The objective of this paper is to control the phase shifting by applying a bias DC voltage and changing the mechanical characteristics in electrostatically-actuated micro-beams. This problem can be more useful in the design of micro-phase shifters, which has not generally been investigated their mechanical behavior. By presenting a mathematical modeling, Galerkin-based step by step linearizatio...

Backprojection filtering algorithms are presented for three variable orbit fan-beam geometries. Expressions for the fanbeam projection and backprojection operators are given for a flat detector fan-beam geometry with fixed focal length, with variable focal length, and with fixed focal length and off-center focusing. Backprojection operators are derived for each geometry using transformation of ...

This paper suggests an optimization-based methodology for the design of minimum weight structures with kinematic nonlinear behavior. Attention is focused on three-dimensional reticulated structures idealized with beam elements under proportional static loadings. The algorithm used for optimization is based on a classical optimality criterion approach using an active-set strategy for extreme lim...

In this work we present a beam-search approach applied to the Set Covering Problem. The goal of this problem is to choose a subset of columns of minimal cost covering every row. Beam Search constructs a search tree by using a breadthfirst search strategy, however only a fixed number of nodes are kept and the rest are discarded. Even though original beam search has a deterministic nature, our pr...

A primary challenge in acoustic modeling is computation of reverberation paths from sound sources fast enough for real-time auralization. This paper describes a beam tracing method based on precomputed spatial subdivision and “beam tree” data structures that enables real-time acoustic modeling and auralization for sound sources at fixed locations in interactive virtual environment applications....

Improved efficiency of pruning accelerates the search process and leads to a more time efficient speech recognition system. The goal of this work was to develop a new pruning technique which optimizes the well known probability-based pruning (beam width) by utilization of confidence measurement. We use normalized hypotheses scores to guide the beam width of the pruning process dynamically frame...

A single arm Msller polarimeter used to measure the longitudinal beam polarization of the 48GeV electron beam for SLAC fixed target experiment E-154 is described. The polarimeter utilizes an array of silicon strip detectors and a dipole magnetic spectrometer to detect Msller scattered electrons from magnetized Fe-Co alloy target foils. The details of the foil pol~ization measu~ments and analysi...