详情

原文传递 Compressive Sensing-Based Reconstruction of Sea Free-Surface Elevation on a Vertical Wall

题名：	Compressive Sensing-Based Reconstruction of Sea Free-Surface Elevation on a Vertical Wall
其他题名：	Baquerizo,A.,and M.A.Losada.1995."Transfer function between wave height and wave pressure for progressive waves,by Y.-Y.Kuo and J.-F.Chiu:Comments."Coastal Eng.24(3):351-353.https://doi.org/10.1016/0378-3839(94)00038-Y.
正文语种：	英文
作者：	Valentina Laface
关键词：	Compressive sensing;Vertical wall;Measurement;Constrained optimization;Extreme waves
摘要：	Measuring the free-surface displacement on a vertical wall of a marine structure is not a trivial problem. In this context, the efficacy of ultrasonic probes is affected by the interaction between the signal emitted by the sensor and the vertical wall, whereas image-based techniques are computationally demanding, especially if long-time series are utilized. Considering these difficulties, this paper proposes a novel approach for measuring the sea surface elevation on vertical breakwaters. The proposed methodology involves the use of pressure measurements and a reconstruction algorithm based on a compressive sensing (CS) technique in conjunction with a generalized harmonic wavelet (GHW) basis. In particular, a constrained CS optimization approach is proposed by utilizing the known values of the free-surface data to reconstruct all other missing data while adhering at the same time to prescribed upper and lower bounds at all time instants. The reliability of the methodology was assessed against field data pertaining to a vertical wall equipped with pressure transducers recorded at the Natural Ocean Engineering Laboratory of Reggio Calabria. It was shown that direct application of an unconstrained GHW-based CS optimization approach yielded physically inconsistent minima and maxima values; thus, it was inadequate for reliably reconstructing the free surface. These drawbacks were removed by the constrained GHW-based CS. Furthermore, examination of the reconstructed sea surface profiles in the vicinity of extremely high wave crests or wave troughs showed that they are in agreement with pertinent theoretical data obtained by using the nonlinear quasi-determinism theory.
出版年：	2018
论文唯一标识：	P-108Y2018V144N05003
英文栏目名称：	TECHNICAL PAPERS
doi：	10.1061/(ASCE)WW.1943-5460.0000452
期刊名称：	Journal of Waterway, Port, Coastal, and Ocean Engineering
拼音刊名(出版物代码)：	P-108
卷：	144
期：	05
页码：	14-24