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A Genetic Algorithm for Mixed Integer Nonlinear Programming Problems Using Separate Constraint Approximations
(Department of Computer Science, Virginia Polytechnic Institute & State University, 2003), TR-03-22
This paper describes a new approach for reducing the number of the fitness and constraint function evaluations required by a genetic algorithm (GA) for optimization problems with mixed continuous and discrete design ...
ScALPEL: A Scalable Adaptive Lightweight Performance Evaluation Library for application performance monitoring
(Department of Computer Science, Virginia Polytechnic Institute & State University, 2009-02-01), TR-09-03
As supercomputers continue to grow in scale and capabilities, it is becoming increasingly difficult to isolate processor and system level causes of performance degradation. Over the last several years, a significant number ...
Computational Steering in the Problem Solving Environment WBCSim
(Department of Computer Science, Virginia Polytechnic Institute & State University, 2009), TR-09-08
Computational steering allows scientists to interactively control a numerical experiment and adjust parameters of the computation on-the-fly and explore “what if ” analysis. Computational steering effectively reduces ...
ODRPACK95: A Weighted Orthogonal Distance Regression Code with Bound Constraints
(Department of Computer Science, Virginia Polytechnic Institute & State University, 2004), TR-04-31
ODRPACK (TOMS Algorithm 676) has provided a complete package for weighted orthogonal distance regression for many years. The code is complete with user selectable reporting facilities, numerical and analytic derivatives, ...
The Effects of Task, Task Mapping, and Layout Space on User Performance in Information-Rich Virtual Environments
(Department of Computer Science, Virginia Polytechnic Institute & State University, 2006), TR-06-12
How should abstract information be displayed in Information-Rich Virtual Environments (IRVEs)? There are a variety of techniques available, and it is important to determine which techniques help foster a user’s understanding ...
CITIDEL Collection Building
(Department of Computer Science, Virginia Polytechnic Institute & State University, 2003), TR-03-14
The aim of this study is to facilitate the goals of the Computing and Information Technology Interactive Digital Educational Library (CITIDEL) by increasing the number of collections available to it. This study will help ...
Implementation of Motion Without Movement on Real 3D Objects
(Department of Computer Science, Virginia Polytechnic Institute & State University, 2004), TR-04-02
Researchers have developed a technique such that when the colors of a static image are toggled on a screen, the illusion of continuous movement in a certain direction is produced. This phenomenon is known as motion without ...
An Analysis of 10-Gigabit Ethernet Protocol Stacks in Multicore Environments
(Department of Computer Science, Virginia Polytechnic Institute & State University, 2007), TR-07-25
This paper analyzes the interactions between the protocol stack (TCP/IP or iWARP over 10-Gigabit Ethernet) and its multicore environment. Specifically, for host-based protocols such as TCP/IP, we notice that a significant ...
Compositional Mining of Multi-Relational Biological Datasets
(Department of Computer Science, Virginia Polytechnic Institute & State University, 2007-08-01), TR-07-29
High-throughput biological screens are yielding ever-growing streams of information about multiple aspects of cellular activity. As more and more categories of datasets come online, there is a corresponding multitude of ...
Mining Posets from Linear Orders
(Department of Computer Science, Virginia Polytechnic Institute & State University, 2009), TR-09-16
There has been much research on the combinatorial problem of generating the linear extensions of a given poset. This paper focuses on the reverse of that problem, where the input is a set of linear orders, and the goal is ...