3 resultados para Supervised and Unsupervised Classification
em Repositório Científico da Universidade de Évora - Portugal
Resumo:
In this paper, we describe one of the approaches of the participation of Universidade de Évora. Our approach is similar to usual methods where text is preprocessed, features are extracted, and then used in SVMs with cross validation. The main difference is that features used come from averages of word embeddings, specifically word2vec vectors. Using PAN 2016 dataset, we were able to achieve 44.8% and 68.2% for English age and gender classification respectively. We were also able to achieve 51.3% and 67.1% accuracy for Spanish age and gender classification. Finally, we report 71.9% accuracy for Dutch age classification.
Resumo:
This paper describes various experiments done to investigate author profiling of tweets in 4 different languages – English, Dutch, Italian, and Spanish. Profiling consists of age and gender classification, as well as regression on 5 different person- ality dimensions – extroversion, stability, agreeableness, open- ness, and conscientiousness. Different sets of features were tested – bag-of-words, word ngrams, POS ngrams, and average of word embeddings. SVM was used as the classifier. Tfidf worked best for most English tasks while for most of the tasks from the other languages, the combination of the best features worked better.
Resumo:
Este estudo, configurou uma investigação de perfil misto, procurando congregar contributos qualitativos e quantitativos, tem como principal objetivo à análise do Ensino Médio brasileiro tentando verificar se as metas que este nível de ensino preconiza estão atendendo às expectativas educacionais de um público diversificado de alunos numa escola pública de Fortaleza. Para tal, realizamos a análise de entrevistas semiestruturadas a doze professores, e aplicamos questionários a 60 professores. Procedemos, também, à análise documental do Projeto Político Pedagógico da escola, das Diretrizes Curriculares e Orientações Curriculares Nacionais para o Ensino Médio, do Mapa Curricular da escola, bem como, o Relatório de notas dos alunos e a classificação dos mesmos no Exame Nacional do Ensino Médio (ENEM) referentes ao ano de 2012. O estudo evidencia a importância das estratégias de ensino, nomeadamente, a meritocracia no contexto escolar, a avaliação interna e externa nas dimensões: ensino aprendizagem e resultados do rendimento escolar, formação e prática docente, o trabalho da equipe escolar, a estrutura da escola, e ainda, a gestão e autonomia nas escolas, mas principalmente, as ideias dos participantes do estudo sobre a importância de trabalhar com uma estrutura de ensino vocacionado composto por áreas e disciplinas que atenda as intenções profissionais e acadêmicas do aluno; ABSTRACT: This study, set up a mixed profile research, looking gather qualitative and quantitative contributions, aims to analyze the Brazilian high school trying to understand if the goals that this level of education advocates are meeting the educational expectations of a diverse audience of students in public school in Fortaleza. To this end, we conducted semi-structured interviews to twelve teachers, e apply questionnaires to 60 teachers. Proceeded, too, the documentary analysis of the school Pedagogical Policy Project, the National Curriculum Guidelines and Curriculum Guidelines for Secondary Education, Curriculum Map of the school and the students' notes Report and the classification thereof in the Exame Nacional do Ensino Médio (ENEM) the brazilian national examination to High School graduates for the year 2012. The study highlights the importance of teaching strategies in particular meritocracy in the school context, internal and external evaluation dimensions: teaching and learning results in school performance, training and teaching practice, the work of the school team, the school structure, and also the management and autonomy in schools, but mainly the ideas of the study participants about on the importance of working with a vocationed teaching structure consists of areas and disciplines that will meet future professional and academic intentions of the student.