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Journal articles on the topic 'SPECTRUM APPLICATIONS'

Author: Grafiati

Published: 11 September 2023

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1

Long, Junbo, Haibin Wang, and Peng Li. "Applications of Fractional Lower Order Frequency Spectrum Technologies to Bearing Fault Analysis." Mathematical Problems in Engineering 2019 (August 27, 2019): 1–24. http://dx.doi.org/10.1155/2019/7641383.

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The traditional spectral analysis method is used to study the characteristics of bearing fault signals in frequency domain, which is reasonable and effective in general cases. However, it is proved that the fault signals have heavy tails in this paper, which are α stable distribution, and 1<α<2, and even the noises belong to α stable distribution. Then the conventional spectral analysis methods degenerate and even fail under α stable distribution environment. Several improved frequency spectral analysis methods are proposed employing fractional lower order covariation or fractional lower

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2

Корсунская, Юлия, and Yulia Korsunskaja. "Heuristic model of solar X-ray spectrum according to satellite data for geophysical applications." Solar-Terrestrial Physics 5, no. 3 (2019): 75–86. http://dx.doi.org/10.12737/stp-53201909.

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Model and computational algorithm for recovering the X-ray component of the solar spectrum based on GOES XL (0.1–0.8 nm), XS (0.05–0.4 nm or 0.05–0.3 nm) and SDO QD (0.1–7 nm) channels data are presented. The model based the Mewe approximation of emission from optically thin plasmas that presents a temperature-like spectrum. The possibility to present the result spectrum as a superposition of Mewe spectrums placed in the solar absorbing atmosphere at one optical depth for its temperature parameter energy is suggested in this paper. So the model is a variation of the multi-temperature approxima

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3

ESTAREMI, YOUSEF. "On the Composition of Conditional Expectation and Multiplication Operators." Kragujevac Journal of Mathematics 46, no. 6 (2022): 883–94. http://dx.doi.org/10.46793/kgjmat2206.883e.

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In this paper, ﬁrst we provide some necessary and suﬃcient conditions for quasi- normality and quasi- hyponormality of weighted conditional type operators. And then the spectrum, residual spectrum, point spectrum and spectral radius of weighted conditional type operators are computed. As an application, we give an equivalent conditions for weighted conditional type operators to be quasinilpotent. Also, some examples are provided to illustrate concrete applications of the main results.

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Moran, Timothy. "Applications of Sound Spectrum Analysis." Physics Teacher 45, no. 2 (2007): 93–95. http://dx.doi.org/10.1119/1.2432085.

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Xie, B. S., S. Y. Zhou, and L. X. Wu. "AN INTEGRATED MINERAL SPECTRAL LIBRARY USING SHARED DATA FOR HYPERSPECTRAL REMOTE SENSING AND GEOLOGICAL MAPPING." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLIII-B5-2020 (August 24, 2020): 69–75. http://dx.doi.org/10.5194/isprs-archives-xliii-b5-2020-69-2020.

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Abstract. Mineral spectral library (MSL) is the foundation of hyperspectral remote sensing, and a significant tool of storing and managing massive mineral spectral data to facilitate the matching or identifying of unknown rocks and minerals conveniently and fast. However, mineral spectral data are scattered and stored in different spectral libraries worldwide, which behave different spectral resolutions, mineral categories and measurement parameters, and hinder its application in field investigation, mineral identification, landcover identification and geological mapping. An integrated MSL usi

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6

Cheng, Andrew Y. S., Jianhua Zhu, and Michael C. Y. Pau. "Characterization of a Noncolinear Acousto-Optic Tunable Filter and its Resolution Enhancement as a Near-Infrared Spectrometer." Applied Spectroscopy 55, no. 3 (2001): 350–55. http://dx.doi.org/10.1366/0003702011951768.

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An automatic near-infrared (NIR) spectrometer based on a noncolinear acousto-optic tunable filter (AOTF) is constructed for high-speed spectrometry. Its initial spectral characteristics are studied systematically for application. The AOTF is a solid-state, rugged, compact, and high-speed device and can be readily used for spectral measurement applications, but some broadening and overlapping effects will occur when it is used for the measurement of a narrow-band spectrum. In order to correct the spectral distortion and obtain a fine spectrum, a new resolution enhancement procedure, which combi

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Nikolaeva, Vera, and Evgeny Gordeev. "SPAM: Solar Spectrum Prediction for Applications and Modeling." Atmosphere 14, no. 2 (2023): 226. http://dx.doi.org/10.3390/atmos14020226.

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Solar Spectrum Prediction for Applications and Modeling (SPAM) is a new empirical model of solar X-ray, extreme ultraviolet and far ultraviolet radiation flux at the top of the Earth’s atmosphere. The model is based on 14 years of daily averaged TIMED spacecraft measurements from 2002 to 2016, when its sensors were regularly calibrated. We used a second-order parametrization of the irradiance spectrum by a single parameter—the F10.7 index—which is a reliable and consistently observed measure of solar activity. The SPAM model consists of two submodels for general and specific use. The first is

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Pan, Mengguan, Baixiao Chen, and Minglei Yang. "A General Range-Velocity Processing Scheme for Discontinuous Spectrum FMCW Signal in HFSWR Applications." International Journal of Antennas and Propagation 2016 (2016): 1–13. http://dx.doi.org/10.1155/2016/2609873.

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Discontinuous spectrum signal which has separate subbands distributed over a wide spectrum band is a solution to synthesize a wideband waveform in a highly congested spectrum environment. In this paper, we present a general range-velocity processing scheme for the discontinuous spectrum-frequency modulated continuous wave (DS-FMCW) signal specifically. In range domain, we propose a simple time rearrangement operation which converts the range transform problem of the DS-FMCW signal to a general spectral estimation problem of nonuniformly sampled data. Conventional periodogram results in a dirty

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9

Fabila-Carrasco, John Stewart, and Fernando Lledó. "Covering Graphs, Magnetic Spectral Gaps and Applications to Polymers and Nanoribbons." Symmetry 11, no. 9 (2019): 1163. http://dx.doi.org/10.3390/sym11091163.

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In this article, we analyze the spectrum of discrete magnetic Laplacians (DML) on an infinite covering graph G ˜ → G = G ˜ / Γ with (Abelian) lattice group Γ and periodic magnetic potential β ˜ . We give sufficient conditions for the existence of spectral gaps in the spectrum of the DML and study how these depend on β ˜ . The magnetic potential can be interpreted as a control parameter for the spectral bands and gaps. We apply these results to describe the spectral band/gap structure of polymers (polyacetylene) and nanoribbons in the presence of a constant magnetic field.

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10

Gil', Michael. "Spectrum localization of a perturbed operator in a strip and applications." Opuscula Mathematica 41, no. 3 (2021): 395–412. http://dx.doi.org/10.7494/opmath.2021.41.3.395.

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Let \(A\) and \(\tilde{A}\) be bounded operators in a Hilbert space. We consider the following problem: let the spectrum of \(A\) lie in some strip. In what strip the spectrum of \(\tilde{A}\) lies if \(A\) and \(\tilde{A}\) are "close"? Applications of the obtained results to integral operators and matrices are also discussed. In addition, we apply our perturbation results to approximate the spectral strip of a Hilbert-Schmidt operator by the spectral strips of finite matrices.

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11

Haddad, M., A. Hayar, and M. Debbah. "Spectral efficiency of spectrum-pooling systems." IET Communications 2, no. 6 (2008): 733. http://dx.doi.org/10.1049/iet-com:20070469.

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12

Корсунская, Юлия, and Yulia Korsunskaja. "Heuristic model of solar X-ray spectrum according to satellite data for geophysical applications." Solnechno-Zemnaya Fizika 5, no. 3 (2019): 89–101. http://dx.doi.org/10.12737/szf-53201909.

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Model and computational algorithm for recovering the X-ray component of the solar spectrum based on GOES XL (0.1–0.8 nm), XS (0.05–0.4 nm or 0.05–0.3 nm) and SDO QD (0.1–7 nm) channels data are presented. The model based the Mewe approximation of emission from optically thin plasmas that presents a temperature-like spectrum. The possibility to present the result spectrum as a superposition of Mewe spectrums placed in the solar absorbing atmosphere at one optical depth for its temperature parameter energy is suggested in this paper. So the model is a variation of the multi-temperature approxima

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13

Dayana, R., and R. Kumar. "Modified isotropic orthogonal transform algorithm-universal filtered multicarrier transceiver for 5G cognitive radio application." International Journal of Electrical and Computer Engineering (IJECE) 9, no. 4 (2019): 3100. http://dx.doi.org/10.11591/ijece.v9i4.pp3100-3107.

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Rapid developments in modern wireless communication permit the trade of spectrum scarcity. Higher data rate and wider bandwidth emerge the development in growing demand of wireless communication system. The innovative solution for the spectrum scarcity is cognitive radio (CR). Cognitive radio is the significant technology used to utilize the spectrum effectively. The important aspect of CR is sensing the spectrum band and detects the presence or absence of the primary user in the licensed band. Moreover, another serious issue in next generation (5G) wireless communication is to decide the less

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14

Nolte, Dick. "Applications for a modularised spectrum analyser." Electronics and Power 31, no. 3 (1985): 218. http://dx.doi.org/10.1049/ep.1985.0150.

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15

Kwon, Youngsun, Duk Kyu Park, and Hongjai Rhee. "Spectrum fragmentation: Causes, measures and applications." Telecommunications Policy 41, no. 5-6 (2017): 447–59. http://dx.doi.org/10.1016/j.telpol.2017.02.006.

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16

Economou, EG. "Spread spectrum systems with commercial applications." Computer Communications 18, no. 7 (1995): 521. http://dx.doi.org/10.1016/0140-3664(95)90004-7.

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17

Magill, D. T., F. D. Natali, and G. P. Edwards. "Spread-spectrum technology for commercial applications." Proceedings of the IEEE 82, no. 4 (1994): 572–84. http://dx.doi.org/10.1109/5.282243.

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18

Tikhomirov, Alexander A., Sophia A. Ushakova, and Valentin N. Shikhov. "Features Choice of Light Sources for Bio-Technical Life Support Systems for Space Applications." Volume 26, Number 4, 2018, no. 04-2018 (December 2018): 117–21. http://dx.doi.org/10.33383/2018-047.

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The historical aspects and prospects of the use of artificial light sources in the biological and technical systems of life support for space applications are considered. According to the given data, the most promising for such systems are LED light sources. Based on the results of photobiological studies it is shown that radiation, perceived by a man as white, in his spectral efficiency unreliable differs from radiation, a spectral curve similar to the average action spectrum of photosynthesis the green sheet (“Phyto”). In accordance with this, the possibility of choosing either a phyto spect

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19

Fiol, Miquel Àngel, Josep Fàbrega, and Victor Diego. "Equivalent Characterizations of the Spectra of Graphs and Applications to Measures of Distance-regularity." Electronic Journal of Linear Algebra 36, no. 36 (2020): 629–44. http://dx.doi.org/10.13001/ela.2020.5061.

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The spectrum of a graph usually provides a lot of information about its combinatorial structure. Moreover, from the spectrum, the so-called predistance polynomials can be defined, as a generalization, for any graph, of the distance polynomials of a distance-regular graph. Going further, the preintersection numbers generalize the intersection numbers of a distance-regular graph. This paper describes, for any graph, the closed relationships between its spectrum, predistance polynomials, and preintersection numbers. Then, some applications to derive combinatorial properties of the given graph, mo

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20

Shim, Jaeho, and Ym Ram. "Spectral Confonning Model and Its Application." Journal of Vibration and Control 10, no. 6 (2004): 837–60. http://dx.doi.org/10.1177/1077546304040427.

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It has been observed that finite elem-ent or finite difference models of order n can approximate with fair accuracy less than one-third of the eigenvalues of the underlying continuous system corresponding to the low spectrum. We present a new spectral conforming discrete model that estimates n the lowest eigenvalues of the continuous system with uniform accuracy. The building block of the model is the fundamental inverse eigenvalue problem of reconstructing the chain of a mass-spring system with a prescribed spectrum. We present applications of the model in vibration control of continuous syst

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21

Shameem, B. M., and V. Anantha Subramanian. "Sea wave modelling for motion control applications." Journal of Naval Architecture and Marine Engineering 11, no. 1 (2014): 29–38. http://dx.doi.org/10.3329/jname.v11i1.17768.

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The modelling of sea environment is important in designing an effective motion control system for any marine vehicle. Inadequate representation of the components of a typical random sea might lead to poor performance of the control system. A multiple output system such as the one having components of wave elevation and slope, facilitates designing the control system taking into account the different degrees of freedom. The method of modelling the sea environment presented here, provides the basis for the design of motion control systems for multiple degree of freedom cases, which give rise to

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22

Huang, Jianhua, Lu Tang, Nan Chen, and Guoping Du. "Broadening the Photoluminescence Excitation Spectral Bandwidth of YVO4:Eu3+ Nanoparticles via a Novel Core-Shell and Hybridization Approach." Materials 12, no. 23 (2019): 3830. http://dx.doi.org/10.3390/ma12233830.

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For many optoelectronic applications, it is desirable for the lanthanide-doped phosphors to have broad excitation spectrum. The excitation mechanism of the lanthanide-doped YVO4, a high quantum efficient lasing material, primarily originates from the energy transfer process from the host VO43− complexes to the lanthanide ions, which has an excitation spectral bandwidth range of 230–330 nm. For applications in silicon solar cells, such phosphors can convert ultraviolet light to visible light for more efficient power generation, but this spectral range is still not broad enough to cover the enti

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23

Li, Xianzhe. "Quantitative reducibility of Gevrey quasi-periodic cocycles and its applications." Nonlinearity 35, no. 12 (2022): 6124–55. http://dx.doi.org/10.1088/1361-6544/ac98ed.

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Abstract We establish a quantitative version of strong almost reducibility result for S L ( 2 , R ) quasi-periodic cocycle close to a constant in the Gevrey class. We prove that, if the frequency is Diophantine, the long range operator has pure point spectrum with sub-exponentially decaying eigenfunctions for almost all phases; for the one dimensional quasi-periodic Schrödinger operators with small Gevrey potentials, the length of spectral gaps decays sub-exponentially with respect to its labelling; and the spectrum is an interval for discrete Schrödinger operators acting on Z d with small sep

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24

Georgelin, Y. P., G. Comte, and E. le Coarer. "The PYTHEAS concept and applications." International Astronomical Union Colloquium 149 (1995): 300–307. http://dx.doi.org/10.1017/s0252921100023204.

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AbstractThe PYTHEAS instrumental concept is an attempt to solve the problem of getting a complete tridimensional coverage of the observed field with a high spectral resolution across a wide spectral range. It is an integral field spectrometer derived from the TIGER spectrograph (field sampling with a microlens array) in which a scanning Fabry-Perot (FP) is introduced. The spectral resolution is given by the F P and the spectral range is that allowed by the grism of TIGER. The information is recorded on the CCD as a set of channeled spectra, for each microlens and each scanning step of the FP.

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25

Kelleher, J. K., A. T. Kharroubi, T. A. Aldaghlas, et al. "Isotopomer spectral analysis of cholesterol synthesis: applications in human hepatoma cells." American Journal of Physiology-Endocrinology and Metabolism 266, no. 3 (1994): E384—E395. http://dx.doi.org/10.1152/ajpendo.1994.266.3.e384.

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Cholesterol synthesis from 13C-labeled precursors produces a discrete spectrum of mass isotopomers detectable using gas chromatography-mass spectrometry. The isotopomer spectral analysis (ISA) method matches the observed spectrum of cholesterol isotopomers with a mathematical model to obtain the best fit of model spectrum to data spectrum. The model was based on multinomial probability expressions that simulate cholesterol synthesis as a condensation of mevalonate fragments. As many as four unknown parameters, representing fluxes between compartments, were included in the model. Models were de

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Nandakumar, R., Vijayakumar Ponnusamy, and Aman Kumar Mishra. "LSTM Based Spectrum Prediction for Real-Time Spectrum Access for IoT Applications." Intelligent Automation & Soft Computing 35, no. 3 (2023): 2805–19. http://dx.doi.org/10.32604/iasc.2023.028645.

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Tecchia, Franco. "A Flexible Framework for Wide‐Spectrum VR Development." Presence: Teleoperators and Virtual Environments 19, no. 4 (2010): 302–12. http://dx.doi.org/10.1162/pres_a_00002.

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This paper presents results and experiences coming from 10 years of development and use of XVR, a flexible, general-purpose framework for virtual reality (VR) development. The resulting architecture, that comes under the form of a self-sufficient integrated development environment (IDE) organized around a dedicated scripting language and a virtual machine, is able to accommodate a wide range of applications needs, ranging from simple Web3D applications to motion-based simulators or complex cluster-based immersive visualization systems. Within the framework a common, archetypical structure is u

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Najer, Adrian, Dalin Wu, Daniela Vasquez, Cornelia G. Palivan, and Wolfgang Meier. "Polymer nanocompartments in broad-spectrum medical applications." Nanomedicine 8, no. 3 (2013): 425–47. http://dx.doi.org/10.2217/nnm.13.11.

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29

Short, Robert. "Expanding spectrum of clinical applications of cytokines." Inpharma Weekly &NA;, no. 956 (1994): 9–10. http://dx.doi.org/10.2165/00128413-199409560-00017.

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30

Kumar, Basant, Harsh Vikram Singh, Surya Pal Singh, and Anand Mohan. "Secure Spread-Spectrum Watermarking for Telemedicine Applications." Journal of Information Security 02, no. 02 (2011): 91–98. http://dx.doi.org/10.4236/jis.2011.22009.

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31

Solari, Giovanni. "Equivalent Wind Spectrum Technique: Theory and Applications." Journal of Structural Engineering 114, no. 6 (1988): 1303–23. http://dx.doi.org/10.1061/(asce)0733-9445(1988)114:6(1303).

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32

Yen, David C., David C. Chou, and J. Michael Tarn. "Applications and development of spread spectrum technology." Technology in Society 22, no. 4 (2000): 525–35. http://dx.doi.org/10.1016/s0160-791x(00)00025-7.

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33

Malliaris, Maryanthe, and Saharon Shelah. "Model-theoretic applications of cofinality spectrum problems." Israel Journal of Mathematics 220, no. 2 (2017): 947–1014. http://dx.doi.org/10.1007/s11856-017-1526-7.

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34

Sahai, A., S. M. Mishra, R. Tandra, and K. A. Woyach. "Cognitive Radios for Spectrum Sharing [Applications Corner]." IEEE Signal Processing Magazine 26, no. 1 (2009): 140–45. http://dx.doi.org/10.1109/msp.2008.930435.

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Rimon, Uri, Eitan Heldenberg, Gil Golan, Amichai Shinfeld, and Alexander Garniek. "Amplatzer Vascular Plug: Expanding the Applications Spectrum." CardioVascular and Interventional Radiology 31, S2 (2007): 84–87. http://dx.doi.org/10.1007/s00270-007-9042-5.

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Solari, Giovanni. "Thunderstorm response spectrum technique: Theory and applications." Engineering Structures 108 (February 2016): 28–46. http://dx.doi.org/10.1016/j.engstruct.2015.11.012.

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37

Greef, R. "Ellipsometry in electrochemistry: a spectrum of applications." Thin Solid Films 233, no. 1-2 (1993): 32–39. http://dx.doi.org/10.1016/0040-6090(93)90056-u.

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Frougny, Ch, and E. Pelantová. "Two applications of the spectrum of numbers." Acta Mathematica Hungarica 156, no. 2 (2018): 391–407. http://dx.doi.org/10.1007/s10474-018-0856-1.

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Zetian, Ye. "Frequency Spectrum Zone Images and Their Applications." National Remote Sensing Bulletin, no. 2 (1993): 139–46. http://dx.doi.org/10.11834/jrs.1993014.

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Wan, Yangyang, Xinyu Fan, and Zuyuan He. "Review on Speckle-Based Spectrum Analyzer." Photonic Sensors 11, no. 2 (2021): 187–202. http://dx.doi.org/10.1007/s13320-021-0628-3.

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AbstractAccurate spectral measurement and wavelength determination are fundamental and vital for many fields. A compact spectrum analyzer with high performance is expected to meet the growing requirements, and speckle-based spectrum analyzer is a potential solution. The basic principle is based on using the random medium to establish a speckle-to-wavelength mapping relationship for spectrum reconstruction. This article introduces current speckle-based spectrum analyzers with different schemes and reviews recent advances in this field. Besides, some applications by using speckle-based spectrum

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Oleinik, Phelype Haron, Gabriel Pereira Tavares, Bianca Neves Machado, and Liércio André Isoldi. "Transformation of Water Wave Spectra into Time Series of Surface Elevation." Earth 2, no. 4 (2021): 997–1005. http://dx.doi.org/10.3390/earth2040059.

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Spectral wave modelling is widely used to simulate large-scale wind–wave processes due to its low computation cost and relatively simpler formulation, in comparison to phase-resolving or hydrodynamic models. However, some applications require a time-domain representation of sea waves. This article proposes a methodology to transform the wave spectrum into a time series of water surface elevation for applications that require a time-domain representation of ocean waves. The proposed method uses a generated phase spectrum and the inverse Fourier transform to turn the wave spectrum into a time se

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Arygunartha, Gede Yohanes, and Ni Luh Putri Setyaningsih. "Refraction of Light on Prisma Applications." Agriwar Journal 2, no. 1 (2022): 19–27. http://dx.doi.org/10.22225/aj.2.1.2022.19-27.

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A prism is a clear object made of glass. Its uses include directing light beams, changing and invertingshadows, and breaking white light into the colors of the spectrum (rainbow colors). The difference in thecolor of the spectrum is caused by the difference in the wavelength and frequency of the constituent rays,so that in the medium these rays have different refractive indices. Assume that the medium around the prismis air. This is called the angle of deviation. The angle of deviation is the angle formed by the intersectionof the extended incident light and the extended refracted light leavin

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Chai, Jinjin, Zilong Wang, and Erzhong Xue. "Walsh spectrum and nega spectrum of complementary arrays." Designs, Codes and Cryptography 89, no. 12 (2021): 2663–77. http://dx.doi.org/10.1007/s10623-021-00938-9.

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Ghabban, Fahad Mahmoud, Mohammed Hajjar, and Saad Alharbi. "Usability Evaluation and User Acceptance of Mobile Applications for Saudi Autistic Children." International Journal of Interactive Mobile Technologies (iJIM) 15, no. 07 (2021): 30. http://dx.doi.org/10.3991/ijim.v15i07.19881.

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<p class="Body">The evolution of mobile technologies in learning, has been increased the requirements for developing appropriate usability model to fall into the same line with mobile learning applications. Usability of mobile learning applications is a topic that is into research, this paper focuses a tailored designed model called (M-UTUAT) mobile usability model that combines People at the Centre of Mobile Application Development (PACMAD) and the unified theory of acceptance and use of technology (UTAUT) to form a more robust model. As an addition to the usability research, an applica

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Saadi, Muhammad, and Lunchakorn Wuttisittikulkij. "Visible Light Communication – The Journey So Far." Journal of Optical Communications 40, no. 4 (2019): 447–53. http://dx.doi.org/10.1515/joc-2017-0107.

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Abstract An unprecedented demand for connecting physical objects with the internet expedites the realization of internet of things, thus creating new challenges to explore new spectrums which are suitable for communication. Visible light communication (VLC) is one promising candidate not only to remove the spectrum crunch issues but also to offer virtually unlimited, unregulated spectrum. This paper discusses how VLC can help solving spectrum crunch, non-availability issues of radio frequency spectrum and how readily available spectrum of VLC can be utilized to cope up with the bandwidth requi

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Shi, Yan Li, Chun Mei Du, Lin Ren, and Hai Xia Yu. "Research on the Existence Detection of DSSS Signal Based on Auto-Correlation." Applied Mechanics and Materials 513-517 (February 2014): 2963–66. http://dx.doi.org/10.4028/www.scientific.net/amm.513-517.2963.

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In practical applications, the DSSS signal has very low power spectral density, and its application range is very wide, so in the non cooperative communication, if on the premise that the spread spectrum sequence is unaware, how to detect and estimate the existence of DSSS signal is very important, this has very strong application background. This paper introduces the time domain correlation detection method of DSSS signal, through the simulation can validate that this way can detect the existence of signal; it lays the theoretical foundation for practical application.

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Zhou, Minghao, and Rongying Dai. "Study on Characteristic Raman Shift Screening Method Based on MPA for Raman Spectrum of Mine Water Inrush Source." Scientific Programming 2022 (August 23, 2022): 1–8. http://dx.doi.org/10.1155/2022/5202265.

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In the process of mine water inrush disaster prevention, accurate and rapid identification of water inrush source type is of great significance to coal mine safety production. However, traditional hydrochemical methods have shortcomings such as time-consuming and complex detection. Therefore, a new idea of identifying mine water inrush source by Raman spectroscopy is proposed. Goaf water, roof sandstone fissure water, Ordovician limestone water, Taiyuan limestone water, and surface water as well as their mixed water samples are selected as research objects, and Raman spectral data of different

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Li, Jing, Wenjiang Tan, Jinhai Si, Zhen Kang, and Xun Hou. "Generation of Ultrabroad and Intense Supercontinuum in Mixed Multiple Thin Plates." Photonics 8, no. 8 (2021): 311. http://dx.doi.org/10.3390/photonics8080311.

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Supercontinuum (SC) generation using multiple thin plates is demonstrated with a femtosecond laser pulse. We propose an improved technique to obtain larger spectrum broadening and higher spectral intensity by employing mixed multiple thin plates with different thicknesses and materials. Furthermore, the spectrum has good stability, which is superior to that of the spectrum induced by the traditional single filament in bulk material. Our approach offers a route towards simple and stable SC generation for potential applications.

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Nuroldayeva, Gulzat, and Mannix P. Balanay. "Flexing the Spectrum: Advancements and Prospects of Flexible Electrochromic Materials." Polymers 15, no. 13 (2023): 2924. http://dx.doi.org/10.3390/polym15132924.

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Abstract:

The application potential of flexible electrochromic materials for wearable devices, smart textiles, flexible displays, electronic paper, and implantable biomedical devices is enormous. These materials offer the advantages of conformability and mechanical robustness, making them highly desirable for these applications. In this review, we comprehensively examine the field of flexible electrochromic materials, covering topics such as synthesis methods, structure design, electrochromic mechanisms, and current applications. We also address the challenges associated with achieving flexibility in el

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Angrisani, Leopoldo, Domenico Capriglione, Gianni Cerro, Luigi Ferrigno, and Gianfranco Miele. "On Employing a Savitzky-Golay Filtering Stage to Improve Performance of Spectrum Sensing in CR Applications Concerning VDSA Approach." Metrology and Measurement Systems 23, no. 2 (2016): 295–308. http://dx.doi.org/10.1515/mms-2016-0019.

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Abstract In this paper, a filtering stage based on employing a Savitzky-Golay (SG) filter is proposed to be used in the spectrum sensing phase of a Cognitive Radio (CR) communication paradigm for Vehicular Dynamic Spectrum Access (VDSA). It is used to smooth the acquired spectra, which constitute the input for a spectrum sensing algorithm. The sensing phase is necessary, since VDSA is based on an opportunistic approach to the spectral resource, and the opportunities are represented by the user-free spectrum zones, to be detected through the sensing phase. Each filter typology presents peculiar

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