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We undertake an empirical study in which the performance of a good genetic algorithm is tested against some well-known bin packing heuristics on a range of two-dimensional bin packing problems. Weâ€¦ (More)

- Christine L. Valenzuela, Pearl Y. Wang
- IEEE Trans. Evolutionary Computation
- 2002

We present a genetic algorithm (GA) that uses a slicing tree construction process for the placement and area optimization of soft modules in very large scale integration floorplan design. We haveâ€¦ (More)

1 I n t r o d u c t i o n The frequency assignment problem is a difficult, NP-hard, problem of considerable importance. The radio spectrum is a limited natural resource that is used in a variety ofâ€¦ (More)

- Pearl Y. Wang, Christine L. Valenzuela
- European Journal of Operational Research
- 2001

This report describes a recursive process for generating data sets of rigid rectangles that can be placed into rectangular regions with zero waste. The generation procedure can be mod ified toâ€¦ (More)

- Christine L. Valenzuela, Pearl Y. Wang
- IEEE Transactions on Systems, Man, andâ€¦
- 2000

Floorplanning is an important problem in very large scale integrated-circuit (VLSI) design automation as it determines the performance, size, yield, and reliability of VLSI chips. From theâ€¦ (More)

The Held-Karp lower bound (HK) provides a very good problem-specific estimate of optimal tour length for the travelling salesman problem (TSP). This measure, which is relatively quick and easy toâ€¦ (More)

- Christine L. Valenzuela, Peter L. Williams
- ICGA
- 1997

- Christine L. Valenzuela
- J. Heuristics
- 2001

The genetic algorithm (GA) described in this paper breeds permutations of transmitters for minimum span frequency assignment. The approach hybridizes a GA with a greedy algorithm, and employs aâ€¦ (More)

- Christine L. Valenzuela, Antonia J. Jones
- Evolutionary Computation
- 1993

Experiments with genetic algorithms using permutation operators applied to the traveling salesman problem (TSP) tend to suggest that these algorithms fail in two respects when applied to very largeâ€¦ (More)

- A. H. Gilbert, Frances Bell, Christine L. Valenzuela
- Evolutionary Computation
- 1995

A classifier system is used to learn control and profit optimization of a batch chemical reaction. Ability to learn different market conditions and changes to reaction parameters is demonstrated. Theâ€¦ (More)