Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Guopeng Fan"'
Publikováno v:
Case Studies in Construction Materials, Vol 19, Iss , Pp e02527- (2023)
The modulus is a crucial material parameter reflecting stiffness characteristics of asphalt mixture in the elastic stage. Under specific conditions such as identical temperatures, loading velocities, and stress amplitudes, the moduli under the same s
Externí odkaz:
https://doaj.org/article/5dfe08f500c04876a6e413390c4b512b
Autor:
Lubin Qian, Sihao Liu, Guopeng Fan, Xinlong Liu, Hui Zhang, Yaohua Mei, Yuhui Xing, Zhiqiang Wang
Publikováno v:
Frontiers in Materials, Vol 10 (2023)
In this paper, a Wav2Vec2.0 neural network based on an attention mechanism is proposed to locate defects in array ultrasonic testing signals. This method does not require knowledge of the a priori condition of the sample sound velocity or the feature
Externí odkaz:
https://doaj.org/article/41ba5f5f6ebf4d5dab38fa7883d60901
Autor:
Guopeng Fan, Honglin Liu, Chaochao Liu, Yanhua Xue, Zihao Ju, Sha Ding, Yuling Zhang, Yuanbo Li
Publikováno v:
Materials, Vol 15, Iss 19, p 6788 (2022)
An increasing amount of waste seashells in China has caused serious environmental pollution and resource waste. This paper aims to solve these problems by using waste seashells as modified materials to prepare high-performance modified asphalt. In th
Externí odkaz:
https://doaj.org/article/eeeb4533be0845bbbbcefb4edbf48d6a
Autor:
Xingjie Chen, Wenfa Zhu, Guopeng Fan, Zaiwei Li, Wei Shao, Xiangzhen Meng, Liming Li, Haiyan Zhang
Publikováno v:
International Journal of Distributed Sensor Networks, Vol 16 (2020)
Void defects under track slabs are the main danger affecting the safe operation of high-speed railways. In the short high-speed railway maintenance periods, China’s high-speed railway line maintenance operations must quickly and dynamically determi
Externí odkaz:
https://doaj.org/article/68969936474d41bd9e198e3ff6f26215
Publikováno v:
Sensors, Vol 20, Iss 3, p 775 (2020)
This paper describes an imaging method for near-field defect detection in aluminum plates based on Green’s function recovery and application of instantaneous phase coherence weighting factors. The directly acquired acoustic information of near-fiel
Externí odkaz:
https://doaj.org/article/a532154e05e24c7d911952b5d3e3418c
Publikováno v:
Metals, Vol 9, Iss 8, p 868 (2019)
In this paper, phase coherence imaging is proposed to improve spatial resolution and signal-to-noise ratio (SNR) of near-surface defects in rails using cross-correlation of ultrasonic diffuse fields. The direct signals acquired by the phased array ar
Externí odkaz:
https://doaj.org/article/de3976b6ae7b4551913fd7abe8d7f538
Publikováno v:
Sensors, Vol 19, Iss 17, p 3744 (2019)
Wavenumber imaging with Green’s function reconstruction of ultrasonic diffuse fields is used to realize fast imaging of near-surface defects in rails. Ultrasonic phased array has been widely used in industries because of its high sensitivity and st
Externí odkaz:
https://doaj.org/article/0bdec0215d35490a8c87634349e85fcc
Publikováno v:
Materials, Vol 12, Iss 11, p 1788 (2019)
This paper aims to adopt the total focusing method (TFM) and wavenumber method for characterizing a delamination in ballastless slab track. Twelve dry point contact (DPC) transducers located at the upper surface of the slab track compose a linear arr
Externí odkaz:
https://doaj.org/article/216e00518114441ebc54555384523ba1
Publikováno v:
Metals, Vol 9, Iss 6, p 666 (2019)
Ultrasonic phased array is widely used for damage detection recently because of its high sensitivity and rapid scanning without sensor movements. However, the measured signal is always influenced by the remnants of the initial excitation and the nonl
Externí odkaz:
https://doaj.org/article/f2c352a25836486e95c2128aefc88519
Publikováno v:
Metals, Vol 9, Iss 5, p 503 (2019)
The ultrasonic phased array total focusing method (TFM) has the advantages of high imaging resolution and high sensitivity to small defects. However, it has a long imaging time and cannot realize near-distance defect imaging, which limits its applica
Externí odkaz:
https://doaj.org/article/4dbfc0477e8d4530bc780419e77a6666