the IEC 61499 architecture is a new standard proposed to replace current PLC technologies. this paper aims to develop a guide to migrate from IEC 61131 PLC technologies to IEC 61499 function blocks, especially for PLC...
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ISBN:
(纸本)9781424437597
the IEC 61499 architecture is a new standard proposed to replace current PLC technologies. this paper aims to develop a guide to migrate from IEC 61131 PLC technologies to IEC 61499 function blocks, especially for PLC programmers. Multiple PLC platforms are chosen as examples and transformed function block system is provided. Beyond migration rules, current limitation and cautions during migration are discussed on the final section of this paper.
Despite the many studies that have attempted to develop ldquofriendlyrdquo methods for industrial controller programming, they are still programmed by conventional ldquotrial-and-errorrdquo methods and there is little...
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ISBN:
(纸本)9781424437597
Despite the many studies that have attempted to develop ldquofriendlyrdquo methods for industrial controller programming, they are still programmed by conventional ldquotrial-and-errorrdquo methods and there is little written documentation on these systems. Accordingly, this paper proposes a methodology to model control programs for manufacturing systems that include sequential, parallel and timed operations, using a formalism based on Statechart diagrams, denominated Basic Statechart (BSC). One typical example of application in the manufacturing area is presented as case study to illustrate the proposed methodology.
In this paper we present an approach and a software prototype that enables domain experts to program control software in the automation domain. the approach follows the principles of domain-specific modeling providing...
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ISBN:
(纸本)9781424437597
In this paper we present an approach and a software prototype that enables domain experts to program control software in the automation domain. the approach follows the principles of domain-specific modeling providing a graphical domain-specific language to model the control cycle of an injection molding machine, a user interface to manipulate and monitor the control cycle as well as code generators to generate control code that can be executed by the machine. As result, domain experts like machine operators can manipulate and monitor the control cycle directly on the touch-screen of a machine without detailed software development expertise.
the article addresses a morphological system design approaches. the following methods are briefly described: (i) basic version of MA, (ii) modification of MA as method of proximity to ideal point(s), (iii) reducing of...
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ISBN:
(纸本)9781424437597
the article addresses a morphological system design approaches. the following methods are briefly described: (i) basic version of MA, (ii) modification of MA as method of proximity to ideal point(s), (iii) reducing of MA to linear programming, (iv) multicriteria multiple choice problem, (v) quadratic assignment problem, (vi) Pareto-based MA (i.e., revelation of Paretoeffective solutions), (vii) Hierarchical Morphological Multicriteria Design (HMMD) approach, and (viii) Hierarchical Morphological Multicriteria Design (HMMD) approach based on probabilistic/fuzzy estimates. the above-mentioned methods are illustrated by schemes, models, and illustrative examples.
Combined withthe characteristics of network security audit system, paper introduced the idea of dynamic programming to pattern-matching algorithm, and gave the best dynamic matching algorithm, that is, by solving for...
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ISBN:
(纸本)9781424446568
Combined withthe characteristics of network security audit system, paper introduced the idea of dynamic programming to pattern-matching algorithm, and gave the best dynamic matching algorithm, that is, by solving for matching pairs of local sub-problem, and for the number of different rules, (deleted) to find the best combination for the pattern-matching algorithms, then to achieve the strategy of optimal solution overall. Experimental results show that, the algorithm will greatly improve the efficiency of pattern matching in the network security auditing system.
A micro/meso scale modelling of two-phase droplets move on hydrophilic/hydrophobic surfaces with micro roughness is reported. the physical model is basically of two-phase flow interacting withthe surfaces of differen...
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ISBN:
(纸本)9780791843499
A micro/meso scale modelling of two-phase droplets move on hydrophilic/hydrophobic surfaces with micro roughness is reported. the physical model is basically of two-phase flow interacting withthe surfaces of different hydrophobicity or wettability. Numerical modelling based on the lattice Boltzmann method (LBM) is developed and applied to the computational calculation and simulation. the LBM modelling deals with surface tension dominated behaviour of water droplets in air spreading on a hydrophilic surface with hydrophobic strips of different sizes and contact angles under different physical and interfacial conditions, and aims to find quantitative data and physical conditions of the biomimetic approaches. the current LBM can be applied to simulate two-phase fluids with large density ratio (up to 1000), and meanwhile deal with interactions between a fluid-fluid interface and a partial wetting wall. In the simulation, the interactions between the fluid-fluid interface and the partial wetting wall with different hydrophobic strips such as single strip, intersecting stripes, and alternating & parallel stripes, of different sizes and contact angles are considered and tested numerically;the phenomena of droplets spreading and breaking up, and the effect of hydrophobic strips on the surface wettability or self-cleaning characteristics are simulated, reported and discussed.
A new formulation facilitating the determination of the autocorrelation lags, and consequently the autocorrelation matrix, of an autoregressive moving average signal of arbitrary order (ARMA(p, q)) is presented. the m...
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A new formulation facilitating the determination of the autocorrelation lags, and consequently the autocorrelation matrix, of an autoregressive moving average signal of arbitrary order (ARMA(p, q)) is presented. the main features of our formulation, stated as a set of linear equations to be solved, are 1) its conceptual simplicity 2) its reliance only on primary parameters of the ARMA(p, q) model, and 3) the simplicity of the resulting linear equations.
One of the key issues in developing applications on the new multicore clustering environment is to select a right programming system. Traditional parallel programming system development is usually targeted the develop...
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ISBN:
(纸本)9781424446568
One of the key issues in developing applications on the new multicore clustering environment is to select a right programming system. Traditional parallel programming system development is usually targeted the development of scientific applications. As a result, these approaches lack many features that are necessary for business application development such as powerful graphical development environment, integration with components from various sources, seamless integration with databases. In this paper, the use of Microsoft CCR/DSS runtime system is demonstrated as a viable solution for high performance business application development. the same program can scale from multicore system to clustering environment. A practical logistic application namely, the Pickup and Delivery Problem with Time Window (PDPTW), is used to demonstrate the concept. the experiments show that a good speedup and 80-90% efficiency can be obtained for a realistic optimization problem using Microsoft CCR/DSS on multicore clustering system.
Information technology (IT) companies in India began providing services, in the 1970s, in software programming but now provide varied services such as business consultancy and also business process re-engineering. thi...
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Information technology (IT) companies in India began providing services, in the 1970s, in software programming but now provide varied services such as business consultancy and also business process re-engineering. this paper looks into the scenario faced by such information technology (it) companies which face a shortage of skilled human resources availability from academic institutions. therefore it is very imperative that such companies collaborate with academic institutions in various ways of industry institution interaction (III) such as joint research and development, faculty development programs, technical workshops for students, etc. which goes a long way to bridge the gaps in the academic curriculum. We take a look at how these IIIs help to make such students of engineering more employable when they graduate. this plays a very significant part in the IT success story of India.
In this paper, we investigate post-processing for the frequency-domain blind source separation (FD-BSS) in hearing aids applications. It is known that the segregate quality of FD-BSS degrades severely in the challengi...
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ISBN:
(纸本)9781424446568
In this paper, we investigate post-processing for the frequency-domain blind source separation (FD-BSS) in hearing aids applications. It is known that the segregate quality of FD-BSS degrades severely in the challenging scenario of reverberant enclosures or moving source situations. A robust two-stage dynamic programming approach based on inter-frequency correlation is presented to solving the permutation ambiguity correction problem. Moreover, binary masking method and the non-stationary spectral subtraction techniques are combined to estimate and reduce the residual cross-talk components. the subtraction parameter is adaptively determined by estimated local Signal-to-Noise Ratio (SNR). An optimization scheme is proposed aiming at obtaining a tradeoff between the residual noise reduction and generated distortion suppression. Experimental results show that the post-processing procedure enhances the separated signals and the musical noise is controlled under moderate level.
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