Depth Limits in Body Wave Inversions [PDF]
Geophysical Journal International, 1972 Summary The Wiechert-Herglotz integral provides a direct means of calculating a seismic velocity-depth (v-d) curve from a continuous ray parameter-distance (p-Δ) curve. There is a straightforward method by which this approach can be extended to determine a velocity-depth envelope for any set of T - Δ or p - Δ data.
G. A. McMechan, R. A. Wiggins
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A simple but efficient non-linear method for 2D inversion of magnetic field data based on Ridge-Regression algorithm [PDF]
International Journal of Mining and Geo-Engineering, 2021 In geophysical exploration, inversion is carried out on the observed data to generate a geophysical model, approximating the subsurface geological structure.
Ali Moradzadeh +3 more
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Avoiding negative depth in inverse depth bearing-only SLAM [PDF]
2008 IEEE/RSJ International Conference on Intelligent Robots and Systems, 2008 In this paper we consider ways to alleviate negative estimated depth for the inverse depth parameterisation of bearing-only SLAM. This problem, which can arise even if the beacons are far from the platform, can cause catastrophic failure of the filter.We consider three strategies to overcome this difficulty: applying inequality constraints, the use of ...
M.P. Parsley, S.J. Julier
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A Convolutional Neural Network with Spatial Location Integration for Nearshore Water Depth Inversion
Sensors, 2023 Nearshore water depth plays a crucial role in scientific research, navigation management, coastal zone protection, and coastal disaster mitigation. This study aims to address the challenge of insufficient feature extraction from remote sensing data in ...
Chunlong He +3 more
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Nonlinear Phase Speeds and Depth Inversions [PDF]
Coastal Dynamics 2005, 2006 Experiments were conducted in a laboratory facility under with a fixed bathymetric profile containing a single bar. A hybrid data set was collected consisting of remotely sensed wave data combined with modelgenerated wave amplitude profiles. The data is used to test the improvements in depth retrieval through the use of a nonlinear composite dispersion
Patricio Catalán, Merrick C. Haller
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Inverse Designed Metalenses with Extended Depth of Focus [PDF]
ACS Photonics, 2020 We design, fabricate and characterize a cylindrical metasurface lens operating at — 625nm with a depth of focus exceeding that of an ordinary lens using adjoint optimization-based inverse electromagnetic design.
Elyas Bayati +5 more
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Depth Inversion from Wave Frequencies in Temporally Augmented Satellite Video
Remote Sensing, 2022 Optical satellite images of the nearshore water surface offer the possibility to invert water depths and thereby constitute the underlying bathymetry.
Matthijs Gawehn +4 more
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Uncertainties and shortcomings of ground surface temperature histories derived from inversion of temperature logs [PDF]
, 2005 Analysing borehole temperature data in terms of ground surface history can add useful information to reconstructions of past climates. Therefore, a rigorous assessment of uncertainties and error sources is a necessary prerequisite for the meaningful ...
Hartmann, Andreas, Rath, Volker
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Non-inversion conservation tillage as an underestimated driver of tillage erosion
Scientific Reports, 2022 Tillage erosion is a widely underestimated process initiating soil degradation especially in case of large agricultural fields located in rolling topography.
L. K. Öttl +4 more
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Monitoring Specified Depth Soil Moisture in Field Scale with Ground Penetrating Radar
智慧农业, 2022 Ground-penetrating radar (GPR) is one of the emerging technologies for soil moisture measurement. However, the measurement accuracy is difficult to determine due to some influence factors including radar wave frequency, soil texture type, etc.
ZHANG Wenhan +6 more
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