ISSN 0236-235X (P)
ISSN 2311-2735 (E)

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Higher Attestation Commission (VAK) - К1 quartile
Russian Science Citation Index (RSCI)

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2
Publication date:
16 June 2024

Articles of journal № 2 at 2015 year.

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Public date | Title | Authors |

1. Modeling surface disturbance from the object moving in fluids [№2 за 2015 год]
Authors: Barulin А.V., Kulakov I.S.
Visitors: 6055
The problem of calculating environmental disturbance caused by object motion can be stated in many practical cases and dif-ferent objectives that can be: assessment of bogy characteristics and body flow when designing an object, calculation of obj ect motion pa-rameters (natural experiment is frequently changed by numerical simulation), research of flows and dam breaks, creating technologies of flu-id material processing. This problem can also be solved as one of 3D image synthesis stages of object motion in outside envir onment. When considering objects moving across water surface, we can face the problem of creating a dynamic image of interface disturbance (water and air). Talking about real-time image synthesis, an acceptable solution should be made in limited time. The results of this research were r e-ceived after searching synthesis methods of realistic 3D video reflection of object dynamic motion. However, the methodology as a base can possess communality. The paper considers an object moving with not high speed (about several meters per second) in fluid in a surface layer with some (any and in general changeable) deepening. It is required to calculate liquid surface disturbance, which caused by object motion.

2. A problem-oriented editor for design of rule-based knowledge bases [№2 за 2015 год]
Authors: Berman A.F., Grishchenko M.A., Nikolaychuk O.A., Yurin A.Yu.
Visitors: 9789
The paper describes a modification of the universal editor for design of rule-based knowledge bases. The de-scribed modification of the editor is intended for assessment of technical conditions and operating life of petrochemical equipments. The article also presents architecture, main functions and a structure of files for configuration of the editor. The feature of the modified editor is a semantic layer. This layer provides setup of the editor according to the features of subject domain as well as its integration with inference engines. This provides the ability to test developed knowledge bases . The semantic layer is implemented as a set of templates describing facts and rules (cause-and-effect relations) in prob-lems of technical conditions and operation life assessment. The templates allow abstracting from the syntax of knowledge representation languages (programming languages for knowledge bases, in particular, CLIPS – C Language Production Sys-tem). The second part of the semantic layer is the algorithms that provide dynamic creation (generation) of elements of user interface. The editor is used for developing knowledge bases to examine industrial safety of petrochemical equipments. Application of the editor reduces the participation time of a knowledge engineer in the process of design a knowledge base and provides opportunities for experts to complement the knowledge base in the operation of the expert system.

3. Ambiguous semantics and incorrectness when working with C# threads [№2 за 2015 год]
Author: Billig V.A.
Visitors: 9014
Modern processors are multi-core. Increasing computing power by increasing the number of pro-cessors and the number of cores in each processor will only be progressing. Changing of hard leads to changing soft. As a result, parallel computing becomes one of the main directions of modern programming. When programming in C#, parallel computing is supported by the mechanism of threads created by an oper-ating system. You can create a thread object of the Thread class and associate a certain piece of code with it. It seems natural that when you create a program object of Thread class, the operating system creates a physical thread which will execute the code. For example, it occurs with file objects – creating a file object in the pro-gram leads to the creation of a physical file. The article shows the situations when the “natural” semantics takes place, as well as the situations when crea-tion of program thread does not create the physical thread. The author provides recommendati ons for optimizing the degree of parallelization in recursive methods and in methods without recursion. The research has made it possible to detect the situation when interaction of two important mechanisms (threads and anonymous methods) leads to incorrect work. The constructed examples show incorrect work of anonymous methods when paralleling.

4. Investigation of the load prediction methods in computer and computer systems [№2 за 2015 год]
Authors: Brazhnikova Yu.S., Goritsky Yu.A., Kutepov V.P., Pankov N.A.
Visitors: 7292
The problem of process and resource management in large scale computer systems with thousands of components is important and has not been solved yet. Thus, a user has to determine the amount of resources needed for a computer system in advance and distribute parallel program fragments to achieve a desired acceleration effect and minimize resource usage. However, even for simple paralleling logic problems such a static planning strategy results in average resource utilization is no more than 15–20 %. The paper is devoted to the problem of computing system load level forecasting to create adaptive methods and algorithms for resource dynamic management and optimization algorithms. The paper presents the data of an experimental investigation of predicting workload of processors. It is based on various filtration methods of high-frequency signal which is processes assessable workload. The results show that among well known filters the median filters are the most precise. The results are used for the development of adaptive algorithms intended for resources optimization, in particular, for allocation of processor resources in computers and large computer systems.

5. Early warning system of drinking water quality parameters violation [№2 за 2015 год]
Author: Bubyr D.S.
Visitors: 10046
Nowadays water treatment process is significant and of great interest due to the difficult environmental situa-tion caused by industrial and household activities of people. It is important to maintain the water treatment quality at the proper level, as it directly affects human health. Eventually the state of the water source may be changed, so it is necessary to adapt the water treatment process to these changes. It is necessary to constantly monitor not only the state of an incoming wa-ter source, but also the results of each water treatment. An early warning system was developed to response to a possible ab-normal situation, in which drinking water quality parameters are out of rage, in time. Physical and chemical parameters of water source and drinking water obtained after purification as well as operated factors, which affect the water treatment quality, are controlled regularly and form time series system. The procedure of possible abnormal situation detection consists of two stages. The first stage includes modeling and forecasting the water source state factors based on vector autoregression approach. At the second stage piecewise linear regression dependences of quality factors (with a response break) from physi-cal and chemical parameters of water source and operated factors, which characterize the work of water treatment system, are used to forecast drinking water quality parameters. In addition, for each indicator of drinking water quality there is its own model of optimal order based on the modeling sample of the optimal volume. The system quality is estimated using a test sample.

6. Decision-making in high-tech products production systems [№2 за 2015 год]
Authors: Burdo G.B., Vinogradov G.P., Isaev A.A.
Visitors: 8675
The features of multiproduct production (MP) of high-tech products are determined by simultaneous performing a large number of orders while solving its development (evolution) problems. Filling of orders shall be performed within a conc eptual scheme that defines the long-range and tactical MP goals. MP functions under uncertainty when the manager is unable to accurately determine the external environment state. As a consequence, he has a hard time choosing a course of action. To remove uncertainty in decision making it is appropriate to use subjective assessment of the situation and a solution vari ant obtained on the basis of agreement of all concerned parties. This problem is primarily related to the difference in the perception of choice when fill ing the orders by production staff. To solve this problem the authors suggest an information theory of hierarchical systems and the theory of active systems as a theoretical basis. However, the development of practically useful decision-making models in hierarchical sys-tems, where there are no antagonistic contradictions due to common goals and interests, is far from practical completion. According to the authors, the solution of this problem is in the specificity of modern high -tech production that operates under risk, uncertainty and dynamics of both external and internal environment. The paper presents the mathematical statement and description of the agreed decision-making problem. They suppose that the agents which control their subsystems know and “feel” their controlled objects as they see them. They allow “playing” different pro-duction situations. The paper shows a model and an algorithm for making coordinated decisions which become the basis for an ex-ample of using the method in the typical company.

7. Expert system for monitoring of technological processes [№2 за 2015 год]
Authors: Burov A.N., Kalabin, A.L., Kozlov A.V., Pakshver E.A.
Visitors: 12828
The authors describe an expert system for technologists who work in polyacrylonitrile fibers production. It can help to process and analyze data. The expert system is a part of a larger software system for monitoring technological pro-cesses. The aim of the monitoring system is to gather, store and process data about the state of technological process parame-ters. The expert system analyses data stored by the monitoring system. It consists of two parts: the module for rule creation and the module for rule checking. The module for rule creation allows technologists to store their knowledge as a set of rules in a database. This feature helps to store technologists experience and pass it to other specialists. Every rule includes IF and THEN parts. The IF part contains various logical conditions. The THEN part has conclusion that should be made if logical conditions are true. The system allows creating complex rules based on other simple rules. The module for checking rules al-lows specialists to apply some rule to data set and check logical conditions against that data. The article describes system ar-chitecture and its place in the monitoring system. The work of the system is demonstrated on data from the real process of correlation assessment.

8. Implementation of a case-based module for intelligent systems [№2 за 2015 год]
Authors: Zo Lin Khaing, Ar Kar Myo, Varshavskiy P.R., Alekhin R.V.
Visitors: 14150
The paper considers important problems of applying a case-based approach in modern intellectual (expert) sys-tems. In particular, in decision support systems focused on assistance to a decision maker when managing complex objects and processes under uncertainty in input data and expert knowledge. Using the mechanisms of plausible reasoning and Case-Based Reasoning (CBR) is directed to expanding the scope of application of intelligent systems under uncertainty as well as reducing time to find solutions. To implement a case-based approach, the authors propose a network (ontological) representation model of cases and hy-brid case retrieving algorithm which is based on the structural mapping theory and the nearest neighbor method. In addition, the paper discusses the possibility of optimizing (reducing) a knowledge base (use case base) of a case-based system (CBR system) using clustering methods. The article proposes CBR system architecture based on the proposed case-representation model and retrieving and opti-mization algorithms for a precedent base (accumulated experience of the system). The authors describe the features of soft-ware implementation of the basic modules of CBR-system prototype in MS Visual Studio 2010 using the Protégé ontology editor for MS Windows. Effectiveness evaluation of the proposed approach and developed software has been carried out on several test data sets offered by the Department of Computer Science, University of California (UCI Machine Learning Re-pository).

9. Information support system of fuzzy evaluation and consistent optimization [№2 за 2015 год]
Authors: Veselkov A.N., Kuznetsov V.N., Doropey V.N.
Visitors: 8695
Enterprise management is considered as a serial or network decision-making process in fuzzy condi-tions. People operate with fuzzy concepts and fuzzy instr uctions. Fuzziness is the main source of uncertainty in the process of coordinated optimization. People use fuzzy concepts and perform fuzzy instructions when making dec i-sions. In addition, in many cases they have different opinions on specific problems an d ways to solve them. In activi-ties, people tend to operate with vague concepts and perform vague instructions. Fuzzy sets and approach to decision -making in fuzzy conditions allows creating a decision support system for information technology such as "1C: Enter-prise 8.3". A decision-making group makes decisions. This group consists of the Center (operation researcher), who is respon-sible for making decisions for the entire enterprise, and agents, who make decisions for their units. The Center and agents are users of a local network for group decision-making support. If the Center solves the problem of optimal so-lutions on the basis of interests, this solution, in general, cannot be optimal for the elements. Elements in accordance with their interests will distort the information provided to the Center, or will not use the information system. To avoid that, the Center should provide the elements with solutions, which are favorable to them. But to do this for the Cent er and agents at the same time is not always possible. Therefore it is better to apply consistent optimization solutions. A method of system analysis for decision-making to create an electronic document management system is based on the consistent control principle and the rules of consistent planning; it includes heuristic procedures and fuzzy logic.

10. Formation of agent’s representations of the domain in a situation of choice [№2 за 2015 год]
Authors: Vinogradov G.P., Shmatov G.P., Borzov D.A.
Visitors: 8917
The work is relevant due to the fact that the IT effectiveness in managing a multi -agent system under uncer-tainty depends on how the agents with their help shape their own subjective understanding of the properties of choice situ a-tion. To create a “correct impression” the agent (subject) collects information for “removing” various uncertainties and form-ing a hypothetical model of the situation of choice. The objective of the work is development of modeling techniques aimed at identifying mental strategies of a specific agent by analysing its behavior, speech patterns, non-verbal reactions in situations of purposeful state, selection and operating ways. This involves interaction of a researcher and an agent. In the process of this interaction specific cognitive, linguistic and behavioral skills are revealed. They are used by the subject in the situations of choice to achieve desired results. They, in turn, reflect a value system, norms, potentials, beliefs and knowledge of a specific subj ect. These patterns are represented in shaping decisions and implementing them in the behavior. In this connection, it is of interest to develop mathematical models that take into account the agent's behavior based on the theory of fuzzy systems and the th eory of relations as well as to prove the possibility of application of fuzzy measures for including subjective evaluations in the selection model. The authors chose following research methods: general methodology and methods of system analysis, analytical model-ing and methods of theories of set, theory of active systems, decision making theory, theory of artificial intelligence, theo ry of fuzzy systems and fuzzy logic, game theory. The paper investigated the structure and types of agent’s representations about the purposeful state situation. Based on subjective perceptions of reality the authors formalized a model of choice. It is shown that the description of concepts through agent’s language form a model. The agent assesses this model using the terms of the linguistic variable “conviction of the utility”. This assessment expresses the agent’s confidence in usefulness of the model-presentation for transition from one purposeful state to another. The paper shows how this assessment changes as new information is being received. To cal-culate the membership function it is proposed to use the Zadeh’s compositional rule. There are evaluates to describe the level of agent’s confidence and a degree of doubt in the usefulness of its ideas. It is shown that when the agent evaluates its repre-sentation using a set of parameters, the representation quality under uncertainty can be evaluated using fuzzy integral. This technique allowed the authors to propose the algorithm of a certain level of agent’s conviction in the us efulness of its ideas. There is a description of the algorithm application in medical diagnostics.

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