
Yu. F. Filippov ◽  
T.A. Smirnova
Keyword(s):  
Frequency Spectrum ◽  
Dielectric Resonators ◽  
Optical Dielectric

Algorithm for diagnosing fastenings of pipe with liquid

2007 ◽  
Vol 5 ◽  
pp. 96-100
Author(s):  
A.M. Akhtyamov ◽  
F.F. Safina
Keyword(s):  
Frequency Spectrum ◽  
Natural Frequencies ◽  
Algebraic Equations ◽  
Bending Vibrations ◽  
Narrow Tube

An algorithm is considered for diagnosing fastening of a narrow tube filled with a fluid by a spectrum of natural frequencies of its bending vibrations. The constructed algorithm, based on the solution of systems of algebraic equations, allows one to determine any pipe fastenings by 9 values from the frequency spectrum of its vibrations when the liquid is flowing through the pipe.

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