Results 251 to 260 of about 23,232,762 (289)

Application of artificial neural network to quantitative analysis of Raman spectrum

SPIE Proceedings, 2006
By means of Artificial Neural Network and Back-Propagation algorithm, the multi-component of azo-dyes can be qualitatively and quantitatively analyzed simultaneously, though their Raman spectra are overlapped. This article designed a Back-Propagation algorithm network to analyze the multi-component of azo-dyes (Sudan I and Sudan III). In conclusion,
Chen Chen, Guoping Zhang, Gang Li
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The Raman spectrum of dibenzenechromium and a normal coordinate analysis of complexed benzene

Spectrochimica Acta Part A: Molecular Spectroscopy, 1971
Abstract The Raman spectrum of Cr(C6H6)2 was recorded by a Cary Laser Raman spectrometer. Using the data for nine benzene-metal-π-complexes, a normal coordinate analysis of ligand benzene was executed. The results show that the differences in the vibrational spectra of free and ligand benzene are mainly due to changes in the interaction valence force
Lothar Schäfer, J.F. Southern, S.J. Cyvin   +2 more
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Critical-point analysis of the two-phonon Raman spectrum of silicon

Journal of Physics and Chemistry of Solids, 1974
Abstract Two-phonon Raman spectrum of silicon has been measured in back-scattering configuration at room temperature using Argon ion laser. It reveals many critical points and consists mainly of two-phonon overtone states. The agreement between the calculated density of states from neutron diffraction data and the present Raman spectrum is excellent ...
K. Uchinokura, T. Sekine, E. Matsuura
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[Laser Raman spectrum analysis of carbendazim pesticide].

Guang pu xue yu guang pu fen xi = Guang pu, 2015
Raman signal of solid and liquid carbendazim pesticide was collected by laser Raman spectrometer. The acquired Raman spectrum signal of solid carbendazim was preprocessed by wavelet analysis method, and the optimal combination of wavelet denoising parameter was selected through mixed orthogonal test. The results showed that the best effect was got with
Xiao-bin, Wang, Rui-mei, Wu, Mu-hua, Liu, Lu-ling, Zhang, Lei, Lin, Lin-yuan, Yan   +5 more
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Raman spectrum and normal co-ordinate analysis of chromyl chloride

Spectrochimica Acta, 1959
Abstract The complete Raman spectrum of CrO 2 Cl 2 , obtained by excitation with helium radiations in the red and near infrared region of the spectrum, is reported. The nine fundamental modes of vibration of the molecule, belonging to the C 2υ point group, are Raman-active and have been assigned to the observed frequencies.
H. Stammreich, K. Kawai, Yara Tavares
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An analysis of the Raman spectrum of syndiotactic polypropylene. 1. Conformational defects

Polymer, 2001
Abstract Spectroscopic features in the Raman spectrum of both crystalline and amorphous syndiotactic polypropylenes are reported which characterize different chain conformations. A normal coordinate analysis was conducted to assist in identifying conformationally sensitive bands in the experimental spectra.
Hahn, T, Suen, W, Kang, S, Hsu, SL, Stidham, HD, Siedle, AR   +5 more
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Raman spectrum and factor group analysis of crystalline titanium tetrachloride

Journal of the Chemical Society D: Chemical Communications, 1971
The Raman spectrum of crystalline titanium tetrachloride has been obtained at ca. 77K, and a factor group analysis of the fundamentals is presented in terms of the known space group C2h5.
R. J. H. Clark, B. K. Hunter, C. J. Willis   +2 more
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[Detection and analysis of several kinds of oils with Raman spectrum].

Guang pu xue yu guang pu fen xi = Guang pu, 2015
Applying Raman spectrometry to detect several kinds of oils such as petrol, diesel oil, naphtha and KHF (aviation fuel hydro treating), the authors can explore the regular laws existing among these oils. The authors detected 150 cases of oils using Raman spectrometer developed by ourselves with 785 nm excitation wavelength miniature portable, and ...
Li-li, Bao, Xiao-hua, Qi, Xiao-fang, Zhang, Wen-feng, Teng, Ming-qiang, Zou, Feng, Liu, Cheng, Zhang   +6 more
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Harmonic and anharmonic analysis of the IR and Raman spectrum of macrocyclic dioxopolyamine

Journal of Molecular Structure, 2014
Abstract A detailed analysis of the vibrational spectra of 8,8a,9,10,11,12,12a,13-octahydrodibenzo[b,h][1,4,7,10] dioxadiazacyclododecine-7,14 (6H,15H)-dione has been conducted in harmonic and anharmonic approximation. B3LYP and B3LYP-D3 functionals and 6-31G(d), 6-31+G(d,p) and TZVP basis set were employed.
Yujiao Wang, Xiaomei Xie, Huijuan Lu, Feifei Chen, Huihong Liu, Wei Li   +5 more
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Time-Frequency Characteristic Analysis of Raman Spectrum Signal

2021 13th International Conference on Advanced Infocomm Technology (ICAIT), 2021
Ming Li, Zanyu Geng, Zhen Yang, Jiwen Chen   +3 more
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