TAILIEUCHUNG - Báo cáo khoa học: "Alternative Phrases and Natural Language Information Retrieval"

This paper presents a formal analysis for a large class of words called alternative markers, which includes other(than), such(as), and besides. These words appear frequently enough in dialog to warrant serious attention, yet present natural language search engines perform poorly on queries containing them. I show that the performance of a search engine can be improved dramatically by incorporating an approximation of the formal analysis that is compatible with the search engine’s operational semantics. . | Alternative Phrases and Natural Language Information Retrieval Gann Bierner Division of Informatics University of Edinburgh gbierner@ Abstract This paper presents a formal analysis for a large class of words called alternative markers which includes other than such as and besides. These words appear frequently enough in dialog to warrant serious attention yet present natural language search engines perform poorly on queries containing them. I show that the performance of a search engine can be improved dramatically by incorporating an approximation of the formal analysis that is compatible with the search engine s operational semantics. The value of this approach is that as the operational semantics of natural language applications improve even larger improvements are possible. 1 Introduction Consider the following examples discovered in a corpus of queries submitted to the Electric Knowledge search engine12 the successor of the On Point natural language search system described in Cooper 1997 . Each consists of a query a response not shown and then a follow-up query. 1 What is the drinking age in Afghanistan What is the drinking age in other countries 2 Where can I find web browsers for download Where can I find other web browsers than Netscape for download 3 Where can I find a list of all the shoe manufacturers in the world Where can I find shoes made by Buffalino such as the Bushwackers 4 Where are online auctions indexed Are there other auction search engines besides BidFind 1 formerly known as The Electric Monk 2 http In each case particular words are used to constrain the space of appropriate answers . such as other than and besides. I call these words and others like them alternative markers and alternative markers along with their syntactic argument . other countries I call alternative phrases. Alternative phrases that are closely bound to the noun phrase to which they refer like those above I call connected .

• Báo cáo khoa học
• Alternative Phrases
• Natural Language
• Information Retrieval
• báo cáo khoa học
• mô hình ngôn ngữ
• xử lý ngôn ngữ tự nhiên
• Bài giảng Xử lý ngôn ngữ tự nhiên
• Ngôn ngữ tự nhiên
• Kỹ thuật lập trình
• Xử lý nhập nhằng ngữ nghĩa
• Xử lý ngữ nghĩa
• Xử lý ngôn ngữ
• Natural Language Processing
• Ngôn ngữ lập trình
• Nhập nhằng cấu trúc
• Tri thức về ngôn ngữ
• Mô hình n gram
• Dịch máy
• Phương pháp dịch máy
• Hiểu ngôn ngữ
• Phân tích ngữ nghĩa
• Phân loại tin tự động
• Biểu diễn vị từ
• Thuộc tính về sự kiện
• Thuộc tính về sự kiện
• Mô hình ngôn ngữ Google Book N grams
• Mô hình ngôn ngữ KenLM
• Phương pháp làm mịn
• Tách từ tiếng Việt
• Gán nhãn từ loại
• Phân tích cú pháp
• Nghĩa từ vựng
• Phân giải nhập nhằng từ
• Phân loại văn bản
• Lexical chain
• Phản hồi thông tin
• Bài toán PTCP
• Cấu trúc ngữ pháp
• Phân tích cú pháp xác suất
• CKY kết hợp xác suất
• Văn phạm phi ngữ cảnh xác suất
• Hình thái học