Results 21 to 30 of about 86,617 (302)

Three-Dimensional Separate and Joint Inversions of Multi-Component Frequency-Domain Airborne Electromagnetic Data: Synthetic Model Studies

Sensors, 2023
Airborne electromagnetic (AEM) surveys using airborne mobile platforms enable rapid and efficient exploration of areas where groundwork is difficult. They have been widely used in fields such as shallow resource exploration and environmental engineering.
Jun Yang, Xin Huang, Liangjun Yan, Xiaoyue Cao   +3 more
doaj   +1 more source

Three-dimensional joint inversion of traveltime and gravity data across the Chicxulub impact crater

, 2009
In 2005 an extensive new seismic refraction data set was acquired over the central part of the Chicxulub impact crater, allowing us to image its structure with much better resolution than before.
Morgan, J. V., Christeson, G.L., Vermeesch, P. M., Morgan, J.V., Surendra, A., Christeson, G. L., Barton, P.J., Vermeesch, P.M., Barton, P. J.   +8 more
core   +1 more source

Addressing Constraint Robustness to Torque Errors in Task-Space Inverse Dynamics

Robotics: Science and Systems XI, 2015
Task-Space Inverse Dynamics (TSID) is a well-known optimization-based technique for the control of highly-redundant mechanical systems, such as humanoid robots. One of its main flaws is that it does not take into account any of the uncertainties affecting these systems: poor torque tracking, sensor noises, delays and model uncertainties.
del Prete, Andrea, Mansard, Nicolas
openaire   +3 more sources

Inverse-designed photon extractors for optically addressable defect qubits

Optica, 2020
Solid-state defect qubit systems with spin-photon interfaces show great promise for quantum information and metrology applications. Photon collection efficiency, however, presents a major challenge for defect qubits in high refractive index host materials.
Srivatsa Chakravarthi, Pengning Chao, Christian Pederson, Sean Molesky, Andrew Ivanov, Karine Hestroffer, Fariba Hatami, Alejandro W. Rodriguez, Kai-Mei C. Fu   +8 more
openaire   +2 more sources

Addressing Discontinuous Root-Finding for Subsequent Differentiability in Machine Learning, Inverse Problems, and Control

Journal of Computational Physics, 2023
There are many physical processes that have inherent discontinuities in their mathematical formulations. This paper is motivated by the specific case of collisions between two rigid or deformable bodies and the intrinsic nature of that discontinuity. The impulse response to a collision is discontinuous with the lack of any response when no collision ...
Daniel Johnson, Ronald Fedkiw
openaire   +3 more sources

Addressing viscous effects in acoustic full-waveform inversion

GEOPHYSICS, 2018
In conventional full-waveform inversion (FWI), viscous effects are typically neglected, and this is likely to adversely affect the recovery of P-wave velocity. We have developed a strategy to mitigate viscous effects based on the use of matching filters with the aim of improving the performance of acoustic FWI.
Òscar Calderón Agudo, Nuno Vieira da Silva, Michael Warner, Tatiana Kalinicheva, Joanna Morgan   +4 more
openaire   +2 more sources

A back propagation neural network-based approach for inverting layered seabed acoustic parameters in shallow waters

Frontiers in Marine Science
IntroductionExisting methods primarily focus on earth acoustic parameters inversion under specific layered structures. However, they face challenges with experimental data from unknown seabed stratification, hindering accurate parameter inversion ...
Jiahui Wang, Zhiqiang Cui, Hanhao Zhu, Lei Meng, Weihua Song, Xu Liu   +5 more
doaj   +1 more source

A robust array geometry inversion method for a deep-towed multichannel seismic system with a complex seafloor

Frontiers in Marine Science, 2023
Deep-towed multichannel seismic exploration technology has better applicability and more development potential when utilized to invert the geoacoustic properties of deep-sea sediment.
Jing Li, Jing Li, Jing Li, Yanliang Pei, Yanliang Pei, Yanliang Pei, Chenguang Liu, Chenguang Liu, Chenguang Liu, Liancheng Zhang, Xiaohu Luo, Xiaohu Luo, Xiaohu Luo, Kai Liu, Kai Liu, Kai Liu, Weilu Li   +16 more
doaj   +1 more source

Valosin‐containing protein counteracts ATP‐driven dissolution of FUS condensates through its ATPase activity in vitro

FEBS Letters, EarlyView.
Biomolecular condensates formed by fused in sarcoma (FUS) are dissolved by high ATP concentrations yet persist in cells. Using a reconstituted system, we demonstrate that valosin‐containing protein (VCP), an AAA+ ATPase, counteracts ATP‐driven dissolution of FUS condensates through its D2 ATPase activity.
Hitomi Kimura, Shin‐ichi Tate, Kyota Yasuda   +2 more
wiley   +1 more source

Reconstructing enzyme evolution by protein engineering

FEBS Letters, EarlyView.
Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler, Markus R. Busch, Reinhard Sterner   +2 more
wiley   +1 more source