La traduction automatique statistique est un domaine très en demande et où les machines sont encore loin de produire des résultats de qualité humaine. La principale méthode utilisée est une traduction linéaire segment par segment d'une phrase, ce qui empêche de changer des parties de la phrase déjà traduites. La recherche pour ce mémoire se base sur l'approche utilisée dans Langlais, Patry et Gotti 2007, qui tente de corriger une traduction complétée en modifiant des segments suivant une fonction à optimiser. Dans un premier temps, l'exploration de nouveaux traits comme un modèle de langue inverse et un modèle de collocation amène une nouvelle dimension à la fonction à optimiser. Dans un second temps, l'utilisation de différentes métaheuristiques, comme les algorithmes gloutons et gloutons randomisés permet l'exploration plus en profondeur de l'espace de recherche et permet une plus grande amélioration de la fonction objectif. / Statistical Machine Translation is a field ingreat demand and where machines are still far from producing human-level results.The main method used is a segment by segment linear translation of a sentence, which prevents modification of already translated parts of the sentence. Research for this memoir is based on an approach used by Langlais, Patry and Gotti 2007, which tries to correct a completed translation by modifying segments following a function which needs to be optimized. As a first step, exploration of new traits such as an inverted language model and a collocation model brings a new dimension to the optimization function. As a second step, use of different metaheuristics, such as the greedy and randomized greedy algorithms, allows greater depth while exploring the search space and allows a greater improvement of the objective function.

Collocations are groups of words which are co-occurring more often than appearing separately. They also include phrases that give a new meaning to a group of unrelated words. This thesis is aimed to find collocations in large data and to create a database that allows their retrieval. The Pointwise Mutual Information, a value based on word frequency, is computed for finding the collocations. Words with the highest value of PMI are considered candidates for good collocations. Chosen collocations are stored in a database in a format that allows searching with Apache Lucene. A part of the thesis is to create a Web user interface as a quick and easy way to search collocations. If this service is fast enough and the collocations are good, translators will be able to use it for finding proper equivalents in the target language. Students of a foreign language will also be able to use it to extend their vocabulary. Such database will be created independently in several languages including Czech and English. Powered by TCPDF (www.tcpdf.org)

Ces dernières décennies, de nouvelles méthodes numériques connues sous le nom de « méthodes sans maillage » ont été développées. Contrairement à la MEF, ces méthodes n'utilisent qu'un ensemble de noeuds répartis dans le domaine sans demander un maillage de celui-ci. Jusqu'à présent, aucune de ces méthodes n'est parvenue à satisfaire les utilisateurs de la MEF. Dans cette thèse, nous proposons une méthode sans maillage, utilisant les approximations de Taylor. Cette méthode a l'avantage de n'utiliser que des points sur la frontière. En effet, l'EDP est résolue sous sa forme forte dans le domaine et les conditions aux limites sont appliquées par la méthode des moindres carrés. Cette méthode a été introduite, il y a 3 ans par S. Zeze dans sa thèse. Les tests académiques effectués en linéaire ont montré que cette méthode est très précise et que la convergence est améliorée en augmentant le degré, comme dans la p-version des EF. Nos travaux de thèse sont une suite des travaux de S. Zeze et ils visent à rendre plus robuste la méthode et aussi à élargir son champ d'application. Dans un premier temps, nous faisons une analyse mathématique de la méthode. Cette analyse passe par l'analyse des séries calculées. Le but de cette analyse est d'évaluer le domaine de convergence de la solution. Les résultats obtenus ont montré que pour certains problèmes, il faut subdiviser le domaine en quelques sous domaines et faire une résolution par sous domaine. La suite de nos travaux a donc été d'établir une technique de raccordement qui permettra d'assurer les conditions de transmission aux interfaces, dans le cas d'une résolution par sous domaine. En dernière partie, nous étendons l'application de la méthode aux problèmes non linéaires, en la couplant à une méthode de linéarisation / In these last decades, new numerical methods known as « meshless methods » have been developped. Contrary to the FEM, these methods uses only a set of nodes in the domain, without need of any mesh. Until now, any of these methods has convinced users of FEM. In this paper, we present a new meshless method using Taylor series expansion. In this method, the PDE is solved quasi exactly in the domain and the boundary conditions are applied by using a least square method. Then only the boundary discretisation is needed so the proposed method is a « true boundary meshless method ». This technique has been proposed for the first time by S. Zeze in his PhD thesis. The study of some linear problems has shown that this technique leads to a very good accuracy and that the convergence can be improved by increasing approximation degree. Our work is a continuation of S. Zeze work, and it consists to make the proposed method more robust and to extend its range of application. For that, we first make an analysis of the series computed by the method. The aim of this analysis was to evaluate the domain of validity of these series. This analysis showed that, for some problems, an accuracy cannot be obtained without splitting the domain in subdomains and making a resolution by subdomains. Therefore the second part of our work was to define a technique which will ensure the continuity at the interface between subdomains, in the case of a resolution by subdomains. The last part of our work was dedicated to non-linear problems. We establish an algorithm to show how the proposed method can deal with nonlinear-problems

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Este trabalho lida com unidades lexicais compostas por mais de uma palavra usadas com função referencial,ou seja, cada uma dessas unidades lexicais constitui um nome. Em uma sala de aula de ensino de língua inglesa para brasileiros, observou-se como o fato de o aluno 'enxergar' essas unidades lexicais pode ajudá-lo a ler um texto. / This study is about multi-word lexical units which have referential meaning, i.e., each unit is used as a name. In an English teaching classroom for Brazilian students it was noticed that making students aware of such lexical units may help them read a text.

O objetivo deste trabalho é apresentar uma proposta para o ensino de colocações adverbiais em inglês, típicas da área de negócios, à luz da Linguística de Corpus. Para isso, compilamos um corpus monolíngue em inglês britânico e americano, composto de periódicos de negócios e relatórios de empresas disponíveis on-line, num total de 2.310.143 palavras. Com a ajuda do Wordsmith Tools 5.0 e de cálculos estatísticos (escores T e Informação Mútua), levantamos as vinte e cinco colocações adverbiais mais recorrentes no corpus de estudo e as analisamos quanto aos padrões léxicogramaticais. Feita a análise, selecionamos dentre essas unidades colocacionais aquelas que poderiam ser abordadas em sala de aula, segundo os critérios estabelecidos pela pesquisadora, com base na abordagem DDL de Tim Johns (1991), na modelagem de Carter (1998) e nas críticas feitas ao uso das linhas de concordância no ensino de línguas. Elaboramos, assim, exercícios que foram aplicados em três estudos-piloto, realizados com alunos de inglês para negócios de um instituto de idiomas privado, nos seguintes níveis: pré-intermediário, intermediário e intermediário superior. Nos três estudos, comprovamos a aplicabilidade dos exercícios e a importância da Linguística de Corpus como abordagem ao ensino de línguas. / The aim of this work is to put forward a proposal for teaching typical adverbial collocations in Business English, based on Corpus Linguistics principles. To accomplish that, we compiled a monolingual corpus in British and American English, composed of business press texts as well as company reports available on-line, totalling 2,310,429 words. With the use of Wordsmith Tools 5.0 and statistical scores (T-score and Mutual Information), we found the twenty-five most frequent adverbial collocations, which were lexically and grammatically analysed concerning their patterns. Next, from these collocational units we selected the ones which could be approached in class, following the criteria set by the researcher, based on Tim Johns DDL (JOHNS, 1991), Carters modelling (CARTER, 1998) and the objections raised concerning the use of concordance lines for language teaching. Thus, we planned exercises to be applied in three pilot studies, carried out with Business English students at a private language school in São Paulo, Brazil, at the following levels: preintermediate, intermediate and upper-intermediate. The three studies demonstrated that such exercises can be successfully used in Business English classes thus confirming the relevance of Corpus Linguistics as an approach to language teaching.

A presente pesquisa pertence à área de conhecimento chamada Lexicografia e trata da inserção de colocações verbais em dicionários bilíngües e bilemáticos de alemão-português. Tendo em vista que a maioria dos livros didáticos de alemão como língua estrangeira não dá um tratamento adequado a elas, é necessário que o aprendiz procure-as nos dicionários, tanto no momento da decodificação, quanto no da codificação de textos. Essa pesquisa levantou certo número de colocações verbais consideradas fundamentais na formação de um vocabulário-base em situações rotineiras de comunicação, verificando em três dicionários se elas ocorrem e como ocorrem, na tentativa de estabelecer até que ponto tais dicionários se constituem numa ajuda efetiva não só na compreensão, como (principalmente) na produção de textos. / This research belongs to the area of knowledge called Lexicography and treats of the insertions of verbal collocations in bilingual and bilemmatical German- Portuguese dictionaries. Considering that the majority of the didactic books of German as foreign language does not treat them properly, it is necessary that the learner looks them up in dictionaries at the moment of the decoding as well as when coding texts. For this research we selected a certain number of verbal collocations considered fundamental to the formation of a basic vocabulary for routine communication situations, checking in three dictionaries if they occur and how they occur, in an attempt to establish how these dictionaries represent an effective help not only for comprehension but also for text production.

Este trabalho lida com unidades lexicais compostas por mais de uma palavra usadas com função referencial,ou seja, cada uma dessas unidades lexicais constitui um nome. Em uma sala de aula de ensino de língua inglesa para brasileiros, observou-se como o fato de o aluno 'enxergar' essas unidades lexicais pode ajudá-lo a ler um texto. / This study is about multi-word lexical units which have referential meaning, i.e., each unit is used as a name. In an English teaching classroom for Brazilian students it was noticed that making students aware of such lexical units may help them read a text.

O objetivo deste trabalho é apresentar uma proposta para o ensino de colocações adverbiais em inglês, típicas da área de negócios, à luz da Linguística de Corpus. Para isso, compilamos um corpus monolíngue em inglês britânico e americano, composto de periódicos de negócios e relatórios de empresas disponíveis on-line, num total de 2.310.143 palavras. Com a ajuda do Wordsmith Tools 5.0 e de cálculos estatísticos (escores T e Informação Mútua), levantamos as vinte e cinco colocações adverbiais mais recorrentes no corpus de estudo e as analisamos quanto aos padrões léxicogramaticais. Feita a análise, selecionamos dentre essas unidades colocacionais aquelas que poderiam ser abordadas em sala de aula, segundo os critérios estabelecidos pela pesquisadora, com base na abordagem DDL de Tim Johns (1991), na modelagem de Carter (1998) e nas críticas feitas ao uso das linhas de concordância no ensino de línguas. Elaboramos, assim, exercícios que foram aplicados em três estudos-piloto, realizados com alunos de inglês para negócios de um instituto de idiomas privado, nos seguintes níveis: pré-intermediário, intermediário e intermediário superior. Nos três estudos, comprovamos a aplicabilidade dos exercícios e a importância da Linguística de Corpus como abordagem ao ensino de línguas. / The aim of this work is to put forward a proposal for teaching typical adverbial collocations in Business English, based on Corpus Linguistics principles. To accomplish that, we compiled a monolingual corpus in British and American English, composed of business press texts as well as company reports available on-line, totalling 2,310,429 words. With the use of Wordsmith Tools 5.0 and statistical scores (T-score and Mutual Information), we found the twenty-five most frequent adverbial collocations, which were lexically and grammatically analysed concerning their patterns. Next, from these collocational units we selected the ones which could be approached in class, following the criteria set by the researcher, based on Tim Johns DDL (JOHNS, 1991), Carters modelling (CARTER, 1998) and the objections raised concerning the use of concordance lines for language teaching. Thus, we planned exercises to be applied in three pilot studies, carried out with Business English students at a private language school in São Paulo, Brazil, at the following levels: preintermediate, intermediate and upper-intermediate. The three studies demonstrated that such exercises can be successfully used in Business English classes thus confirming the relevance of Corpus Linguistics as an approach to language teaching.

As a lingua franca across the globe, English plays a vital role in international communications. Due to rapid economic, political, and educational globalization, the English language has become a powerful means of communication. Therefore, English education is vital to the development of many countries around the world. Since 1932, the need for a lingua franca in Saudi Arabia developed as the country progressed politically, economically, and educationally. Now, English is important to Saudis’ economic, educational, and career development and success. Vocabulary is a major step in learning any language. By deepening students’ lexical knowledge, they will be able to use English accurately to express themselves. However, teaching words in isolation and through memorization is not highly effective; English-as-a-foreign-language (EFL) learners need to interact with the language and its usage in a more profound way. This can be done by integrating corpora and stylistics analysis in an EFL curriculum. The importance of stylistics analysis to literary texts in the EFL classroom lies in the way that EFL learners will be exposed to authentic language. At the same time they will get insight into how English is structured; and by accessing corpora, which provide a wide range of data for the analysis of stylistics, students will be able to compare the lexical and grammatical patterns in authentic texts. Also, it is important to introduce students to the different levels of English (i.e. semantic, lexis, morphology); this will enlarge EFL learners’ knowledge of English vocabulary and various grammatical patterns. This project offers an innovative perspective on how to teach English for EFL university-level students by using corpora in a lexicalized stylistics approach, which will enable EFL learners to acquire vocabulary by reading literary texts. This provides a rich environment of lexical items and a variety of grammatical patterns. This approach offers EFL learners analytical tools that will improve their linguistic skills as they interact with and analyze authentic examples of English and gain insight about its historical, social and cultural background.