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Journal articles on the topic 'Spectra decomposition'

Author: Grafiati

Published: 4 June 2021

Last updated: 7 February 2022

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1

Coops, Nicholas, Stephen Dury, Marie-Louise Smith, Mary Martin, and Scott Ollinger. "Comparison of green leaf eucalypt spectra using spectral decomposition." Australian Journal of Botany 50, no. 5 (2002): 567. http://dx.doi.org/10.1071/bt01082.

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Vegetation function and dynamics are key parameters in terrestrial carbon-cycle models. The strong linkages between biochemical constituents in foliage with photosynthetic capacity and ecosystem productivity makes the development of methods to characterise patterns of foliage biochemistry a potentially powerful approach for estimating leaf function and carbon fluxes at a variety of scales. Eucalypt foliage spectra were obtained over a range of species and locations in southern New South Wales, covering a significant productivity and climatic gradient. We applied a spectral decomposition techni

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2

Ferreira, Marcia M. C., Mary Lou Brandes, Inês M. C. Ferreira, et al. "Chemometric Study of the Fluorescence of Dental Calculus by Trilinear Decomposition." Applied Spectroscopy 49, no. 9 (1995): 1317–25. http://dx.doi.org/10.1366/0003702953965173.

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Chemometric techniques have been applied to the unresolved second-order porphyrinic emission-excitation fluorescent spectra of several animal dental calculus deposits dissolved in HCl. A singular value decomposition (SVD) procedure was used for preliminary indication of the number of fluorescent species present in the samples. The trilinear decomposition (TLD) method was applied to resolve component spectra, resulting in three porphyrinic spectral profiles for both canines and felines.

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Falkowski, Bogdan J., and Sudha Kannurao. "Identification of Disjoint Bi-decompositions in Boolean Functions through Walsh Spectrum." VLSI Design 14, no. 3 (2002): 307–13. http://dx.doi.org/10.1080/10655140290011104.

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A new algorithm for the identification of disjoint bi-decomposition in Boolean functions from its Walsh spectrum is proposed. The type of bi-decomposition and its existence is derived from the knowledge of a subset of Walsh spectrum for a Boolean function. All three types of bi-decomposition are considered including OR, AND and EXOR type. A filtering procedure that uses just few Walsh spectral coefficients (SC) is applied to quickly eliminate the functions that are not bi-decomposable and hence the algorithm is very efficient. The type of bi-decomposition and affirmation/negation of variables

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4

Поздняков, А. О. "Кинетика изменений спектров термодеструкции композита полибутилметакрилат-фуллерен C-=SUB=-60-=/SUB=- при ультрафиолетовом облучении". Письма в журнал технической физики 45, № 10 (2019): 49. http://dx.doi.org/10.21883/pjtf.2019.10.47758.17606.

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By using thermal decomposition mass-spectra the kinetics of ultraviolet induced transformation of polybutylmethacrylate has been described. The enhancement of decomposition at low temperatures occurs after low irradiation doses. Further growth of irradiation dose results in the decrease of the total amount of the monomer formed upon thermal decomposition. In the case of the polybutylmethacrylate-fullerene C60 composite the changes of the spectra are observed in the same range of irradiation doses, however, the spectral shapes and intensities exhibit different response to irradiation compared t

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Kowalski, N., D. A. Depireux, and S. A. Shamma. "Analysis of dynamic spectra in ferret primary auditory cortex. II. Prediction of unit responses to arbitrary dynamic spectra." Journal of Neurophysiology 76, no. 5 (1996): 3524–34. http://dx.doi.org/10.1152/jn.1996.76.5.3524.

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1. Responses of single units and multiunit clusters were recorded in the ferret primary auditory cortex (AI) with the use of broadband complex dynamic spectra. Previous work has demonstrated that simpler spectra consisting of single moving ripples (i.e., sinusoidally modulated spectral profiles that travel at a constant velocity along the logarithmic frequency axis) could be used effectively to characterize the response fields and transfer functions of AI cells. 2. A complex dynamic spectral profile can be thought of as being the sum of moving ripple spectra. Such a decomposition can be comput

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6

Dzyubenko, M. I., D. F. Kulishenko, A. A. Priyomko, and S. N. Kolpakov. "DECOMPOSITION OF LASER-INDUCED EMISSION SPECTRA." Telecommunications and Radio Engineering 70, no. 20 (2011): 1883–90. http://dx.doi.org/10.1615/telecomradeng.v70.i20.80.

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7

Possokhov, Yu M., V. I. Butakova, and V. K. Popov. "Decomposition of IR spectra of coal." Coke and Chemistry 58, no. 2 (2015): 49–57. http://dx.doi.org/10.3103/s1068364x15020052.

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8

Kruseman, A. C., H. Schut, Masanori Fujinami, and A. van Veen. "Decomposition of Doppler Broadened Annihilation Spectra." Materials Science Forum 255-257 (September 1997): 793–95. http://dx.doi.org/10.4028/www.scientific.net/msf.255-257.793.

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9

Vershinin, V. V. "ON THE DECOMPOSITION OF CERTAIN SPECTRA." Mathematics of the USSR-Sbornik 60, no. 2 (1988): 283–90. http://dx.doi.org/10.1070/sm1988v060n02abeh003168.

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10

Shinkarenko, V. K., E. V. Shinkarenko, and V. P. Shcherbatskii. "Decomposition of spectra into voigt-contours." Journal of Applied Spectroscopy 62, no. 1 (1995): 46–48. http://dx.doi.org/10.1007/bf02606563.

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11

Cvetković, Miloš D., and Snežana Č. Živković-Zlatanović. "Generalized Kato Decomposition and Essential Spectra." Complex Analysis and Operator Theory 11, no. 6 (2016): 1425–49. http://dx.doi.org/10.1007/s11785-016-0626-4.

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12

Cho, Yang-Jin, So-Yoen Kim, Mi Rang Son, Ho-Jin Son, Dae Won Cho, and Sang Ook Kang. "Time-resolved spectroscopic analysis of the light-energy harvesting mechanism in carbazole-dendrimers with a blue-phosphorescent Ir-complex core." Physical Chemistry Chemical Physics 19, no. 30 (2017): 20093–100. http://dx.doi.org/10.1039/c7cp01989k.

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13

Ye, Huping, Bing Zhang, Xiaohan Liao, et al. "Gaussian decomposition and component pigment spectral analysis of phytoplankton absorption spectra." Journal of Oceanology and Limnology 37, no. 5 (2019): 1542–54. http://dx.doi.org/10.1007/s00343-019-8079-z.

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14

Antoniou, I., and S. A. Shkarin. "Decay spectrum and decay subspace of normal operators." Proceedings of the Royal Society of Edinburgh: Section A Mathematics 131, no. 6 (2001): 1245–55. http://dx.doi.org/10.1017/s0308210500001372.

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Let A be a self-adjoint operator on a Hilbert space. It is well known that A admits a unique decomposition into a direct sum of three self-adjoint operators Ap, Aac and Asc such that there exists an orthonormal basis of eigenvectors for the operator Ap, the operator Aac has purely absolutely continuous spectrum and the operator Asc has purely singular continuous spectrum. We show the existence of a natural further decomposition of the singular continuous component Asc into a direct sum of two self-adjoint operators and . The corresponding subspaces and spectra are called decaying and purely no

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15

Jin, Yuqi, Yurii Zubov, Teng Yang, Tae-Youl Choi, Arkadii Krokhin, and Arup Neogi. "Spatial Decomposition of a Broadband Pulse Caused by Strong Frequency Dispersion of Sound in Acoustic Metamaterial Superlattice." Materials 14, no. 1 (2020): 125. http://dx.doi.org/10.3390/ma14010125.

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An acoustic metamaterial superlattice is used for the spatial and spectral deconvolution of a broadband acoustic pulse into narrowband signals with different central frequencies. The operating frequency range is located on the second transmission band of the superlattice. The decomposition of the broadband pulse was achieved by the frequency-dependent refraction angle in the superlattice. The refracted angle within the acoustic superlattice was larger at higher operating frequency and verified by numerical calculated and experimental mapped sound fields between the layers. The spatial dispersi

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Al-Awadi, Nouria A., Nadia M. Shuaib, Alaa Abbas, Ahmed A. El-Sherif, Ali El-Dissouky, and Esmaeil Al-Saleh. "Synthesis, Characterization, and Biological Activity ofN1-Methyl-2-(1H-1,2,3-Benzotriazol-1-y1)-3-Oxobutan-ethioamide Complexes with Some Divalent Metal (II) Ions." Bioinorganic Chemistry and Applications 2008 (2008): 1–10. http://dx.doi.org/10.1155/2008/479897.

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A new series ofZn2+,Cu2+,Ni2+, andCo2+complexes ofN1-methyl-2-(1H-1,2,3-benzotriazol-1-yl)-3-oxobutanethioamide (MBOBT), HL, has been synthesized and characterized by different spectral and magnetic measurements and elemental analysis. IR spectral data indicates that (MBOBT) exists only in the thione form in the solid state while 13CNMR spectrum indicates its existence in thione and thiole tautomeric forms. The IR spectra of all complexes indicate that (MBOBT) acts as a monobasic bidentate ligand coordinating to the metal(II) ions via the keto-oxygen and thiolato-sulphur atoms. The electronic

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17

Tsurui, Hiromichi, Hiroyuki Nishimura, Susumu Hattori, Sachiko Hirose, Ko Okumura, and Toshikazu Shirai. "Seven-color Fluorescence Imaging of Tissue Samples Based on Fourier Spectroscopy and Singular Value Decomposition." Journal of Histochemistry & Cytochemistry 48, no. 5 (2000): 653–62. http://dx.doi.org/10.1177/002215540004800509.

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SUMMARY Seven-color analyses of immunofluorescence-stained tissue samples were accomplished using Fourier spectroscopy-based hyperspectral imaging and singular value decomposition. This system consists of a combination of seven fluorescent dyes, three filter-sets, an epifluorescence microscope, a spectral imaging system, a computer for data acquisition, and data analysis software. The spectra of all pixels in a multicolor image were taken simultaneously using a Sagnac type interferometer. The spectra were deconvolved to estimate the contribution of each component dye, and individual dye images

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18

Hruška, Branislav, Rajesh Dagupati, Mária Chromčíková, et al. "Structure and Raman spectra of binary barium phosphate glasses." Journal of Thermal Analysis and Calorimetry 142, no. 2 (2020): 937–42. http://dx.doi.org/10.1007/s10973-020-09328-0.

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Abstract The structure of xBaO·(1 − x) P2O5 (x = 0.30, 0.35, 0.40, 0.45, and 0.50) glasses was studied by Raman spectroscopy and thermodynamic model Shakhmatkin and Vedishcheva (SVTDM). The seven system components (defined as stable crystalline phases of the BaO–P2O5 binary phase diagram) were considered in the SVTDM: BaO, P2O5, 4BaO·P2O5 (B4P), 3BaO·P2O5 (B3P), 2BaO·P2O5 (B2P), BaO·P2O5 (BP), and BaO·2 P2O5 (BP2). Only the equilibrium molar abundances of BP and BP2 were non-negligible in all studied glass compositions. Therefore, in the next step, multivariate curve analysis (MCR) of the base

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19

Fredriksson, Jonas, Wolfgang Bermel, and Martin Billeter. "Complete protein assignment from sets of spectra recorded overnight." Journal of Biomolecular NMR 73, no. 1-2 (2019): 59–70. http://dx.doi.org/10.1007/s10858-019-00226-8.

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Abstract A flexible and scalable approach for protein NMR is introduced that builds on rapid data collection via projection spectroscopy and analysis of the spectral input data via joint decomposition. Input data may originate from various types of spectra, depending on the ultimate goal: these may result from experiments based on triple-resonance pulse sequences, or on TOCSY or NOESY sequences, or mixtures thereof. Flexible refers to the free choice of spectra for the joint decompositions depending on the purpose: assignments, structure, dynamics, interactions. Scalable means that the approac

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20

Remond, G., R. Myklebust, M. Fialin, C. Nockolds, M. Phillips, and C. Roques-Carmes. "Decomposition of wavelength dispersive x-ray spectra." Journal of Research of the National Institute of Standards and Technology 107, no. 6 (2002): 509. http://dx.doi.org/10.6028/jres.107.044.

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21

Chase, Alison, Emmanuel Boss, Ronald Zaneveld, et al. "Decomposition of in situ particulate absorption spectra." Methods in Oceanography 7 (September 2013): 110–24. http://dx.doi.org/10.1016/j.mio.2014.02.002.

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22

Song, Yong-Seon, and Issha Kayo. "Decomposition of spectra from redshift distortion maps." Monthly Notices of the Royal Astronomical Society 407, no. 2 (2010): 1123–27. http://dx.doi.org/10.1111/j.1365-2966.2010.16955.x.

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23

Hiller, Sebastian, Ilghis Ibraghimov, Gerhard Wagner, and Vladislav Y. Orekhov. "Coupled Decomposition of Four-Dimensional NOESY Spectra." Journal of the American Chemical Society 131, no. 36 (2009): 12970–78. http://dx.doi.org/10.1021/ja902012x.

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24

v. Toussaint, U., V. Dose, and A. Golan. "Maximum entropy decomposition of quadrupole mass spectra." Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films 22, no. 2 (2004): 401–6. http://dx.doi.org/10.1116/1.1649345.

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25

Zhang, Kai, Yujun Zhang, Kun You, et al. "Study on the Noise Reduction of Vehicle Exhaust NOX Spectra Based on Adaptive EEMD Algorithm." Journal of Spectroscopy 2017 (2017): 1–7. http://dx.doi.org/10.1155/2017/3290420.

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It becomes a key technology to measure the concentration of the vehicle exhaust components with the transmission spectra. But in the conventional methods for noise reduction and baseline correction, such as wavelet transform, derivative, interpolation, polynomial fitting, and so forth, the basic functions of these algorithms, the number of decomposition layers, and the way to reconstruct the signal have to be adjusted according to the characteristics of different components in the transmission spectra. The parameter settings of the algorithms above are not transcendental, so with them, it is d

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26

Никитов, Илья, Ilya Nikitov, Иван Мельник, et al. "SIMULATION OF NONLINEAR CIRCUITS BY SPECTRAL BALANCE METHOD USING TENSORS." Automation and modeling in design and management of 2019, no. 2 (2019): 4–10. http://dx.doi.org/10.30987/article_5cf2d111d2d487.29167772.

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The purpose of the article is to present the new method for electronic circuits simulation in frequency domain. The paper consists of an introduction, five sections, a conclusion and list of references.  The first section is considered with the current state of the spectral balance method, which is a special versions of traditional harmonic balance method. In this method the linear and nonlinear parts of circuits are modeled in frequency domain only. The second section is devoted to the development of a spectra calculation method in nonlinear elements. The nonlinear elements into c

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27

Wheeler, Jeffrey L., McKinley Pugh, S. Jake Atkins, and Jason M. Porter. "Thermal Breakdown Kinetics of 1-Ethyl-3-Methylimidazolium Ethylsulfate Measured Using Quantitative Infrared Spectroscopy." Applied Spectroscopy 71, no. 12 (2017): 2626–31. http://dx.doi.org/10.1177/0003702817727293.

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In this work, the thermal stability of the room temperature ionic liquid (RTIL) 1-ethyl-3-methylimidazolium ethylsulfate ([EMIM][EtSO4]) is investigated using infrared (IR) spectroscopy. Quantitative IR absorption spectral data are measured for heated [EMIM][EtSO4]. Spectra have been collected between 25 ℃ and 100 ℃ using a heated optical cell. Multiple samples and cell pathlengths are used to determine quantitative values for the molar absorptivity of [EMIM][EtSO4]. These results are compared to previous computational models of the ion pair. These quantitative spectra are used to measure the

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28

Mendez, M. A., M. Balabane, and J. M. Buchlin. "Multi-scale proper orthogonal decomposition of complex fluid flows." Journal of Fluid Mechanics 870 (May 15, 2019): 988–1036. http://dx.doi.org/10.1017/jfm.2019.212.

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Data-driven decompositions are becoming essential tools in fluid dynamics, allowing for tracking the evolution of coherent patterns in large datasets, and for constructing low-order models of complex phenomena. In this work, we analyse the main limits of two popular decompositions, namely the proper orthogonal decomposition (POD) and the dynamic mode decomposition (DMD), and we propose a novel decomposition which allows for enhanced feature detection capabilities. This novel decomposition is referred to as multi-scale proper orthogonal decomposition (mPOD) and combines multi-resolution analysi

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Volkov, Vladimir V. "Separation of Additive Mixture Spectra by a Self-Modeling Method." Applied Spectroscopy 50, no. 3 (1996): 320–26. http://dx.doi.org/10.1366/0003702963906357.

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A method for the separation of additive spectra of complex mixtures is developed on the basis of a linear algebra technique and nonlinear optimization algorithms. It is shown to be possible, under certain conditions, to uniquely separate a set of complex spectral curves consisting of the same components, but with different proportions, into the unknown spectra of the pure constituents and to give their respective relative concentrations. The method proposed is a variant of the self-modeling curve-resolution approach based on the singular value decomposition of the data matrix formed by the set

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Sepman, A. V., R. den Blanken, R. Schepers, and L. P. H. de Goey. "Quantitative Fourier Transform Infrared Diagnostics of the Gas-Phase Composition Using the HITRAN Database and the Equivalent Width of the Spectral Features." Applied Spectroscopy 63, no. 11 (2009): 1211–22. http://dx.doi.org/10.1366/000370209789806948.

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This paper presents a strategy for quantification of medium resolution Fourier transform infrared (FT-IR) spectra. The approach is based on a comparison of the values of the equivalent width of spectral features determined from the measured FT-IR spectra with those calculated from corresponding molecular spectra simulated using spectroscopic parameters tabulated in the HITRAN database. Although the equivalent-width method is routinely applied in many high-resolution experiments, its potential is often ignored when the spectral resolution of the measurements is bigger than the width of the stud

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31

Ilchenko, Oleksii O., Andrii M. Kutsyk, and Vyacheslav V. Obukhovsky. "Study of Complexation in Acetone-Chloroform Mixtures by Infrared Spectroscopy." Journal of Atomic and Molecular Physics 2014 (February 24, 2014): 1–6. http://dx.doi.org/10.1155/2014/106178.

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FTIR spectra of acetone-chloroform system with various component ratios were investigated within the spectral range 3950–4550 cm−1. Methods of multivariate curve resolution were applied to decompose the FTIR spectra into specific components of different composition. A method of decomposition based on structural model of solution which contains acetone, chloroform, and complex acetone/chloroform (1 : 1) was proposed. Results of both approaches are in good agreement within the range of measuring error.

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Bondarenco, M. V. "Separation of edge effects in highly non-dipole radiation spectra." Modern Physics Letters A 33, no. 07n08 (2018): 1850035. http://dx.doi.org/10.1142/s0217732318500359.

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Edge effects in spectra of non-dipole radiation from ultra-relativistic electrons passing through various finite targets are analyzed from a unified point of view. Examples include radiation in a finite magnet, bremsstrahlung at double scattering, and bremsstrahlung in an amorphous plate. A generalization of the encountered spectral decomposition property is proposed. The relevance of phenomena of jet–inter-jet radiation interference and electron time delay in the target is emphasized. Features produced by them in the radiation spectra are discussed.

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Pomerleau-Dalcourt, Natalie, Robert Weersink, and Lothar Lilge. "Partial Least Squares Based Decomposition of Five Spectrally Overlapping Factors." Applied Spectroscopy 59, no. 11 (2005): 1406–14. http://dx.doi.org/10.1366/000370205774783124.

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The development of a multi-sensory fiber-optic based fluence rate probe (MSP) for light monitoring and dosimetry during photodynamic therapy (PDT) created the need for a robust multivariate signal analysis algorithm capable of quantifying the intensity of five component spectra, representing the sensors, which display a large degree of spectral overlap. Partial least squares (PLS) analysis, as an option for such an analysis algorithm, was evaluated through simulations in the presence of three types of noise, which experimentally may limit the accuracy of PLS quantification of component spectra

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34

Gehne, Maria, and Richard Kleeman. "Spectral Analysis of Tropical Atmospheric Dynamical Variables Using a Linear Shallow-Water Modal Decomposition." Journal of the Atmospheric Sciences 69, no. 7 (2012): 2300–2316. http://dx.doi.org/10.1175/jas-d-10-05008.1.

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Abstract Space–time spectral analysis has been used frequently in studying observational evidence of convectively coupled equatorial waves. Here 23 yr of brightness temperature Tb data and dynamical reanalysis data are analyzed by an appropriate projection onto the meridional basis functions of the β-plane linear shallow-water equations. Evidence of peaks in power along linear equatorial mode dispersion curves in Tb, zonal and meridional wind, divergence, and geopotential spectra are presented. Another feature of all space–time spectra considered is the redness in frequency, zonal wavenumber,

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Battermanc, Stuart. "The Use of Singular Value Variance-Decomposition Proportions in FT-IR Analysis of Gases and Vapors." Applied Spectroscopy 46, no. 5 (1992): 800–806. http://dx.doi.org/10.1366/0003702924124745.

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Issues in the application of spectral least-squares methods to Fourier transform infrared spectrophotometry are discussed with emphasis on collinearity problems in vapor and gas reference spectra. Excessive collinearity may degrade the accuracy and reliability of prediction. Several methods that detect and diagnose collinearity are developed and tested with the use of numerical experiments. The condition number is based on the singular values in the reference spectra matrix and provides a stable and composite measure of collinearity. Variance-decomposition proportions and auxiliary regressions

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Ilchenko, O. O., Y. V. Pilgun, A. S. Reynt, and A. M. Kutsyk. "NNLS and MCR-ALS Decomposition of Raman and FTIR Spectra of Multicomponent Liquid Solutions." Ukrainian Journal of Physics 61, no. 6 (2016): 519–22. http://dx.doi.org/10.15407/ujpe61.06.0519.

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Cambois, Guillaume, and Paul Stoffa. "Surface‐consistent phase decomposition in the log/Fourier domain." GEOPHYSICS 58, no. 8 (1993): 1099–111. http://dx.doi.org/10.1190/1.1443494.

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In the log/Fourier domain, decomposing the amplitude spectra of seismic data into surface‐consistent terms is a linear problem that can be solved, very efficiently, one frequency at a time. However, the nonunique definition of the complex logarithm makes it much more difficult to decompose the phase spectra. The instability of phase unwrapping has previously prevented any attempt to decompose phase spectra in the log/Fourier domain. We develop a fast and robust partial unwrapping algorithm, which makes it possible to efficiently decompose the phase spectra of normal moveout‐corrected (NMO‐) da

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Makhniy, Victor, Oksana Kinzerska, and Illia Senko. "ANALYSIS OF THE SEPARATION METHODS OF OPTICAL SPECTRA FOR INDIVIDUAL COMPONENTS." Informatyka Automatyka Pomiary w Gospodarce i Ochronie Środowiska 8, no. 4 (2018): 8–11. http://dx.doi.org/10.5604/01.3001.0012.7982.

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A comparative analysis of various methods for the decomposition of broad bands into individual components has been carried out. It is shown that the most universal are the methods of modulation spectroscopy and direct differentiation of conventional spectral characteristics, which, unlike the widely used Alentsev-Fock method, are applicable to spectra of any type (luminescence, transmission, absorption, etc.). The features and capabilities of the direct differentiation method are used to identify the structure in the emission spectra and transmission of ZnSe <Al> single-crystal substrate

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Burstein, Edward A., Sergei M. Abornev, and Yana K. Reshetnyak. "Decomposition of Protein Tryptophan Fluorescence Spectra into Log-Normal Components. I. Decomposition Algorithms." Biophysical Journal 81, no. 3 (2001): 1699–709. http://dx.doi.org/10.1016/s0006-3495(01)75823-7.

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Zackrisson, M. "Decomposition of Blended Lines in Velocity-Modulated Spectra." Applied Spectroscopy 46, no. 5 (1992): 880–82. http://dx.doi.org/10.1366/0003702924124718.

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Shimasaki, Choichiro, Yoshinori Mutou, Eiichi Tsukurimichi, and Toshiaki Yoshimura. "Thermal Decomposition and Mass Spectra of Phosphoramidate Esters." Bulletin of the Chemical Society of Japan 63, no. 2 (1990): 370–77. http://dx.doi.org/10.1246/bcsj.63.370.

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Chvetsov, Alexei V., and George A. Sandison. "Reconstruction of electron spectra using singular component decomposition." Medical Physics 29, no. 4 (2002): 578–91. http://dx.doi.org/10.1118/1.1461840.

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43

Čížek, J. "PLRF Code for Decomposition of Positron Lifetime Spectra." Acta Physica Polonica A 137, no. 2 (2020): 177–87. http://dx.doi.org/10.12693/aphyspola.137.177.

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Slonimskaya, M. V., G. Besson, L. G. Dainyak, C. Tchoubar, and V. A. Drits. "Interpretation of the IR spectra of celadonites and glauconites in the region of OH-stretching frequencies." Clay Minerals 21, no. 3 (1986): 377–88. http://dx.doi.org/10.1180/claymin.1986.021.3.09.

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AbstractA method is given for quantitative analysis of IR spectra of dioctahedral micas in the OH-stretching region, which involves spectral decomposition and correlation of octahedral cation contents with integrated optical densities of the corresponding bands. It provides a basis for the study of order-disorder in these minerals and has allowed revision of the crystallochemical formulae of some glauconites and celadonites.

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Wedlake, Michael D., and Paul A. Kohl. "Thermal Decomposition Kinetics of Functionalized Polynorbornene." Journal of Materials Research 17, no. 3 (2002): 632–40. http://dx.doi.org/10.1557/jmr.2002.0090.

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The mechanism and kinetic parameters for the thermal decomposition of four functionalized addition-polymerized polynorbornenes were studied by dynamic and isothermal thermogravimetric analyses and by mass spectrometry. The dynamic and isothermal thermogravimetric analyses showed a first-order degradation reaction mechanism with an activation energy of 229.6 ± 12.5 kJ/mol. Based on the polymer structure, reference mass spectra for related molecules, and a cross-comparison of the mass spectra, the backbone, free-radical scission mechanism was found to occur by cleavage of the linkages between bi

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Chau, F. T., T. M. Shih, J. B. Gao, and C. K. Chan. "Application of the Fast Wavelet Transform Method to Compress Ultraviolet-Visible Spectra." Applied Spectroscopy 50, no. 3 (1996): 339–48. http://dx.doi.org/10.1366/0003702963906320.

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Data compression methods based on the fast wavelet transform and the multiresolution signal decomposition algorithms were devised and applied to ultraviolet-visible absorption spectra. Wavelet functions of the Daubechies type were employed for the purpose. In addition, two data pretreatment procedures were proposed and used to cope with the side-lobe problem. The performance of these methods was evaluated by using both synthetic and experimental data. It was found that the storage space of the spectral information under study can be reduced significantly by using the suggested methods with goo

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Manimekalai, R., C. R. Sinduja, and K. Kalpanadevi. "Preparation, Analytical, IR Spectral, and Thermal Studies of Some New Hydrazinium Carboxylates." International Journal of Inorganic Chemistry 2012 (November 5, 2012): 1–5. http://dx.doi.org/10.1155/2012/624374.

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Hydrazinium salts of 2,4-dichlorophenylacetic acid, phenoxyacetic acid, 2,4-dichlorophenoxyacetic acid, diphenylacetic acid, cinnamic acid, and picolinic and nicotinic acids have been prepared by accomplishing neutralization of aqueous hydrazine hydrate with the respective acids. Formation of these hydrazinium salts has been confirmed by analytical, IR spectral, and thermal studies. IR spectra of the salts register N–N stretching frequencies of ion in the region 963–951 cm−1 and the frequencies of ion in the region 1047–1026 cm−1. Thermal decomposition studies show that the hydrazinium salts u

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Lu Qizhen, 陆祈祯, 丁朋 Ding Peng, and 黄俊斌 Huang Junbin. "Peak Detection of Fiber Bragg Grating Spectra Using Even-Odd Function for Spectral Decomposition." Chinese Journal of Lasers 47, no. 3 (2020): 0304009. http://dx.doi.org/10.3788/cjl202047.0304009.

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BAGHERI, ABDOLLAH, AMIR A. FATEMI, and GHOLAMREZA GHODRATI AMIRI. "SIMULATION OF EARTHQUAKE RECORDS BY MEANS OF EMPIRICAL MODE DECOMPOSITION AND HILBERT SPECTRAL ANALYSIS." Journal of Earthquake and Tsunami 08, no. 01 (2014): 1450002. http://dx.doi.org/10.1142/s179343111450002x.

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One of the most important problems in the design of earthquake resistance structures at sites with no strong ground motion data is the generation and simulation of earthquake records. In this paper, an effective method based on Hilbert–Huang transform for the simulation of earthquake time histories is presented. The Hilbert–Huang transform consists of the empirical mode decomposition and Hilbert spectral analysis. Earthquake time histories decompose via empirical mode decomposition to obtain the intrinsic mode functions of earthquake time history. Any of intrinsic mode functions is simulated b

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Cheng, Xiuli, Ying Li, Zhengxia Chen, and Tongshun Shi. "Synthesis and physical properties of the succinyloxyl-bridged meso-tetraphenylporphyrin dimer." Journal of Porphyrins and Phthalocyanines 11, no. 01 (2007): 9–14. http://dx.doi.org/10.1142/s1088424607000035.

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A new succinyloxyl-bridged porphyrin dimer has been synthesized and characterized by UV-vis, IR, 1 H NMR spectra and mass spectra. The photovoltaic properties and charge-transfer process have been investigated by surface photovoltage spectroscopy and electric-field-induced surface photovoltage spectroscopy techniques, which reveal that the compound is a P-type semiconductor. The spectral bands correspond to the π → π* transition. Its fluorescent properties have been studied using emission spectra. The quantum yield of the S 1 → S 0 fluorescence was 0.04 at room temperature. The electrochemical

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