We present an investigation of epsilon -entropy, h(epsilon), in dynamical systems, stochastic processes and turbulence, This tool allows for a suitable characterization of dynamical behaviours arising in systems with ...
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We present an investigation of epsilon -entropy, h(epsilon), in dynamical systems, stochastic processes and turbulence, This tool allows for a suitable characterization of dynamical behaviours arising in systems with many different scales of motion. Particular emphasis is put on a recently proposed approach to the calculation of the epsilon -entropy based on the exit-time statistics. The advantages of this method are demonstrated in examples of deterministic diffusive maps, intermittent maps, stochastic self- and multi-affine signals and experimental turbulent data. Concerning turbulence, the multifractal formalism applied to the exit-time statistics allows us to predict that h(epsilon) similar to epsilon (-3) for velocity-time measurement. This power law is independent of the presence of intermittency and has been confirmed by the experimental data analysis. Moreover, we show that the epsilon -entropy density of a three-dimensional velocity field is affected by the correlations induced by the sweeping of large scales. (C) 2000 Elsevier Science B.V. All rights reserved.
Linear Predictive coding is applied for transmitting the samples in a binary system consisting of (+1, -1). This binary system provides a unified method of encoding signed quantities. All the pole filters used in the ...
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Linear Predictive coding is applied for transmitting the samples in a binary system consisting of (+1, -1). This binary system provides a unified method of encoding signed quantities. All the pole filters used in the LPC have been achieved with different algorithms. LPC in this system is found to be suitable for encoding signed numbers in unified way.
This paper proposes a new bus-invert coding scheme for reducing the number of bus transitions. Unlike the previous schemes in which the entire bus lines or one subset of the bus lines are considered for bus-invert cod...
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This paper proposes a new bus-invert coding scheme for reducing the number of bus transitions. Unlike the previous schemes in which the entire bus lines or one subset of the bus lines are considered for bus-invert coding, in the proposed scheme, the bus lines are partitioned and each partitioned group is considered independently for bus-invert coding to maximize the effectiveness of reducing the total number of bus transitions. Experimental results show that the decomposed bus-invert coding scheme reduces the total number of bus transitions by 47.2% and 11.9% on average than those of the conventional and the partial bus-invert coding schemes respectively.
This paper presents the results of Surrey Space Centre's experience in using different coding schemes and hardware configurations to protect data and software stored in COTS-device based memories on-board operatio...
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This paper presents the results of Surrey Space Centre's experience in using different coding schemes and hardware configurations to protect data and software stored in COTS-device based memories on-board operational spacecraft in low Earth orbit.
The total information content of a composite system consisting of k qubits can either be completely encoded in a specific computational basis, or alternatively it can be partially encoded in a number of different base...
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The total information content of a composite system consisting of k qubits can either be completely encoded in a specific computational basis, or alternatively it can be partially encoded in a number of different bases. In that case the information encoded in a complete set of mutually complementary bases is again k bits. Using only two single-qubit gates and the controlled-NOT gate, one can implement coding and decoding in such a complete set. The total information content is then invariant under the particular choice of a complete set of mutually complementary bases. For maximally entangled states the k bits of information are not encoded into the k qubits separately but only into their joint properties.
The search for space-filling designs is furthered by bringing to the task the ideas of coding theory. Determination of optimal parameter values for general binary maximin distance designs is described in detail. All c...
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The search for space-filling designs is furthered by bringing to the task the ideas of coding theory. Determination of optimal parameter values for general binary maximin distance designs is described in detail. All cases for which this determination has been made are presented. Designs for all such cases are given in a catalog of space-filling designs. Designs are provided for up to 27 independent factors. Also, the statistical concepts of maximum resolution and minimum aberration are shown to be related to the duals of linear maximin distance designs. (C) 2000 Elsevier Science B.V. All rights reserved. MSG: 62K05;05B40.
Transcoding proxies for mobile World Wide Web access have been developed. In the near future, wideband mobile communication systems such as IMT-2000 will emerge, and these proxies will have to cope with a variety of m...
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Transcoding proxies for mobile World Wide Web access have been developed. In the near future, wideband mobile communication systems such as IMT-2000 will emerge, and these proxies will have to cope with a variety of media such as video. In this article we identify issues involved in viewing a video stream in a mobile computing environment;to handle these issues, we propose a video transcoding system and its control method. These mechanisms provide stable transmission of video data and comfortable video viewing on user clients by estimating the communication conditions, client device capabilities, and user preferences.
Information has two aspects: a quantity to be called 'extent' and a quality which may be termed 'content' since it deals with meaning. The latter originates via selective self-organization, which can b...
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Information has two aspects: a quantity to be called 'extent' and a quality which may be termed 'content' since it deals with meaning. The latter originates via selective self-organization, which can be described also in quantitative physical terms. A prerequisite is the reproducibility of the informational substrate forming the basis of selection. This paper focuses on selection being the analogue of a physical phase transition. In Section 1 the criteria for phase transitions are formulated. Section 2 introduces the concept of information space and describes information as selected points or regions in this space. In Section 3 selection is analyzed in terms of the criteria for phase transitions, and in Section 4 the concept is confronted with experimental data. The conclusion is reached that information content is generated via selection, which can be described as a phase transition in information space. (C) 2000 Elsevier Science B.V. All rights reserved.
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