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检索条件"机构=Software Systems Engineering Advanced Software and Technology"

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Programming the mobility behaviour of agents by composing itineraries 5th

Programming the mobility behaviour of agents by composing it...

引用

5th Asian Computing Science Conference on Advances in Computing Science, ASIAN 1999

作者： Loke, Seng Wai Schmidt, Heinz Zaslavsky, Arkady CRC for Enterprise Distributed Systems Technology Monash University CaulfieldVIC3145 Australia School of Computer Science and Software Engineering Monash University CaulfieldVIC3145 Australia

ISBN: (纸本)354066856X

We present an algebra for programming the itineraries of mobile agents. The algebra contains operators for modelling sequential, parallel, nondeterministic, and conditional mobility behaviour. Iterative behaviour is also modelled by a language of regular itineraries borrowing ideas from regular expressions. We give an operational semantics for the operators using Plotkin-style transition rules and provide examples of itineraries for meeting scheduling, sales order processing, and network modelling. © Springer-Verlag Berlin Heidelberg 1999.

关键词： Algebra

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PORT: Peirce online resource testbeds 7th

引用

7th International Conference on Conceptual Structures, ICCS 1999

作者： Keeler, Mary Tepfenhart, William Center for Advanced Research and Technology in the Arts and Humanities University of Washington SeattleWA98117 United States Monmouth University Software Engineering Dept. West Long Branch NJ United States

This overview of PORT covers the goals to achieve, the institutions involved, and the status of the project. Proposals for funding PORT development are pending, but this preliminary report provides URLs to sites where... 详细信息

ISBN: (纸本)3540662235

关键词： Artificial intelligence

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Content based video compression for high perceptual quality videoconferencing using wavelet transform 3

Content based video compression for high perceptual quality ...

引用

3rd International Conference on Computational Intelligence and Multimedia Applications, ICCIMA 1999

作者： Karlelar, Jayashree Desai, U.B. Hughes Software Systems Ltd. Electronic City Plot 31 Sector 18 Gurgaon122 015 India Dept. of Electrical Engineering Indian Institute of Technology Powai Mumbai400 076 India

ISBN: (纸本)0769503004

A novel hybrid compression scheme for videoconferencing and videotelephony applications at very low bit rates (i.e., 32 Kbits/s) is presented. The human face is the most important region within a frame and should be coded with high fidelity. To preserve perceptually important information at low bit rates, such as face regions, skin-tone is used to detect and adaptively quantize these regions. Novel features of this coder are the use of overlapping block motion compensation in combination with discrete wavelet transform, followed by zerotree entropy coding with new scanning procedure of wavelet blocks such that the rest of the H.263 framework can be used. At the same total bit-rate, coarser quantization of the background enables the face region to be quantized finely and coded with higher quality. © 1999 IEEE.

关键词： Discrete wavelet transforms

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Deploying systems visualisation environments: an agent-based approach

Deploying systems visualisation environments: an agent-based...

引用

International Conference on Knowledge-Based Intelligent Information engineering systems (KES)

作者： D.P.J. Goodburn R.J. Vernik Software Systems Engineering Group Information Technology Division Defence Science and Technology Organisation Salisbury SA Australia

This paper reports an approach to the deployment of systems visualisation environments through the use of software agents. It provides a discussion of the issues that should be addressed in the deployment of integrated computer-based visualisation tool sets which, combined with appropriate support, provide the basis for systems' visualisation solutions. It outlines an approach that addresses these deployment issues through the application of a component-based software engineering methodology that makes use of software agents. In this approach, called the integrated visualisation and description (IV&D) approach, software agents are considered to be knowledge-based software components that encapsulate specific knowledge of the application domain and are used to deploy a systems visualisation environment into this domain. The paper begins with a discussion of the issues relating to the deployment of systems visualisation environments. These are related to a conceptual model of the description process which forms a basis for the IV&D approach. We then discuss the software agents, called IV&D agents, that are used to support the deployment of systems visualisation environments. Finally, we discuss domain characterisation, which provides the knowledge used by IV&D agents to deploy the systems visualisation environments.

关键词： Visualization software agents software systems Application software Australia systems engineering and theory Information technology Computer network management Financial management engineering management

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Content based video compression for high perceptual quality videoconferencing using wavelet transform

Content based video compression for high perceptual quality ...

引用

International Conference on Computational Intelligence and Multimedia Applications

作者： J. Karlelar U.B. Desai Hughes Software Systems Limited Gurgaon India Department of Electrical Engineering Indian Institute of Technology Mumbai India

关键词： Video compression Teleconferencing

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A COMPUTATIONAL ACOUSTIC FIELD RECONSTRUCTION PROCESS BASED ON AN INDIRECT VARIATIONAL BOUNDARY ELEMENT FORMULATION

A COMPUTATIONAL ACOUSTIC FIELD RECONSTRUCTION PROCESS BASED ...

引用

ASME 1999 International Mechanical engineering Congress and Exposition, IMECE 1999

作者： Zhang, Zhidong Vlahopoulos, Nickolas Raveendra, S.T. Allen, T. Zhang, K.Y. Dept. of Naval Architecture and Marine Engineering The University of Michigan United States Software Development and Support Automated Analysis Corporation Scientific Research Laboratories Ford Motor Company Truck VC CAE Department Advanced Vehicle Technology Ford Motor Company

ISBN: (纸本)9780791816370

The objective of the work presented in this paper is to develop a computational capability based on the indirect variational boundary element method (IVBEM) to evaluate appropriate velocity boundary conditions on an assembly of piston type sources such that they can recreate a prescribed acoustic field. Information for the acoustic pressure of the original acoustic field at certain field points constitutes the input to the developed process. Several new developments associated with the IVBEM are completed within the field reconstruction process. A new formulation for treating irregular frequencies in the IVBEM is developed and implemented in the field reconstruction process. The velocities on the piston type sources are computed from transfer functions between the field points, where the acoustic pressure of the original field is prescribed, and the velocity boundary condition on each element of the generic source. The IVBEM is employed for computing the transfer functions. A singular value decomposition solver is integrated with the IVBEM computations in order to evaluate the velocity boundary conditions from the transfer functions. Finally, an algorithm is developed that identifies the optimum field points where the acoustic pressure of the original field must be prescribed. The optimum field points are selected from a set of prescribed candidate points. The selection of the optimum points is based on the geometric characteristics of the generic source, the frequency of analysis, and the properties of the medium. Several validation and application cases are presented. © 1999 American Society of Mechanical Engineers (ASME). All rights reserved.

关键词： Transfer functions

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Content based very low bit rate video coding using wavelet transform

Content based very low bit rate video coding using wavelet t...

引用

IEEE International Conference on Image Processing

作者： J. Karlekar U.B. Desai Electronic City Hughes Software Systems Limited Gurgaon India Department of Electrical Engineering Indian Institute of Technology Mumbai India

In this paper we present a new hybrid compression scheme for videoconferencing and videotelephony applications at very low bit rates (i.e., 32 kbits/s). In these applications, human face is the most important region within a frame and should be coded with high fidelity. To preserve perceptually important information at low bit rates, such as face regions, skin-tone is used to detect and adaptively quantize these regions. Novel features of this coder are the use of overlapping block motion compensation in combination with discrete wavelet transform, followed by zerotree entropy coding with new scanning procedure of wavelet blocks such that the rest of the H.263 framework can be used. At the same total bit-rate, coarser quantization of the background enables the face region to be quantized finely and coded with higher quality. The simulation results demonstrates comparable objective and superior subjective performance when compared with H.263 video coding standard, while providing the advanced feature like scalability functionalities.

关键词： Bit rate Video coding Face detection Discrete wavelet transforms Teleconferencing Humans Motion compensation Entropy coding Quantization Scalability

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An operational component specification method

An operational component specification method

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Asia-Pacific Conference on software engineering

作者： Hyung Ho Eim Dong Ewan Kim Hyo Taeg Jung Yun Dae Chung Doo Hwan Bae Software Eng. Lab. Korea Adv. Inst. of Sci. & Technol. Seoul South Korea Software Engineering Laboratory Korea Advanced Institute of Science and Technology Taejon South Korea

We propose an operational component specification method that provides execution models for analyzing behaviors as well as adopting checking rules for consistency. Our proposed operational component specification method will help the users to capture the meaning of components in a precise and abstract manner. Our method is mainly based on two ideas, object-orientation and the action system. Object-orientation makes specifications easy to understand and the action system leads to a simple and clear view of behaviors. Our method utilizes the Petri net formalism, especially the notion of tokens, in order to handle dynamic configuration in each component. We develop an extended version of Petri nets, called Object Petri Nets, to build execution models and extend analysis techniques of Petri nets.

关键词： Object oriented modeling Petri nets Laboratories software quality software engineering Telecommunication computing Independent component analysis Buildings Java Message passing

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Wireless multicasting: design and performance analysis

Wireless multicasting: design and performance analysis

引用

IEEE International Conference on Personal Wireless Communication

作者： A. Mishra C.P. Ravikumar Electtonic City Hughes Software Systems Limited Gurgaon Haryana India Department of Electrical Engineering Indian Institute of Technology New Delhi India

Advances in the area of image and voice compression have given way to transmission rates of a few kilobits/second for acceptable quality audio and video. Audio/video conferencing among multiple parties in cellular networks is therefore a distinct possibility. We present an algorithm for designing a mobile cellular network that can support multicasting applications. The mobile network may consist of one or more tiers, which correspond to different user velocities. Communication channels are partitioned across tiers. The objective of network design is to minimize call loss probability by selecting an appropriate frequency reuse pattern and suitably partitioning network resources across tiers. Earlier work in this area has only concentrated on point-to-point communications. We permit multicast communications that may involve users from more than one tier. We describe a cost optimization algorithm for designing cellular networks that can support multicast traffic. We also describe a performance analysis of the designed network through analytical and simulation techniques.

关键词： Performance analysis Land mobile radio cellular systems Videoconference Video compression Multicast algorithms Partitioning algorithms Algorithm design and analysis Image coding Communication channels Frequency

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Adaptive real-time control of a Christmas tree using a novel signal processing approach

Adaptive real-time control of a Christmas tree using a novel...

引用

American Control Conference (ACC)

作者： J. Hu H.R. Wu C.T. Chou M. Verhaegen D. Westwick G. Nijsse School of Computer Science and Software Engineering Clayton Australia Control Laboratory Faculty of Information Technology and Systems Delft University of Technnology Delft Netherlands

The LMS algorithm forms the core of a number of adaptive control schemes. It has on one hand provided certain degree of robustness to these algorithms but on the other hand its convergence rate is notoriously slow. We propose a method to initialize the LMS algorithm which dramatically shortens its adaptation period. We also prove that under certain condition this initialization can be computed without explicit knowledge of either the reference or noise spectrum. Although the work is illustrated using the filtered-X scheme, this idea can also be applied to other similar schemes. Two successful experiments starting from black-box identification to real-time control have verified the effectiveness of this idea.

关键词： Programmable control Adaptive control Adaptive signal processing Least squares approximation Signal processing algorithms Control systems Testing Active noise reduction Noise cancellation Optimal control

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