Results 281 to 290 of about 313,689 (330)

An Object Grammar for Column-Convex Polyominoes

Annals of Combinatorics, 2004
This articles shows an object grammar decomposition for the classes of column convex and directed column-convex polyominoes. The authors obtain the enumeration of these classes according to the semi-perimeter. In addition to that, they give an explanation of the algebraicity of the generating function for both classes.
Duchi E., RINALDI, SIMONE
openaire   +3 more sources

Processing Learning Objects with Attribute Grammars

2009 Ninth IEEE International Conference on Advanced Learning Technologies, 2009
The services provided by learning object repositories are usually enabled by the processing of the metadata documents associated with these learning objects. This paper proposes a way to process these metadata documents, which are usually encoded in XML, through a framework called XLOP.
Antonio Sarasa-Cabezuelo   +2 more
openaire   +1 more source

From object algebras to attribute grammars

ACM SIGPLAN Notices, 2014
Oliveira and Cook (2012) and Oliveira et al. (2013) have recently introduced object algebras as a program structuring technique to improve the modularity and extensibility of programs. We analyze the relationship between object algebras and attribute grammars (AGs), a formalism to augment context-free grammars with attributes.
Tillmann Rendel   +2 more
openaire   +1 more source

Derivations in Object-Oriented Graph Grammars

2004
This work aims to extend the algebraic single-pushout approach to graph transformation to model object-oriented systems structures and computations. Graphs whose sets of nodes and edges are partially ordered are used to model the class hierarchy of an object-oriented system, making the inheritance and overriding relations explicit.
Ana Paula Lüdtke Ferreira   +1 more
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Objective evaluation of inferred context-free grammars

Proceedings of ANZIIS '94 - Australian New Zealnd Intelligent Information Systems Conference, 2002
An infinite number of context-free grammars may be inferred from a given training set. The defensibility of any single grammar hinges on the ability to compare that grammar against others in a meaningful way. In keeping with the minimum description length principle, smaller grammars are preferred over larger ones, but only insofar as the small grammar ...
T.C. Smith   +3 more
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Object-orientation in attribute grammars

1991
Object-orientation is a language design and programming paradigm aiming at better structuring, reusing, and maintaining properties of software. This paradigm has been successfully combined with conventional programming languages, as well as with functional and logic programming languages; it seems obvious that object-orientation has come to stay ...
openaire   +1 more source

THREE-DIMENSIONAL OBJECT PATTERN REPRESENTATION BY ARRAY GRAMMARS

International Journal of Pattern Recognition and Artificial Intelligence, 1992
A formal model for three-dimensional object representation is introduced. It uses parallel techniques and significantly reduces the time required for dealing with three-dimensional image analysis problems. Its fundamental properties are investigated and several interesting examples are illustrated.
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