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Articles 6871 - 6900 of 8612
Full-Text Articles in Entire DC Network
Computer Vision, Descriptive Geometry, And Classical Mechanics, Christoph M. Hoffmann
Computer Vision, Descriptive Geometry, And Classical Mechanics, Christoph M. Hoffmann
Department of Computer Science Technical Reports
No abstract provided.
How To Compute Offsets Without Self-Intersection, Ching-Shoei Chiang, Christoph M. Hoffmann, Robert E. Lynch
How To Compute Offsets Without Self-Intersection, Ching-Shoei Chiang, Christoph M. Hoffmann, Robert E. Lynch
Department of Computer Science Technical Reports
No abstract provided.
Data Structures And Sparsity In A Digital Simulation Of An Hvdc Link, Mark Timothy Luehmann
Data Structures And Sparsity In A Digital Simulation Of An Hvdc Link, Mark Timothy Luehmann
Department of Electrical and Computer Engineering Technical Reports
An earlier algorithm for the detailed simulation of the High Voltage Direct Current (HVDC) link using the tensor approach was modified to improve the runtime speed. The runtime, approximately eleven percent that of the original algorithm, was improved by employing sparsity techniques, restructuring the state matrix, and condensing subroutines. The readability of the code was accomplished by a modular programming approach. This research was done for a two-terminal simulation, but could be expanded and modified to include multiterminal simulations.
On Solving Constrained Optimization Problems With Neural Networks : A Penalty Function Method Approach, Walter E. Lillo, Mei Heng Loh, Stefen Hui, Stanislaw H. Zak
On Solving Constrained Optimization Problems With Neural Networks : A Penalty Function Method Approach, Walter E. Lillo, Mei Heng Loh, Stefen Hui, Stanislaw H. Zak
Department of Electrical and Computer Engineering Technical Reports
This paper is concerned with utilizing analog circuits to solve various linear and nonlinear programming problems. The dynamics of these circuits are analyzed. Then, the previously proposed circuit implementations for solving optimization problems are examined. A new nonlinear programming network and its circuit implementation is then introduced which utilizes the nonlinearities to eliminate the problems encountered in previous circuit implementations.
Stability Criteria For Yet Another Multidimensional Distributed System, Leonidas Georgiadis, Wojciech Szpankowski
Stability Criteria For Yet Another Multidimensional Distributed System, Leonidas Georgiadis, Wojciech Szpankowski
Department of Computer Science Technical Reports
No abstract provided.
Shortest Path Computations In S-Graphs, Greg N. Frederickson, Susanne E. Hambrusch, Hung-Yi Tu
Shortest Path Computations In S-Graphs, Greg N. Frederickson, Susanne E. Hambrusch, Hung-Yi Tu
Department of Computer Science Technical Reports
No abstract provided.
Algorithm Quad2d: General Two-Dimensional Quadrature, James V. Lambers
Algorithm Quad2d: General Two-Dimensional Quadrature, James V. Lambers
Department of Computer Science Technical Reports
No abstract provided.
Collaborating Pde Solvers, H. S. Mcfaddin, John R. Rice
Collaborating Pde Solvers, H. S. Mcfaddin, John R. Rice
Department of Computer Science Technical Reports
No abstract provided.
Numerical Quadrature For General Two-Dimensional Domains, James V. Lambers, John R. Rice
Numerical Quadrature For General Two-Dimensional Domains, James V. Lambers, John R. Rice
Department of Computer Science Technical Reports
No abstract provided.
The Ganith Algebraic Geometry Toolkit V 1.0, Chanderjit Bajaj, Andrew V. Royappa
The Ganith Algebraic Geometry Toolkit V 1.0, Chanderjit Bajaj, Andrew V. Royappa
Department of Computer Science Technical Reports
No abstract provided.
The Vaidak Medical Imaging And Model Reconstruction Toolkit, Brian Bailey, Chanderjit Bajaj, Malcolm C. Fields
The Vaidak Medical Imaging And Model Reconstruction Toolkit, Brian Bailey, Chanderjit Bajaj, Malcolm C. Fields
Department of Computer Science Technical Reports
No abstract provided.
Suffix Trees Revisited: (Un)Expected Asymptotic Behaviors, Wojciech Szpankowski
Suffix Trees Revisited: (Un)Expected Asymptotic Behaviors, Wojciech Szpankowski
Department of Computer Science Technical Reports
No abstract provided.
Xs: A Hardware Independent Graphics And Windows Library, Vinod Anupam, Chanderjit L. Bajaj, Andrew Burnett, Malcolm C. Fields, Andrew V. Royappa
Xs: A Hardware Independent Graphics And Windows Library, Vinod Anupam, Chanderjit L. Bajaj, Andrew Burnett, Malcolm C. Fields, Andrew V. Royappa
Department of Computer Science Technical Reports
No abstract provided.
Computer Viruses And Ethics, Eugene H. Spafford
Computer Viruses And Ethics, Eugene H. Spafford
Department of Computer Science Technical Reports
No abstract provided.
C1 Smoothing Of Polyhedra With Implicit Surface Patches, Chanderjit L. Bajaj, Insung Ihm
C1 Smoothing Of Polyhedra With Implicit Surface Patches, Chanderjit L. Bajaj, Insung Ihm
Department of Computer Science Technical Reports
No abstract provided.
Using Algebraic Geometry For Multivariate Hermite Interpolation, Chanderjit L. Bajaj
Using Algebraic Geometry For Multivariate Hermite Interpolation, Chanderjit L. Bajaj
Department of Computer Science Technical Reports
No abstract provided.
On A Matrix Identity Connecting Iteration Operators Associated With A P-Cyclic Matrix, Apostolos Hadjidimos, Dimitrios Noutsoss
On A Matrix Identity Connecting Iteration Operators Associated With A P-Cyclic Matrix, Apostolos Hadjidimos, Dimitrios Noutsoss
Department of Computer Science Technical Reports
No abstract provided.
On Surface Design With Implicit Algebraic Surfaces (Ph.D. Thesis), Insung Ihm
On Surface Design With Implicit Algebraic Surfaces (Ph.D. Thesis), Insung Ihm
Department of Computer Science Technical Reports
No abstract provided.
Decompositions Of Polyhedra In Three Dimensions (Ph.D. Thesis), Tamal Krishna Dey
Decompositions Of Polyhedra In Three Dimensions (Ph.D. Thesis), Tamal Krishna Dey
Department of Computer Science Technical Reports
No abstract provided.
Computing Torque And Related Output Variables Of A Switched Reluctancemachine Using A Magnetic Circuit Approach, Matthew E. Toennies
Computing Torque And Related Output Variables Of A Switched Reluctancemachine Using A Magnetic Circuit Approach, Matthew E. Toennies
Department of Electrical and Computer Engineering Technical Reports
The normal procedure industry employs in designing a Switched Reluctance Machine (SRM) is to construct and test a prototype to determine the machine's actual output characteristics. This procedure is time-consuming and does not allow for an accurate insight into machine dynamics. This research project consists of an analytical method for determining torque, current, and flux linkages of an SRM. A magnetic circuit modelling approach is employed for this research and the machine dimension parameters of the SRM as well as the B-H curve magnetization characteristics are utilized. The objective of the magnetic circuit modelling approach is to obtain results which …
Real-Time Helicopter Flight Control: Modelling And Control By Linearization And Neural Networks, Tobias J. Pallett, Shaheen Ahmad
Real-Time Helicopter Flight Control: Modelling And Control By Linearization And Neural Networks, Tobias J. Pallett, Shaheen Ahmad
Department of Electrical and Computer Engineering Technical Reports
In this report we determine the dynamic model of a miniature helicopter in hovering flight. Identification procedures for the nonlinear terms are also described. The model is then used to design several linearized control laws and a neural network controller. The controllers were then flight tested on a miniature helicopter flight control test bed the details of which are also presented in this report. Experimental performance of the linearized and neural network controllers are discussed. It was found from experimentation that the adaptive neural network technique was able to improve helicopter flight performance.
Dynamical Variable Structure Control Of A Helicopter In Vertical Flight, Hebertt Sira-Ramirez, Mohamed Zribi, Shaheen Ahmad
Dynamical Variable Structure Control Of A Helicopter In Vertical Flight, Hebertt Sira-Ramirez, Mohamed Zribi, Shaheen Ahmad
Department of Electrical and Computer Engineering Technical Reports
In this article, a dynamical multivariable discontinuous feedback control strategy of the sliding nlode type is proposed for the altitude stabilization of a nonlinear helicopter model in vertical flight. Vlrhile retaining the basic robustness features associated to sliding mode control policies, the proposed approach also results in smoothed out (i.e., non-chattering) input trajectories and controlled state variable responses.
Adaptive Dynamical Feedback Regulation Strategies For Linearizable Uncertain Systems, Hebertt Sira-Ramirez, Mohamed Zribi, Shaheen Ahmad
Adaptive Dynamical Feedback Regulation Strategies For Linearizable Uncertain Systems, Hebertt Sira-Ramirez, Mohamed Zribi, Shaheen Ahmad
Department of Electrical and Computer Engineering Technical Reports
In this paper we address the design of adaptive dynamical feedback strategies of the continuous and discontinuous, types for the output stabilization of nonlinear systems. The class of systems considered corresponds to nonlinear controlled systems exhibiting linear parametric uncertainty. Dynamical feedback controllers, ideally achieving output stabilization via exact linearization, are obtained by means of repeated output differentiation and, either, pole placement, or, sliding mode control techniques. The adaptive versions of the dynamical stabilizing controllers are then obtainable through standard, direct, overparamemzed adaptive control strategies available for linearizable systems. Illustrative examples are provided which deal with the regulation of electromechanical systems.
Blockwise Transform Image Coding Enhancement And Edge Detection, Sabzali Aghagolzadeh
Blockwise Transform Image Coding Enhancement And Edge Detection, Sabzali Aghagolzadeh
Department of Electrical and Computer Engineering Technical Reports
The goal of this thesis is high quality image coding, enhancement and edge detection. A unified approach using novel fast transforms is developed to achieve all three objectives. Requirements are low bit rate, low complexity of implementation and parallel processing. The last requirement is achieved by processing the image in small blocks such that all blocks can be processed simultaneously. This is similar to biological vision. A major issue is to minimize the resulting block effects. This is done by using proper transforms and possibly an overlap-save technique. The bit rate in image coding is minimized by developing new results …
Tree-Structured Nonlinear Adaptive Signal Processing, C. S. Ravishankar, Saul B. Gelfand, Edward J. Delp
Tree-Structured Nonlinear Adaptive Signal Processing, C. S. Ravishankar, Saul B. Gelfand, Edward J. Delp
Department of Electrical and Computer Engineering Technical Reports
In communication systems, nonlinear adaptive filtering has become increasingly popular in a variety of applications such as channel equalization, echo cancellation and speech coding. However, existing nonlinear adaptive filters such as polynomial (truncated Volterra series) filters and multilayer perceptrons suffer from a number of problems. First, although high Order polynomials can approximate complex nonlinearities, they also train very slowly. Second, there is no systematic and efficient way to select their structure. As for multilayer perceptrons, they have a very complicated structure and train extremely slowly Motivated by the success of classification and regression trees on difficult nonlinear and nonparametfic problems, …
Efficient Importance Sampling Simulations For Digital Communication Systems, Jyun-Cheng Chen
Efficient Importance Sampling Simulations For Digital Communication Systems, Jyun-Cheng Chen
Department of Electrical and Computer Engineering Technical Reports
Importance sampling is a- modified. Monte Carlo simulation technique which can dramatically reduce the computational cost of the Monte Carlo method. A complete development is presented for its use in the estimation of bit error rates /V for digital communication systems with small Gaussian noise inputs. Emphasis is on the optimal mean-translation Gaussian simulation density function design and the event simulation method as applied to systems which employ quasi-regular trellis codes. These codes include the convolutional codes and many TCM (Ungerboeck) codes. Euclidean distance information of a code is utilized to facilitate the simulation. Also, the conditional importance sampling technique …
Collision Detection And Analysis In A Physically Based Simulation, William J. Bouma, George Vanĕček
Collision Detection And Analysis In A Physically Based Simulation, William J. Bouma, George Vanĕček
Department of Computer Science Technical Reports
No abstract provided.
Type Reconstruction For Coercion Polymorphism (Technical Summary), Ryan Stansifer, Dan Wetklow
Type Reconstruction For Coercion Polymorphism (Technical Summary), Ryan Stansifer, Dan Wetklow
Department of Computer Science Technical Reports
No abstract provided.
Selective Inheritance And Overriding In Statically-Typed Object-Oriented Languages, Ryan Stansifer, Dan Wetklow
Selective Inheritance And Overriding In Statically-Typed Object-Oriented Languages, Ryan Stansifer, Dan Wetklow
Department of Computer Science Technical Reports
No abstract provided.
Multidimensional Digital Searching And Some New Parameters In Tries, Peter Kirschenhofer, Helmut Prodinger, Wojciech Szpankowski
Multidimensional Digital Searching And Some New Parameters In Tries, Peter Kirschenhofer, Helmut Prodinger, Wojciech Szpankowski
Department of Computer Science Technical Reports
No abstract provided.