Now showing items 31-40 of 51
Cramer- Rao Lower Bounds for Biased Image Reconstruction
(IEEE, 1993-08-16)
Since image reconstruction and restoration are ill-posed problems, unbiased estimators often have unacceptably high variance. To reduce the variance, one introduces constraints and smoothness penalties, which yields biased ...
On Complete-Data Spaces for PET Reconstruction Algorithms
(IEEE, 1993-08)
As investigators consider more comprehensive measurement models for emission tomography, there will be more choices for the complete-data spaces of the associated expectation-maximization algorithms for maximum-likelihood ...
On asymptotically reliable closed serial production lines
(Elsevier, 1993-02)
A problem of analysis and design of serial production lines, closed with respect to the number of carries available for parts transportation between operation , is formulated. An asymptotic solution is given for two ...
Crack determination from boundary measurements—Reconstruction using experimental data
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1993-09)
In this work we assess the effectiveness of Electrical Impedance Tomography for determining the presence and the location of an interior crack from boundary measurements. Electrical Impedance Tomography uses boundary ...
Numerical modeling of abrupt heterojunctions using a thermionic-field emission boundary condition
(Elsevier, 1993-03)
We present a numerical model in which the thermionic and tunneling mechanisms across an abrupt heterojunction interface are taken into account on the basis of the one dimensional drift-diffusion formulation. We use an ...
Parametric investigation of InGaAs/InAlAs HEMTs grown by CBE
(Elsevier, 1993-02-02)
The InAlAs/InGaAs high electron mobility transistor offers excellent high frequency, low noise operation for amplifiers. While this material system has been grown primarily by conventional MBE, other growth techniques have ...