No abstract

The aim of this work is the analysis of permanent magnet synchronous machme under 4 # 0. 'Ihe new magnet materials have high remanence and 2. Mathematical Modeling coercitivity values and they can be used under other operation modes, without the demagnetization problem. Three operational modes and three contml philosophies are considered. A comparative study includes: the ripple and cogging torque, the ripple current, the power factor, the torque magnitude, the levels of voltage and current and step response time.This operation modes will be considered face the three control philosophies mentioned above. Figure 1 shows the scheme of the PMSM andThe quation can be written for terminal and torque:

This chapter investigates different aspects in the construction of a domain ontology to a content-based recommender system. The recommender systems suggests textual electronic documents from a Digital Library, based on documents read by the users and based on textual messages posted in electronic discussions through a web chat. The domain ontology is used to represent the user’s interest and the content of the documents. In this context, the ontology is composed by a hierarchy of concepts and keywords. Each concept has a vector of keywords with weights associated. Keywords are used to identify the content of the texts (documents and messages), through the application of text mining techniques. The chapter discusses different approaches for constructing the domain ontology, including the use of text mining software tools for supervised learning, the interference of domain experts in the engineering process and the use of a normalization step.

No abstract

Este artigo descreve o desenvolvimento de uma ferramenta para a identificação automática da expertise em curriculos (curriculo vitae) no formato Lattes. Esta identificação se dá através da extração de informações do arquivo XML gerado pela Plataforma Lattes. Uma vez feita à extração, são utilizadas técnicas de Text Mining de forma a fazer a associação dos dados extraidos a uma ontologia de domínio para a identificação das áreas de atuação e expertise dos usuários. Este trabalho esta sendo desenvolvido para dar auxilio ao Sistema de Recomendação para Apoio à Colaboração (SisRecCoI), desenvolvido pelo GPSI (Grupo de Pesquisa em Sistemas de Informação) da UCPel.