228,910 research outputs found
Structure Selection from Streaming Relational Data
Statistical relational learning techniques have been successfully applied in
a wide range of relational domains. In most of these applications, the human
designers capitalized on their background knowledge by following a
trial-and-error trajectory, where relational features are manually defined by a
human engineer, parameters are learned for those features on the training data,
the resulting model is validated, and the cycle repeats as the engineer adjusts
the set of features. This paper seeks to streamline application development in
large relational domains by introducing a light-weight approach that
efficiently evaluates relational features on pieces of the relational graph
that are streamed to it one at a time. We evaluate our approach on two social
media tasks and demonstrate that it leads to more accurate models that are
learned faster
Computer Administering of the Psychological Investigations: Set-relational Representation
Computer administering of a psychological investigation is the computer
representation of the entire procedure of psychological assessments - test
construction, test implementation, results evaluation, storage and maintenance
of the developed database, its statistical processing, analysis and
interpretation. A mathematical description of psychological assessment with the
aid of personality tests is discussed in this article. The set theory and the
relational algebra are used in this description. A relational model of data,
needed to design a computer system for automation of certain psychological
assessments is given. Some finite sets and relation on them, which are
necessary for creating a personality psychological test, are described. The
described model could be used to develop real software for computer
administering of any psychological test and there is full automation of the
whole process: test construction, test implementation, result evaluation,
storage of the developed database, statistical implementation, analysis and
interpretation. A software project for computer administering personality
psychological tests is suggested
Statistical Inference for Valued-Edge Networks: Generalized Exponential Random Graph Models
Across the sciences, the statistical analysis of networks is central to the
production of knowledge on relational phenomena. Because of their ability to
model the structural generation of networks, exponential random graph models
are a ubiquitous means of analysis. However, they are limited by an inability
to model networks with valued edges. We solve this problem by introducing a
class of generalized exponential random graph models capable of modeling
networks whose edges are valued, thus greatly expanding the scope of networks
applied researchers can subject to statistical analysis
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