منابع مشابه
Answering Arbitrary Conjunctive Queries over Incomplete Data Stream Histories
Streams of data often originate from many distributed sources. A user wanting to query the streams should not need to know from where each stream originates but should be provided with a global view of the streams. R-GMA is a system that integrates distributed data streams to provide a global view of all the streams for users to query. R-GMA has been developed as a grid information and monitori...
متن کاملIncomplete Information
DEFINITION Incomplete information arises in relational databases, when a fact (tuple) has to be inserted in a relation, and values for some required columns are missing. For instance, in an employee database, the phone number of one employee might be missing, as might also the address of another employee. There are numerous reasons for such missing information, e.g. the insertion was done throu...
متن کاملIncomplete Information ∗
In interactive contexts such as games and economies, it is important to take account not only of what the players believe about substantive matters (such as payoffs), but also of what they believe about the beliefs of other players. Two different but equivalent ways of dealing with this matter, the semantic and the syntactic, are set forth. Canonical and universal semantic systems are then defi...
متن کاملInformation Integration and Incomplete Information
We first briefly review relational databases and incomplete information. We then describe how querying in Information Integration Systems amounts to querying incomplete databases. We also discuss query rewriting, which essentially is a (compile-time) query optimization technique used in processing queries in Information Integration systems. Finally, we review some recent advances in query rewri...
متن کاملIncomplete Information Aggregation Games
This paper concerns a class of collective decision-making problems under incomplete information. Members of a group receive private signals and the group must take a collective decision—e.g., make a group purchase—based on the aggregate of members’ private information. Since members have diverse preferences over the outcome of this decision, each has an incentive to manipulate the decision-maki...
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ژورنال
عنوان ژورنال: Computers & Mathematics with Applications
سال: 1988
ISSN: 0898-1221
DOI: 10.1016/0898-1221(88)90117-4