Results 21 to 30 of about 40,688 (257)
An Optimal Shaped Sensor Array Derivation
Micromachines, 2023 In Structural Health Monitoring (SHM) applications, the Direction of Arrival (DoA) estimation of Guided Waves (GW) on sensor arrays is often used as a fundamental means to locate Acoustic Sources (AS) generated by damages growth or undesired impacts in ...
Marco Dibiase, Luca De Marchi
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Autostereoscopic 3D Measurement Based on Adaptive Focus Volume Aggregation
Sensors, 2023 Autostereoscopic three-dimensional measuring systems are a kind of portable and fast precision metrology instrument. The systems are based on integral imaging that makes use of a micro-lens array before an image sensor to observe measured parts from ...
Sanshan Gao, Chi Fai Cheung
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IEEE Access, 2023 The monitoring of displacement and strain distribution of vibrating structures is very important for maintaining structural safety. In this paper, a monitoring method of structural vibration deformation based on Fiber Bragg Grating (FBG) strainmeter ...
Ziyue Zhao +3 more
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Honey bees communicate distance via non-linear waggle duration functions [PDF]
PeerJ, 2021 Honey bees (genus Apis) can communicate the approximate location of a resource to their nestmates via the waggle dance. The distance to a goal is encoded by the duration of the waggle phase of the dance, but the precise shape of this distance-duration ...
Patrick L. Kohl, Benjamin Rutschmann
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Thermos Array: Two-Dimensional Sparse Array with Reduced Mutual Coupling
International Journal of Antennas and Propagation, 2018 Sparse planar arrays, such as the billboard array, the open box array, and the two-dimensional nested array, have drawn lots of interest owing to their ability of two-dimensional angle estimation.
Lei Sun, Minglei Yang, Baixiao Chen
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Travel-time correction and preliminary results for ocean acoustic tomography in South China Sea [PDF]
MATEC Web of Conferences, 2019 An acoustic tomography trial experiment was conducted in South China Sea during May to August in 2016. Two moorings are installed apart from about 56.94 km, while each consists of one low frequency source, 20 hydrophones deployed from the depth of about ...
Ji Xingyu, Zhao Hangfang
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Remote Sensing, 2021 To acquire the enhanced underwater ship-radiated noise signal in the presence of array shape distortion in a passive sonar system, the phase difference of the line-spectrum component in ship-radiated noise is often exploited to estimate the time-delay ...
Chuanqi Zhu +5 more
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Bayesian Fusion Based Robust Array Shape Estimation for Distorted Towed Hydrophone Array
Journal of Marine Science and EngineeringTowed hydrophone arrays are widely employed for underwater target detection and direction-of-arrival (DOA) estimation. However, array shape distortion induced by ocean currents, internal waves, and platform maneuvers severely degrades beamforming ...
Chuanqi Zhu +3 more
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Rapid fluorescent mapping of electrochemically induced local pH changes
Advanced Sensor and Energy Materials, 2022 We present a fluorescent microscopic method using an ultra-pH-sensitive polymeric probe to rapidly map within subsecond the pH distribution resulting from oxygen reduction reaction electrocatalysed by an array of platinum nanoparticles.
Jia Gao +4 more
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Machine Learning Technique Using the Signature Method for Automated Quality Control of Argo Profiles
Earth and Space Science, 2020 A profile from the Argo ocean observation array is a sequence of three‐dimensional vectors composed of pressure, salinity, and temperature, appearing as a continuous curve in three‐dimensional space. The shape of this curve is faithfully represented by a
Nozomi Sugiura, Shigeki Hosoda
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