Browsing by Keywords "Computational methods"
Now showing items 120 of 57

Accurate modeling of metamaterials with MLFMA
(ESA Publications, 2006)Electromagnetic modelling of large metamaterial (MM) structures employing multilevel fast multipole algorithm (MLFMA) is reported. MMs are usually constructed by periodically embedding unit cells, such as splitring ... 
Agebased vs. stock level control policies for a perishable inventory system
(2001)In this study, we investigate the impact of modified lotsizereorder control policy for perishables which bases replenishment decisions on both the inventory level and the remaining lifetimes of items in stock. We derive ... 
An algorithm based on facial decomposition for finding the efficient set in multiple objective linear programming
(Elsevier, 1996)We propose a method for finding the efficient set of a multiple objective linear program based on the wellknown facial decomposition of the efficient set. The method incorporates a simple linear programming test that ... 
Analysis of the 2D nonconcentric large reflector antennainradome system: Hpolarization case
(IEEE, 2004)2D nonconcentric reflector antennainradome system is analyzed for Hpolarization case. Rigorous formulation is performed depending on the MoR, Green's function and CSP methods. Larger geometries are solved in reasonable ... 
Binary integer formulation for mixedmodel assembly line balancing problem
(Pergamon Press, 19980401)The assembly line balancing problem has been a focus of interest to the academicians of production/operations management for the last 40 years. Although there are numerous studies published on the various aspects of the ... 
A comparative study of computational procedures for the resource constrained project scheduling problem
(Elsevier, 1994)Performance of two new integer programming based heuristics together with some special purpose algorithms for project scheduling are tested from a computational point of view. The objective of the study is to compare the ... 
A comparative study of map building techniques by processing sonar arcmaps
(2005)In this study, four signal processing schemes regarding sonar sensor based mapbuilding applications were compared. The newly proposed method, Directional Maximum is found to be successful in terms of reducing the innate ... 
Comparison of local and global computation and its implications for the role of optical interconnections in future nanoelectronic systems
(Elsevier, 1993)Various methods of simulating diffusion phenomena with parallel hardware are discussed. In particular methods are compared requiring local and global communication among the processors in terms of total computation time. ... 
A comparison of two methods for fusing information from a linear array of sonar sensors for obstacle localization
(IEEE, 1995)The performance of a commonly employed linear array of sonar sensors is assessed for pointobstacle localization intended for robotics applications. Two different methods of combining timeofflight information from the ... 
Computation of holographic patterns between tilted planes
(SPIE  International Society for Optical Engineering, 200605)Computation of the diffraction pattern that gives the desired reconstruction of an object upon proper illumination is an important process in computer generated holography. A fast computational method, based on the plane ... 
A computational investigation of optimal parameters in pension reform
(Bilkent University, 2000)The purpose of this dissertation is to develop a computational framework to identify a set of parametric reform options to rehabilitate publicly run, payasyougobased pension systems under alternative strategies for ... 
Control of subsonic cavity flows by neural networksanalytical models and experimental validation
(American Institute of Aeronautics and Astronautics, 2005)Flow control is attracting an increasing attention of researchers from a wide spectrum of specialties because of its interdisciplinary nature and the associated challenges. One of the main goals of The Collaborative Center ... 
DCT coding of nonrectangularly sampled images
(IEEE, 1994)Discrete cosine transform (DCT) coding is widely used for compression of rectangularly sampled images. In this letter, we address efficient DCT coding of nonrectangularly sampled images. To this effect, we discuss an ... 
Decentralized control and periodic feedback
(IEEE, 1994)The decentralized stabilization problem for linear, discretetime, periodically timevarying plants using periodic controllers is considered. The main tool used is the technique of lifting a periodic system to a timeinvariant ... 
Designing emergency response networks for hazardous materials transportation
(2007)Undesirable consequences of dangerous goods incidents can be mitigated by quick arrival of specialized response teams at the accident site. We present a novel methodology to determine the optimal design of a specialized ... 
Diffraction and holography from a signal processing perspective
(SPIE, 2006)The fact that plane waves are solutions of the Helmholtz equation in free space allows us to write the exact solution to the diffraction problem as a superposition of plane waves. The solution of other related problems can ... 
The discrete fractional Fourier transformation
(IEEE, 1996)Based on the fractional Fourier transformation of sampled periodic functions, the discrete form of the fractional Fourier transformation is obtained. It is found that only for a certain dense set of fractional orders such ... 
Distancebased classification methods
(Taylor & Francis, 1999)Given a set of points in a Euclidean space, and a partitioning of this 'training set' into two or more subsets ('classes'), we consider the problem of identifying a 'reasonable' assignment of another point in the Euclidean ... 
The effects of structural characteristics of explanations on use of a DSS
(Elsevier, 2006)Research in the field of expert systems has shown that providing supporting explanations may influence effective use of system developed advice. However, despite many studies showing the less than optimal use made of DSS ... 
Efficient computation of surface fields excited on a dielectriccoated circular cylinder
(IEEE, 200010)An efficient method to evaluate the surface fields excited on an electrically large dielectriccoated circular cylinder is presented. The efficiency of the method results from the circumferentially propagating representation ...