Vol 13, No 4 (2012)

The author suggests analytical optimization procedure for modeling of technical processes realization on computer nets of automation control systems.

The author considers the existing approaches to quantitative assessment of technical system structures. The results analysis of tenacity of detachable connection of hydro-turbine lid in a case of emergency, at progressive failure of load-carrying elements, are presented. The indexes of tenacity versus the number of failed elements are defined, on the basis of stress-strain state modeling.

Let K be associative and commutative ring with identity. In the article we study local derivations and local automorphisms of algebra R of lower niltriangular n×n matrices over K and associated with R of Lie algebra. Their descriptions are completed under n = 3 and when K is a field, under n = 4.

Lithium-ion accumulators in which fulleride-lithium composite films of hexagonal graphite and turbostratic graphite (TG) plates were used as negative electrodes are the subject for research, described in the article. The metallic lithium plates were used as positive electrodes in all the accumulators. Wile using turbostratic graphite as anode, the maximum value of discharge current was observed, which 1,5 times excided the maximum current for hexagonal graphite. By results of X-ray photoelectron spectroscopy it was determined that the thickness of active layer (the layer of anode which was intercalated lithium ions) for turbostratic graphite was 600 nm. The maximum value of the specific capacity was observed underthe use of turbostratic graphite as anode and came up to 244 mA•h/g.

The results of experimental research of loading device of recuperation type are presented in this article.

Simulation model of loading device of recuperation type with improved dynamic characteristics for Micro-CAP program has been developed. Research of characteristics of loading device of recuperation type with cascade connection of impulse and continuous current regulators is performed and described in the article.

The authors consider formation of multilingual information-terminological basis and the model of its study based on Markovian chains. The algorithm of decomposition of informational basis into modules, according to relevance principle, is presented.

In the article the authors present comparative analysis of methods for solution of problem of estimation of protection of automated systems, their features, advantages, disadvantages and products developed on their basis.

The paper presents description of developed software system for analysis of probabilistic and interim characteristics of the fault tolerant software of distributed computing systems with the use of GERT-networks.

This article deals with investigation of the effectiveness of the Particle Swarm Optimization (PSO) [1] algorithm for solving constrained and unconstrained one- and multi-criteria optimization problems. Besides the investigations were conducted both the standard and the binary PSO. Also parallelized modifications of these algorithms were developed for multi-processor operations and two real-world problems were solved.

In this paper we suggest two different multi agent systems for speech recognition problem. The multi agent systems (MAS) are becoming very popular because of their flexibility and applicability to complex problems. The system is based on functioning of different agents that forms the system and interacts with each other. The main profit of using multi agent approach is that every agent can be described as a simple subsystem and the whole initial task can be solved with automatic and autonomous agent actions, interactions and decision making. So the main problem can be reduced to behavior rule base tuning.

Self-configuring genetic programming algorithm with the modified uniform crossover operator, that realizes a selective pressure on the recombination stage, is used for the automated integration of the computational intelligence technique ensembles. Ensemble members are the symbolic regression formulas, the artificial neural networks or their combination. They are also designed automatically with the self-configuring genetic programming algorithm. The comparative analysis of the approach performance is given on the benchmark and real world problems.

The problem of speaker identification is considered in this article. Classification problem Japanese vowels» from UCI repository is used as source data. This problem was solved with a fuzzy classifier as a classification method that is able to extract cause-and-effect relations from source data. A new method of fuzzy classifier rule base design with coevolutionary algorithms was applied. It is multistep fuzzy classifier design based on multiple repetition of previous fuzzy classifier design with self-tuning coevolutionary algorithms. Computational investigation of fuzzy classifier design with coevolutionary algorithms for different numbers of speakers and for different number of the used fuzzy rules was performed. The proposed method allows getting acceptable classification efficiency for a test sample: from 0.985 for two speakers to 0.786 for nine speakers.

The problem offorecasting in various technical, economic, and other systems is an important problem of nowadays. The methods of artificial intelligence and machine learning analyze very effectively various data including financial ones. The main problem of such techniques is the choice of model structure and the configuration of its parameters. In this paper we propose an evolutionary method for the neural network designing that does not require any expert knowledge in the area of neural networks and optimization theory from the user. This algorithm has been applied to the FOREX forecasting task of 13 different currency pairs based on the historical data for 12,5 years. The performance of the proposed algorithm has been compared to the forecasting results of other 6 algorithms. The proposed algorithm has shown the best performance on more than half of the tasks. On remaining tasks the algorithm yields slightly to the multi-layer perceptron trained by the particle swarm optimization algorithm. However, the predominance of the proposed algorithm is more significant.

The Interaction Quality (IQ) metric has recently been introduced for measuring the quality of an interaction with a Spoken Dialogue System (SDS). The metric allows for an estimation of a quality score at arbitrary points in a spoken human-machine interaction. While previous work relied on Support Vector Machines (SVMs) for classifying the score based on a static feature vector representing the entire previous interaction, we evaluate a Conditioned Hidden Markov Model (CHMM) which accounts for the sequential character of the data and, in contrast to a regular Hidden Markov Model (HMM), provides class probabilities. The results show that a CHMM achieves an Unweighted Average Recall (UAR) of 0.39. Thereby it is outperformed by a regular HMM with an UAR of 0.44 and an SVM with an UAR of 0.49, both trained and evaluated under the same conditions.

The authors describe analytical method developed for estimation of errors of identification of coordinates of thermal images given points with remote study of technical condition of overhead power lines and consider a set of main errors of primary parameters measurements, and the algorithm for calculation of its impact on RMS error in determination of coordinates of thermal images given points. The parallel of errors obtained by analytical method with the results of estimations of the errors obtained with the method of statistical modeling is pursued.

The article considers a model of distribution of thermal and dynamic boundary layers distribution in the process of turbulent flow of the gas stream. Expression for determination of energy thickness is presented and expression for the determination of local thermal efficiency coefficient in the form of Stanton criterion. Comparative analysis of the theories of different authors is presented as well.

The authors present analysis of different electrical heaters of spacecraft. Taking into account design and heat limitations, the mathematical models are presented for each of them. Technique for selection of heater parameters, based on limitations dependent criteria and providing for specified heat-flux density, is developed. The obtained calculation data of spacecraft heaters are presented and recommendations on choice of their parameters under uncertainty conditions are formulated.

The authors present theoretical and experimental studies of effect of alloying elements V and Sb on electrical properties of ceramic material based on tin dioxide. Theoretical modeling was carried out with the use of software package VASP, within the frame of formalism of density functional (DFT). Synthesis of ceramic based on tin dioxide was performed by traditional technology, under sintering temperature of 1300 °С, with different concentrations of dope additives of antimony (from 1% to 5 %). Material obtained with the use of vanadium, had low conductivity. Studies of the structure showed the complete dissolution of antimony tin dioxide. The calculations showed that the ceramic activation energy of stoichiometric ratio (SbSn 47O 96) = 1.19 eV of ceramics (VSn 47O 96) = 1.33 eV. Experimental studies have shown that increase of concentration of antimony oxide leads to decrease of the band gap from 1.33 eV to 0.75 eV. The difference between the calculated value of the activation energy of antimony-doped tin dioxide and experimental studies is 19 %.

The article is a presentation of results of modernization of magnetic-ellipsometric complex created by group of authors. Automation ofprocesses of hardware component control is carried out and algorithms of processing of signals of magnetic ellipsometer are realized. Possibilities of the created system were shown on the example of technological cycle of production and in situ of research of structural, optical and magnetic properties of nanostructure of Fe/SiO 2/Si(100).

The article considers features of technology of high-temperature gas-static processing of the cast case details made from heat-resistant and heatproof metals and alloys. Results of researches and optimum modes of processing are presented

The paper presents the results of studies of formation of coatings on the basis of mechanical mixture of amorphous alloy powders Co5 8Ni 10Fe 5B1 6Si 11 and fused corundum Al 2O 3. Morphology is studied, X-ray analysis of coatings is made, electrical and magnetic properties of sputtered magnetic dielectrics with various degrees of ferromagnetic filling and different porosity are considered.

The author considers principles of formation of strategy of social infrastructure. The additional principles which take into account features of social investments are entered. The content of the offered principles is defined concretely with the account of the revealed features of development of social sectors at the present stage, and forms of their demonstration.

In article the concept «capacity of the enterprise» is defined and on this basis its economic-mathematical model, allowing to consider features of capacity of the enterprise as controlled subsystem and quantitatively estimate its realized and unrealized parts, is developed. The offered model in the long term allows to realize system of optimum enterprise capacity control.

In the article the problems and approaches to motivation of operational personnel of a large knowledge-intensive hi-tech enterprise, carrying out to practice innovation activity at rocket-space industry, are considered.

The necessity of the state stimulation of innovative activity of the enterprises of space-rocket branch is proved in the article. The principles of tax and financial incentives of innovative activity of the enterprises of this branch are formulated.