Recent Advances in Underwater Signal Processing

Zhang, Xuebo; Sun, Haixin

doi:10.3390/s23135777

Cited by 2 publications

(2 citation statements)

References 12 publications

(24 reference statements)

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“…Modern techniques use integrated bathymetric and global navigation satellite system (GNSS) positioning system instruments and these approaches have revolutionized the field of dam BT and profile representation (Fuska et al2014a;Phyoe et al2020). These tools enable precise data collection and visualization of the elevation of the dam's bed floor, facilitating the identification of potential risks and the implementation of appropriate maintenance measures (Zhang and Sun, 2023). The application of these advanced technologies enhances the accuracy and efficiency of dam BT monitoring.…”

Section: Introductionmentioning

confidence: 99%

“…By monitoring the dam bottom mphology regularly, engineers, dam managers, and operators can promptly identify trends, patterns, and potential risks (Wu et al, 2021), enabling timely decision-making regarding maintenance and safety measures. Thus, the hydrographic data collected from dams provide valuable insights for assessing the dam's condition (Zhang and Sun, 2023), aiding in detecting changes such as erosion, sedimentation, or deposition that could compromise the dam's structural stability (Wang et al, 2020). Analysis and results from these data empower stakeholders to make well-informed decisions to ensure the dam's safety and longevity (Chen et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

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Study of Short-term Longitudinal Profile and Sediment Dynamics of Ikpoba Reservoir

Alademomi,

Oladosu,

Matthew

2024

Preprint

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Complex depositional systems, exemplified by dam reservoirs, pose significant challenges to natural sediment flow in river courses, impacting operational efficiency. This study focuses on the Ikpoba Dam, a critical water source for Benin City, facing functionality issues due to sedimentation. Through repeated bathymetric surveys conducted during wet and dry seasons, the research maps the dam's bed-floor topography. Analysis using empirical formulae and a geospatial approach unveils short-term sediment accumulation dynamics, emphasizing seasonal variations. Results indicate a sediment volume of 400,000 cubic meters in the 2019 survey, translating to 73.33% loss in storage capacity over 44 years, at an estimated rate of 1.66 m^3/year. Verification of bed profile results demonstrates high reliability, with root mean square errors ranging from 90–93%, employing ArcGIS 10.4. Notably, the study identifies a substantial sediment accumulation of 840,127.34 cubic meters. These findings are pivotal for formulating dredging plans essential for dam revamping initiatives, aiming to optimize efficiency while mitigating sedimentation challenges.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study of Short-term Longitudinal Profile and Sediment Dynamics of Ikpoba Reservoir

Alademomi,

Oladosu,

Matthew

2024

Preprint

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Derivation of Equivalent Material Coefficients of 2-2 Piezoelectric Single Crystal Composite

Sim,

Je,

Cho

et al. 2024

Micromachines

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Piezoelectric composites, which consist of piezoelectric materials and polymers, are widely employed in various applications such as underwater sonar transducers and medical diagnostic ultrasonic transducers. Acoustic transducers based on piezoelectric composites can have high sensitivity with broad bandwidth. In recent studies, it is demonstrated that 2-2 composites based on single crystals provide further increased sensitivity and wide bandwidth. In order to utilize a 2-2 composite in acoustic sensors, it is required to demonstrate the full material coefficients of the 2-2 composite. In this study, we investigated an analytic solution for determining equivalent material coefficients of a 2-2 composite. Impedance spectrums of the single-phase resonators with equivalent material coefficients and 2-2 composite resonators were compared by the finite element method in order to verify the analytic solutions. Furthermore, the equivalent material coefficients derived from the analytic solution were also verified by comparing the measured and the simulated impedance spectrums. The difference in resonance and anti-resonance frequencies between the measured and simulated impedance spectrums was around 0.5% and 1.2%. By utilizing the analytic solutions in this study, it is possible to accurately derive full equivalent material coefficients of a 2-2 composite, which are essential for the development of acoustic sensors.

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Recent Advances in Underwater Signal Processing

Abstract: The ocean, covering 71% of the Earth’s surface, is integral to human life [...]

Cited by 2 publications

References 12 publications

Study of Short-term Longitudinal Profile and Sediment Dynamics of Ikpoba Reservoir

Study of Short-term Longitudinal Profile and Sediment Dynamics of Ikpoba Reservoir

Derivation of Equivalent Material Coefficients of 2-2 Piezoelectric Single Crystal Composite

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