this article describes our approach of building Reusable Information Objects, based on presently used data in different Information systems in the University of Technology, Jamaica. Based on Object-Oriented ideas, we ...
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ISBN:
(纸本)9780889866997
this article describes our approach of building Reusable Information Objects, based on presently used data in different Information systems in the University of Technology, Jamaica. Based on Object-Oriented ideas, we are able to create and maintain these objects as an Information Basis for any other systemsthat can be developed. Instantiations of these objects allow generating new Information systemsthat don't modify this Basis, which is critical for other systems. Flexibility and customization of new Information systems which use the basic data are the main benefits of that approach.
Recent years, coverage has been widely investigated as one of the fundamental quality measurements of wireless sensor networks. In order to maintaining the coverage while saving energy of networks, algorithms have bee...
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ISBN:
(纸本)9781605582351
Recent years, coverage has been widely investigated as one of the fundamental quality measurements of wireless sensor networks. In order to maintaining the coverage while saving energy of networks, algorithms have been developed to keep a minimum cover set of sensors working and turn off the redundant;sensors. Generally, centralized algorithms can give a better result than distributed algorithms in terms of the number of active sensors. However, the heavy computation requirements and message overhead for collecting geographical location data keep centralized algorithms out of most distributed scenarios. In this article, Based on the idea of coverage compensation a distributed node partition algorithm for random deployments is presented to generate a minimum cover set by using the optimal node distributions created by the centralized algorithms such as GA. A Genetic Algorithm for coverage is proposed too to demonstrate how an optimal coverage node distribution created by CA can be used in a distributed scenario. Ours works are simulated on JGAP and NS2. the simulation result shows that our partition algorithm based on coverage compensation can achieve the same performance as OCOPS in terms of coverage and number of active sensors while using less control messages.
Reliability in computer or engineering systems is undoubtedly a key requirement in the development process. Safety within critical control systems, and reliable data transfers, require tolerance to unexpected and unwa...
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ISBN:
(纸本)9780889867307
Reliability in computer or engineering systems is undoubtedly a key requirement in the development process. Safety within critical control systems, and reliable data transfers, require tolerance to unexpected and unwanted phenomena. In biology, new cells can replace damaged cells [1], DNA is able to repair and replicate with error control [1]. these processes are essential to maintain the overall organism. Biology has often been a successful inspiration in computation (artificial neural networks, genetic algorithms, ant colony optimisation, etc) although conventional computation differs widely from natural computation. In this respect, [2] introduced systemic computation (SC), a model of interacting systems with natural characteristics and suggested a new computer architecture. Following this work, [3] introduced a systemic computer as a virtual machine running on conventional computers. In this paper we show, using a genetic algorithm implementation running on this platform, how crash-proof programs following the SC paradigm have native fault-tolerance and easily integrated self-maintenance.
this paper describes a methodology for embedding dynamic behaviour into software components. the implications and system architecture requirements to support this adaptivity are discussed. this work is part of a Europ...
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ISBN:
(纸本)9783540692942
this paper describes a methodology for embedding dynamic behaviour into software components. the implications and system architecture requirements to support this adaptivity are discussed. this work is part of a European Commission funded and industry supported project to produce a reconfigurable middleware for use in automotive systems. Such systems must be trustable against illegal internal behaviour and activity with external origins, additional devices for example. Policy-based computing is used here as an example of embedded logic. A key contribution of this work is the way in which static and dynamic aspects of the system are interfaced, such that the behaviour can be changed very flexibly (even during run-time), without modification, recompilation or redeployment of the embedded application code. An implementation of these concepts is presented, focussing on achieving trust in the use of dynamic behaviour.
the third order optical aberrations models for LSI/LSV (Linear Space Invariant/Variant) systems is described in this paper. these models are based on Seidel and Zernike approximating polynomials. Optical aberrations e...
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ISBN:
(纸本)9780819473790
the third order optical aberrations models for LSI/LSV (Linear Space Invariant/Variant) systems is described in this paper. these models are based on Seidel and Zernike approximating polynomials. Optical aberrations effect to the PSF (Point Sread Function) of optical imaging systems is described as well. Higher quality and precision of image data can be obtained with deconvolution of the acquired images and system point spread function. the PSF can be modelled as a space variant function from the estimation of optical system wavefront aberrations.
the standard serial signal search method does not satisfy modern requirement on acquisition time and sensitivity especially in the case of high sensitivity GNSS receivers. the high performance, high sensitivity acquis...
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ISBN:
(纸本)9785900780801
the standard serial signal search method does not satisfy modern requirement on acquisition time and sensitivity especially in the case of high sensitivity GNSS receivers. the high performance, high sensitivity acquisition methods are based on one or two-dimensional parallel search algorithms, which are capable to calculate cross correlation function of the received signal and its replica for the whole search space eventually for its significant part in a single step. the characteristics of parallel search acquisition algorithms for the GLONASS signal are discussed in this paper for both coherent and non coherent processing. the parallel search algorithms feature by fixed processing time, therefore the performance of these algorithms can be characterized by the probabilities of correct recognition of the search space cell with correlation maximum for different signal to noise ratios.
Internet is a ubiquitous part of businesses and individuals worldwide. With its popularity on an incline, operating system vendors are developing end-systemsthat support the new version of Internet Protocol (IPv6) th...
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Making multigrid algorithms run efficiently on large parallel computers is a challenge. Without clever data structures the communication overhead will lead to an unacceptable performance drop when using thousands of p...
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Corpus-based approaches and statistical approaches have been the main stream of natural language processing research for the past two decades. Language resources play a key role in such approaches, but there is an ins...
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ISBN:
(纸本)2951740840
Corpus-based approaches and statistical approaches have been the main stream of natural language processing research for the past two decades. Language resources play a key role in such approaches, but there is an insufficient amount of language resources in many Asian languages. In this situation, standardisation of language resources would be of great help in developing resources in new languages. this paper presents the latest development efforts of our project which aims at creating a common standard for Asian language resources that is compatible with an international standard. In particular, the paper focuses on i) lexical specification and data categories relevant for building multilingual lexical resources for Asian languages;ii) a core upper-layer ontology needed for ensuring multilingual interoperability and iii) the evaluation platform used to test the entire architectural framework.
Main purpose of engineering is transfer of intent from different humans into product definition. Application of an integrated product model has a chance of establishment of highly efficient processes for product defin...
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