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» Approximate Objects and Approximate Theories
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PODS
2000
ACM
102views Database» more  PODS 2000»
15 years 4 months ago
Linear Approximation of Planar Spatial Databases Using Transitive-Closure Logic
We consider spatial databases in the plane that can be defined by polynomial constraint formulas. Motivated by applications in geographic information systems, we investigate line...
Floris Geerts, Bart Kuijpers
AUTOMATICA
2008
154views more  AUTOMATICA 2008»
14 years 12 months ago
Approximately bisimilar symbolic models for nonlinear control systems
Control systems are usually modeled by differential equations describing how physical phenomena can be influenced by certain control parameters or inputs. Although these models ar...
Giordano Pola, Antoine Girard, Paulo Tabuada
GECCO
2008
Springer
148views Optimization» more  GECCO 2008»
15 years 28 days ago
Accelerating convergence using rough sets theory for multi-objective optimization problems
We propose the use of rough sets theory to improve the first approximation provided by a multi-objective evolutionary algorithm and retain the nondominated solutions using a new ...
Luis V. Santana-Quintero, Carlos A. Coello Coello
COCOON
2003
Springer
15 years 5 months ago
Tetris is Hard, Even to Approximate
In the popular computer game of Tetris, the player is given a sequence of tetromino pieces and must pack them into a rectangular gameboard initially occupied by a given configurat...
Erik D. Demaine, Susan Hohenberger, David Liben-No...
IADIS
2004
15 years 1 months ago
A first approximation to estimate the usability of a software application task
Our objective is to obtain the level of usability of a software application over the different tasks for which it has been developed. Nowadays, usability is measured through diffe...
M. González Aparicio, José Antonio L...