Results 21 to 30 of about 121,008,133 (297)

Broadband Ultrasonic Location Systems for Improved Indoor Positioning [PDF]

, 2006
Ultrasonic location systems are a popular solution for the provision of fine-grained indoor positioning data. Applications include enhanced routing for wireless networks, computer-aided navigation, and location-sensitive device behavior. However, current
Hopper, Andy, Hazas, Michael
core   +4 more sources

Intelligent damage recognition of composite materials based on deep learning and ultrasonic testing

AIP Advances, 2021
Ultrasonic non-destructive testing can effectively detect damage in aircraft composite materials, but traditional manual testing is time-consuming and labor-intensive.
Caizhi Li, Weifeng He, Xiangfan Nie, Xiaolong Wei, Hanyi Guo, Xin Wu, Haojun Xu, Tiejun Zhang, Xinyu Liu   +8 more
doaj   +1 more source

Sub-Nanowatt Ultrasonic Bio-Telemetry Using B-Scan Imaging

IEEE Open Journal of Engineering in Medicine and Biology, 2021
Goal: The objective of this paper is to investigate if the use of a B-scan ultrasound imaging system can reduce the energy requirements, and hence the power-dissipation requirements to support wireless bio-telemetry at an implantable device.
Sri Harsha Kondapalli, Shantanu Chakrabartty   +1 more
doaj   +1 more source

A Defect Detection Method for Rail Ultrasonic B-Scan Images Based on a Multi-Scale Dense Attention Network

Applied Sciences
Rail internal defects pose significant threats to railway operational safety, and ultrasonic B-scan imaging provides an effective nondestructive testing approach for visualizing subsurface rail conditions.
Guanlin Zhang, Ping Wang, Fan Guo, Nan Li   +3 more
doaj   +1 more source

Fully Convolutional Neural Network With GRU for 3D Braided Composite Material Flaw Detection

IEEE Access, 2019
Automated ultrasonic signal classification systems are often utilized for the recognition of a large number of ultrasonic signals in engineering materials.
Yongmin Guo, Zhitao Xiao, Lei Geng, Jun Wu, Fang Zhang, Yanbei Liu, Wen Wang   +6 more
doaj   +1 more source

Ultrasonic Tomography Study of Metal Defect Detection in Lithium-Ion Battery

Frontiers in Energy Research, 2021
Lithium-ion batteries are widely used in electric vehicles and energy storage systems. Sudden fire accident is one of the most serious issue, which is mainly caused by unpredicted internal short circuit.
Mengchao Yi, Mengchao Yi, Fachao Jiang, Languang Lu, Sixuan Hou, Jianqiao Ren, Xuebing Han, Lili Huang   +7 more
doaj   +1 more source

Ultrasonic distance sensor improvement using a two-level neural network [PDF]

, 1995
This paper discusses the performance improvement that a neural network can provide to a contactless distance sensor based on the measurement of the time of flight (TOF) of an ultrasonic (US) pulse.
Ferraris, Franco, U. Grimaldi, A. Carullo, GRIMALDI U., Graziani, S., S. Graziani, Parvis, Marco, Graziani S, Grimaldi U, Carullo, Alessio, GRAZIANI S., M. Parvis, Grimaldi, U., F. Ferraris, Carullo A, Parvis P., GRAZIANI, Salvatore, Ferraris F   +17 more
core   +1 more source

Study on Denoising Method of Weld Defect Signal Based on SSA-VMD-WPD

Applied Sciences
Defects in welds can affect the structural safety and reliability of workpieces. Currently, the method of using phased array ultrasonic inspection technology for non-destructive testing of weld structures with high detection efficiency, good sensitivity,
Xiangqing Chen, Sifan Gong, Wei Pan, Youqing Kang, Weili Gong   +4 more
doaj   +1 more source

Functional comparison of EncB and EncC cargo proteins in iron storage within the Myxococcus xanthus encapsulin

FEBS Letters, EarlyView.
Encapsulins are protein nanocompartments that play an important role in iron storage. In the Myxococcus xanthus encapsulin system, two cargo proteins called EncB and EncC contribute to iron mineralization. Here, we show that EncB and EncC generate iron‐containing minerals with distinct chemical compositions, suggesting that the composition of stored ...
Harry B. McDowell, Thomas Walther, Egbert Hoiczyk   +2 more
wiley   +1 more source

Preoperative circulating tumor cells integrated with imaging analysis for prognostic evaluation in head and neck squamous cell carcinoma

Molecular Oncology, EarlyView.
Detecting circulating tumor cells (CTCs) in blood before surgery may help predict outcomes in patients with head and neck squamous cell carcinoma (HNSCC). Here, we show when combined with tumor size and lymph node involvement from routine imaging, CTC status identifies high‐risk patients with poorer survival—offering a simple, minimally invasive tool ...
Susanne Flach, Gizem Abaci, Tom Huberty, Axel Lechner, Lukas Käsmann, Jens Ricke, Sophia Stöcklein, Martin Canis, Philipp Baumeister, Marianna Alunni‐Fabbroni   +9 more
wiley   +1 more source