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Marcelo V. Flamarion and Efim Pelinovsky
This study investigates the numerical evolution of an initially internal random wave field characterized by a Gaussian spectrum shape using the Benjamin?Ono (BO) equation. The research focuses on analyzing various properties associated with the random wa...
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Binghui Tang, Yuemin Wang, Ang Chen, Ruqing Gong and Yunwei Zhao
Pipeline systems are prone to defects due to the harsh service conditions, which may induce catastrophic failure if found not in time. Ultrasonic guided wave (UGW) testing provides a convenient option for pipeline detection, showing high-efficiency, non-...
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Shengqin Bian, Xinyu He, Zhengguang Xu and Lixin Zhang
Noise filtering is a crucial task in digital image processing, performing the function of preprocessing. In this paper, we propose an algorithm that employs deep convolution and soft thresholding iterative algorithms to extract and learn the features of ...
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Xianfeng Xu, Hao Wang, Hui Sheng, Weilong Luo and Xinwei Wang
A robust approach is designed to evaluate the reference tilt angle (RTA) accurately and efficiently by local Gaussian fitting (LGF) for the distribution of one frequency peak on a spatial spectrum plane (SSP). The novel method proposed can avoid enlargin...
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Xiaoji Li, Jiemei Huang and Leiming Sun
With the advancement of underwater communication technology, the traditional modulation dimension has been introduced, developed and utilized. In addition, orbital angular momentum (OAM) is utilized as the modulation dimension for optical underwater comm...
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Haiming Zhang, Aifeng Tao, Junhao Tu, Junwei Su and Shuya Xie
Intensive wave reflection occurs when the wavelengths of the incident waves and bottom undulations are in a 2:1 ratio. Existing studies have included the Bragg resonance phenomenon of waves passing over a continuous undulating bottom parallel to and obli...
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Xinguang Wang, Le Wang and Shengmei Zhao
Based on the extended Huygens?Fresnel principle and the power spectrum of anisotropic oceanic turbulence, the analytical expressions of the average intensity and coherence properties of an off-axis hollow Gaussian-Schell model (OAHGSM) vortex beam propag...
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Shuai Yao and Yinjia Liu
For tackling the challenge of in-time searching a sea-crashed plane, it is critical to develop a convenient and reliable detector for the underwater beacon signal. In the application of signal detection, a conventional detector such as linear correlation...
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Michel Riguidel
This article numerically analyzes the distribution of the zeros of Riemann?s zeta function along the critical line (CL). The zeros are distributed according to a hierarchical two-layered model, one deterministic, the other stochastic. Following a complex...
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Peter Sturrock and Felix Scholkmann
Standard (Lomb-Scargle, likelihood, etc.) procedures for power-spectrum analysis provide convenient estimates of the significance of any peak in a power spectrum, based?typically?on the assumption that the measurements being analyzed have a normal (i.e.,...
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