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Maxim Protasov, Kirill Gadylshin, Dmitry Neklyudov and Ludek Klimes
This study considers the full waveform inversion (FWI) method based on the asymptotic solution of the Helmholtz equation. We provide frequency-dependent ray tracing to obtain the wave field used to compute the FWI gradient and calculate the modeled data....
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Yasir Bashir, Nordiana Mohd Muztaza, Seyed Yaser Moussavi Alashloo, Syed Haroon Ali and Deva Prasad Ghosh
Fractured imaging is an important target for oil and gas exploration, as these images are heterogeneous and have contain low-impedance contrast, which indicate the complexity in a geological structure. These small-scale discontinuities, such as fractures...
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Roxána Varga, Robert Mettin
Pág. 326 - 335
A parameter identification technique of an underlying bubble model of an experimentally observed single bubble in a cluster under dual-frequency external forcing is presented. The measurements are carried out via high-speed camera recordings at a ra...
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Alex Elías-Zúñiga, Luis M. Palacios-Pineda, Daniel Olvera-Trejo and Oscar Martínez-Romero
The aim of this paper focuses on finding equivalent representation forms of forced, damped, two degree-of-freedom, nonlinear systems in the sense of Lyapunov by using a nonlinear transformation approach that provides decoupled, forced, damped, nonlinear ...
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O. S. Raspopov
Pág. 110 - 115
The graph and finite-state machine models for forming spatial vibration frequency equations with continuous parameters are used. The example of calculation of vibrations of bi-regular beam with different section characteristics is presented.
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Chih-Chiang Hong
Pág. 84 - 97
The objective of this study is to provide the frequency solutions of free vibration in thick FGM circular cylindrical shells by mainly considering both shear correction coefficient and nonlinear coefficient term. This paper investigates the effects of th...
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David Keast and Joanna Ellison
Flood frequency analysis using partial series data has been shown to provide better estimates of small to medium magnitude flood events than the annual series, but the annual series is more often employed due to its simplicity. Where partial series avera...
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Oskar Bschorr and Hans-Joachim Raida
A vibration absorber consisting of a one-dimensional waveguide with a reflectionless termination extracts vibrational energy from a structure that is to be damped. An optimum energy dissipation occurs for the so-called power adjustment, i.e, the same lev...
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Andrei Khrennikov and Masanari Asano
We present the quantum-like model of information processing by the brain?s neural networks. The model does not refer to genuine quantum processes in the brain. In this model, uncertainty generated by the action potential of a neuron is represented as qua...
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Frank Lemmer, Wei Yu and Po Wen Cheng
Methods for coupled aero-hydro-servo-elastic time-domain simulations of Floating Offshore Wind Turbines (FOWTs) have been successfully developed. One of the present challenges is a realistic approximation of the viscous drag of the wetted members of the ...
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Wanan Sheng, Evdokia Tapoglou, Xiandong Ma, C. James Taylor, Robert Dorrell, Daniel R. Parsons and George Aggidis
The study of wave-structure interactions involving nonlinear forces would often make use of the popular hybrid frequency?time domain method. In the hybrid method, the frequency-domain analysis could firstly provide the reliable and accurate dynamic param...
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Yosuke Yamada, Miyuki Nishizawa, Tomoka Uchiyama, Yasuhiro Kasahara, Mikio Shindo, Motohiko Miyachi and Shigeho Tanaka
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Hanxue Zhang, Chong Shen, Xuemei Chen, Huiliang Cao, Donghua Zhao, Haoqian Huang and Xiaoting Guo
In this paper, we present a radial basis function (RBF) and cubature Kalman filter (CKF) based enhanced fusion strategy for vision and inertial integrated attitude measurement for sampling frequency discrepancy and divergence. First, the multi-frequency ...
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Quanquan Wang, Zukun Song, Jian Zhu and Huazhong Liu
The marching-on-in-degree (MOD) method is applied in this paper to analyze the transient electromagnetic scattering of multilayer graphene and a dielectric substrate. The time domain resistive boundary condition (TD-RBC) integral equation and time domain...
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Chenghua Cong, Honggang Qin and Xingyou Yi
The unsteady characteristics of the second throat of a transonic wind tunnel have an important influence on the design and test of the wind tunnel. Therefore, the forced oscillation characteristics were studied by a numerical simulation method. The gover...
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Hassan Haes Alhelou, Mohamad Esmail Hamedani Golshan, Takawira Cuthbert Njenda and Pierluigi Siano
In the event of a generator loss or disturbance, the power system frequency declines quickly and overall system stability is at risk. During these scenarios, under frequency load shedding is triggered to restore the power system frequency. The main stage...
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Andrii Sulym, Pavlo Khozia, Eduard Tretiak, Václav Pí?tek, Oleksij Fomin and Pavel Kucera
This article deals with the method of computer-aided studies of the results of tank container impact tests to confirm the ability of portable tanks and multi-element gas containers to withstand the impact in the longitudinal direction on a specially equi...
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Mehdi Alimoradzadeh, Mehdi Salehi, Sattar Mohammadi Esfarjani
Pág. 97 - 108
In this study, a non-classical approach was developed to analyze nonlinear free and forced vibration of an Axially Functionally Graded (AFG) microbeam by means of modified couple stress theory. The beam is considered as Euler-Bernoulli type supported on ...
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Jun Yuan, Jun Li, Anfu Zhang, Xiangdong Zhang and Jia Ran
This paper presents an algorithm structure for an active noise control (ANC) system based on an improved equation error (EE) model that employs the offline secondary path modeling method. The noise of a compressor in a gas station is taken as an example ...
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Jun-Hyung Kim, Yuan-Wu Jiang and Sang-Moon Hwang
A vibrating motor is a multi-physics product in which there is coupling between electrical, magnetic, and mechanical domains. To obtain a more accurate analysis, nonlinear parameters, such as inductance, speedance, and force factor, are considered as fun...
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