منابع مشابه
Designing OQL: Allowing Objects to be Queried
This paper tells the story of OQL the standard query language of the Object Database Management Group ODMG The story starts in at INRIA in the Alta r Groupy The objective of that group was to develop an object oriented database system This objective was reached in September the O database system started its commercial career as the main product of a company called O Technology As opposed to its...
متن کاملQunits: queried units for database search
Keyword search against structured databases has become a popular topic of investigation, since many users find structured queries too hard to express, and enjoy the freedom of a “Google-like” query box into which search terms can be entered. Attempts to address this problem face a fundamental dilemma. Database querying is based on the logic of predicate evaluation, with a precisely defined answ...
متن کاملCONQUER: Confusion Queried Online Bandit Learning
We present a new recommendation setting for picking out two items from a given set to be highlighted to a user, based on contextual input. These two items are presented to a user who chooses one of them, possibly stochastically, with a bias that favors the item with the higher value. We propose a second-order algorithm framework that members of it use uses relative upper-confidence bounds to tr...
متن کاملQunits: queried units in database search
Keyword search against structured databases has become a popular topic of investigation, since many users find structured queries too hard to express, and enjoy the freedom of a “Google-like” query box into which search terms can be entered. Attempts to address this problem face a fundamental dilemma. Database querying is based on the logic of predicate evaluation, with a precisely defined answ...
متن کاملRD-flatness and RD-injectivity
It is proved that every commutative ring whose RD-injective modules are Σ-RD-injective is the product of a pure semi-simple ring and a finite ring. A complete characterization of commutative rings for which each artinian (respectively simple) module is RD-injective, is given. These results can be obtained by using the properties of RD-flat modules and RD-coflat modules which are respectively th...
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ژورنال
عنوان ژورنال: Nature Medicine
سال: 2002
ISSN: 1078-8956,1546-170X
DOI: 10.1038/nm0202-93a