TAILIEUCHUNG - Báo cáo khoa học: "A Joint Sequence Translation Model with Integrated Reordering"

We present a novel machine translation model which models translation by a linear sequence of operations. In contrast to the “N-gram” model, this sequence includes not only translation but also reordering operations. Key ideas of our model are (i) a new reordering approach which better restricts the position to which a word or phrase can be moved, and is able to handle short and long distance reorderings in a unified way, and (ii) a joint sequence model for the translation and reordering probabilities which is more flexible than standard phrase-based MT. . | A Joint Sequence Translation Model with Integrated Reordering Nadir Durrani Helmut Schmid Alexander Fraser Institute for Natural Language Processing University of Stuttgart durrani schmid fraser @ Abstract We present a novel machine translation model which models translation by a linear sequence of operations. In contrast to the N-gram model this sequence includes not only translation but also reordering operations. Key ideas of our model are i a new reordering approach which better restricts the position to which a word or phrase can be moved and is able to handle short and long distance reorderings in a unified way and ii a joint sequence model for the translation and reordering probabilities which is more flexible than standard phrase-based MT. We observe statistically significant improvements in BLEU over Moses for German-to-English and Spanish-to-English tasks and comparable results for a French-to-English task. 1 Introduction We present a novel generative model that explains the translation process as a linear sequence of operations which generate a source and target sentence in parallel. Possible operations are i generation of a sequence of source and target words ii insertion of gaps as explicit target positions for reordering operations and iii forward and backward jump operations which do the actual reordering. The probability of a sequence of operations is defined according to an N-gram model . the probability of an operation depends on the n 1 preceding operations. Since the translation generation and reordering operations are coupled in a single generative story the reordering decisions may depend on preceding translation decisions and translation decisions may 1045 depend on preceding reordering decisions. This provides a natural reordering mechanism which is able to deal with local and long-distance reorderings in a consistent way. Our approach can be viewed as an extension of the N-gram SMT approach Marino et al. 2006 but our

TÀI LIỆU LIÊN QUAN
TỪ KHÓA LIÊN QUAN
TAILIEUCHUNG - Chia sẻ tài liệu không giới hạn
Địa chỉ : 444 Hoang Hoa Tham, Hanoi, Viet Nam
Website : tailieuchung.com
Email : tailieuchung20@gmail.com
Tailieuchung.com là thư viện tài liệu trực tuyến, nơi chia sẽ trao đổi hàng triệu tài liệu như luận văn đồ án, sách, giáo trình, đề thi.
Chúng tôi không chịu trách nhiệm liên quan đến các vấn đề bản quyền nội dung tài liệu được thành viên tự nguyện đăng tải lên, nếu phát hiện thấy tài liệu xấu hoặc tài liệu có bản quyền xin hãy email cho chúng tôi.
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.