We have surveyed and implemented different mathematical models to find the most relevant pages pertaining to some query for the case of an online encyclopedia. We have used the concepts of the webpage ranking to determine the ranking of the different topics and hence find the most important topics. The pages of an online encyclopedia are hyperlinked and this is represented by a directed graph a...

1 Abstract In our rst participation in TREC, our focus was on improving the basic ranking systems and applying text clustering techniques for query expansion. We tested a variety of techiniques including reference measures, passage retrieval, and data fusion for the basic ranking systems. Some te-chiniques were used in the oocial run, others were not used because of time limitations. We applied...

Network structure often contains information that can be useful for ranking algorithms. We incorporate network structure by formulating ranking as marginal inference in a Markov random field (MRF). Though inference is generally NP-hard, we apply a recently-developed polynomial-time approximation scheme (PTAS) to infer Bethe pseudomarginals. As a case study, we investigate the problem of ranking...

Graph-based recommender systems (GRSs) analyze the structural information available in graphical representation of data to make better recommendations, especially when direct user-item relation is sparse. Ranking-oriented GRSs mostly use preference (or rank) for measuring node similarities, from which they can infer recommendations using neighborhood-based methods. In this paper, we propose PGR...

Detecting critical power system events for Dynamic Security Assessment (DSA) is required for reliability improvement. The approach proposed in this paper investigates the effects of events on dynamic behavior during nonlinear system response while common approaches use steady-state conditions after events. This paper presents some new and enhanced indices for event ranking based on time-domain ...

Um kooperative Szenarien in der Präsenzlehre auf Basis mobiler Endgeräte erfolgreich durchführen zu können, müssen die unterschiedlichen Parameter einer Interaktion bekannt sein. Neben der eigentlichen Interaktionsmethode wie z.B. Brainstorming, Abstimmung (Voting) oder Ranking sollten die Akteure, die einzelnen Rollen, die Abfolge von Interaktionsschritten (Aktivitäten) und weitere Parameter k...