Identify the spatially-correlated random fluctuating pressure on structure from strain data

The problem of classification of the realisation of the stationary univariate Gaussian random field into one of two populations with different means and different factorised covariance matrices is considered. In such a case optimal classification rule in the sense of minimum probability of misclassification is associated with non-linear (quadratic) discriminant function. Unknown means and the covariance matrices of the feature vector components are estimated from spatially correlated training samples using the maximum likelihood approach and assuming spatial correlations to be known. Explicit formula of Bayes error rate and the first-order asymptotic expansion of the expected error rate associated with quadratic plug-in discriminant function are presented. A set of numerical calculations for the spherical spatial correlation function is performed and two different spatial sampling designs are compared.

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Outage Performance of Multi-Hop Decouple-and-Forward Relaying in Spatially Correlated MIMO Channels

IEICE Transactions on Communications ◽

10.1587/transcom.e93.b.1298 ◽

2010 ◽

Vol E93-B (5) ◽

pp. 1298-1301 ◽

Cited By ~ 2

Author(s):

In-Ho LEE ◽

Joong-Hoo PARK ◽

Dongwoo KIM

Keyword(s):

Mimo Channels ◽

Outage Performance ◽

Spatially Correlated

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AUTOMATIC ESTIMATION OF SPATIALLY CORRELATED NOISE VARIANCE IN SPECTRAL DOMAIN FOR IMAGES

Telecommunications and Radio Engineering ◽

10.1615/telecomradeng.v73.i6.40 ◽

2014 ◽

Vol 73 (6) ◽

pp. 511-527 ◽

Cited By ~ 7

Author(s):

V.V. Abramova ◽

S. K. Abramov ◽

V. V. Lukin ◽

A. A. Roenko ◽

Benoit Vozel

Keyword(s):

Spectral Domain ◽

Correlated Noise ◽

Noise Variance ◽

Spatially Correlated ◽

Automatic Estimation ◽

Spatially Correlated Noise

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Experimental Characterization of Mechanical Behavior of Cord-Rubber Composites

Tire Science and Technology ◽

10.2346/1.2150974 ◽

1982 ◽

Vol 10 (1) ◽

pp. 37-54 ◽

Cited By ~ 11

Author(s):

M. Kumar ◽

C. W. Bert

Keyword(s):

Response Characteristic ◽

Cord Compression ◽

Complete Characterization ◽

Strain Response ◽

Strain Gages ◽

Experimental Characterization ◽

Rubber Composites ◽

Stress Strain ◽

Strain Data

Abstract Unidirectional cord-rubber specimens in the form of tensile coupons and sandwich beams were used. Using specimens with the cords oriented at 0°, 45°, and 90° to the loading direction and appropriate data reduction, we were able to obtain complete characterization for the in-plane stress-strain response of single-ply, unidirectional cord-rubber composites. All strains were measured by means of liquid mercury strain gages, for which the nonlinear strain response characteristic was obtained by calibration. Stress-strain data were obtained for the cases of both cord tension and cord compression. Materials investigated were aramid-rubber, polyester-rubber, and steel-rubber.

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Modeling of Contact Patch in Dual-Chamber Pneumatic Tires

Tire Science and Technology ◽

10.2346/tire.18.460202 ◽

2018 ◽

Vol 46 (2) ◽

pp. 78-92 ◽

Cited By ~ 2

Author(s):

A. I. Kubba ◽

G. J. Hall ◽

S. Varghese ◽

O. A. Olatunbosun ◽

C. J. Anthony

Keyword(s):

Strain Sensors ◽

Surface Strain ◽

Wireless Data ◽

Data Logger ◽

Dual Chamber ◽

Piezoelectric Polymer ◽

Pure Rolling ◽

Piezoelectric Elements ◽

Strain Data ◽

Deformation Patterns

ABSTRACT This study presents an investigation of the inner tire surface strain measurement by using piezoelectric polymer transducers adhered on the inner liner of the tire, acting as strain sensors in both conventional and dual-chamber tires. The piezoelectric elements generate electrical charges when strain is applied. The inner liner tire strain can be found from the generated charge. A wireless data logger was employed to measure and transmit the measured signals from the piezoelectric elements to a PC to store and display the readout signals in real time. The strain data can be used as a monitoring system to recognize tire-loading conditions (e.g., traction, braking, and cornering) in smart tire technology. Finite element simulations, using ABAQUS, were employed to estimate tire deformation patterns in both conventional and dual-chamber tires for pure rolling and steady-state cornering conditions for different inflation pressures to simulate on-road and off-road riding tire performances and to compare with the experimental results obtained from both the piezoelectric transducers and tire test rig.

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