Browsing High Performance Computation for Engineered Systems (HPCES) by Title
Now showing items 1-20 of 87
-
Acceleration of Gas Bubble-Free Surface Interaction Computation Using Basis Preconditioners
(2002-01)The computation of gas bubble-free surface interaction entails a time-stepping algorithm whereby a linear system is solved at each time-iteration. In our investigation, the linear systems are derived from a desingularized ... -
Aerodynamic Shape Design of Nozzles Using a Hybrid Optimization Method
(2004-01)A hybrid design optimization method combining the stochastic method based on simultaneous perturbation stochastic approximation (SPSA) and the deterministic method of Broydon-Fletcher-Goldfarb-Shanno (BFGS) is developed ... -
Aerodynamic Shape Design of Transonic Airfoils Using Hybrid Optimization Techniques and CFD
(2003-01)This paper will analyze the effects of using hybrid optimization methods for optimizing objective functions that are determined by computational fluid dynamics solvers for compressible viscous flow for optimal design of ... -
An Algorithm for Computing the Symmetry Point of a Polytope
(2004-01)Given a closed convex set C and a point x in C, let sym(x,C) denote the symmetry value of x in C, which essentially measures how symmetric C is about the point x. Denote by sym(C) the largest value of sym(x,C) among all x ... -
Applications of Proper Orthogonal Decomposition for Inviscid Transonic Aerodynamics
(2003-01)Two extensions to the proper orthogonal decomposition (POD) technique are considered for steady transonic aerodynamic applications. The first is to couple the POD approach with a cubic spline interpolation procedure in ... -
Applications of Semidefinite Optimization in Stochastic Project Scheduling
(2002-01)We propose a new method, based on semidefinite optimization, to find tight upper bounds on the expected project completion time and expected project tardiness in a stochastic project scheduling environment, when only limited ... -
An Asymptotically Optimal On-Line Algorithm for Parallel Machine Scheduling
(2004-01)Jobs arriving over time must be non-preemptively processed on one of m parallel machines, each of which running at its own speed, so as to minimize a weighted sum of the job completion times. In this on-line environment, ... -
Automatic Generation of Geometrically Parameterized Reduced Order Models for Integrated Spiral RF-Inductors
(2004-01)In this paper we describe an approach to generating low-order models of spiral inductors that accurately capture the dependence on both frequency and geometry (width and spacing) parameters. The approach is based on adapting ... -
Bounds on Linear PDEs via Semidefinite Optimization
(2002-01)Using recent progress on moment problems, and their connections with semidefinite optimization, we present in this paper a new methodology based on semidefinite optimization, to obtain a hierarchy of upper and lower bounds ... -
Bubble Simulation Using Level Set-Boundary Element Method
(2003-01)In bubble dynamics, an underwater bubble may evolve from being singly-connected to being toroidal. Furthermore, two or more individual bubbles may merge to form a single large bubble. These dynamics involve significant ... -
Certified Rapid Solution of Parametrized Linear Elliptic Equations: Application to Parameter Estimation
(2005-01)We present a technique for the rapid and reliable evaluation of linear-functional output of elliptic partial differential equations with affine parameter dependence. The essential components are (i) rapidly uniformly ... -
Characterizing Scattering by 3-D Arbitrarily Shaped Homogeneous Dielectric Objects Using Fast Multipole Method
(2003-01)Electromagnetic scattering by 3-D arbitrarily shaped homogeneous dielectric objects is characterized. In the analysis, the method of moments is first employed to solve the combined field integral equation for scattering ... -
A Comparative Study on Optimization of Constrained Layer Damping for Vibration Control of Beams
(2003-01)This paper presents a comparison of optimization algorithms for constrained damping (CLD) patches’ layout to minimize the maximum vibration response of the odd modes, which constitutes the dominant acoustic radiation, of ... -
Competitive Multi-period Pricing with Fixed Inventories
(2004-01)This paper studies the problem of multi-period pricing for perishable products in a competitive (oligopolistic) market. We study non cooperative Nash equilibrium policies for sellers. At the beginning of the time horizon, ... -
Computing Bounds for Linear Functionals of Exact Weak Solutions to Poisson’s Equation
(2003-01)We present a method for Poisson’s equation that computes guaranteed upper and lower bounds for the values of linear functional outputs of the exact weak solution of the infinite dimensional continuum problem using traditional ... -
Computing Upper and Lower Bounds for the J-Integral in Two-Dimensional Linear Elasticity
(2004-01)We present an a-posteriori method for computing rigorous upper and lower bounds of the J-integral in two dimensional linear elasticity. The J-integral, which is typically expressed as a contour integral, is recast as a ... -
A Conservative Front Tracking Algorithm
(2005-01)The discontinuities in the solutions of systems of conservation laws are widely considered as one of the difficulties in numerical simulation. A numerical method is proposed for solving these partial differential equations ... -
A Constraint Handling Strategy for Bit-Array Representation GA in Structural Topology Optimization
(2004-01)In this study, an improved bit-array representation method for structural topology optimization using the Genetic Algorithm (GA) is proposed. The issue of representation degeneracy is fully addressed and the importance of ... -
Data Smoothing: Research 2002
(2003-01)My research is concentrated on applications of linear algebra in engineering, including wavelet analysis and structured matrices. This paper will appear in the book Mathematical Systems Theory (J. Rosenthal and D. Gilliam, ... -
Design and Analysis of Printed Circuit Boards Using FDTD Method for The 20-H Rule
(2002-01)With the increasing demand of higher operating frequencies for electronic circuits, the printed circuit board designers face more electromagnetic radiation problems than ever. Some “rules-of-thumb” are employed to help the ...
