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9th European Signal Processing Conference, EUSIPCO 1998

作者： Rieder, Markus Guir, Nicolas Dillmann, R. Department for Computer Science Institute for Real-Time Computer Control Systems and Robotics University of Karlsruhe Karlsruhe76128 Germany Department of Computer Architecture University of Malaga Malaga Spain

A curvature based technique for fast range image registration is described in this work. With this technique the rotation and the displacement of a surface with respect to another one is calculated. The proposed algorithm uses Gaussian curvature information from each image point to extract a number of feature points. Two bounds are applied to the curvature values. Points with these bound curvature value are classified into two classes of feature points. In order to calculate the rotation angle between the two range images, the feature points are paired. That means the angle and the distance of the point pairs have to be transformed into a general view coordinate system. In the orientation matching procedure, we compare each pairing in the first image with each possible in the second one. This process is independent of the translation calculation which is calculated in a sequencing step. This pipelining principle speeds up the registration process if correspondences are calculated constantly.

关键词： Image registration

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Scaling law for coherent vortices in decaying drift Rossby wave turbulence

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Physical Review E 1998年第2期57卷 1636-1636页

作者： Takeshi Watanabe Takahiro Iwayama Hirokazu Fujisaka Department of Physics Kyushu University 33 Fukuoka 812-81 Japan Department of Control Engineering and Science Faculty of Computer Science and Systems Engineering Kyushu Institute of Technology Iizuka 820 Japan

We numerically study the time evolution of coherent vortices in decaying turbulence described by the Charney-Hasegawa-Mima equation with the weak dissipation. Self-organized coherent vortices develop through the mutual advection and the vortex merging. The dimensional analysis provides the dynamical scaling law of structure function of the potential vorticity field S(k,t)=E5/4λ1/2t1/2G(k/k¯(t)) [k¯(t)∼E−1/8λ3/4t−1/4] with a scaling function G(x), which turns out to be in good agreement with numerical experiments. In physical space, quantities related to coherent vortices develop algebraically with time. The dimensional analysis predicts that the total number N of vortices decreases as N∼t−χ with exponent χ=1/2. Moreover, it is found that the remarkable feature of this system is the approximate conservation of the area of the coherent region in the potential vorticity field.

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A least-squares interpretation of the single-stage maximization criterion for multichannel blind deconvolution

A least-squares interpretation of the single-stage maximizat...

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International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： S. Ohno Y. Inouye Department of Mathematics and Computer Science Shimane University Shimane Japan Department of Electronic and Control Systems Engineering Shimane University Shimane Japan

In order to attain multichannel blind deconvolution of linear time-invariant nonminimum-phase dynamic systems. Inouye and Habe (see Proc. IEEE Signal Processing Workshop on Higher-Order Statistics, p.96-100, 1995) proposed 1995 a single-stage maximization criterion. The criterion function is the sum of squared fourth-order cumulants of the equalizer outputs, and the coefficients of the equalizer are determined at once. On the other hand, one of possible approaches for multichannel blind deconvolution is to construct an equalizer based on the system identified by higher-order cumulant-matching. In this paper, it is shown that the single-stage maximization criterion is equivalent to a least-squares fourth-order cumulant-matching criterion after multichannel pre-whitening of channel outputs. This result provides us with an important interpretation of the single-stage maximization criterion.

关键词： Equalizers Deconvolution Vectors Signal processing Filters Transfer functions Wideband Speech enhancement Speech processing Image enhancement

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Specialized neural network and fuzzy logic algorithm in comparison for word frequency prediction in document filtering

Specialized neural network and fuzzy logic algorithm in comp...

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1998 IEEE International Conference on Fuzzy systems, FUZZY 1998

作者： Baranyi, Péter Aradi, Petra Kóczy, László T. Gedeon, Tamás D. Dept. of Automation T. U. of Budapest Hungary Department of Systems and Control Engineering T.U. of Budapest Hungary Dept. of Telecommunication and Telematics T. U. of Budapest Hungary School of Computer Science and Eng. U. of New South Wales Australia

ISBN: (纸本)078034863X

For very large document collections or high volume streams of documents, finding relevant documents is a major information filtering problem. A major aid to information retrieval systems produces a word frequency measure estimated from some important parts of the document using neural network approaches. In this paper a fuzzy logic technique and as its simplified case a neural network algorithm will be proposed for this task. The comparison of these two and an alternative neural network algorithm will also be discussed. © 1998 IEEE.

关键词： Information retrieval systems

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Functional hazard analysis for highly integrated aerospace systems

Functional hazard analysis for highly integrated aerospace s...

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IEE Certification of Ground/Air systems Seminar (Ref. No. 1998/255)

作者： P.J. Wilkinson T.P. Kelly Performance and Control Systems Department Rolls-Royce Commercial Aero Engines Limited Derby UK Rolls-Royce Systems and Software Engineering Department of Computer Science University Technology Centre University of York York UK

Functional Hazard Assessment (FHA) is being increasingly recommended (e.g. by the Aerospace Recommended Practice-ARP 4754 [SAE94]) as a means of performing hazard identification. However, many of the available example applications of this approach (including that given in ARP 4761 [SAE95]) are illustrated either for aircraft-level functions or sub-system functions with obvious and visible functional effects. Our experience is that it can be difficult to apply FHA for lower level aircraft systems (specifically at the level of the engine controller) where, due to the level of complexity and integration with other systems, the overall effects of functional failure are far from obvious. In this paper, we describe the problems we have encountered when applying FHA and the (partial) solutions we have proposed in order to overcome these problems.

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The behavioural pole structure of nD systems

The behavioural pole structure of nD systems

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IEEE Conference on Decision and control

作者： J. Wood E. Rogers D.H. Owens ISIS Group Department Elect. and Computer Science University of Southampton Southampton UK Centre for Systems and Control Engineering School of Engineering University of Exeter UK

We discuss the pole structure of nD linear systems from a behavioural point of view. We define the notions of irreducible, reducible, manifest and latent poles, which correspond in the classical 1D setting to controllable poles, input decoupling zeros, observable poles and output decoupling zeros. Our definition of poles can be interpreted in terms of kernel representations, and also allows an integral representation of any zero-input trajectory in terms of system poles.

关键词： Neodymium Poles and zeros Linear systems Kernel Frequency Polynomials Intersymbol interference Multidimensional systems control systems Filtering theory

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Specialized neural network and fuzzy logic algorithm in comparison for word frequency prediction in document filtering

Specialized neural network and fuzzy logic algorithm in comp...

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IEEE International Conference on Fuzzy systems (FUZZ-IEEE)

作者： P. Baranyi P. Aradi L.T. Koczy T.D. Gedeon Department of Automation TU Budapest Hungary Department of Systems and Control Engineering TU Budapest Hungary Department of Telecommunication and Telematics TU Budapest Hungary School of Computer Science and Engineering University of New South Wales Australia

关键词： Intelligent networks Neural networks Fuzzy logic Frequency estimation Frequency measurement Information retrieval Information filtering Information filters Machine assisted indexing Filtering algorithms

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Royal Academy of Medicine in Ireland - Section of Bioengineering - Proceedings of meeting held in Dundalk, Co. Louth, in February 1998.

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IRISH JOURNAL OF MEDICAL science 1998年第4期167卷 256-276页

作者： [Anonymous] Orthopaedic Research Unit The Queen’s University of Belfast School of Biomedical Sciences The Queen’s University of Belfast Howmedica International Ltd. Raheen Industrial Estate Limerick Department of Mechanical Engineering Trinity College Dublin 2 Mater Hospital Dublin 7 Orthopaedic Research Laboratory Århus University Hospital Denmark University of Limerick Limerick Limerick Regional Hospital Raheen Limerick Boston Scientific Ireland Ltd. Galway Department of Mechanical Engineering University College Dublin Dublin Department of Electrical and Electronic Engineering University College Dublin Dublin Bioengineering Research Centre Department of Mechanical Engineering University College Dublin Dublin Northern Ireland Bio-Engineering Centre (NIBEC) School of Electrical and Mechanical Engineering University of Ulster Newtownabbey Department of Mechanical & Manufacturing Engineering The Ashby Building The Queen’s University of Belfast Johnson and Johnson Professional Orthopaedic Division Queensway England Department of Cardiology and Department of Medical Physics & Bioengineering St. James’s Hospital Dublin 8 Burke House Ellison Street Castlebar Royal College of Surgeons in Ireland Department of Surgery Beaumont Hospital Dublin Department of Electronic and Electrical Engineering Trinity College Dublin 2 Department of Aeronautical Engineering The Queen’s University of Belfast Vascular Unit Belfast City Hospital Department of Medical Physics and Bioengineering St. James’s Hospital Dublin 8 Centre for Biomedical Electronics Department of Electronic and Computer Engineering University of Limerick Limerick Department of Mechanical and Aeronautical Engineering University of Limerick Limerick School of Health Sciences University of Ulster Ireland School of Physiotherapy University of Ulster Newtownabbey Clinical Engineering NI Medical Physics Agency Belfast and Radiology Royal Victoria Hospital Musgrave Park Hospital University of Limerick Biomedical Institute (ULBMI) Uni

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Human-centred intelligent systems and soft computing

British Telecom technology journal

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British Telecom technology journal 1998年第3期16卷 125-133页

作者： Azvine, B. Wobcke, W. Manchester University United Kingdom Dynamics and Control Research Group Engineering Department Manchester University United Kingdom Contr. and Instrum. Research Group Staffordshire University United Kingdom Intelligent Systems Research Group BT Laboratories United Kingdom Dept. of Engineering Mathematics Bristol University United Kingdom Europ. Netwk. Excellence U. University of Queensland Australia University of Essex United Kingdom Basser Dept. of Computer Science University of Sydney Australia

This paper considers the abstract features of human/machine interaction systems that are required for the production of intelligent behaviour. A conceptual architecture is proposed for a subset of intelligent systems called human-centred intelligent systems (HCISs) and it is argued that such systems must be autonomous, robust and adaptive in order to be intelligent. Soft computing is proposed as a promising new technique that can be used to build HCISs, and examples are presented where this is already being done. Finally, flexibility is defined to be a combination of the often-conflicting requirements of robustness and adaptability, and it is argued that the right balance between these two features is necessary to achieve intelligent behaviour.

关键词： Learning systems

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Intelligent multi-modal systems

British Telecom technology journal

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British Telecom technology journal 1998年第3期16卷 134-144页

作者： Tsui, K.C. Azvine, B. Djian, D. Voudouris, C. Xu, L.Q. Hong Kong Polytechnic University Hong Kong University of Essex King's College London United Kingdom BT Laboratories United Kingdom ATM Traffic Management United Kingdom Manchester University United Kingdom Dynamics and Control Research Group Engineering Department Manchester University United Kingdom Contr. and Instrum. Research Group Staffordshire University United Kingdom Intelligent Systems Research Unit BT Laboratories United Kingdom Dept. of Engineering Mathematics Bristol University United Kingdom Europ. Netwk. Excellence U. Institut d'Informatique d'Entreprise France Oxford University Robotics Research Group United Kingdom University of Nice France Ecole des Mines de Paris France Natl. Technical University of Athens Greece University of Essex United Kingdom Department of Computer Science University of Essex United Kingdom Intelligent Systems Research Group BT Laboratories United Kingdom Southeast University Nanjing China Institute of Acoustics Chinese Academy of Sciences Beijing China University of East Anglia United Kingdom University of Sussex King's College London United Kingdom University of Abertay Dundee United Kingdom

Research in human/computer interaction has mainly focused on natural language, text, speech and vision primarily in isolation. Recently there have been a number of research projects that have concentrated on the integration of such modalities using intelligent reasoners. The rationale is that many inherent ambiguities in single modes of communication can be resolved if extra information is available. This paper describes an intelligent multi-modal system called the Smart Work Manager. The main characteristics of the Smart Work Manager are that it can process speech, text, face images, gaze information and simulated gestures rising the mouse as input modalities, and its output is in the form of speech, text or graphics. The main components of the system are the reasoner, a speech system, a vision system, an integration platform and the application interface. The overall architecture of the system will be described together with the integration platform and the components of the system which include a non-intrusive neural network based gaze-tracking system. The paper concludes with a discussion on the applicability of such systems to intelligent human/computer interaction and lessons learnt in terms of reliability and efficiency.

关键词： Learning systems

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