نتایج جستجو برای: data bases

تعداد نتایج: 2462774  

2009
Georgi Kobilarov Christian Bizer Sören Auer Jens Lehmann

The DBpedia project has extracted a rich knowledge base from Wikipedia and serves this knowledge base as Linked Data on the Web. DBpedia’s knowledge base currently provides 274 million pieces of information about 2.6 million concepts. As DBpedia covers a wide range of domains and has a high degree of conceptual overlap with various openlicense datasets that are already available on the Web, an ...

ژورنال: مجله دندانپزشکی 2003
ابراهیمی, محسن, عبادیان, بهناز, مشرف, رامین,

Statement of Problem:Iranian product, Acropars autopolymerizing acrylic resin is nowadays widely used in dental prostheses. Dimensional change is a common problem among Iranian made acrylic resins in making custom trays and record bases, seems to be more than the similar foreign products. In order to achieve a technique for making a record base with minimum dimensional changes, more research is...

Journal: :journal of linear and topological algebra (jlta) 0
s s. karimizad department of mathematics, faculty of science, islamic azad university, central tehran branch, tehran, iran

g-frames in hilbert spaces are a redundant set of operators which yield a repre-sentation for each vector in the space. in this paper we investigate the connection betweeng-frames, g-orthonormal bases and g-riesz bases. we show that a family of bounded opera-tors is a g-bessel sequences if and only if the gram matrix associated to its de nes a boundedoperator.

2015
Chung-Chien Hsu Jen-Tzung Chien Tai-Shih Chi

This paper proposes a layered nonnegative matrix factorization (L-NMF) algorithm for speech separation. The standard NMF method extracts parts-based bases out of nonnegative training data and is often used to separate mixed spectrograms. The proposed L-NMF algorithm comprises of several layers of standard NMF blocks. During training, each layer of the L-NMF is initialized separately and then fi...

Journal: :journal of medical bacteriology 0
azad khaledi antimicrobial resistance research center, avicenna research institute, department of microbiology and virology, faculty of medicine, mashhad university of medical sciences, mashhad, iran. abbas bahador department of microbiology, school of medicine, tehran university of medical sciences, tehran, iran. davoud esmaeili applied microbiology research center, and microbiology department, baqiyatallah university of medical sciences, tehran, iran. kiarash ghazvini antimicrobial resistance research center, avicenna research institute, department of microbiology and virology, faculty of medicine, mashhad university of medical sciences, mashhad, iran.

background :    although, nontuberculous mycobacteria can cause disease in different organisms, they usually are not reported in most countries because scientists in general consider them as non-pathogens. but, increasing nontuberculous mycobacteria diseases occurrence has changed this belief. nevertheless, there is no meta-analysis review about prevalence of nontuberculous mycobacteria in iran...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد گرمسار - دانشکده زبانهای خارجی 1389

previous studies have aimed at testing a hypothesis but the present study is data-first research in which researcher tries to form a theory from data rather than the use of data to test a hypothesis. this study aims at exploring teachers perceptions of the strengths and weaknesses of the current syllabus for college preparatory course. eight experienced teachers were selected to collect data du...

1990
Leighton Ku Marilyn Rymer Ellwood John Klemm

The wide range of data bases that can be used for Medicaid analyses and research are reviewed in this article. The Health Care Financing Administration, State Medicaid agencies, and other groups have developed useful data bases and made them available to the public. Efforts could be made to obtain better quality national data, including annual reports on State participation, expenditures and pr...

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