articles
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№ 1(67)
27 february 2017 year
Rubric: Performance management Authors: Ilin I., Lepekhin A., Levina A. |
The demand for MES-systems is significantly increasing nowadays in the Russian and world markets.
MES information systems provide IT services to support the operational management of production
processes, which form the basis of the finished product cost. MES implementation projects are particularly
complex, as they are often introduced into the existing enterprise architecture and are designed
to be an effective link between the technological preparation and production on the one hand and ERP
systems on the other. This paper discusses the key challenges of MES implementation projects, analyses
particular elements of PRINCE2 standard and their adaptability for IT projets, and describes the
way of adaptation of PRINCE2 key elements to manage implementation of MES by 1C — one of the
most famous information system developers in Russia. The adaptation proposed can form the basis of
a unified methodology of 1C MES-solutions implementation approach, which currently does not exist.
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The paper focuses on analyzing development programs for complex organizational and technical
systems. Such programs comprise projects and program events linked with each other by relations of
precedence. The programs exert influence on maturity of managed objects and have certain financial
consequences. Distinctive features of such programs include impossibility of assessment of their results
in financial terms, as well as availability of stochastic characteristics. Stochastic nature of key parameters
of development programs (projects durations, time lags between projects and events, power of
impact on maturity and financial metrics) makes it possible to apply discrete-event modeling. Special
attention is paid on complicated projects of three types: with uncertain outcome, with possibility of reimplementation
and with few variants of implementation. As a modeling tool, timed stochastic Petri
nets with certain attributes of places, transitions and arcs are applied. Different time lags are described
by the means of holding durations assigned to the arcs. For complicated projects, special routing policies
allowing stochastic selection of firing transitions are used. The modeling approach allows analyzing
consequences of potential development programs, including both their effects and related expenditures.
In turn, the modeling results help to justify decisions regarding comparison of alternative
development programs and selection of one of them for implementation.
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№ 1(67)
27 february 2017 year
Rubric: Automated control systems Authors: Berman A., Nikolaychuk O., Pavlov A., Yurin A. |
The paper presents the models and methods for creation and application of hybrid intelligent systems,
providing solvingthe unformalized multidisciplinary problems in the field of the reliability and
safety of chemical and petrochemical manufactures in terms of processing large volumes of information.
The self-organizing algorithm based on parameters of the order and cybernetic control circuits
is proposed. The algorithm allows forming the structure and functions of the decision-making system
when obtaining the information that is not presented in the models.
An aggregate simulation model for a description of the equipments investigated is presented. The
feature of the model is the use of analytical models to determine continuous changes of the technical
conditions, and methods of artificial intelligence for discrete changes. The self-organizing algorithm
and simulation gives opportunity to solve inter-and multidisciplinary problems on the basis of aggregation
of goals and objectives of specialists of different scientific fields, and an adequate exchange of
information among them on the decisions made and the results achieved in various stages of investigation.
Integration of knowledge and increased the effectiveness of decision making in the field of
the failure risk reduction are the main result of the joint application of the self-organizing algorithm
and simulation.
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№ 1(67)
27 february 2017 year
Rubric: Automated control systems Authors: Spivak S., Gubaydullin I., Koledin S., Koledina K. |
In the first stage of determining the optimal mode is necessary to conduct a theoretical optimization
process, i.e. to find the best values of the control parameters, without asking their feasibility. The paper
shows the formulation of optimization criterion in terms of economic efficiency. Theoretical optimization
of the catalytic process can be based on a kinetic model of the chemical reaction. The concept
of information-analytical system of theoretical computational optimization of catalytic processes determined
by the methodology IDEF0. Thus, the input parameters are: reaction mechanism, the experimental
data and some physical and chemical limitations which characterize the specificity of the process —
these options are needed to build a kinetic model of the reaction, as well as the optimization criterion required
for optimization problem formulation. The result (output) of solving the problem is an improved
process, the formulation of optimal process conditions. Management is the methods used in solving the
problem. And as a mechanism performs data-processing system is theoretical, analytical optimization of
catalytic processes. As the object of optimizing is catalytic process of interaction alcohols with dimethyl
carbonate, which refers to the reactions of the «green» chemistry. A mathematical model of chemical kinetics
is a system of nonlinear ordinary differential equations with initial data, ie, the Cauchy problem.
For this reaction was build kinetic model, determined the rate constants and activation energies. As the
economic optimization criterion chosen process profitability. For the calculations took the relative values
of the cost of reagents and energy of the total flow. Changing of profitability used in the case when
the costs considered of reagents and energy. It was determined that the profitability out to the maximum,
and decreases with time, due to the cost of maintaining the desired temperature. With increasing temperature,
the maximum profitability comes first. Moreover, increasing the catalyst concentration to 0.05
mol/l does not increase the profitability. Then, the optimal value of the catalyst is 0.03 mol/l.
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№ 1(67)
27 february 2017 year
Rubric: Automated control systems Authors: Burljaeva E., Gavrilov A., Tereschenko G. |
The justification of technological schemes design automation significance for the chemical industry
application area is provided. The solution by developing of the specific application area oriented tools
is suggested. Proposed combination of custom formal system and domain specific languages approach
provides the means to technological scheme model manipulations. These manipulations includes as
schemes development as their validation according to subject matter expert restrictions and recommendations.
To support it, formal system should include both experimental and industrial production
technological schemes description languages and these languages constructions mutual mapping. The
set of requirements to such formal system and its elements is defined. In addition we demonstrate the
promising of the proposed approach with joint development of the formal system main components.
The resulted formal system gives us the ability to develop as experimental production technological
schemes as derived industrial ones with real practical capacities and constraints accounting.
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№ 1(67)
27 february 2017 year
Rubric: Models and althorithms Authors: Bragin A., Gerasimov M., Logunov M., Navletov N., Pyanzin D., Spirin A. |
The aim is to develop software for the automation of the work of the magneto-optical device. The paper
describes the developed automated devices for the study of magneto-optical materials. Materials for
this study thin film with a magnetic anisotropy in which the two-dimensional ordered domain structures
can be formed. These materials are transparent in the infrared and visible spectral range and exhibit a
magneto-optical Faraday effect. Domain structures are of interest for the creation of controlled diffraction
gratings, baffles, switches, fiber-optic communication lines, etc. The device can change the external
influence on the sample, analyze and recognize objects (digital images), highlight the region with
the labyrinthine domain structure. External influences may be magnetic and thermal fields. Formation
of ordered two-dimensional domain structures in the material depends on the parameters of the external
field: the pulse duration, intensity, direction, offset voltage, the direction of DC offset, etc.. The device
allows you to get the equilibrium labyrinthine domain structure and register settings of external
fields. At present, the developed software is used in conjunction with a magneto-optical device for materials
research at the Department of Radio Engineering, National Research Mordovia State University.
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