Deriving a Representative Vector for Ontology Classes with Instance Word Vector Embeddings

Selecting a representative vector for a set of vectors is a very common requirement in many algorithmic tasks. Traditionally, the mean or median vector is selected. Ontology classes are sets of homogeneous instance objects that can be converted to a vector space by word vector embeddings. This study proposes a methodology to derive a representative vector for ontology classes whose instances were converted to the vector space. We start by deriving five candidate vectors which are then used to train a machine learning model that would calculate a representative vector for the class. We show that our methodology out-performs the traditional mean and median vector representations

A Hybrid Adaptive Educational eLearning Project based on Ontologies Matching and Recommendation System

The implementation of teaching interventions in learning needs has received considerable attention, as the provision of the same educational conditions to all students, is pedagogically ineffective. In contrast, more effectively considered the pedagogical strategies that adapt to the real individual skills of the students. An important innovation in this direction is the Adaptive Educational Systems (AES) that support automatic modeling study and adjust the teaching content on educational needs and students' skills. Effective utilization of these educational approaches can be enhanced with Artificial Intelligence (AI) technologies in order to the substantive content of the web acquires structure and the published information is perceived by the search engines. This study proposes a novel Adaptive Educational eLearning System (AEeLS) that has the capacity to gather and analyze data from learning repositories and to adapt these to the educational curriculum according to the student skills and experience. It is a novel hybrid machine learning system that combines a Semi-Supervised Classification method for ontology matching and a Recommendation Mechanism that uses a hybrid method from neighborhood-based collaborative and content-based filtering techniques, in order to provide a personalized educational environment for each student

An Ontology Mapping Method Based on Support Vector Machine

Abstract. Ontology mapping has been applied widely in the field of semantic web. In this paper a new algorithm of ontology mapping were achieved. First, the new algorithms of calculating four individual similarities (concept name, property, instance and structure) between two concepts were mentioned. Secondly, the similarity vectors consisting of four weighted individual similarities were built, and the weights are the linear function of harmony and reliability, and the linear function can measure the importance of individual similarities. Here, each of ontology concept pairs was represented by a similarity vector. Lastly, Support Vector Machine (SVM) was used to accomplish mapping discovery by training the similarity vectors. Experimental results showed that, in our method, precision, recall and f-measure of ontology mapping discovery reached 95%, 93.5 % and 94.24%, respectively. Our method outperformed other existing methods. Introduction: In this paper, our study mainly is to discover the mapping [1] between concepts belonging to the different ontologies respectively. The proposed algorith