Model-based characterization of electromagnetic induction signatures obtained with the MTADS electromagnetic array

Barrow, Bruce; Nelson, H. H.

doi:10.1109/36.927450

Cited by 47 publications

(35 citation statements)

References 9 publications

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“…We extended this model from the triaxial, time-independent model of Barrow and Nelson (2001) and the axisymmetric, time-dependent model of Pasion and Oldenburg (2001) to a full triaxial, time-dependent representation. This model was used to infer target properties using multicomponent, multichannel time-domain electromagnetic signatures of 45 seeded objects were obtained using the Geonics EM61-3D.…”

Section: Discussionmentioning

confidence: 99%

Understanding and Predicting Changes in the Ocean Science, Technology, and Operations Workforce

Sullivan¹,

Murphree²

2007

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Section: Discussionmentioning

confidence: 99%

Understanding and Predicting Changes in the Ocean Science, Technology, and Operations Workforce

Sullivan¹,

Murphree²

2007

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“…F-test -1 is a sensitive test of the target's apparent cylindrical symmetry. Another measure of target symmetry is eccentricity, a parameterization described by Barrow, and others [5] and plotted along the x-axis of Figure 2.22's BOR Symmetry panel. NSR is a normalized measure of inversion residual size.…”

Section: )mentioning

confidence: 99%

“…Targets can be characterized by these physics-based model parameters [5,6,25]. Transient shape is influenced by target size, shape, conductivity, and magnetic permeability.…”

Section: Physics-based Target Modelingmentioning

confidence: 99%

“…al. [5] so that the dipole model considers the 4 dimensions (i.e., time and 3 vector components) of the data that we acquire. The two horizontal vector components provide additional independent data at each sample point and thereby eliminate the need to conduct surveys at either unrealistically close survey line spacings or, alternatively, to survey an area twice in orthogonal directions.…”

Section: Implications For Uxo Classificationmentioning

confidence: 99%

“…Magnetic measurements have the advantage of a better depth of investigation. On the other hand, even simple EMI methods can be used to estimate a target's size, symmetry properties, and aspect ratio [5,6]. More sophisticated EMI instruments that are able to measure the variation of the secondary electromagnetic fields produced by eddy currents and magnetic polarization induced in the buried targets, in principle at least, are able to further parameterize the target body and thus provide additional information for target classification.…”

Section: Introductionmentioning

confidence: 99%

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A Fast 4-D TEM System for UXO Characterization

Snyder¹

2004

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Detecting Changes in Water Quality Data

McKenna¹,

Wilson²,

Klise³

2008

Journal AWWA

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Timely deployment of contaminant warning systems requires on‐line sensors and advancement of data analysis and decision support systems to accurately detect water quality changes. As a demonstration of event detection in water quality data, three water quality change‐detection algorithms were developed and used to detect changes in water quality observed at four locations within a distribution system. Each data set was “spiked” with simulated anomalous water quality values of 1 h duration and 10 levels of spike strength. The receiver operating characteristic (ROC) curve is proposed as an objective means of assessing and comparing water quality change‐detection algorithm results that is also able to provide the tradeoff between missed detections and false alarms on a single plot. The area under the ROC curve provides a measure of the sensitivity and specificity of each algorithm for each spike strength and location. Resulting areas under the ROC curve range from 0.46 for spike strengths of 1.0 (background) to 0.98 for strengths of 3.5 standard deviations from the mean, where an ROC curve area of 1.0 indicates perfect detection.

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Model-based characterization of electromagnetic induction signatures obtained with the MTADS electromagnetic array

Cited by 47 publications

References 9 publications

Understanding and Predicting Changes in the Ocean Science, Technology, and Operations Workforce

Understanding and Predicting Changes in the Ocean Science, Technology, and Operations Workforce

A Fast 4-D TEM System for UXO Characterization

Detecting Changes in Water Quality Data

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