Results 261 to 270 of about 7,706,107 (291)
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Spectral line identification of Comet Halley in March–April 1986
Chinese Astronomy and Astrophysics, 1990Abstract In March–April 1986 when Comet Halley was between 1 and 1.5 AU fron the Sun, we used the 1-metre telescope of Yunnan Observatory and obtained 7 long-slit spectra at a dispersion of 165 A/mm and with a resolution better than 7 A. The results of line identification on 6 of the plates between 3000–5100 A are given here.
Wu Guang-jie +3 more
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Spectral Line Identification Studies of Some Stars with Helium Anomalies
Canadian Journal of Physics, 1975Spectral line identification studies have been carried out at 12 Å/mm for four peculiar helium stars in the Orion Belt Region and two standard stars. HD 36 526, HD 37 140, HD 37 321, and HD 37 479 (σ Orionis E) are compared with the sharp lined MK standards, ν Ononis (B3 V) and γ Lyrae (B9 III).
Bruce Campbell, R. F. Garrison
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Improving identification of weak spectral lines in the presence of a strong continuum
Astrophysics and Space Science, 2016Observing faint spectral signals from light sources in the presence of an overwhelming background is a common goal in many aspects of physics and astronomy. By using an optimized selected part of a Fourier interferogram, we demonstrate that observability of such faint signals can be much improved.
Eyal Schwartz +2 more
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Journal of Neuro-Oncology, 2001
To elucidate the reasons why mRNA expression of the LGI1 candidate tumor-suppressor gene was severely reduced in the glioma-derived cell line H4, as demonstrated in a previous study, we performed a cytogenetic analysis of this cell line using conventional methods and fluorescence in situ hybridization (FISH) techniques [spectral karyotyping (SKY ...
D, Krex +5 more
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To elucidate the reasons why mRNA expression of the LGI1 candidate tumor-suppressor gene was severely reduced in the glioma-derived cell line H4, as demonstrated in a previous study, we performed a cytogenetic analysis of this cell line using conventional methods and fluorescence in situ hybridization (FISH) techniques [spectral karyotyping (SKY ...
D, Krex +5 more
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A study of spectral line identifications in perseid meteor spectra
1961A detailed lisl of spectral line idenlifirations is derived from the study of five Perseid meteor spectra. A total of 229 features are identified in the region from 3680 A to 8710 A. lt is shown that lines of N II, O II, and Sr II are present, and probably also lines of Sr I, Ba I, and Ba II, in addition to lines of other atoms and ions previously ...
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Speaker Identification and Verification Using Line Spectral Frequencies
2015Master of ...
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Atomic structure calculations and identification of EUV and SXR spectral lines in Sr XXX
Journal of Quantitative Spectroscopy and Radiative Transfer, 2015Abstract We report an extensive theoretical study of atomic data for Sr XXX in a wide range with L-shell electron excitations to the M-shell. We have calculated energy levels, wave-function compositions and lifetimes for lowest 113 fine structure levels and wavelengths of an extreme Ultraviolet (EUV) and soft X-ray (SXR) transitions. We have employed
Arun Goyal +4 more
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Spectral line shape identification with continuous wavelet transform
2006A lot of methods that allow analyzing of complex contours are known. In the case of the analytical type of the peak is known the least squares method is usually used. Nevertheless, if the noise level is high enough, LSM method can't be used because of the large distortions of the results.
Galimullin D. +5 more
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Journal of Chromatographic Science, 1979
It was found that the less intense ion peaks of the mass spectra of lower terpenes can play an important role in distinguishing compounds that have similar mass spectra. Two computer programs were developed that generate, from combined gas chromatographic—mass spectra data, F-1 weights (ANOVA) of mass ion peaks between 41 and 300.
Adams, R.P. +3 more
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It was found that the less intense ion peaks of the mass spectra of lower terpenes can play an important role in distinguishing compounds that have similar mass spectra. Two computer programs were developed that generate, from combined gas chromatographic—mass spectra data, F-1 weights (ANOVA) of mass ion peaks between 41 and 300.
Adams, R.P. +3 more
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International Journal of Biometrics, 2010
Conventional Speaker Identification (SI) systems utilise spectral features like Mel-Frequency Cepstral Coefficients (MFCC) or Perceptual Linear Prediction (PLP) as a frontend module. Line Spectral pairs Frequencies (LSF) are popular alternative representation of Linear Prediction Coefficients (LPC).
Md. Sahidullah +2 more
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Conventional Speaker Identification (SI) systems utilise spectral features like Mel-Frequency Cepstral Coefficients (MFCC) or Perceptual Linear Prediction (PLP) as a frontend module. Line Spectral pairs Frequencies (LSF) are popular alternative representation of Linear Prediction Coefficients (LPC).
Md. Sahidullah +2 more
openaire +1 more source