نتایج جستجو برای: dl

تعداد نتایج: 45779  

2012
Thomas Eiter Michael Fink Daria Stepanova

Description Logic programs (DL-programs) are a prominent approach for a loose coupling of rules and ontologies, which has become a topic of increased interest. When computing answer sets of a DL-program, special DL-atoms, which provide query interface to an ontology, are evaluated under a possibly changing input that gives a context for the evaluation. Many different such contexts may exist and...

2008
Álvaro F. Moreira Renata Vieira

In previous work [8] we proposed an extension for the belief base of AgentSpeak agents based on Description Logic, aiming at enabling agent oriented programming to cope with recently proposed technologies for the Semantic Web. In such an extension an agent belief base contains the definition of complex concepts, besides specific factual knowledge. The foreseen advantages are: (i) more expressiv...

2008
Claudio Corona Emma Di Pasquale Antonella Poggi Marco Ruzzi Domenico Fabio Savo

DL-Lite is a family of Description Logics (DLs) whose aim is to capture some of the most popular conceptual modeling formalisms, such as Entity-Relationship model [4] and UML class diagrams1, while preserving the tractability of the most important reasoning tasks, such as ontology satisfiability and query answering of arbitrary (union of) conjunctive queries (ground and not ground). More specif...

2015
Carsten Lutz

Query rewriting has become a very prominent tool for efficiently implementing ontology-mediated querying in practice. The technique was originally introduced in the context of DL-Lite [4], but is now increasingly being used also for more expressive DLs. While rewritings are not guaranteed to exist beyond DL-Lite, the simple structure of ontologies that emerge from practical applications gives h...

2012
Ognjen Savkovic Diego Calvanese

In Description Logics (DLs) and in the ontology-based data access (OBDA) scenario, the use of actual datatypes (such as those adopted in DBMSs) has received only limited attention, although datatypes, with their predefined semantics, might have a substantial impact on the computational complexity of inference in ontology systems. In this work we aim at overcoming these limitations, and study th...

Journal: :Journal of Research of the National Bureau of Standards Section A: Physics and Chemistry 1974

پایان نامه :وزارت بهداشت، درمان و آموزش پزشکی - دانشگاه علوم پزشکی و خدمات بهداشتی درمانی استان کرمان 1376

موضوع مطالعه، مقایسه اثر دو داروی ژمفیبروزیل "gemfibrozil" و گارلت "garlet" بر روی یکصد بیمار مبتلا به هیپرلیپیدمی. افراد مورد مطالعه به سه دسته گروه a: که سابقه ای از بیماریهای عروقی قلب "c.a.d" نداشته و ریسک فاکتوری نیز برای این بیماریها ندارند، گروه b: که 2 و یا بیشتر از دو ریسک فاکتور "c.a.d" دارند و گروه c: که سابقه یا سوابقی از بیماریهای عروقی قلب دارند، تقسیم و طبقه بندی شدند. درمان دارو...

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