Review and results of studies of the harmonic composition of the current consumed by low-power frequency converters, as well as methods and devices to reduce their negative impact... by S. S. Kostinskiy

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METHODS AND MEANS OF ANALYTIC CONTROL IN METALLURGY PRODUCTION by M. N. Kovalenko, V. A. Chekan, L. V. Markova, V. V. Koleda

“…On the basis of long-term working experience of testing Centre there are given recommendations to the works laboratories on using of spectral methods on definition of elementary composition of different classes materials.…”
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Receiving and research of thin films of graphite and oxide of aluminium as bases for high capacitance capacitors by K.M. Makhanov, K.T. Ermaganbetov, L.V. Chirkova, A.K. Zeinidenov, E.T. Arinova

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Free- and Forced-Vibration Characteristic Analysis of a Double-Layered Cylindrical Shell with General Boundary Conditions by Jianghai Wu, Hongzhen Zhu, Yong Duan

“…This study develops a spectral element method (SEM) for dynamic modeling of multi-component shell systems by extending the vibrational governing equations of conical shells. …”
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Statistics on Differences in the Institutional Composition of the National Economy and Issues Related to its Harmonization by O. V. Morozov, A. G. Biryukov, M. A. Vasiliev

“…At the same time, it is obvious that the ratio between the public and other (non-state) sectors refers to the issue of strategic importance, to the issue of the effectiveness of the country's economic system in its integrity, and therefore requires theoretical, methodological and practical resolution.The objectives of the research are: (1) to determine the relative scale and efficiency of the public sector functioning in the national economy, to establish minimum necessary and maximum possible values of its scale; (2) to determine the size and establish a measure of harmonious combination of institutional components of the domestic economy aimed at maximizing its efficiency.Materials and methods. Theoretical foundations of the research have been developed on the basis of the authors' preferences regarding the results of conceptual and applied developments of domestic scientists in the field of philosophy, mathematics, economics and sociology, as well as the practice of structural and spectral analysis in their subject areas. …”
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Statistical data analysis methods in Brillouin spectroscopy: Tutorial by Christopher G. Poulton, Hadi Mahmodi, Matthew D. Arnold, Luke McAlary, Lezanne Ooi, Irina Kabakova

“…The main advantage of both methods is their unsupervised nature, thus no preliminary knowledge of structure and composition is needed to isolate the components of interest. …”
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Validation of chromatographic method for impurity profiling of Baloxavir marboxil (Xofluza) by Wang Yiyun, Wang Zhiping, Wu Hui, Meng Zihui, Zheng Zhonghui, Li Jiarong

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The use of spectroscopic techniques and chemometric methods in milk technology by Bojan Matijević, Marijana Blažić

“…The qualitative and quantitative analyses of individual components in composite systems may be problematic due to overlaps in spectral responses. …”
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Application of impedance spectroscopy method for analysis of benzanol fuels by A. L. Kukla, A. V. Mamykin, A. S. Maistrenko, E. V. Polunkin, L. I. Starzhinska

“…The authors have developed a method for express control of three component «petrol – alcohol – water» fuel mixtures based on the spectral impedance investigation of benzanol mixture in the frequency range of 500 Hz – 10 kHz. …”
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Light source classification and colour change modelling for understanding and predicting pigments discolouration by Panagiotis Siozos, Letizia Monico, Aldo Romani, Costanza Miliani, Brenda Doherty, Irina Crina Anca Sandu, Hartmut Kutzke, Ingrid M T Flåte, Petros Stavroulakis, Sophia Sotiropoulou

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Comparative Characteristics of Sugar Determination by Different Methods in Leaves of Nettle by O. V. Trineeva

“…The obtained results of quantitative determination of the amount of free and bound simple sugars in the studied PRM are consistent with the determination data by the picrine pharmacopoeial method.Conclusion. In general, complete information, depending on the goals of the analysis, on the composition and quantitative content of simple and related sugars in the polysaccharide complex of plant objects can only be obtained by combining spectral methods with CE or TLC.…”
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Application of Satellite Image Processing Methods for Hydrocarbon Field Search by R. V. Fiodоrtsev, A. R. Silie Cuenca, D. A. Kozhevnikov, V. M. Medina, R. Delgado

“…The object of the study is software methods of the Earth surface images processing obtained from the VRSS-2 satellite to determine the spectral composition of the vegetation cover to detect the presence of carotenoids during prolonged exposure to hydrocarbons.The photosynthetic pigments of higher plants (chlorophylls, carotenoids and phytobiliproteins) were analyzed. …”
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Classification and spectrum optimization method of grease based on infrared spectrum by Xin Feng, Yanqiu Xia, Peiyuan Xie, Xiaohe Li

“…The results show that this machine learning method can effectively eliminate the interference fringes in the IR spectrum, and complete the feature selection and dimensionality reduction of the high-dimensional spectral data. …”
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Influence of the Level of Defective Insulation Resistance of Electrical Machine Windings on Parameters of no-Load Current by A. V. Isaev, Yu. V. Suhodolov, S. V. Sizikov, A. A. Lomtev, V. A. Lychkovsky

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Digital technology for spectral analysis of oscillation parameters by A. V. Gulaj, V. M. Zajcev

“…The objective of this work consists in creating a digital method for spectral analysis of vibration signals, the implementation of which would be possible with the use of smart devices. …”
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Insights from core/shell ZnCuInS/ZnS nanocrystals, type-II confinement, and implications for the design of safer industrial nanocrystals by Michał Zieliński, Agnieszka Gajewicz-Skretna

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Calibration of the Composition of Low-Alloy Steels by the Interval Partial Least Squares Using Low-Resolution Emission Spectra with Baseline Correction by M. V. Belkov, K. Y. Catsalap, M. A. Khodasevich, D. A. Korolko, A. V. Aseev

“…The multivariate partial least squares method was used to create the calibrations. Reducing the effect of redundancy of wideband emission spectra on the results of quantitative analysis was achieved by searching combination moving window containing one spectral variable more than the optimal number of latent variables for the wideband multivariate model. …”
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A low complexity dynamic subarray combination method for MIMO transmitter by Cui WANG, Peng PAN, Shuai ZHANG, Junrong YAN

“…For the mmWave MIMO system using a partially-connected structure,in order to improve the spectral efficiency,the antenna composition of each subarray will be dynamically adjusted according to the channel conditions.However,the optimal grouping of antennas requires exhaustive searching for all possible antenna combinations according to certain criteri,which leads to unacceptable complexity.In response to the problem,a low-complexity sub-array dynamic allocation method was proposed.The core was to introduce certain rules when grouping array elements,thereby significantly reducing the number of combinations and reducing the search range.Specifically,two low-complexity antenna combination algorithms were proposed.Firstly,considering the strong correlation between mmWave antennas,multiple adjacent antennas were virtualized as an array element,thereby reducing the search space.Secondly,by dividing all antennas into upper and lower half areas,the antenna combination based on partition was realized,and the search space was also reduced.Simulation results show that the proposed method can achieve a good trade-off between performance and complexity.…”
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Ipomoea batatas (L.) Lam. cultivation in the conditions of light culture in vitro and ex vitro by E. A. Kalashnikova, R. N. Kirakosyan, A. V. Gushchin, K. G. Abubakarov, N. N. Sleptsov, S. K. Temirbekova, A. P. Glinushkin, O. V. Meleshina, N. Ya. Rebouh, M. M. Tareeva

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Application of NMR Method to Assess the Efficiency of Enhanced Oil Recovery Measures by N. K. Dvoyashkin, D. L. Melnikova, D. S. Ivanov, A. S. Aleksandrov, V. D. Skirda, K. D. Shumatbayev, A. D. Kurbanov

“…The paper presents the results of nuclear magnetic resonance (NMR) study of oil samples taken from production wells from the fields of the Republic of Tatarstan before and after the application of one of the enhanced oil recovery (EOR) methods, namely, flow rejection technology based on injection of microgel compositions into injection wells. …”
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