Sistema especialista fuzzy para dimensionamento de bombeio mecânico

Despite the emergence of other forms of artificial lift, sucker rod pumping systems remains hegemonic because of its flexibility of operation and lower investment cost compared to other lifting techniques developed. A successful rod pumping sizing necessarily passes through the supply of estimated flow and the controlled wear of pumping equipment used in the mounted configuration. However, the mediation of these elements is particularly challenging, especially for most designers dealing with this work, which still lack the experience needed to get good projects pumping in time. Even with the existence of various computer applications on the market in order to facilitate this task, they must face a grueling process of trial and error until you get the most appropriate combination of equipment for installation in the well. This thesis proposes the creation of an expert system in the design of sucker rod pumping systems. Its mission is to guide a petroleum engineer in the task of selecting a range of equipment appropriate to the context provided by the characteristics of the oil that will be raised to the surface. Features such as the level of gas separation, presence of corrosive elements, possibility of production of sand and waxing are taken into account in selecting the pumping unit, sucker-rod strings and subsurface pump and their operation mode. It is able to approximate the inferente process in the way of human reasoning, which leads to results closer to those obtained by a specialist. For this, their production rules were based on the theory of fuzzy sets, able to model vague concepts typically present in human reasoning. The calculations of operating parameters of the pumping system are made by the API RP 11L method. Based on information input, the system is able to return to the user a set of pumping configurations that meet a given design flow, but without subjecting the selected equipment to an effort beyond that which can bear

Querido diário: a construção identitária de alunos da EJA em diários pessoais

This study aims to present analyses of our research, documentary type, which investigates the construction of cultural identities of the Youth and Adults Education (Educação de Jovens e Adultos – EJA), level III, in a public school in the city of Natal/RN, through personal diaries produced in the school environment. In a qualitative-interpretive approach, we anchor our identity studies (BAUMAN, 2001, 2005, 2006; HALL, 1987, 1997, 2011, 2012) that bring us the idea that identities are built and rebuilt by social relations that we do. To this end, we start from a conception of language that does not require pre-conceptions because they are based on the utterance itself. Therefore, we have analyzed the utterances produced by these students from the perspective of Bakhtin Circle (BAKHTIN, 1988, 1993, 1998, 2002, 2010, 2012), which deals with the discursive construction emerging from intersubjective processes of verbal interaction, in a dialogical relationship of the self to the other, by the otherness and the heteroglossia. Moreover, our study is also guided by the guidance on speech genres (BAKHTIN, 2010) and personal journal (LEJEUNE, 2008; MACHADO, 1998, 2009). We join to Applied Linguistics (MOITA LOPES, 2006, 2009) because we believe that this research focuses on a social practice in which language plays a central role and seeks to demonstrate how the speeches of the subject students of EJA, in personal journals, are building tools not only of their identities, but also knowledge and social life of the position that this subject student takes. We conclude this work in a perception of cultural identities that are built by the subject students of EJA, because the results suggest that the identities of these students are fluidly constructed by the representation that the student makes of his or her school, of being student of EJA and how he or she is a student of this educational modality. Thus, through our work, we plan to present another look about the identity or identities of a student of EJA, pointing an insight of this subject.