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Hyun-Ju Oh, Jung-Hoon Park and Hyung-Choon Park
Pile foundations are used to support superstructures and play an important role in the safety of these structures. The performance of pile foundations generally depends on the conditions of the pile itself and the material under the pile tip(i.e., bottom...
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Pengfei Xing, Lixun Lu, Guobin Li, Xin Wang, Honglin Gao, Yuchao Song and Hongpeng Zhang
In order to identify the natural frequency of ship propulsion shafting under the running condition, a multi-method approach that combines Duffing Oscillator, harmonic wavelet packet transform, and probability density function is proposed. An experimental...
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Xueqin Jiang, Shanjun Luo, Qin Ye, Xican Li and Weihua Jiao
Soil is one of the most significant natural resources in the world, and its health is closely related to food security, ecological security, and water security. It is the basic task of soil environmental quality assessment to monitor the temporal and spa...
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Guishuo Wang, Xiaoli Wang and Chen Zhao
The current signal harmonic detection method(s) cannot reduce the errors in the analysis and extraction of mixed harmonics in the power grid. This paper designs a harmonic detection method based on discrete Fourier transform (DFT) and discrete wavelet tr...
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