Cross-Spectrum Measurement Statistics: Uncertainties and Detection Limit
نویسندگان
چکیده
منابع مشابه
Attenuation measurement uncertainties caused by speckle statistics.
Attenuation measurements can be derived from the decay of backscattered signal with depth in an inhomogeneous material. In cases such as liver tissue, where many small inhomogeneities are likely to be included in sample volumes defined by pulse and beam widths, Rayleigh statistics describe the random nature of the magnitude of backscattered pressure. The statistics of speckle underlie the uncer...
متن کاملSensor Placement for Structural Damage Detection Considering Measurement Uncertainties
Structural damage detection methods using vibration measurements have been developed for decades. Measurement selections may affect damage detection results, because inevitable uncertainties are involved in vibration testing. A new sensor placement index is defined as the ratio of two parameters, namely, the contribution of measurement points to a Fisher information matrix, and the damage sensi...
متن کاملModelling uncertainties in limit state functions
• Ordering: pf ≤ p X 6 →Z f ≤ p R,X 6 →Z f and p S f ≤ p RS f ≤ p R,X 6 →Z f . • Strong independence: Complete information about the uncertain limit state function is needed. • Epistemic irrelevance: Sufficient to know q which condenses the uncertain limit state function. q could be a starting point for uncertainty modelling. • Random set independence: Possibility to combine upper probabilities...
متن کاملMeasurement Uncertainties in Wear Rates
Measurement uncertainties are vital to discussions of differences in measured values, yet they scarcely accompany discussions of wear and wear rates in the tribology literature. In this methods article, approaches to calculate uncertainties in single-point and steady-state wear rates are presented. The analysis includes analytical treatments of uncertainties for typical macroscopic tribology in...
متن کاملQuantum turbulent velocity statistics and quasiclassical limit.
Two research groups have measured turbulent velocity statistics in superfluid helium using different techniques. The results were in conflict: one experiment revealed Gaussian distributions (as observed in ordinary turbulence), the other experiment determined power laws. To solve the apparent puzzle, we numerically model quantum turbulence as a tangle of vortex filaments, and conclude that ther...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
سال: 2020
ISSN: 0885-3010,1525-8955
DOI: 10.1109/tuffc.2020.3005785