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Research Institute of Intelligent Computer Systems Ternopil National Economic University |
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2003, Vol. 2, Issue 1 |
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Contents and abstracts
Andrea Attanasio*, Patrizia Beraldi**, Francesca Guerriero*** *Center of Excellence for High Performance Computing,
Universita
della
Calabria,
In this paper a new practical performance index for ranking numerical methods is proposed. Such index may be very helpful especially when several methods are tested and the number of test problems is large, since it gives a concise and precise idea of the relative efficiency of a method with respect to the others, with regard to the selected problems for the testing. In order to verify the reliability of the proposed rule, we have applied it to data extracted from previously published computational experiments. Matanya Elchanani, Tarek M. Sobh, Raul Mihali School of Engineering and Design, 169 University Avenue,
Bridgeport,
CT 06601, U.S.A.
The World-Wide-Web has been used extensively in the past few years of its existence for data exchange, and information gathering. Web online control, on the other hand, is a new emerging field, which has not yet been fully exploited and holds in it a great impact on currently available control systems. This paper discusses an application of online Internet control service – a WWW controlled robotic manipulator arm. O.Postolache*,**, P.Girao** , M. Pereira*, Helena Ramos** *Escola Superior de Tecnologia, Instituto Politecnico de
Setubal,
2910
Setubal, Portugal,
This paper reports the implementation of a neural processing structure as a component of an intelligent measuring system that uses ion selective electrodes (ISEs) as sensing elements of heavy metal ions (Pb+2, Cd+2) concentration. The neural network (NN), designed and implemented to reduce errors due to ion interference and to pH and temperature variations, is of the multiple-input multiple-output Multilayer Percepton (MLP-NN) type. The NN is a component of a virtual instrument that includes a PC laptop, a PCMCI data acquisition board with associated conditioning circuits and the specific ISE sensors. A practical approach concerning the optimal neural processing solution (number of NN structures, number of neurons, neuron transfer functions) to increase the performance of low cost ISEs is presented. Results are presented to evaluate the performance of the NN intelligent ISE system and to discuss the possibility of transferring the acquisition and processing task to a low cost acquisition and control unit such as a microcontroller. V.Hrytshyk*, O.Berezsky** *Research Institute of Information Infrastructure by National
Academy
of Sciences of Ukraine
In paper there are considered main problems, which are appear during images processing and recognizing in real time. Also are proposed methods and high productive parallel means for their solving. Peter Siroky, Rene Hart'ansky, Jan Petrilak Alexander Dubcek university of Trencin, Faculty of
mechatronics,
Paper includes accuracy problems improving the reliability of systems in fields where traditional methods of EMC are not enough. We introduce two basic types of methods. First, methods of software redundancy and second methods of time redundancy. BASE STRUCTURES OF HASH OPERATIONAL UNITS FOR IPSEC PROTOCOL PROCESSORS Korkishko L.M.*, Korkishko T.A.**, Shevchuk R.P.*** *Department of Information Technologies Defence,
lk@tanet.edu.te.ua
This work dedicated for base structures of hash operational units for IPSEC protocol processors. MD5 and SHA-1 hash algorithms characteristics have been considered. The base operations of the hash algorithm were discussed. Using these base operations the structures of hash operational units were distinguished. Design of hash operational units structures is based on the algorithm specialized combinatorial matrixes. The analytical expressions of hash operational units timing characteristics were deduced. We have been synthesized SHA-1 hash algorithm base operation on field programmed gate array. Using the results of timing estimation from EDA tools and deduces expressions, the graphical representation of timing characteristics of base structures of hash operational units for IPSEC protocol processors were received and expedient areas of their usage have been marked out. Tarek K. Alameldin*, Norman Badler*, Tarek Sobh** and Raul Mihali** *Department of Computer and Information Science,
An efficient computation of 3D workspaces for redundant manipulators is based on a “hybrid” algorithm between direct kinematics and screw theory. Direct kinematics enjoys low computational cost, but needs edge detection algorithms when workspace boundaries are needed. Screw theory has exponential computational cost per workspace point, but does not need edge detection. Screw theory allows computing workspace points in prespecified directions, while direct kinematics does not. Applications of the algorithm are discussed. Bogdan Kizlik*, Vitalij Nichoga**, Petro Dub** *Institute of Fundamental Electronics, Electronic Department,
Military
University of Technology,
The problem of determination of group velocity and dispersion coefficient in the distributed sensor of vibration in fibre optic Michelson’s interferometer configuration is considered in the report. Influence of acoustic wave on optical wave in a Bragg modulator is described. It is shown that such interferometer can be used as a distributed high sensitive sensor of mechanical values (vibration, acoustic wave, pressure, displacement). M. Pereira*, O. Postolache*,**, P. Girao**, Helena Ramos** *Escola Superior de Tecnologia de Setubal, Instituto
Politecnico de
Setubal, 2914-508 Setubal, Portugal,
A low-cost absorbance meter for dissolved compounds identification and concentration evaluation is proposed. The main elements of the system are a white light source and a set of three colored light-to-voltage converters. The system includes auto-calibration capabilities and compensates spectral sensitivity variation of the optical source and detectors. A neural network-processing scheme is used to identify dissolved compounds and evaluate the correspondent concentrations. E. Tikhomirova Belarussian State University of Informatics and
Radioelectronics,
This research is focusing on an implementation of the discrete processes control loop for technological systems. The object-oriented technology is employed. Production systems are used as a basis for the problem resolution. Problems of a production system interpretation are solved using processes interpretation scheme of nets structures. Koschinsky S.L., Sholonik A.P., Ustinov P.S. Radioelectronics Department,
The derivation of developed symbolic models of dynamics of voltage mode controlled buck converter operated both in discontinuous and continuous conducting modes is given. DEVELOPMENT OF DISTANCE EDUCATION SYSTEM IN ICIT TANE Igor Bilousov, Oleksander Novosad, Oleg Adamiv Ternopil Academy of National Economy
The presented material particularizes peculiarities of distance education functioning based on the experience of European and North American countries. Also we consider using such education system in Institute of Computer Information Technologies (ICIT) of Ternopil Academy of National Economy (TANE). M.Nedashkovsky Ternopil Academy of National Economy
New approaches for
solving of
non-linear
polynomial equations by branching chain fractions are proposed. For
records
of matrix polynomial solution there are proposed algorithms, which
allow
to obtain development of sought unknown quantities to so called figured
J-fractions, Ò- fractions and Ñ- fractions, and also periodical matrix
branching fractions of canonical forms.
NUMERICAL MODELING OF MOMENT METHOD FOR ANTENNA SIMULATION Rene Hart'ansky Dusan Maga, Peter Siroky Alexander Dubcek university of Trencin, Faculty of
mechatronics,
Paper includes accuracy problems of numerical computing of wire antennas characteristics, specially resistively loaded dipoles – antennas with varying intristic impedance. One may find here the modification of Pocklington's equation (numerical computation of resistive dipole) to the form, which allows us to decrease the number of dipole segmentation elements. Natalya Yatskiv Institute of Computer Information Technologies
In the paper there are proposed and researched method of reducing of harmonious signals superfluity on the bases of adaptive coding in Galois bases, which are based on registration of 1/8 of period and on analysis of signal parameters. This method allows to reduce data amount, which are registered on the electrical energetic objects. Pierre M. Fiorini*, Lester Lipsky** *Department of Computer Science, University of Southern
Maine,
Portland,
ME, USA, pfiorini@usm.maine.edu,
We discuss analytic procedures for evaluating the availability of parallel computer systems comprised of P processors with N tasks subject to failures and repairs. In addition, we argue, via analytic and numeric examples, that not incorporating the task-stream into the model is an inadequate approach for evaluating system performance. L.Bartkova Institute of Computer Information Technologies
The method of integrated social-economical and ecological factors building using the linguistic approach is represented in the papers, specifically, the method of functions of correspondence of the social-economical zones to the fuzzy sets characterizing social and ecological conditions buildings. On the base of correlation between social-economical and ecological factors and expenses the matrix of the pair comparisons has been built and its characteristics have been investigated. Since the matrix is positive, reverse-symmetrical and coordinated the calculation of its private vector has been simplified. The method of social and ecological factors importance’s calculation as long as the method of integrated estimations of social and ecological conditions is given in the paper. |