Browsing by Keywords "Computational geometry"
Now showing items 1-17 of 17
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Analytical evaluation of the MoM matrix elements
(Institute of Electrical and Electronics Engineers, 1996-04)Derivation of the closed-form Green's functions has eliminated the computationally expensive evaluation of the Sommerfeld integrals to obtain the Green's functions in the spatial domain. Therefore, using the closed-form ... -
Animation of boiling phenomena
(IEEE, 2008-05)Phenomenon of boiling is a challenging topic for computer graphics due to its complex hydrodynamics and formulation. Realistic fluid animations require very heavy three-dimensional fluid flow calculations, and surface ... -
An approximation algorithm for computing the visibility region of a point on a terrain and visibility testing
(IEEE, 2014-01)Given a terrain and a query point p on or above it, we want to count the number of triangles of terrain that are visible from p. We present an approximation algorithm to solve this problem. We implement the algorithm and ... -
Continuous knapsack sets with divisible capacities
(Springer, 2016)We study two continuous knapsack sets (Formula presented.) and (Formula presented.) with (Formula presented.) integer, one unbounded continuous and (Formula presented.) bounded continuous variables in either (Formula ... -
An efficient method for electromagnetic characterization of 2-D geometries in stratified media
(IEEE, 2002)A numerically efficient technique, based on the spectral-domain method of moments (MoM) in conjunction with the generalized pencil-of-functions (GPOF) method, is developed for the characterization of two-dimensional ... -
Finite element modeling of micro-particle separation using ultrasonic standing waves
(ASME, 2014)Acoustophoresis which means separation of particles and cells using acoustic waves is becoming an intensive research subject. The method is based on inducing an ultrasonic compression standing wave inside a microchannel. ... -
Iterative solution of the normal-equations form of the electric-field integral equation
(IEEE, 2007)In this paper, we show that transforming the original equations into normal equations improves the convergence of EFIE significantly. We present the solutions of EFIE by employing the least-squares QR (LSQR) algorithm, ... -
Lattice dynamics and elastic properties of lanthanum monopnictides
(2008)In this study, first principles calculation results of the second order elastic constants and lattice dynamics of two lanthanum monopnictides, LaN and LaBi, which crystallize in rock-salt structure (B1 phase), are presented. ... -
Multi-level direct K-way hypergraph partitioning with multiple constraints and fixed vertices
(Academic Press, 2008-05)K-way hypergraph partitioning has an ever-growing use in parallelization of scientific computing applications. We claim that hypergraph partitioning with multiple constraints and fixed vertices should be implemented using ... -
On the accuracy of MFIE and CFIE in the solution of large electromagnetic scattering problems
(ESA Publications, 2006)We present the linear-linear (LL) basis functions to improve the accuracy of the magnetic-field integral equation (MFIE) and the combined-field integral equation (CFIE) for three-dimensional electromagnetic scattering ... -
Radius of curvature estimation and localization of targets using multiple sonar sensors
(A I P Publishing LLC, 1999-04)Acoustic sensors have been widely used in time-of-flight ranging systems since they are inexpensive and convenient to use. One of the most important limitations of these sensors is their low angular resolution. To improve ... -
Simultaneous extraction of geometry and surface properties of targets using infrared intensity signals
(IEEE, 2005)We propose the use of angular intensity signals obtained with low-cost infrared sensors and present an algorithm to simultaneously extract the geometry and surface properties of commonly encountered targets in indoor ... -
Solutions of large integral-equation problems with preconditioned MLFMA
(IEEE, 2007)We report the solution of the largest integral-equation problems in computational electromagnetics. We consider matrix equations obtained from the discretization of the integral-equation formulations that are solved ... -
The splittable flow arc set with capacity and minimum load constraints
(Elsevier, 2013)We study the convex hull of the splittable flow arc set with capacity and minimum load constraints. This set arises as a relaxation of problems where clients have demand for a resource that can be installed in integer ... -
A synthetic aperture imaging system using surface wave modes
(IEEE, 1995)A synthetic aperture acoustic imaging system with a novel inversion algorithm is described. Data is obtained by using a transducer insonifying the sample surface at a critical angle which is excited by a short electrical ... -
Target classification with simple infrared sensors using artificial neural networks
(IEEE, 2008-10)This study investigates the use of low-cost infrared (IR) sensors for the determination of geometry and surface properties of commonly encountered features or targets in indoor environments, such as planes, corners, edges, ... -
Walkthrough in complex environments at interactive rates using level-of-detail
(TÜBİTAK, 2002)One of the biggest problems in computer graphics is displaying huge geometric models at interactive rates. A lot of work has been done to achieve the required frame-rates in architecture, simulation, computer-aided design ...
