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Beyond Binary Cutoffs: An Explainable Machine Learning Framework for Individualized Diagnostic Reasoning in Suspected Urolithiasis. [PDF]

Diagnostics (Basel)
Cha K, Oh SH, Shin J, Lim JY.
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Integrated gravity and gravity gradient 3D inversion using the non-linear conjugate gradient

Journal of Applied Geophysics, 2016
Abstract Gravity data, which are critical in mineral, oil, and gas exploration, are obtained from the vertical component of the gravity field, while gravity gradient data are measured from changes in the gravity field in three directions. However, few studies have sought to improve exploration techniques by integrating gravity and gravity gradient ...
Pengbo Qin, Danian Huang, Meixia Geng
exaly   +2 more sources

Joint Gravity and Gravity Gradient Inversion for Subsurface Object Detection

IEEE Geoscience and Remote Sensing Letters, 2013
A novel approach of joint gravity and gravity gradient inversion is presented for passive subsurface object detection in this letter. Gravity and gravity gradient anomalies induced by an object can be measured and inversed to estimate the mass, orientation, and distance of the object.
Lin Wu, Xiaoping Ke, Chengyi Xiong
exaly   +2 more sources

Gravity and gravity gradient changes caused by a point dislocation

Acta Seismologica Sinica, 1995
In this paper we studied gravitational potential, gravity and its gradient changes, which are caused by a point dislocation, and gave the concise mathematical deduction with definite physical implication in dealing with the singular integral at a seismic source.
Jian-Liang Huang, Hui Li, Rui-Hao Li
exaly   +2 more sources

Joint Inversion of Gravity and Gravity Gradient Data Based on Cross-Gradient Function

IEEE Sensors Journal
Qiang Lin, Zheng-Hao Shen, Peng Yuan
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Gravity gradient measurements

Proceedings of the 27th IEEE Conference on Decision and Control, 2003
It is shown that, for floated satellite gravity gradiometers subject to very low levels of unmodeled forces and torques, dynamic estimation can dramatically reduce rotation correction errors. The filter structure is developed, and the value of factorization techniques is examined.
D. Sonnabend, W.M. McEneaney
openaire   +1 more source

Modeling gravity gradient data for gravity gradient aided navigation system

2012 Third International Conference on Intelligent Control and Information Processing, 2012
Nowadays, a completely self contained, passive navigation system that relies on gravity gradient instrument for INS aiding within non-GNSS(Global Navigation Satellite System) environments has been widespread concern. In order to research this system, a high accuracy and resolution gravity gradient data is what you should first gain. This paper presents
Yandong Wang, Huafeng Hu, Shaoshuai Yang, Kui Chen, Qingchang Ji   +4 more
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Gravity gradient modeling using gravity and DEM

Journal of Geodesy, 2008
A model of the gravity gradient tensor at aircraft altitude is developed from the combination of ground gravity anomaly data and a digital elevation model. The gravity data are processed according to various operational solutions to the boundary-value problem (numerical integration of Stokes’ integral, radial-basis splines, and least-squares ...
Lizhi Zhu, Christopher Jekeli
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Improved nullification of gravity gradients

Physical Review D, 1987
A scheme due to Forward for canceling out gravity tides in a space laboratory is improved upon. It is shown how fourth-order terms in the potential can be eliminated by using eight masses instead of six. Even more economical compensation is obtained by using an ellipsoidal shell. The region of nullification then extends throughout the interior.
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