Browsing by Keywords "Boundary conditions"
Now showing items 2139 of 39

Nonlinear PDE control of twolink flexible arm with nonuniform cross section
(IEEE, 200606)A twolink flexible arm with nonuniform or variable crosssection by design will be considered based on an exact PDE model with boundary conditions. In this research, the nonlinear controller is used to achieve setpoint ... 
On the errors arising in surface integral equations due to the discretization of the identity operator
(IEEE, 2009)Surface integral equations (SIEs) are commonly used to formulate scattering and radiation problems involving threedimensional metallic and homogeneous dielectric objects with arbitrary shapes. For numerical solutions, ... 
On the optimality of the window method in computational homogenization
(2013)The window method, where the microstructural sample is embedded into a frame of a homogeneous material, offers an alternative to classical boundary conditions in computational homogenization. Experience with the window ... 
Phonon confinement and screening effects on the polaron energy in quantum wires
(Institute of Physics Publishing Ltd., 1995)We study the contribution of confined phonons to the polaron energy in quantumwell wires. We use a dispersionless, macroscopic continuum model to describe the phonon confinement in quantum wires of square cross section. ... 
Proper orthogonal decomposition for reduced order modeling: 2D heat flow
(IEEE, 200306)Modeling issues of infinite dimensional systems is studied in this paper. Although the modeling problem has been solved to some extent, use of decomposition techniques still pose several difficulties. A prime one of this ... 
Quantitative comparison of rooftop and RWG basis functions
(IEEE, 199707)The `rooftops' (RT) basis functions (BFs) are well suited for the modeling of geometries that conform to Cartesian coordinates, whereas the Rao, Wilton, and Glisson subdomains (RWG) BFs are capable of modeling flatfaceted ... 
Sequential and parallel preconditioners for largescale integralequation problems
(IEEE, 2007)For efficient solutions of integralequation methods via the multilevel fast multipole algorithm (MLFMA), effective preconditioners are required. In this paper we review appropriate preconditioners that have been used for ... 
Simulation of TRTconfigured groundpenetrating radars over heterogeneous grounds
(IEEE, 2001)The simulation of transmitterrecievertransmitter (TRT) configured groundpenetrating radars over heterogeneous grounds was discussed. The finitedifference timedomain (FDTD) methods along with the perfectlymatched layer ... 
Smart radome improves reflector antenna directivity
(IEEE, 1997)A numerical optimization procedure is applied to two dimensional model of cylindrical reflector antenna arbitrarily located inside a circular cylindrical dielectric radome. If the radome thickness has been optimized, then ... 
Solutions of electromagnetics problems involving hundreds of millions of unknowns with parallel multilevel fast multipole algorithmt
(IEEE, 200906)We present the solution of extremely large electromagnetics problems formulated with surface integral equations (SIEs) and discretized with hundreds of millions of unknowns. Scattering and radiation problems involving ... 
Stabilization and disturbance rejection for the beam equation
(IEEE, 2001)We consider a system described by the EulerBernoulli beam equation in a bounded domain with appropriate boundary conditions. To stabilize the system, we propose a dynamic boundary controller applied at the free end of the ... 
Stabilization and disturbance rejection for the wave equation
(IEEE, 1994)We consider a system described by the one dimensional linear wave equation in a bounded domain with appropriate boundary conditions. To stabilize the system, we propose a dynamic boundary controller applied at the free end ... 
Stabilization and disturbance rejection for the wave equation
(Institute of Electrical and Electronics Engineers, 199801)We consider a system described by the onedimensional linear wave equation in a bounded domain with appropriate boundary conditions. To stabilize the system, we propose a dynamic boundary controller applied at the free end ... 
Subsurfacescattering calculations via the 3D FDTD method employing PML ABC for layered media
(IEEE, 1997)A threedimensional finitedifference timedomain method that employs pure scatteredfield formulation and perfectly matched layers (PML) as the absorbing boundary condition is developed for solving subsurfacescattering. ... 
Test of accuracy of the generalized boundary conditions in the scattering by thin dielectric strips
(IEEE, 201405)The twodimensional (2D) scattering of the E and Hpolarized plane electromagnetic waves by a freestanding thinner than the wavelength dielectric strip is considered numerically. Two methods are compared: singular integral ... 
Threedimensional FDTD modeling of a GPR
(IEEE, 2000)The power and flexibility of the FiniteDifference TimeDomain (FDTD) method are combined with the accuracy of the perfectlymatched layer (PML) absorbing boundary conditions to simulate realistic groundpenetrating radar ... 
Threedimensional FDTD modeling of a groundpenetrating radar
(IEEE, 2000)The finitedifference timedomain (FDTD) method is used to simulate threedimensional (3D) geometries of realistic groundpenetrating radar (GPR) scenarios. The radar unit is modeled with two transmitters and a receiver ... 
Transmitterreceivertransmitter configurations of groundpenetrating radar
(WileyBlackwell Publishing, Inc., 2002)Threedimensional groundpenetrating radar (GPR) geometries are simulated using the finite difference time domain (FDTD) method. The GPR is modeled with a receiver and two transmitters with arbitrary polarizations in order ... 
Transmitterreceivertransmitterconfigured groundpenetrating radars over randomly heterogeneous ground models
(WileyBlackwell Publishing, Inc., 2002)Groundpenetrating radar (GPR) problems are simulated using the finitedifference timedomain (FDTD) method. The GPR model is configured with arbitrarily polarized three antennas, two of which are transmitting antennas fed ...