Three-dimensional ionospheric tomography via band-limited constrained iterative cross-entropy minimization

Group-Wise Cortical Correspondence via Sulcal Curve-Constrained Entropy Minimization

We present a novel cortical correspondence method employing group-wise registration in a spherical parametrization space for the use in local cortical thickness analysis in human and non-human primate neuroimaging studies. The proposed method is unbiased registration that estimates a continuous smooth deformation field into an unbiased average space via sulcal curve-constrained entropy minimiza...

Thrust - Limited Optimal Three - Dimensional Spacecraft Trajectories

Several optimal three-dimensional orbital transfer problems are solved for thrust-limited spacecrafts using collocation and nonlinear programming techniques. The solutions for full nonlinear equations of motion are obtained where the integrals of the free Keplerian motion in three dimensions are utilized for coasting arcs. In order to limit the solution space, interior-point constraints are use...

Constrained via minimization

We show that the general two layer constrained via minimization problem and the three layer constrained via minimization problem for HVH topologies are NP-hard. A backtracking and a heuristic algorithm for the three layer HVH constrained via minimization problem are proposed. The backtracking algorithm can also be used for three layer non HVH problems. Experimental results indicate that our heu...

Properties of cross-entropy minimization

Investigation of iterative image reconstruction in three-dimensional optoacoustic tomography.

Iterative image reconstruction algorithms for optoacoustic tomography (OAT), also known as photoacoustic tomography, have the ability to improve image quality over analytic algorithms due to their ability to incorporate accurate models of the imaging physics, instrument response and measurement noise. However, to date, there have been few reported attempts to employ advanced iterative image rec...