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Text mining in negative relevance feedback

Web Intelligence and Agent Systems 2012年第2期10卷 151-163页

作者： Algarni, Abdulmohsen Li, Yuefeng Wu, Sheng-Tang Xu, Yue School of Electrical Engineering and Computer Science Faculty of Science and Engineering Queensland University of Technology Brisbane QLD 4001 Australia Dept. of Applied Informatics and Multimedia Asia University Taichung Taiwan

It is a big challenge to clearly identify the boundary between positive and negative streams. Several attempts have used negative feedback to solve this challenge;however, there are two issues for using negative relevance feedback to improve the effectiveness of information filtering. The first one is how to select constructive negative samples in order to reduce the space of negative documents. The second issue is how to decide noisy extracted features that should be updated based on the selected negative samples. This paper proposes a pattern mining based approach to select some offenders from the negative documents, where an offender can be used to reduce the side effects of noisy features. It also classifies extracted features (i.e., terms) into three categories: positive specific terms, general terms, and negative specific terms. In this way, multiple revising strategies can be used to update extracted features. An iterative learning algorithm is also proposed to implement this approach on RCV1, and substantial experiments show that the proposed approach achieves encouraging performance. © 2012 - IOS Press and the authors. All rights reserved.

关键词： Information filtering

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A Security enhancement on a remote user authentication scheme based on the Rabin cryptosystem with secure password updating

A Security enhancement on a remote user authentication schem...

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26th IEEE International Conference on Advanced Information Networking and Applications Workshops, WAINA 2012

作者： Tai, Wei-Liang Chang, Ya-Fen Li, Yuan-Fu Pan, Shun-Meng Dept. of Biomedical Informatics Asia University Taichung Taiwan Dept. of Computer Science and Information Engineering National Taichung University of Science and Technology Taichung Taiwan

ISBN: (纸本)9780769546520

User authentication plays an important role to ensure that only authorized users can access resources. Kim et al. proposed a remote user authentication scheme based on the Rabin cryptosystem to resist well-known attack such as offline password guessing attack, unlimited online password guessing attack and server impersonation. In their scheme, a user will be issued a smart card for authentication, and the computation load of the smart card is light. Although their scheme possesses superior properties, we find that it suffers from one fatal security flaw such that a legal user cannot access resources after password change phase. In this paper, we first show the security flaw and propose an improvement with secure password updating. © 2012 IEEE.

关键词： Authentication

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HERMES: A tool for querying heterogeneous data stores

HERMES: A tool for querying heterogeneous data stores

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2012 16th Panhellenic Conference on informatics, PCI 2012

作者： Keramopoulos, Euclid Dervos, Dimitris Deligiannis, Ignatios Evangelidis, Georgios Pouyioutas, Philippos Dept. of Information Technology Alexander TEI of Thessaloniki Thessaloniki Greece Dept. of Applied Informatics University of Macedonia Thessaloniki Greece Dept. of Computer Science University of Nicosia Nicosia Cyprus

ISBN: (纸本)9780769548258

Data are organized/stored in a plethora of different databases, locations and data models. In many cases, companies and organizations utilize data stored in a variety of data models at remote database servers. A challenge would be to construct queries that join data from such disparate sources. In this paper, we report on research work relating to graphical query languages and data modeling. More specifically, we report on a new software tool for the novice user, one that transforms databases of different data models (Relational, Object-Relational, Object-Oriented) into an equivalent XML model, plus on a new graphical XQuery type query language that facilitates the construction of user queries that join data from different data models. © 2012 IEEE.

关键词： Object-oriented databases

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Cyclic steady state refinement: Multimodal processes perspective

Cyclic steady state refinement: Multimodal processes perspec...

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IFIP WG 5.7 International Conference on Advances in Production Management Systems, Value Networks: Innovation, Technologies, and Management, APMS 2011

作者： Bocewicz, Grzegorz Nielsen, Peter Banaszak, Zbigniew A. Dang, Vinh Quang Koszalin University of Technology Dept. of Computer Science and Management Koszalin Poland Dept. of Mechanical and Manufacturing Engineering Aalborg University Denmark Warsaw University of Technology Faculty of Management Dept. of Business Informatics Warsaw Poland

ISBN: (纸本)9783642339790

The cyclic scheduling problem modeled in terms of Cyclic Concurrent Process Systems is considered. The problem can be seen as a kind of Diophantine problem, hence its solvability, i.e. schedulability, plays a pivotal role in many supply-chain problems. In contradiction to the traditionally offered solutions the approach proposed allows one to take into account such behavioral features as transient periods and deadlocks occurrence. So, the contribution's aim is the modeling framework enabling an evaluation of cyclic scheduling problems solvability, i.e., the declarative approach to reachability problems regarding cyclic steady states determination as well as conditions guaranteeing assumed performance of multimodal processes executed within a concurrent cyclic processes environment. © 2012 IFIP International Federation for Information Processing.

关键词： Supply chains

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Optimal social choice functions: A utilitarian view 12

Optimal social choice functions: A utilitarian view

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13th ACM Conference on Electronic Commerce, EC '12

作者： Boutilier, Craig Caragiannis, Ioannis Haber, Simi Lu, Tyler Procaccia, Ariel D. Sheffet, Or Dept. of Computer Science University of Toronto Toronto ON Canada Computer Technology Institute Dept. of Computer Engineering and Informatics University of Patras Patras Greece Dept. of Mathematical Sciences Carnegie Mellon University Pittsburgh PA United States Computer Science Dept. Carnegie Mellon University Pittsburgh PA United States

ISBN: (纸本)9781450314152

We adopt a utilitarian perspective on social choice, assuming that agents have (possibly latent) utility functions over some space of alternatives. For many reasons one might consider mechanisms, or social choice functions, that only have access to the ordinal rankings of alternatives by the individual agents rather than their utility functions. In this context, one possible objective for a social choice function is the maximization of (expected) social welfare relative to the information contained in these rankings. We study such optimal social choice functions under three different models, and underscore the important role played by scoring functions. In our worst-case model, no assumptions are made about the underlying distribution and we analyze the worst-case distortion - -or degree to which the selected alternative does not maximize social welfare - -of optimal social choice functions. In our average-case model, we derive optimal functions under neutral (or impartial culture) distributional models. Finally, a very general learning-theoretic model allows for the computation of optimal social choice functions (i.e., that maximize expected social welfare) under arbitrary, sampleable distributions. In the latter case, we provide both algorithms and sample complexity results for the class of scoring functions, and further validate the approach empirically. © 2012 ACM.

关键词： Computational complexity

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An application-oriented review of CogInfoCom: The state-of-the-art and future perspectives

An application-oriented review of CogInfoCom: The state-of-t...

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10th IEEE Jubilee International Symposium on Applied Machine Intelligence and informatics, SAMI 2012

作者： Csapo, Adam Baranyi, Peter Budapest University of Technology and Economics Dept. of Telecommunications and Media Informatics Budapest Hungary Computer and Automation Research Institute Budapest Hungary

ISBN: (纸本)9781457701979

Cognitive Infocommunications (CogInfoCom) is an emerging discipline that investigates synergies between infocommunications and the cognitive sciences, with the goal of creating engineering applications in which systems with various levels of cognitive capability are enabled to work together more effectively. While infocommunications deals with the error-free encoding, transmission and decoding of raw data, CogInfoCom aims to transmit information at a higher, conceptual level in a way that appeals to the receiver's cognitive capabilities. Thus, CogInfoCom may have implications for a wide variety of fields in the future, including virtual reality, 3D Internet and Internet of Things. In this paper, we provide a brief, application-oriented overview of the existing background of CogInfoCom, and outline future perspectives for the field. © 2012 IEEE.

关键词： Virtual reality

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CogInfoCom channels and related definitions revisited

CogInfoCom channels and related definitions revisited

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2012 IEEE 10th Jubilee International Symposium on Intelligent Systems and informatics, SISY 2012

ISBN: (纸本)9781467347518

An important challenge in CogInfoCom is to design multi-sensory signals which are capable of communicating high-level information to users. The concept of CogInfoCom channels was proposed in order to facilitate both theoretical and practical investigations in this direction. A number of aspects of CogInfoCom channels have been treated in earlier papers, however, some of the related definitions have recently undergone changes. The goal of this paper is to concisely summarize the current state of research on CogInfoCom channels. © 2012 IEEE.

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On Achieving All-Optical Failure Restoration via Monitoring Trails

On Achieving All-Optical Failure Restoration via Monitoring ...

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IEEE INFOCOM Conference

作者： Janos Tapolcai Pin-Han Ho Peter Babarczi Lajos Ronyai MTA-BME Future Internet Research Group High-Speed Networks Laboratory (HSNLab) Dept. of Telecommunications and Media Informatics Budapest University of Technology Dept. of Electrical and Computer Engineering University of Waterloo Canada Computer and Automation Research Institute Hungarian Academy of Sciences and BME

ISBN: (纸本)9781467359443

The paper investigates a novel monitoring trail (m-trail) scenario that can enable any shared protection scheme for achieving all-optical and ultra-fast failure restoration. Given a set of working (W-LPs) and protection (P-LPs) lightpaths, we firstly define the neighborhood of a node, which is a set of links whose failure states should be known to the node in restoration of the corresponding W-LPs. A set of m-trails is routed such that each node can localize any failure in its neighborhood according to the ON-OFF status of the traversing m-trails. Bound analysis is performed on the minimum bandwidth required for the m-trails. Extensive simulation is conducted to verify the proposed scheme.

关键词： Line of nodes restoration trails bandwidth requirement

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Feature ranking methods used for selection of prototypes

Feature ranking methods used for selection of prototypes

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22nd International Conference on Artificial Neural Networks, ICANN 2012

作者： Blachnik, Marcin Duch, Wlodzislaw Maszczyk, Tomasz Department of Informatics Nicolaus Copernicus University Toruń Poland School of Computer Engineering Nanyang Technological University Singapore Dept. of Management and Informatics Silesian University of Technology Katowice Poland

ISBN: (纸本)9783642332654

Prototype selection, as a preprocessing step in machine learning, is effective in decreasing the computational cost of classification task by reducing the number of retained instances. This goal is obtained by shrinking the level of noise and rejecting the irrelevant data. Prototypes may be also used to understand the data through improving comprehensibility of results. In the paper we discus an approach for instance selection based on techniques known from feature selection pointing out the dualism between feature and instance selection. Finally some experiments are shown which uses feature ranking methods for instance selection. © 2012 Springer-Verlag.

关键词： Feature Selection

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Interexchange museum database via web service

Interexchange museum database via web service

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2012 Annual SRII Global Conference, SRII 2012

作者： Kovavisaruch, L. Sornlertlamvanich, V. Kamolvej, P. Iamrahong, N. Prommoon, G. Digital Media Informatics Lab National Electronics and Computer Technology Center Pathumthani Thailand Dept. of Science Kasetsart University Bangkok Thailand

ISBN: (纸本)9780769547701

This paper is a conceptual presentation of a standardized museum database capable of exchanging information across various museum exhibitions in different countries. The design is a result of a study conducted on the database for cultural and artistic museum collections from multiple agencies. The study proposes a standardized database containing a collection of common, required information among museums, as well as additional related information. Implementation of the conceptual database design is expected to ensure important information is not lost during data exchange, allow remote database searches from one museum to another, and enable the exchange of cultural and artistic information internationally between countries that employ the same standard. © 2012 IEEE.

关键词： Electronic data interchange

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