Relevant bibliographies by topics / Band-superposition approach

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  2. Dissertations / Theses
  3. Conference papers

Academic literature on the topic 'Band-superposition approach'

Author: Grafiati
Published: 10 March 2023
Last updated: 31 July 2025

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Journal articles on the topic "Band-superposition approach"

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Kityk, Ivan V. "Band energy approach and nonlinear optical phenomena in large-sized nanoparticles." Journal of Telecommunications and Information Technology, no. 4 (December 30, 2006): 96–101. http://dx.doi.org/10.26636/jtit.2006.4.388.

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This report presents principal optical properties of semiconducting large-sized nanocrystalline (LSNC) material with thickness within 10–50 nm range. A quantitative parameter for description of the LSNC state is introduced. Influence of the surrounding polymer matrices on the properties of the LSNC is shown. Role of the surrounding polymer matrix background in the manifestation of material optoelectronic properties is studied. Superposition of long-range ordering with the localized nano-quantized effects is analyzed within a framework of different one-electron band energy approaches. Manifesta
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Xiao, Bin, Yu-long Zhou, Chao Gao, et al. "Vibration Analysis of Driving-Point System with Uncertainties Using Polynomial Chaos Expansion." Shock and Vibration 2020 (September 28, 2020): 1–14. http://dx.doi.org/10.1155/2020/8074351.

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A vibration transfer analysis method based on polynomial chaos expansion (PCE) is proposed in this study and is used to analyze the stochastic dynamic compliance of uncertain systems with the Gaussian distribution. The random dynamic compliance is established by utilizing mode superposition on the system as the parameters of system uncertainties are regarded as input variables. Considering the asymptotic probability density function of mode shape, the dynamic compliance is decomposed into the mean of mode shape and the subsystem represented as an orthogonal polynomial expansion. Following this
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Sacchi, Mauricio D., and Tadeusz J. Ulrych. "Estimation of the discrete Fourier transform, a linear inversion approach." GEOPHYSICS 61, no. 4 (1996): 1128–36. http://dx.doi.org/10.1190/1.1444033.

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Spatio‐temporal analysis of seismic records is of particular relevance in many geophysical applications, e.g., vertical seismic profiles, plane‐wave slowness estimation in seismographic array processing and in sonar array processing. The goal is to estimate from a limited number of receivers the 2-D spectral signature of a group of events that are recorded on a linear array of receivers. When the spatial coverage of the array is small, conventional f-k analysis based on Fourier transform leads to f-k panels that are dominated by sidelobes. An algorithm that uses a Bayesian approach to design a
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Zhang, Ming, and Qing-Guang Chen. "Numerical Model on the Dynamic Behavior of a Prototype Kaplan Turbine Runner." Mathematical Problems in Engineering 2021 (September 8, 2021): 1–12. http://dx.doi.org/10.1155/2021/4421340.

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Experimental and numerical investigations of the modal behavior of a prototype Kaplan turbine runner in air have been conducted in this paper. The widely used roving accelerometer method was used in the experimental modal analysis. A systematic approach from a single blade model to the whole runner has been used in the simulation to get a thorough understanding. The experimental results show that all the detected modes concentrate their displacements on the impacted blade. The numerical results show that the modes of the single blade form different mode families of the runner, and each mode fa
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Castagna, Alexandre, Stefan Simis, Heidi Dierssen, Quinten Vanhellemont, Koen Sabbe, and Wim Vyverman. "Extending Landsat 8: Retrieval of an Orange contra-Band for Inland Water Quality Applications." Remote Sensing 12, no. 4 (2020): 637. http://dx.doi.org/10.3390/rs12040637.

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The Operational Land Imager (OLI) onboard Landsat 8 has found successful application in inland and coastal water remote sensing. Its radiometric specification and high spatial resolution allows quantification of water-leaving radiance while resolving small water bodies. However, its limited multispectral band set restricts the range of water quality parameters that can be retrieved. Identification of cyanobacteria biomass has been demonstrated for sensors with a band centered near 620 nm, the absorption peak of the diagnostic pigment phycocyanin. While OLI lacks such a band in the orange regio
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Yang, Fan, and Bin Deng. "Filtering performance and optimization of double-chamber compound hydraulic attenuators." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 232, no. 18 (2017): 3250–62. http://dx.doi.org/10.1177/0954406217733293.

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At present, double expansion chamber structures are widely used in the field of acoustic attenuation, and two kinds of double-chamber compound structures for hydraulic attenuators are proposed in this paper. A one-dimensional analytical approach was developed to predict the pressure pulsation attenuation performance of these two structures, and comparisons of insertion loss predictions with experimental results illustrated that the one-dimensional approach is suitable for accurate prediction among the research frequency band. This approach was then used to investigate the effects of porosity a
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Tommasino, Domenico, Federico Moro, Bruno Bernay, Thibault De Lumley Woodyear, Enrique de Pablo Corona, and Alberto Doria. "Vibration Energy Harvesting by Means of Piezoelectric Patches: Application to Aircrafts." Sensors 22, no. 1 (2022): 363. http://dx.doi.org/10.3390/s22010363.

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Vibration energy harvesters in industrial applications usually take the form of cantilever oscillators covered by a layer of piezoelectric material and exploit the resonance phenomenon to improve the generated power. In many aeronautical applications, the installation of cantilever harvesters is not possible owing to the lack of room and/or safety and durability requirements. In these cases, strain piezoelectric harvesters can be adopted, which directly exploit the strain of a vibrating aeronautic component. In this research, a mathematical model of a vibrating slat is developed with the modal
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Tuvi, Ram, Zeyu Zhao, and Mrinal K. Sen. "Multifrequency beam-based migration in inhomogeneous media using windowed Fourier transform frames." Geophysical Journal International 223, no. 2 (2020): 1086–99. http://dx.doi.org/10.1093/gji/ggaa365.

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SUMMARY We consider the problem of inhomogeneous subsurface imaging using beam waves. The formulation is based on the ultra-wide-band phase-space beam summation (UWB-PS-BS) method, which is structured upon windowed Fourier transform (WFT) expansions of surface fields and sources. In this approach, the radiated field is given as a superposition of beam propagators. Here, we use the beams first for expanding the surface sources and the scattered data, and then for imaging where we use the backpropagation and cross-correlation of beams. This formulation enables a target oriented imaging approach,
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Seredin, Pavel, Tatiana Litvinova, Yuri Ippolitov, et al. "Multivariate Spectroscopic Analysis of Protein Secondary Structures in Gingival Crevicular Fluid: Insights from FTIR Amide III Band Across Oral Disease Stages." International Journal of Molecular Sciences 26, no. 10 (2025): 4693. https://doi.org/10.3390/ijms26104693.

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This study applies multivariate data analysis to deconvolute the spectral profiles of the Amide III region in the infrared spectra of gingival crevicular fluid (GCF). This reveals the impact of major oral diseases, such as dental caries and periodontal diseases, on the transformation of the secondary structure of GCF proteins. A two-stage analytical approach was employed: first, principal component analysis (PCA) was performed to establish the main factors of variation in the data, followed by pairwise comparisons of the samples based on the results of the Amide III profile deconvolution. The
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Sheng, Peng, Xin Fang, Dianlong Yu, and Jihong Wen. "Nonlinear metamaterial enabled aeroelastic vibration reduction of a supersonic cantilever wing plate." Applied Mathematics and Mechanics 45, no. 10 (2024): 1749–72. http://dx.doi.org/10.1007/s10483-024-3165-7.

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AbstractThe violent vibration of supersonic wings threatens aircraft safety. This paper proposes the strongly nonlinear acoustic metamaterial (NAM) method to mitigate aeroelastic vibration in supersonic wing plates. We employ the cantilever plate to simulate the practical behavior of a wing. An aeroelastic vibration model of the NAM cantilever plate is established based on the mode superposition method and a modified third-order piston theory. The aerodynamic properties are systematically studied using both the timedomain integration and frequency-domain harmonic balance methods. While present
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Dissertations / Theses on the topic "Band-superposition approach"

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Barni, N. "Nonlinear buffeting response of suspension bridges considering time-variant self-excited forces." Doctoral thesis, 2022. http://hdl.handle.net/2158/1278784.

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In the last thirty years, the aerodynamic nonlinearities related to the slow variation of the angle of attack produced by large-scale atmospheric turbulence and their impact on the buffeting response of long-span suspension bridges have been a hot topic in wind engineering research. Self-excited forces accounting for such an effect of turbulence have been crucial in predicting the dynamic response of bridge sectional models and long-span suspension bridges subjected to multi-harmonic gusts and the turbulent wind, respectively. Despite several nonlinear aerodynamic models produced by the scient
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Conference papers on the topic "Band-superposition approach"

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Riva, Emanuele, Gabriele Cazzulani, Edoardo Belloni, and Francesco Braghin. "An Optimal Method for Periodic Structures Design." In ASME 2017 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/smasis2017-3837.

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Periodic structures provide filtering behavior for vibrations, as a result of the repetition in space of unit blocks, or unit cells. In general, they are characterized by an internal mechanical impedance mismatch, so that waves are reflected and transmitted every time a discontinuity is present. The global behavior given by waves superposition is their cancellation, only for specific frequency ranges, generally called stop-bands or band-gaps. The variation of non-dimensional parameters shows how these attenuation regions move in the frequency domain: the correspondent diagrams are the main too
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Goyder, Hugh. "Measuring Damping in Linear and Nonlinear Systems." In ASME 2023 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/pvp2023-106667.

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Abstract It is shown how measurements of the decaying response of a vibrating system, following an initial disturbance, can be analysed to extract natural frequency and damping properties. Typically, such data contains a superposition of many vibration modes. By using filtering, it is demonstrated how individual modes can be extracted. The filtering must be done in a special way that involves reversing the data in time and passing it through a narrow band filter and truncating the data. Reversing the data prevents the filter characteristics contaminating the filter output. If the data is from
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Cid Montoya, Miguel, Ahsan Kareem, and Santiago Hernández. "Aero-structural design optimization of long-span bridges: From linear to nonlinear aeroelasticity-driven perspectives." In IABSE Symposium, Istanbul 2023: Long Span Bridges. International Association for Bridge and Structural Engineering (IABSE), 2023. http://dx.doi.org/10.2749/istanbul.2023.0167.

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<p>Structural optimization techniques have been demonstrated to be a powerful tool for the cost-effective design of bridges under aeroelastic considerations, particularly when applied to super-long span suspension or cable-stayed bridges. The efficacy of this methodology relies on the comprehensive and accurate formulation of the wind-resistant design problem. The analysis of the wind-induced responses, such as flutter and buffeting, has been typically addressed in the industry by adopting multi-mode analysis techniques using linear force modeling approaches based on the fundamental cont
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Rahman, Mosfequr, Masud Nawaz, Aniruddha Mitra, Nazanin Bassiri-Gharb, and John E. Jackson. "Experimental Investigation and Finite Element Modeling Analysis of Photostrictive Optical Actuators." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-88274.

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Photostrictive materials are lanthanum-modified lead zirconatetitanate (Pb, La)(Zr, Ti) O3 ceramics doped with WO3, called PLZT, exhibit large photostriction under uniform illumination of high-energy light. Photostrictive materials are ferrodielectric ceramics that have a photostrictive effect. Photostriction arises from a superposition of the photovoltaic effect, i.e. the generation of large voltage from the irradiation of light, and the converse-piezoelectric effect, i.e. expansion or contraction under the voltage applied. Photostrictive materials offer the potential for actuators with many
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