Pseudo-relevance feedback (PRF) is an effective technique for improving the retrieval performance through updating the query model using the top retrieved documents. Previous work shows that estimating the effectiveness of feedback documents can substantially affect the PRF performance. Following the recent studies on theoretical analysis of PRF models, in this paper, we introduce a new constra...

Applications ranging from grid management to sensor nets to web-based information integration and extraction can be viewed as receiving data from some number of autonomous remote data sources and then answering queries over this collected data. In such environments it is helpful to inform users which data sources are “relevant” to their query results. It is not immediately obvious what “relevan...

Fifty years ago Warren and Root have introduced the shape factor. This fundamental parameter for modeling of naturally fractured reservoirs has been discussed stormily ever since. Different definitions for shape factor have been suggested which all of them are heuristically based. Recently, Heinemann and Mittermeir mathematically derived - based on the dual-continuum theorem assuming pseudo-ste...

One of the latest and most controversial areas of science is biotechnology. Genetic engineering concerns with the manipulation of DNA molecules to modify plants, animals and other creatures. Scientists are now able to isolate a gene or genome in an animal or plant to another one, based on the traits they want to transfer. The movement of a gene from a living creature to another one is called th...

The article is devoted to the study of the evaluative component of the meaning of lexical means used to describe relations between family members in the novel “In Chancery” by J. Galsworthy. The relevance of t &he study can be attributed to the lack of works devoted to this problem. As the results of our study demonstrate, the words of the lexical-semantic group “family” were mainly used to ver...

Incidence and prognostic relevance of supraventricular arrhythmias were evaluated in nine studies. These studies investigated patients with different forms of pulmonary hypertension. Supraventricular arrhythmias were more often found in patients with group two pulmonary hypertension. Common findings in these patients were elevated right atrial pressure and diameters and reduced tricuspid annula...

the musculoskeletal disorders cover a large percent of occupational diseases; therefore, in order to protect workers from such disorders, there is a need to evaluate workers positions at work in different industries. in a major furniture manufacture located in tehran, 500 workers were examined. these workers were divided into fourteen working groups, including production lines of water-heater, ...

The academic literature has arguably never been more accessible. Through the internet, academics - and wider public are presented with an increasing array of platforms which offer sources information sources. Large-scale – such as Google Scholar often utilise algorithms in order to manage how search query results prioritised searchers. This ‘sorting by relevance’ introduces opaque layer readers...