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Loopy belief propagation for approximate inference: An empirical study. In:

by Kevin P Murphy , Yair Weiss , Michael I Jordan - Proceedings of Uncertainty in AI, , 1999
"... Abstract Recently, researchers have demonstrated that "loopy belief propagation" -the use of Pearl's polytree algorithm in a Bayesian network with loops -can perform well in the context of error-correcting codes. The most dramatic instance of this is the near Shannon-limit performanc ..."
Abstract - Cited by 676 (15 self) - Add to MetaCart
edgements We thank Tommi Jaakkola, David Heckerman and David MacKay for useful discussions. We also thank Randy Miller and the University of Pittsburgh for the use of the QMR-DT database. Supported by MURI ARO DAAH04-96-1-0341. algorithm. These approaches are guaranteed to find local maxima, but do

Index Structures for Path Expressions

by Tova Milo, Dan Suciu , 1997
"... In recent years there has been an increased interest in managing data which does not conform to traditional data models, like the relational or object oriented model. The reasons for this non-conformance are diverse. One one hand, data may not conform to such models at the physical level: it may be ..."
Abstract - Cited by 333 (7 self) - Add to MetaCart
systems support indexes for translating attribute values into tuple ids (e.g. B-trees or hash tables). In object-oriented databases, path queries replace the simpler associative queries. Several data structures have been proposed for answering path queries e ciently: e.g., access support relations 14

Database Description with SDM: A Semantic Database Model

by Michael Hammer, Dennis Mcleod - ACM Transactions on Database Systems , 1981
"... SDM is a high-level semantics-based database description and structuring formalism (database model) for databases. This database model is designed to capture more of the meaning of an application environment than is possible with contemporary database models. An SDM specification describes a databas ..."
Abstract - Cited by 216 (4 self) - Add to MetaCart
is based on our experience in using a preliminary version of it. SDM is designed to enhance the effectiveness and usability of database systems. An SDM database description can serve as a formal specification and documentation tool for a database; it can provide a basis for supporting a variety of powerful

Optimizing dynamically-typed object-oriented languages with polymorphic inline caches

by Craig Chambers, David Ungar, Elgin Lee , 1991
"... Abstract. We have developed and implemented techniques that double the performance of dynamically-typed object-oriented languages. Our SELF implementation runs twice as fast as the fastest Smalltalk implementation, despite SELF’s lack of classes and explicit variables. To compensate for the absence ..."
Abstract - Cited by 130 (10 self) - Add to MetaCart
Abstract. We have developed and implemented techniques that double the performance of dynamically-typed object-oriented languages. Our SELF implementation runs twice as fast as the fastest Smalltalk implementation, despite SELF’s lack of classes and explicit variables. To compensate for the absence

A study of three alternative workstation-server architectures for object-oriented database systems

by David J. Dewitt, David Maier, Fernando Velez , 1990
"... In the engineering and scientific marketplaces, the workstation-server model of computing is emerging as the standard of the 1990s. Implementing an object-oriented database system in this environment immediately presents the design choice of how to partition database functionality between the server ..."
Abstract - Cited by 114 (6 self) - Add to MetaCart
In the engineering and scientific marketplaces, the workstation-server model of computing is emerging as the standard of the 1990s. Implementing an object-oriented database system in this environment immediately presents the design choice of how to partition database functionality between

A survey of schema versioning issues for database systems

by John F. Roddick - Information and Software Technology , 1995
"... Schema versioning is one of a number of related areas dealing with the same general problem- that of using multiple heterogeneous schemata for various database related tasks. In particular, schema versioning, and its weaker companion, schema evolution, deal with the need to retain current data and s ..."
Abstract - Cited by 143 (5 self) - Add to MetaCart
Schema versioning is one of a number of related areas dealing with the same general problem- that of using multiple heterogeneous schemata for various database related tasks. In particular, schema versioning, and its weaker companion, schema evolution, deal with the need to retain current data

PC++: An Object-Oriented Database System for C++ Applications Tin A. Nguyen

by Objectivity Inc, Mark Wagner, Brent Hoffman
"... This paper describes PC++ (Persistent C++), an object-oriented database system that supports persistent storage, retrieval, and manipulation of C++ objects by multiple C++ applications exe-cuting concurrently on a network. PC++ supports persistent objects by extending the C++ programming language us ..."
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This paper describes PC++ (Persistent C++), an object-oriented database system that supports persistent storage, retrieval, and manipulation of C++ objects by multiple C++ applications exe-cuting concurrently on a network. PC++ supports persistent objects by extending the C++ programming language

Managing the Evolution of Object-Oriented Systems

by Paul L. Bergstein , 1994
"... ii Class organizations (schemas) evolve over the life cycle of object-oriented systems for avariety of reasons. This issue has recently been a subject of increasing attention in the literature of both object-oriented languages and object-oriented database systems. One of the most common forms of evo ..."
Abstract - Cited by 14 (1 self) - Add to MetaCart
ii Class organizations (schemas) evolve over the life cycle of object-oriented systems for avariety of reasons. This issue has recently been a subject of increasing attention in the literature of both object-oriented languages and object-oriented database systems. One of the most common forms

Definition and Application of Metaclasses in an Object-Oriented Database Model

by Jutta Goers, Andreas Heuer - In Proc. of the 9th Int. Conf. on Data Engineering, DE’93 , 1992
"... This paper presents the meta level concepts for an object-oriented database model. Up to now, systems including a metaclass concept are either (i) only implicitly supporting the management of meta information (like SMALLTALK) which restricts the application of this concept, or (ii) explicitly giving ..."
Abstract - Cited by 6 (0 self) - Add to MetaCart
This paper presents the meta level concepts for an object-oriented database model. Up to now, systems including a metaclass concept are either (i) only implicitly supporting the management of meta information (like SMALLTALK) which restricts the application of this concept, or (ii) explicitly

PolySPIN: Support for Polylingual Persistence, Interoperability and Naming in Object-Oriented Databases

by Alan Kaplan, Jack C. Wileden - In Foundations of Software Science and Computation Structures , 1996
"... Heterogeneity in information systems gives rise to a range of interoperability problems. For heterogeneous information systems based on traditional database technology, the dominant interoperability problems are multiple database (or schema) integration and multilingual access to individual database ..."
Abstract - Cited by 7 (0 self) - Add to MetaCart
databases. While similar interoperability problems can arise in heterogeneous information systems based on objectoriented database (OODB) technology, the nature of this new technology introduces new possibilities for heterogeneity and concomitant new interoperability problems. In particular, a given object-oriented
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