A novel background subtraction method for Doppler-shift attenuation and angular correlation measurements with large multi-detector HpGe arrays is presented.
We found that the dip frequency shift, transmittance attenuation of the dip frequency, and peak shift of the derivative spectrum of the phase shift depend on the bonding amount of lectin sugar interactions.
Tests were performed by using a winch-operated slug (submerged solid cylinder) to create a periodic head disturbance in one well and observing the phase shift and attenuation of the head response in the remaining wells.
We consider that the light rays propagate straight through the sample and accumulate a phase shift and attenuation corresponding to properties of the regions they went through.
The commonly used FD multi-distance (FD-MD) method takes advantage of the phase shift and attenuation of modulated light at several distances to retrieve the baseline optical properties of the medium assumed homogeneous [ 18].
The elastic foundation shifts the attenuation zones to higher frequencies and narrows the width of the attenuation zones.
The theoretical results illustrate that the compressive initial stress shifts the attenuation zones to a lower frequency range.
The results show that the compressive initial stress shifts the attenuation zones to lower frequencies and enhances the attenuation of waves in the attenuation zones, while the tensile initial stress shifts the attenuation zones to higher frequencies and weakens the attenuation of waves in the attenuation zones.
The largest NRMSDs caused by combined rotation, shifts and attenuation coefficient errors were 6.3%, 3.0%, 2.5% and 2.3% for 125I, 201Tl, 99mTc and 111In, respectively.
However, special attention to technical details is necessary, especially to possible misregistration artefacts, which may present as shifts between attenuation correction and the PET images [ 58].
Joint 2D inversion of phase shifts and attenuations improves the reliability of the inferred spatial conductivity distribution and allows estimating permittivity.
