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Main / Archive /'Automation of Control processes' # 3 (21) 2010
'Automation of Control processes' # 3 (21) 2010
Contents
AUTOMATED CONTROL SYSTEMS
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[e-mail:
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]A.Moiseev
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Intellectual Object-oriented Analysis, Design and Development of Computer-aided Systems 
The article is devoted to issues of mining and representation of knowledge in processes of object-oriented analysis, design
and development of computer-aided systems. The subject of investigation is knowledge base of knowledge domain in objectoriented
form. The article deals with features of knowledge-base use during decision-making by concerned persons during
the design of a computer-aided system. It also stresses issue of the use of ontology of knowledge domain, defines an approach
to the creation of computer-aided system of knowledge domain taking into account state-of-the-art trends in information
science and technologies. Knowledge, knowledge control, knowledge representation, knowledge base, virtual enterprise, object-oriented analysis, ontology, knowledge domain, service-oriented technologies, multiagent systems, ontological engineering.
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Evaluation of Minimum Achievable Probability of Reception of Bogus Message in Computer-aided Troop-control Systems
The present article is devoted to investigation of message-processing techniques directed towards considerable decrease of
risk of bogus-message reception in computer-aided troop-control systems.
The article gives defined criteria for generation of a bogus message at the input of an information receiver on basis of
probabilistic graph of state of data-communication system, and a comparative evaluation of probability of reception of
a bogus message both in unidirectional data-communication systems with dependent and independent errors and in feedback
systems. The article also shows that an important decrease of probability of reception of a bogus message in channels of poor
quality is caused by decrease of transfer rate.
It proposes a technique allowing evaluating a minimum achievable probability of the reception of a bogus message in the
systems with given parameters of reception integrity. Computer-aided troop-control systems, data-communication systems, reception integrity, bogus message.
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MATHEMATICAL MODELING
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Simulation of Cycle-phasing Systems With Split Seek
The article presents a developed simulation model of modified cycle-phasing system with split seek, which allows simulating
taking into account a high value of probability and packing of errors, effect of digital-signal slip structure of syncro-groups
and ther location in cycle. Taking these facts into account contributed to the increase of adequacy of the simulation model
with respect to real systems in case of strong non-stationary noise impact. It also gives and analyses the results of the
simulation. Simulation, cycle-phasing system, algorithm of simulation-model operation.
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Techniques of Diversed Reception in Systems of Mobile Communication and Broadband Access
The article deals with techniques of diversed reception, which are widely used in mobile networks of digital radiocommunication
and systems of broadband access, and evaluates noise-immunity when single and diversed (double) reception. It also
considers an orthogonal frequency-division multiplexing (OFDM) as one of techniques of diversed reception in networks of
broadband access on basis of the standards IEEE 802.11a, IEEE 802.11n. Diversed reception, optimum composition, auto-selection, signal-noise ratio, additive white noise, inter-symbol interference, spatial diversity flows, mutiple input, mutiple output.
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Computational Complexity of Algorithms of Correlation Processing of Signals in Radar With Digital Television Illumination
The article is devoted to study of computational complexity of correlation processing of digital television signal reflected by
a target at unknown values of delay and Doppler frequency shift. Several alternative multichannel correlators are considered,
their computational complexities, detection and resolution characteristics are analyzed and compared. Semiactive radiolocation, digital television broadcasting, correlator, computational complexity, rapid algorithm, detection and resolution characteristics.
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ARTIFICIAL INTELLIGENCE
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System of Means for Control of Semantics of Design Tasks and Design Solutions
The article presents a system of means ensuring the control of semantics used and materialized in design tasks thanks to
operational comparison with reality whish underlines a project of computer-aided system. The control is performed in a
version whish is called predicate and ontological control of design-task statement and design-solutions definition. The
potential of the technique of predicate and ontological control contributes to detection of semantic errors, control of design
process as well as development of project ontology and reference natural and professional language which should be used by
developers of computer-aided systems.
The technique of predicate and ontological control is implemented by means of software (C#, .Net 3.5, .Net Remouting) in the
form of a set of facilities embedded in tool environment of modeling WIQA [1] within a system of extensions (plug-in) which
serves solution of logical and linguistic tasks in design of computer-aided systems. Computer-aided design, control of semantics, design tasks, design solutions, system engineering.
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COMPUTER-AIDED ENGINEERING
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Pseudocode Programming of Interface Prototypes in Design of Computer-aided Systems
The article offers and describes a system of tools for pseudocode programming of interface prototypes in design of computeraided
systems.
The specific characters and positives of the system determines the following: representation of typical interface solutions
as precedents whose base is open for access from any workstation per sample of expert systems; possibility of generation
of operational assemblies from standard interface solutions thanks to pseudo-programming bindings and conversion into a
source code in C# language for subsequent dynamic compilation and checks of created interface prototypes in order to detect
their compliance to conceptions and norms.
The system of tools can be accessed from any workstation of corporate network as a special-purpose subsystem embedded
into the tool WIQA.Net. The last one contributes to collaborative conceptual design of computer-aided systems. Pseudocode programming, interface prototype, dynamic compilation.
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