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Multipliers of Laplace Transform Type for Laguerre and Hermite Expansions
Laguerre expansions Hermite expansions harmonic oscillator
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2010/12/6
We present a new criterion for the boundedness in weighted Lp spaces of multiplier operators for Laguerre and Hermite expansions that arise from a Laplace-Stieltjes transform. As a special case, we re...
The discrete Fourier transform of $r$-even functions
periodic function multiplicative function r-even function discrete Fourier transform
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2010/12/14
We give a detailed study of the discrete Fourier transform (DFT) of r-even arithmetic unctions,
which form a subspace of the space of r-periodic arithmetic functions. We consider the DFT of
sequence...
Four Fourier transform spectrometers and the Arctic polar vortex:instrument intercomparison and ACE-FTS validation at Eureka during the IPY springs of 2007 and 2008
Four Fourier transform spectrometers Arctic polar vortex instrument intercomparison ACE-FTS validation
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2010/2/8
The Canadian Arctic Atmospheric Chemistry Experiment Validation Campaigns have been carried out at Eureka, Nunavut (80.05° N, 86.42° W) during the polar sunrise period since 2004. During the Internati...
On-line Vapor-Phase Generation Followed by Fourier-Transform Infrared Spectrometry for the Quantitative Analysis of Water-Soluble Penicillin G in Pharmaceutical Formulations
Vapor-Phase Fourier-Transform Infrared Spectrometry Quantitative Analysis Water-Soluble Penicillin G Pharmaceutical
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2010/9/20
The combination of vapor-phase generation (VPG) and Fourier-transform infrared (FTIR) spectrometry was performed as an alternative analytical technique for the determination of water-soluble penicilli...
Approximate asymptotic integration of a higher order water-wave equation using the inverse scattering transform
Approximate asymptotic integration water-wave equation inverse scattering transform
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2009/11/13
The complete mathematical and physical characterization of nonlinear water wave dynamics has been an important goal since the fundamental partial differential equations were discovered by Euler over 2...
Internal gravity waves:Analysis using the periodic,inverse scattering transform
Internal gravity waves periodic,inverse scattering transform
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2009/11/13
The discrete periodic inverse scattering transform (DPIST) has been shown to provide the salient features of nonlinear Fourier analysis for surface shallow water waves whose dynamics are governed by t...
Application of the cross wavelet transform and wavelet coherence to geophysical time series
cross wavelet transform wavelet coherence geophysical time series
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2009/11/11
Many scientists have made use of the wavelet method in analyzing time series, often using popular free software. However, at present there are no similar easy to use wavelet packages for analyzing two...
A Stochastic Iterative Amplitude Adjusted Fourier Transform algorithm with improved accuracy
AStochastic Iterative Amplitude Fourier Transform algorithm improved accuracy
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2009/11/9
A stochastic version of the Iterative Amplitude Adjusted Fourier Transform (IAAFT) algorithm is presented. This algorithm is able to generate so-called surrogate time series, which have the amplitude ...
Comparison between Local Ensemble Transform Kalman Filter and PSAS in the NASA finite volume GCM–perfect model experiments
Local Ensemble Transform Kalman Filter PSAS NASA finite volume GCM–perfect model
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2009/11/2
This paper compares the performance of the Local Ensemble Transform Kalman Filter (LETKF) with the Physical-Space Statistical Analysis System (PSAS) under a perfect model scenario. PSAS is a 3D-Var as...
Constrained robust estimation of magnetotelluric impedance functions based on a bounded-influence regression M-estimator and the Hilbert transform
robust estimation magnetotelluric impedance functions bounded-influence regression M-estimator
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2009/10/30
Robust impedance estimation procedures are now in standard use in magnetotelluric (MT) measurements and research. These always yield impedance estimates which are better than the conventional least sq...
Rotation-Invariant Texture Analysis and Classification by Artificial Neural Networks and Wavelet Transform
Texture Wavelet transform Artificial neural networks Classification
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2009/10/13
A large number of approaches for texture analysis have been suggested for the purpose of texture classification. Recently, wavelet frames were proposed for texture features extraction. In this study, ...
Long-term tropospheric formaldehyde concentrations deduced from ground-based fourier transform solar infrared measurements
Long-term tropospheric formaldehyde concentrations ground-based fourier transform solar infrared measurements
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2009/9/27
We report a 13-year (1992–2005) dataset of total column measurements of formaldehyde (HCHO) over Lauder, New Zealand, inferred from solar infrared spectra measured using a high-resolution Fourier Tran...
A polarizing Fourier Transform Spectrometer to characterize millimeter-wavelength filters and measure the atmospheric opacity
polarizing Fourier Transform Spectrometer millimeter-wavelength filters atmospheric opacity
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2009/6/25
A polarizing Fourier Transform Spectrometer to characterize millimeter-wavelength filters and measure the atmospheric opacity。
Calculation of Response Spectra from Short-Period WWSSN Records Using the Fourier Transform
Calculation Response Spectra Short-Period WWSSN Records Fourier Transform seismology
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2009/6/16
Calculation of Response Spectra from Short-Period WWSSN Records Using the Fourier Transform.
Full-Field Optical Coherence Tomography Based on Hilbert Transform
Full-field optical coherence tomography (FF-OCT) Phase shifting interferometry (PSI) Hilbert transform
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2009/6/2
Novel image restoration technique suitable for parallel detection in full-field optical coherence tomography (FF-OCT) is introduced. An en-face information of a sample can be demodulated from only two...