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6th International Conference on Hybrid Artificial Intelligence Systems (HAIS)

作者： Stanczyk, Urszula Silesian Tech Univ Inst Informat PL-44100 Gliwice Poland

ISBN: (纸本)9783642212215

Computational stylistics focuses on description and quantifiable expression of linguistic styles of written documents that enables author characterisation, comparison, and attribution. It is a case when observation of subtle relationships in data sets is required, with domain knowledge uncertain. Therefore, techniques from the artificial intelligence area, such as Dominance-based Rough Set Approach (DRSA), are well suited to handle the problem. DRSA enables construction of a rule-based classifier consisting of decision rules, selection of which can greatly influence classification accuracy. The paper presents research on application of DRSA classifier in author recognition for literary texts, with considerations on the classifier performance based on all analysis of relative reducts, such subsets of features that maintain classification properties.

关键词： DRSA Classifier Computational Stylistics Reduct decision algorithm Feature Selection

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On an Equivalence Checking Technique for Algebraic Models of Programs

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PROGRAMMING AND COMPUTER SOFTWARE 2011年第6期37卷 292-298页

作者： Podlovchenko, R. I. Moscow MV Lomonosov State Univ Ctr Res Comp Moscow 119992 Russia

In the paper, the equivalence checking problem for program schemas in balanced semigroup models of programs is studied. A method for constructing algorithms to resolve this problem is proposed in the case where a semigroup model of programs possesses the left cancellation property h(1)h(2) = h(1)h(3) double right arrow h(2) = h(3). The equivalence checking problem is shown to be decidable in time that polynomially depends on size of the schema being checked if the balanced semigroup model of programs possesses additionally the right cancellation property h(2)h(1) = h(3)h(1) double right arrow h(2) = h(3) .

关键词： program schema equivalence problem decision algorithm polynomial complexity

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Monitoring of intraoral free flaps with microdialysis

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BRITISH JOURNAL OF ORAL & MAXILLOFACIAL SURGERY 2011年第7期49卷 521-526页

作者： Nielsen, Henrik Toft Gutberg, Nils Birke-Sorensen, Hanne Aarhus Univ Hosp Dept Plast Surg DK-8000 Aarhus Denmark Aarhus Univ Fac Hlth Sci Aarhus Denmark

Because of the confined nature of their position, monitoring intraoral free flaps is a challenge, but it is essential to detect vascular complications in time to ensure the possibility of salvaging the flap. Microdialysis has been the standard technique of choice at the Department of Plastic Surgery, Aarhus University Hospital, since September 1998. In this study we present our experience of monitoring 78 intraoral free flaps. It is a retrospective evaluation of patients' casenotes from November 1998 to March 2008. Sixty-five of the 78 flaps healed without complications. Sixty-one of these showed no sign of ischaemia in the microdialysis values;in 4 cases the microdialysis system caused technical problems. Thirteen patients were reoperated on based on the results of microdialysis analysis, and in all but 2 cases critical ischaemia was found. Ten of the 11 critically ischaemic flaps were saved. The overall loss rate of flaps was 1.3%. The 2 flaps that were reoperated on but no critical ischaemia found were 2 fibular flaps during the time that we were learning how to monitor with microdialysis (1999 and 2000). Since then we have developed a decision algorithm for standard monitoring, and since 2000 we have had no false positive results. We have never lost a flap from neglected ischaemia. Our results show that microdialysis is a safe and reliable technique for postoperative monitoring of intraoral free flaps. (C) 2010 The British Association of Oral and Maxillofacial Surgeons. Published by Elsevier Ltd. All rights reserved.

关键词： Free flaps Intraoral Monitoring Microdialysis decision algorithm

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Learning strategic environments: an experimental study of strategy formation and transfer

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THEORY AND decision 2011年第4期71卷 539-558页

作者： Nicklisch, Andreas Univ Hamburg D-20146 Hamburg Germany Max Planck Inst Res Collect Goods Bonn Germany

I present an experiment on learning about a game in an initially unknown environment. Subjects play repeatedly simple 2 x 2 normal-form coordination games. I compare behavioral learning algorithms for different feedback information. Minimal feedback only informs about own payoffs, while additional feedback informs about own payoffs and the opponent's choice. Results show that minimal feedback information leads to a myopic learning algorithm, while additional feedback induces non-myopic learning and increases the impulse with which players respond to payoff differences. Finally, there is evidence for a strategy transfer across games which differ only according to the relabel of actions, but not according to permutation in the payoff matrix.

关键词： decision algorithm Experimental economics Feedback information Learning about the game

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In 'big bang' major incidents do triage tools accurately predict clinical priority?: A systematic review of the literature

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INJURY-INTERNATIONAL JOURNAL OF THE CARE OF THE INJURED 2011年第5期42卷 460-468页

作者： Kilner, T. M. Brace, S. J. Cooke, M. W. Stallard, N. Bleetman, A. Perkins, G. D. Univ Warwick Clin Trials Unit Warwick Med Sch Coventry CV4 7AL W Midlands England Coventry Univ Fac Hlth & Life Sci Coventry W Midlands England Heart England NHS Fdn Trust Birmingham W Midlands England Univ Warwick Warwick Med Sch Hlth Sci Res Inst Coventry CV4 7AL W Midlands England N W London Hosp NHS Trust London England

Introduction: The term "big bang" major incidents is used to describe sudden, usually traumatic, catastrophic events, involving relatively large numbers of injured individuals, where demands on clinical services rapidly outstrip the available resources. Triage tools support the pre-hospital provider to prioritise which patients to treat and/or transport first based upon clinical need. The aim of this review is to identify existing triage tools and to determine the extent to which their reliability and validity have been assessed. Methods: A systematic review of the literature was conducted to identify and evaluate published data validating the efficacy of the triage tools. Studies using data from trauma patients that report on the derivation, validation and/or reliability of the specific pre-hospital triage tools were eligible for inclusion. Purely descriptive studies, reviews, exercises or reports (without supporting data) were excluded. Results: The search yielded 1982 papers. After initial scrutiny of title and abstract, 181 papers were deemed potentially applicable and from these 11 were identified as relevant to this review (in first figure). There were two level of evidence one studies, three level of evidence two studies and six level of evidence three studies. The two level of evidence one studies were prospective validations of Clinical decision Rules (CDR's) in children in South Africa, all the other studies were retrospective CDR derivation, validation or cohort studies. The quality of the papers was rated as good (n = 3), fair (n = 7), poor (n = 1). Conclusion: There is limited evidence for the validity of existing triage tools in big bang major incidents. Where evidence does exist it focuses on sensitivity and specificity in relation to prediction of trauma death or severity of injury based on data from single or small number patient incidents. The Sacco system is unique in combining survivability modelling with the degree by which the system is overwhe

关键词： Triage Triage tool decision algorithm Clinical prioritisation Major incident Mass casualty Pre-hospital Systematic review

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Additive and multiplicative fault diagnosis for a doubly-fed induction generator

Additive and multiplicative fault diagnosis for a doubly-fed...

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IEEE International Conference on Control Applications (CCA)

作者： Boulkroune, Boulaid Galvez-Carrillo, Manuel Kinnaert, Michel Univ Libre Bruxelles ULB Dept Control Engn & Syst Anal B-1050 Brussels Belgium

ISBN: (纸本)9781457710636

The problem of additive and multiplicative fault detection and isolation (FDI) in the current sensors of a doubly-fed induction generator (DFIG) is considered in the presence of model uncertainty. A residual generator based on the DFIG model is proposed using the structure of the classical generalized observer scheme (GOS). However, each observer in this scheme is replaced by a robust H-/H-infinity fault detection filter followed by a Kalman-like observer. The latter further attenuates the effect of the modelling uncertainties on the residuals. It exploits the specific pattern induced by the balanced three phase nature of all the electric signals. It turns out that the fault detection/isolation problem then amounts to detecting an abrupt change in the mean of the residual vector in the additive fault case, or the appearance of sine waves superimposed to a white noise vector in the multiplicative fault case. A decision algorithm made of a combination of generalized likelihood ratio (GLR) algorithms allows us to detect and isolate the additive and multiplicative sensor faults. The complete FDI system is tested through simulations on a controlled DFIG.

关键词： Additives DFIG FDI Fault detection GLR GOS Hâ?control Kalman filters Kalman-like observer Observers Robustness Rotors Sensors Uncertainty additive fault diagnosis asynchronous generators current sensors decision algorithm doubly fed induction generator electric signals fault detection and isolation fault diagnosis generalized likelihood ratio generalized observer scheme machine control multiplicative fault diagnosis noise vector observers robust H-/Hâ?fault detection filter robust control sensors sine waves

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Animal Testing 1

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22nd International Symposium on algorithms and Computation (ISAAC 2011)

作者： Dumitrescu, Adrian Hilscher, Evan Univ Wisconsin Milwaukee Milwaukee WI 53201 USA

ISBN: (数字)9783642255915

ISBN: (纸本)9783642255908

A configuration of unit cubes in three dimensions with integer coordinates is called an animal if the boundary of their union is homeomorphic to a sphere. Shermer discovered several animals from which no single cube may be removed such that the resulting configurations are also animals [14]. Here we obtain a dual result: we give an example of an animal to which no cube may be added within its minimal bounding box such that the resulting configuration is also an animal. We also present two O(n)-time algorithms for determining whether a given configuration of n unit cubes is an animal.

关键词： Animal – homeomorphic to a sphere – Davenport Schinzel sequence – Euler Poincar茅 formula – Steinitz’ theorem – decision algorithm

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Connectivity Control Methods and decision algorithms Using Neural Network in Decentralized Networks 1

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7th International Symposium on Neural Networks

作者： Li, Demiin Zhou, Jie Wang, Jiacun Chen, Chunjie Donghua Univ Coll Informat Sci & Technol Shanghai 201620 Peoples R China Donghua Univ Sch Sci Shanghai 201620 Peoples R China Monmouth Univ Dept Comp Sci West Long Branch NJ 07762 USA

ISBN: (数字)9783642132780

ISBN: (纸本)9783642132773

Consider mobile agents' power limitation and mobility resulting in communication delay, network connectivity may be not maintained only by power control or mobility control in mobile decentralized network, so we provide integrated power and mobility control law design methods for preserved connectivity in this paper. Those integrated connectivity control methods are achieved by constructing decentralized navigation functions respective to relative position constrain conditions. We extend previous works of power control and mobility control for connectivity, and design power control methods, integrated power and mobility control methods for position or velocity. Furthermore, considering power control may have the same effect with mobility control on connected distance control, we present some decision algorithms for decentralized networks connectivity using neural networks. Numerical simulations are discussed in the end. The results could be applied to location management, data consensus and decision making in decentralized networks.

关键词： preserved connectivity integrated control time delay navigation functions decision algorithm

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Performance evaluation of dynamic spectrum sharing for two wireless communication networks

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IET COMMUNICATIONS 2010年第4期4卷 452-462页

作者： Chung, Y. -L. Tsai, Z. Natl Taiwan Univ Grad Inst Commun Engn Taipei 10764 Taiwan

Dynamic spectrum sharing has become an important approach to improve spectrum efficiency by exploiting traffic loads variations of multiple wireless networks when a radio band is shared. In this study, the authors present an effective centralised decision approach to deal with the problem regarding how a spectrum manager should periodically re-allocate the spectrum between two networks in a single cell, while maintaining both the call blocking and dropping probabilities in their acceptable levels, and improving the spectrum efficiency simultaneously. In the decision algorithm, a two-level model (a spectrum level model and a call level model) is used to characterise the dynamic spectrum sharing mechanism and network resource usage within the two networks. Performance analysis begins with an approximated Markov Chain analysis and an iterative approach. The authors then further validate the approximated numerical results with simulations. These numerical results demonstrate that the call blocking and dropping probabilities of each network employing dynamic spectrum sharing are much better maintained than those using a fixed allocation under heavy traffic load. The authors thus conclude that the dynamic spectrum sharing algorithm can maintain the quality of service (QoS) of each network while the effective spectrum utilisation is improved under a fluctuation traffic environment when the available spectrum is limited.

关键词： traffic loads variations dropping probabilities Legislation, frequency allocation and spectrum pollution quality of service decision algorithm Markov chain analysis iterative approach dynamic spectrum sharing mechanism channel allocation iterative methods centralised decision approach spectrum manager spectrum efficiency call blocking two-level model wireless communication networks Interpolation and function approximation (numerical analysis) Radio links and equipment radio spectrum management radio networks network resource usage Markov processes

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Uniform Quantizer for Cooperative Sensing in Cognitive Radio Networks

Uniform Quantizer for Cooperative Sensing in Cognitive Radio...

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21st Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

作者： Yilmaz, H. Birkan Tugcu, Tuna Alagoz, Fatih Bogazici Univ Dept Comp Engn Istanbul Turkey

ISBN: (纸本)9781424480166

Cooperative spectrum sensing for dynamic spectrum access to unused licensed spectrum has been proposed as a solution to the spectrum scarcity problem. In this paper, a novel sensing algorithm, Cooperative Sensing with decision Vector (CSDV), that employs uniform quantizer and a weight vector for global decision logic, is proposed. CSDV method is based on energy detection and performs better than conventional hard decision algorithms such as MAJORITY and M/N in terms of probability of detection and false alarm at the cost of a marginal increase in overhead bits. Probability of detection is maximized for a given probability of false alarm by proposed method via convex optimization. For detailed analysis, CSDV is compared with equal gain combiner scheme, which performs far better than hard decision algorithms, via highest bandwidth requirement. Moreover, robustness of CSDV method to sensing error is analyzed when some nodes always report false decisions to the fusion center.

关键词： CSDV method cognitive radio cognitive radio network cooperative communication cooperative spectrum sensing decision algorithm decision logic decision vector detection probability dynamic spectrum access energy detection gain combiner scheme licensed spectrum optimisation probability radio spectrum management spectrum scarcity problem uniform quantizer

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