Results 11 to 20 of about 74,643 (325)

Optimization of the Unambiguity of Cross-Correlated Ultrasonic Signals through Coded Excitation Sequences for Robust Time-of-Flight Measurements

open access: yesSignals, 2021
The cross-correlation function (CCF) is an established technique to calculate time-of-flight for ultrasonic signals. However, the quality of the CCF depends on the shape of the input signals. In many use cases, the CCF can exhibit secondary maxima in the
Marius Schäfer   +3 more
doaj   +1 more source

SS-SF: Piecewise 3D Scene Flow Estimation With Semantic Segmentation

open access: yesIEEE Access, 2021
In order to address the issue of edge-blurring and improve the accuracy and robustness of scene flow estimation under motion occlusions, we in this article propose a piecewise 3D scene flow estimation approach with semantic segmentation, named SS-SF ...
Cheng Feng   +5 more
doaj   +1 more source

Extended Non-Stationary Phase-Shift Migration for Ultrasonic Imaging of Irregular Surface Component

open access: yesIEEE Access, 2021
This paper introduces an extended non-stationary phase-shift migration (ENSPS) method for ultrasound imaging of irregular surface components. This method extends non-stationary phase-shift (NSPS) technology based on the classical B-scan data to full ...
Junjie Chang   +4 more
doaj   +1 more source

Mach-Zehnder Interferometer for High Temperature (1000 °C) Sensing Based on a Few-Mode Fiber

open access: yesPhotonic Sensors, 2020
A Mach-Zehnder interferometer (MZI) for high temperature (1000 °C) sensing based on few mode fiber (FMF) was proposed and experimentally demonstrated. The sensor was fabricated by fusing a section of FMF between two single-mode fibers (SMFs).
Juan Liu   +6 more
doaj   +1 more source

Large Displacement Optical Flow Estimation Based on Robust Interpolation of Sparse Correspondences

open access: yesIEEE Access, 2020
Recently, the interpolation of correspondences method has been widely used in optical flow estimation, because it produces an accurate flow field and costs little runtimes.
Shidong Shi   +5 more
doaj   +1 more source

LW-Net: A Lightweight Network for Monocular Depth Estimation

open access: yesIEEE Access, 2020
Existing self-supervised monocular depth estimation methods usually explore increasingly large networks to achieve accurate estimation results. However, larger networks are more difficult to train and require more storage space.
Cheng Feng   +5 more
doaj   +1 more source

Viscoelastic Evaluation of Composite Materials by Non-Contact Air Coupled Ultrasonic Transmission Method

open access: yesIEEE Access, 2021
The viscoelasticity of composite materials is one of the important mechanical properties to characterize the intrinsic damping mechanism, which is a crucial evaluation index for the safety performance of materials.
Junjie Chang   +4 more
doaj   +1 more source

Sub-Region Warranty Differential Pricing Optimization Strategy Based on Regional Granularity of Use Reliability

open access: yesIEEE Access, 2020
Despite the various advantages of existing warranty designs, these designs are still limited to inherent reliability and ignore the interaction between use reliability and regional difference. A new sub-region warranty differential pricing strategy based
Lilin Jie   +3 more
doaj   +1 more source

Characterization of Ancient Marquetry Using Different Non-Destructive Testing Techniques

open access: yesApplied Sciences, 2021
Non-destructive testing of objects and structures is a valuable tool, especially in cultural heritage where the preservation of the inspected sample is of vital importance.
Henrique Fernandes   +7 more
doaj   +1 more source

Intelligent recognition of acoustic emission signals from damage of glass fiber-reinforced plastics

open access: yesAdvanced Composites Letters, 2020
Glass fiber-reinforced plastics (GFRP) is widely used in many industrial fields. When acoustic emission (AE) technology is applied for dynamic monitoring, the interfering signals often affect the damage evaluation results, which significantly influences ...
Qiufeng Li   +5 more
doaj   +1 more source

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