model information retrieval system

... Relating the new lan- guage models of information retrieval to the tradi- tional retrieval models: University of Twente [Host]; University of Twente, Centre for Telemat- ics and Information Technology, ... B. Croft, "A general language model for information retrieval, " 1999, pp. 316-321. G. Salton and M. J. McGill, Introduction to Modern Information Retrieval: McGraw-Hill, Inc. New York, ... AFNLP Optimizing Language Model Information Retrieval System with Expectation Maximization Algorithm Justin Liang-Te Chiu Department of Computer Science and Information Engineering, National...

Ngày tải lên: 08/03/2014, 01:20

Ngày tải lên: 24/03/2014, 05:21

Ngày tải lên: 24/03/2014, 03:20

... future IT system. System design documents and the system security plan can provide useful information about the security of an IT system that is in development. For an operational IT system, ... • System interfaces (e.g., internal and external connectivity) • Data and information • Persons who support and use the IT system • System mission (e.g., the processes performed by the IT system) ... mailings) • Information Assurance Vulnerability Alerts and bulletins for military systems • System software security analyses. 3.3.2 System Security Testing Proactive methods, employing system...

Ngày tải lên: 22/01/2014, 02:20

... trong truy xuất thông tin 1.1.1 Hệ thống truy xuất thông tin (Information Retrieval- IR) Hệ thống Truy xuất thông tin (Information Retrieval) là hệ thống thực hiện tìm kiếm tài liệu (thường là ... trên ontology và kết hợp với hệ thống truy xuất thông tin (Query Expansion Model with Ontology-Based with Information Retrieval, +IR OB QEM  ) - Mô hình mở rộng truy vấn dựa trên ontolgy kết ... xác xuất và tích hợp hệ thống truy xuất thông tin (Query Expansion Model with Ontology-Based and Probability with Information Retrieval, +IR OB P QEM   ) 2.4.2.2 Các bước thực hiện mở rộng...

Ngày tải lên: 17/02/2014, 08:47

... therefore df i,j = 0 . 3.3 SMART and BM25 tf.idf variants The SMART retrieval system by Salton (1971) is a retrieval system based on the vector space model (Salton and McGill, 1986). Salton and Buckley (1987) ... probabilistic model of information retrieval: de- velopment and comparative experiments. Inf. Pro- cess. Manage., 36(6):779–808. Chenghua Lin and Yulan He. 2009. Joint senti- ment/topic model for ... Robertson et al., 1996) is a probabilistic model for information retrieval and is one of the most popular and effective algorithms used in in- formation retrieval. For ease of reference, we in- corporate...

Ngày tải lên: 20/02/2014, 04:20

... the information retrieval (IR) paradigm which has also been used by some researchers. Several sentiment information retrieval models were proposed in the framework of probabilistic lan- guage models ... of Opinionated Information Retrieval which is planned to be a module in a Cross-Language Opinion Extrac- tion system (CLOE). The main goal of this system is to provide access to opinionated information ... Ming Zhou. 2000. On the use of words and n-grams for Chinese information retrieval. In Proceedings of the 5th International Workshop Information Retrieval with Asian Languages, pages 141–148. ACM Press, November. Bo...

Ngày tải lên: 20/02/2014, 12:20

... was used to evaluate the proposed strategies in CLIR. SMARTinformation retrieval system (Salton, 1971), which is based on vector space model, was used to retrieve English documents. Thus, Content ... Corpora to Cross-Language Information Retrieval: Hybrid Statistics-based and Linguistics-based Approach. In Proc. IRAL 2003, Sapporo, Japan. G. Salton. 1971. The SMART Retrieval System, Experi- ments ... and schemes of SMARTretrieval system for documents terms and query terms. The best performance was realized by ATN.NTC combined weighting scheme. The proposed two-stages model using comparable corpora...

Ngày tải lên: 20/02/2014, 16:20

... combination of alternative retrieval methods, creating a meta- search strategy which maximizes the contribution of each stream. Different information retrieval systems can used as indexing ... "Natural Language Information Retrieval: TREC°5 Report." Proceedings of TREC-5 confer° ence. Strzalkowski, Tomek. 1995. "Natural Language Information Re- trieval" Information Processing ... most relevant for generating summaries in contex~ of an information retrieval system. 1. Words and phrases frequergly occurring in a tex~ are likely to be indicative...

Ngày tải lên: 20/02/2014, 18:20

... content. For example, the pair retrieve +information is extracted from any of the fol- lowing fragments: information retrieval system; retrieval of information from databases; and informa- ... to as 'conceptual retrieval& apos;. The conceptual retrieval systems, though quite effective, are not yet mature enough to be con- sidered in serious information retrieval applications, ... Michael. 1991. " ;Retrieval Performance in Ferret: A Conceptual Information Retrieval System. " Proceedings of ACM SIGIR-91, pp. 347-355. Sager, Naomi. 1981. Natural Language Information Processing....

Ngày tải lên: 20/02/2014, 21:20

... 1979. Representation and classification of knowledge and information for use in interactive information re- trieval. In Human Aspects of Information Science. Oslo: Norwegian Library School. 148 ... multi-word concepts. Figure 4. Modifications to Text Analysis Program We have written alternative systems for each of the pro- posed modifications. In this experiment the original corpus of thirty ... incorporate insights about discourse without violating the cost -d volume constraints typical of DR systems. The modi~,cations are designed to recognize such aspects of discourse structure as establishment...

Ngày tải lên: 21/02/2014, 20:20

... creative information retrieval to explore how an IR system can itself provide a degree of creative anticipation, acting as a mediator between the lit- eral specification of a meaning and the retrieval ... 2011. c 2011 Association for Computational Linguistics Creative Language Retrieval: A Robust Hybrid of Information Retrieval and Linguistic Creativity Tony Veale School of Computer Science and ... Moreover, such systems tend to be developed in isolation, and are rarely designed to cohere as part of a larger frame- work of creative reasoning (e.g. Boden, 1994). In contrast, Information Retrieval...

Ngày tải lên: 07/03/2014, 22:20

... lecture. 3 Just-in-Time Retrieval Systems The first precursors to the ACLD were the Fixit query-free search system (Hart and Graham, 1997), the Remembrance Agent for just-in-time retrieval (Rhodes and ... Pattie Maes. 2000. Just-in-time information retrieval agents. IBM Systems Journal, 39(3-4):685–704. Bradley J. Rhodes. 1997. The Wearable Remembrance Agent: A system for augmented memory. Personal Technologies: ... the ACL-HLT 2011 System Demonstrations, pages 80–85, Portland, Oregon, USA, 21 June 2011. c 2011 Association for Computational Linguistics A Speech-based Just-in-Time Retrieval System using Semantic...

Ngày tải lên: 07/03/2014, 22:20

... Agency. 3 Document Retrieval Since information retrieval systems supply the ini- tial set of documents on which a question answer- ing system operates, it makes sense to optimize document retrieval performance ... techniques introduced in this paper are applicable to the different types of information needs discussed above. While information retrieval techniques form a strong baseline for answering relationship ... GALE program. All these trends point to same problem: how do we build advanced information systems to address complex information needs? The value of this work lies in the generality of IR-based...

Ngày tải lên: 08/03/2014, 02:21

... resources for information retrieval tasks. Natural language in- formation retrieval. Kluwer Academic Publishers Dordrecht, NL. Bruce Croft and John Lafferty. 2003. Language Mod- eling for Information Retrieval. ... out- comes confirm that our hypotheses hold in the context of Information Retrieval. 1 Introduction The task of an Information Retrieval (IR) system is to retrieve documents from a collection, in re- sponse ... of Informa- tion Retrieval, across two standard test collec- tions, and five statistically different term weight- ing schemes. Our hypotheses led to a general improvement in retrieval performance....

Ngày tải lên: 08/03/2014, 02:21

... Gross, M. "On the Equivalence of Models Used in the Fields of Mechanical Translation and Information Re- trieval." In Information Storage and Retrieval. Vol. 2. London: Pergamon Press, ... substitute the nominalization, etc., which represents it. 3. Information Retrieval from Texts Let us now turn to the problem of retrieving information from stored texts. As mentioned in Part 1, ... Computational Linguistics, vol.11, nos.1 and 2, March and June 1968] Paraphrase Generation and Information Retrieval from Stored Text by P. W. Culicover, IBM Boston Programming Center First the notion...

Ngày tải lên: 16/03/2014, 19:20

... applica- tions. A free version of SystemT is available at http://www.alphaworks.ibm.com/tech/systemt. 2 Overview of SystemT Figure 1 depicts the architecture of SystemT. The sys- tem consists of ... intermediate re- sults. The SystemT Runtime uses this information to implement garbage collection based on reference- counting. This garbage collection significantly re- duces the system s peak memory ... system s peak memory consumption, al- lowing SystemT to handle much larger documents than conventional IE systems. 6 The Development Environment The SystemT Development Environment assists a developer...

Ngày tải lên: 17/03/2014, 00:20

Ngày tải lên: 17/03/2014, 04:20

Ngày tải lên: 17/03/2014, 07:20

Ngày tải lên: 17/03/2014, 07:20