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Articles 56131 - 56160 of 57977
Full-Text Articles in Physical Sciences and Mathematics
Array Reshaping -- A Mechanism For Optimizing Array Storage On Parallel Architecture, Ko-Yang Wang
Array Reshaping -- A Mechanism For Optimizing Array Storage On Parallel Architecture, Ko-Yang Wang
Department of Computer Science Technical Reports
No abstract provided.
Heuristic Guided Pre-Optimized Algorithm Substitution For Parallel Computers, Ko-Yang Wang
Heuristic Guided Pre-Optimized Algorithm Substitution For Parallel Computers, Ko-Yang Wang
Department of Computer Science Technical Reports
No abstract provided.
The Duke Internet Programming Contest, Owen Astrachan, Vivek Khera, David Kotz
The Duke Internet Programming Contest, Owen Astrachan, Vivek Khera, David Kotz
Dartmouth Scholarship
On the evening of October 23, 1990, electronic mail messages started to pour into the computers at the Duke University Computer Science Department. Teams of programmers from all over the world were registering to compete in the first global (as far as the authors are aware) programming contest to be held on the Internet. During the three hour competition, modeled after the annual ACM scholastic programming contest, 60 teams from 37 institutions in 5 countries attempted to solve a set of six programming problems using C or Pascal. Their solutions were sent by electronic mail to Duke, where their programs …
Models And Algorithms For Co-Scheduling Compute-Intensive Tasks On A Network Of Workstations, Mikhail J. Atallah, Christina Lock, Dan C. Marinescu, Howard J. Seigel, Thomas L. Casavant
Models And Algorithms For Co-Scheduling Compute-Intensive Tasks On A Network Of Workstations, Mikhail J. Atallah, Christina Lock, Dan C. Marinescu, Howard J. Seigel, Thomas L. Casavant
Department of Computer Science Technical Reports
No abstract provided.
Voronoi Diagrams In A River, Kokichi Sugihara
Voronoi Diagrams In A River, Kokichi Sugihara
Department of Computer Science Technical Reports
No abstract provided.
Implementing Expert System Rule Conditions By Neural Networks, Henry Tirri
Implementing Expert System Rule Conditions By Neural Networks, Henry Tirri
Department of Computer Science Technical Reports
No abstract provided.
Brep-Index: A Multi-Dimensional Space Partitioning Tree, George Vanĕček
Brep-Index: A Multi-Dimensional Space Partitioning Tree, George Vanĕček
Department of Computer Science Technical Reports
No abstract provided.
Fitting Semantics For Conditional Term Rewriting, Chilukuri K. Mohan
Fitting Semantics For Conditional Term Rewriting, Chilukuri K. Mohan
Electrical Engineering and Computer Science - Technical Reports
This paper investigates the semantics of conditional term rewriting systems with negation which do not satisfy useful properties like termination. It is shown that the approach used by Fitting [5] for Prolog-style logic programs is applicable in this context. A monotone operator is developed, whose fixpoints describe the semantics of conditional rewriting. Several examples illustrate this semantics for non-terminating rewrite systems which could not be easily handled by previous approaches.
Householder Reduction, Per Brinch Hansen
Householder Reduction, Per Brinch Hansen
Electrical Engineering and Computer Science - Technical Reports
This tutorial discusses Householder reduction of n linear equations to a triangular form which can be solved by back substitution. The main strengths of the method are its numerical stability and suitability for parallel computing. We explain how Householder reduction can be derived from elementary matrix algebra. The method is illustrated by a numerical example and a Pascal algorithm. We assume that the reader has a general knowledge of vector and matrix algebra but is less familiar with linear transformation of a vector space.
The All-Pairs Pipeline, Per Brinch Hansen
The All-Pairs Pipeline, Per Brinch Hansen
Electrical Engineering and Computer Science - Technical Reports
An all-pairs problem is a computation on every possible subset consisting of two elements chosen from a set of n elements. N-body simulation and Householder reduction are all-pairs problems. The paper defines the all-pairs problem concisely by means of precedence matrices and derives a parallel algorithm. The algorithm is presented in both coarse-grain and medium-grain form. The all-pairs paradigm is illustrated by a pipeline for Householder reduction of a matrix to triangular form.
Balancing A Pipeline By Folding, Per Brinch Hansen
Balancing A Pipeline By Folding, Per Brinch Hansen
Electrical Engineering and Computer Science - Technical Reports
A pipeline for Householder reduction is folded several times across an array of processors to achieve approximate load balancing. The performance of the folded pipeline is analyzed and measured on a Computing Surface.
Analyzing Images Containing Multiple Sparse Patterns With Neural Networks, Rangachari Anand, Kishan Mehrotra, Chilukuri K. Mohan, Sanjay Ranka
Analyzing Images Containing Multiple Sparse Patterns With Neural Networks, Rangachari Anand, Kishan Mehrotra, Chilukuri K. Mohan, Sanjay Ranka
Electrical Engineering and Computer Science - Technical Reports
We have addressed the problem of analyzing images containing multiple sparse overlapped patterns. This problem arises naturally when analyzing the composition of organic macromolecules using data gathered from their NMR spectra. Using a neural network approach, we have obtained excellent results in using NMR data to analyze the presence of amino acids in protein molecules. We have achieved high correct classification percentages (about 87%) for images containing as many as five substantially distorted overlapping patterns.
A Multi-Scale Approach For Recognizing Complex Annotations In Engineering Documents., Andrew Francis Laine, William Ball, Arun Kumar
A Multi-Scale Approach For Recognizing Complex Annotations In Engineering Documents., Andrew Francis Laine, William Ball, Arun Kumar
All Computer Science and Engineering Research
This paper describes a novel method of character recognition targeted for extracting complex annotations found in engineering documents. The results of this work will make it possible to capture the information contained in documents used to support facilities management and manufacturing. The recognition problem is made difficult in part because characters and text may be expressed in arbitrary fonts and orientations. Our approach includes a novel incremental strategy based on the multi-scale representation of wavelet decompositions. Our approach is motivated by biological mechanisms of the human visual systems. Using wavelets as a set of basis functions, we may decompose an …
Problems To Test Parallel And Vector Languages -- Ii, John R. Rice, Jin Jing
Problems To Test Parallel And Vector Languages -- Ii, John R. Rice, Jin Jing
Department of Computer Science Technical Reports
No abstract provided.
A Performance Predication Model For Parallel Compilers, Ko-Yang Wang
A Performance Predication Model For Parallel Compilers, Ko-Yang Wang
Department of Computer Science Technical Reports
No abstract provided.
An Interactive Symbolic-Numeric Interface To Parallel Ellpack For Building General Pde Solvers, S. Weerawarana, Elias N. Houstis, John R. Rice
An Interactive Symbolic-Numeric Interface To Parallel Ellpack For Building General Pde Solvers, S. Weerawarana, Elias N. Houstis, John R. Rice
Department of Computer Science Technical Reports
No abstract provided.
Optimal Superprimitivity Testing For Strings, Alberto Apostolico, Martin Farach, Costas S. Iliopoulos
Optimal Superprimitivity Testing For Strings, Alberto Apostolico, Martin Farach, Costas S. Iliopoulos
Department of Computer Science Technical Reports
No abstract provided.
Implementation And Performance Of A Communication Facility For Distributed Transaction Processing, Enrique Mafla, Bharat Bhargava
Implementation And Performance Of A Communication Facility For Distributed Transaction Processing, Enrique Mafla, Bharat Bhargava
Department of Computer Science Technical Reports
No abstract provided.
On Good Triangulations In Three Dimensions, Tamal K. Dey, Chanderjit L. Bajaj, Kokichi Sugihara
On Good Triangulations In Three Dimensions, Tamal K. Dey, Chanderjit L. Bajaj, Kokichi Sugihara
Department of Computer Science Technical Reports
No abstract provided.
Managing Data Synchronization Automatically For Distributed-Memory Architectures, Ko-Yang Wang
Managing Data Synchronization Automatically For Distributed-Memory Architectures, Ko-Yang Wang
Department of Computer Science Technical Reports
No abstract provided.
Experiences With Parallelizing A Distributed Database System, Bharat Bhargava, Janche Sang, Yin-He Jiant
Experiences With Parallelizing A Distributed Database System, Bharat Bhargava, Janche Sang, Yin-He Jiant
Department of Computer Science Technical Reports
No abstract provided.
A Perspective On The Cypress Internetworking Technology, Thomas Narten, Douglas E. Comer, Rajendra Yavatkar
A Perspective On The Cypress Internetworking Technology, Thomas Narten, Douglas E. Comer, Rajendra Yavatkar
Department of Computer Science Technical Reports
No abstract provided.
Piecewise Linear Approximations Of Digitized Space Curves With Applications, Insung Ihm, Bruce Naylor
Piecewise Linear Approximations Of Digitized Space Curves With Applications, Insung Ihm, Bruce Naylor
Department of Computer Science Technical Reports
No abstract provided.
Compiling Programs For Nonshared Memory Machines, Charles Koelbel
Compiling Programs For Nonshared Memory Machines, Charles Koelbel
Department of Computer Science Technical Reports
No abstract provided.
Segment Streaming For Efficient Pipelined Televisualization, Fengmin Gong
Segment Streaming For Efficient Pipelined Televisualization, Fengmin Gong
All Computer Science and Engineering Research
The importance of scientific visualization for both science and engineering endeavors has been well recognized. Televisualization becomes necessary because of the physical distribution of data, computation resources, and users involved in the visualization process. However, televisualization poses a number of challenges to the designers of communication protocols. A pipelined televisualization (PTV) model is proposed for efficient implementation of a class of visualization applications. Central to the proposed research is the development of a segment of streaming IPC (interprocess communication) mechanism in support of efficient pipelining across very high speed internetworks. This requires exploration of special issues arising from extending a …
Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, November 1990, College Of Engineering And Computer Science, Wright State University
Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, November 1990, College Of Engineering And Computer Science, Wright State University
BITs and PCs Newsletter
A ten page newsletter created by the Wright State University College of Engineering and Computer Science that addresses the current affairs of the college.
Engineering Software Under Statistical Quality-Control, R. H. Cobb, Harlan D. Mills
Engineering Software Under Statistical Quality-Control, R. H. Cobb, Harlan D. Mills
The Harlan D. Mills Collection
No abstract provided.
Axiomatization Of Some Natural Quantifiers, William C. Purdy
Axiomatization Of Some Natural Quantifiers, William C. Purdy
Electrical Engineering and Computer Science - Technical Reports
This paper extends an existing logic, £n, to some of the generalized quantifiers of natural language. In contrast to the usual approach, this extension does not require the identity relation. Sommers has suggested that the identity is unnecessary in a logic that properly treats singular terms. This paper lends support to Sommers position. £n is a logic designed for natural language reasoning (see [3]). This paper defines an extension, LNQ, of that logic to include the cardinal quantifiers, at least n, and the second-order quantifier, most. Because of the limited expressiveness of first-order languages, a complete axiomatization for most is …
Hypercube Algorithms For Operations On Quadtrees, Ravi V. Shankar, Sanjay Ranka
Hypercube Algorithms For Operations On Quadtrees, Ravi V. Shankar, Sanjay Ranka
Electrical Engineering and Computer Science - Technical Reports
This paper describes parallel algorithms for the following operations on quadtrees - boolean operations (union, intersection, complement), collapsing a quadtree, and neighbor finding in an image represented by a quadtree. The architecture assumed in this paper is a hypercube with one processing element (PE) per hypercube node. We assume that the architecture is SIMD, i.e., all PEs work under the control of a single control unit.
Forecasting The Behavior Of Multivariate Time Series Using Neural Networks, Kanad Charkraborty, Kishan Mehrotra, Chilukuri K. Mohan, Sanjay Ranka
Forecasting The Behavior Of Multivariate Time Series Using Neural Networks, Kanad Charkraborty, Kishan Mehrotra, Chilukuri K. Mohan, Sanjay Ranka
Electrical Engineering and Computer Science - Technical Reports
This paper presents a neural network approach to multivariate time-series analysis. Real world observations of flour prices in three cities have been used as a benchmark in our experiments. Feedforward connectionist networks have been designed to model flour prices over the period from August 1972 to November 1980 for the cities of Buffalo, Minneapolis, and Kansas City. Remarkable success has been achieved in training the networks to learn the price curve for each of these cities, and thereby to make accurate price predictions. Our results show that the neural network approach leads to better predictions than the autoregressive moving average(ARMA) …