Software & Systems

Articles of journal № 1 at 2013 year.

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11. Artificial world's: spatial organization principles [№1 за 2013 год]
Author: Kol’chugina, E.A.
Visitors: 9890
The artificial world is a specially organized computing environment where the development and improvement of the populations of competing artificial organisms realized as mobile software agents take place. The basic principles of such an environment play the defining role in the process of artificial organisms's formation. The spatial organization of artificial world is very important for mobile software agents’s populations evolution because of the influence on optimal strategy choice of agents's movements. It also define the rules and possibilities of agents’s interactions. In this paper the spatial organization of the agent-oriented artificial world’s models is considered. As a rule, the space in artificial world’s models is considered as a cellular, and models in general belong to one of two main classes: cellular automata or multidimensional Turing machines. The space in the given model is also considered as cellular, but the principle of hierarchical multilayer organization of each single cell is entered. According to this principle, each cell is an infinite set of layers, and each layer is identified by non-negative integer number. This allow to easily separate artificial organisms according to their species and functional purpose on hierarchically organized levels. The hierarchical organization make possible for organisms belonging to higher levels to control the organisms at lower levels. In the offered model the artificial organism can leave in each cell the labels similar to feromon traces of the insects in real world. This labels are accessible for organism and are necessary for making subsequent choice of moving direction. The example illustrating the influence of the model's space topological properties on the organism's speed of moving (dif-fusion) and the winning strategy of movement, is given.

12. Conceptual framework of building security code analyzer [№1 за 2013 год]
Authors: Markov A.S., Фадин А.А., Tsirlov V.L.
Visitors: 15070
The problems of software security audit automation and support of decisions about software defects are considered. A comparative analysis of known static code analyzers is done. The applicability of static signature analysis (on pattern) to identify defects and vulnerabilities are justified. The principles of construction and structure of the security code analyzer that combines syntactic and semantic code analysis are proposed. The requirements for the signature database are described. The algorithm of the operation of the security code analyzer is given. The efficiency of the proposed solution in terms of adding new languages and programming environments as well as new classes of security defects is shown. The example of the security parser code that demonstrates its effectiveness in identifying a broad class of defects and vulnerabilities is done.

13. Mathematical modelling of thermal processes in layered structures [№1 за 2013 год]
Authors: Дубский Г.А., Егорова Л.Г., Кухта Ю.Б.
Visitors: 9526
One of the major factors promoting increase of efficiency of functioning of units of continuous molding of preparations, ensuring working capacity and optimum technological operating modes of the equipment is. For increase in service life of crystallizers now resort to certain technological modifications of their working walls. This improvement of quality of a surface of a crystallizer at the expense of use of special alloys or coverings on a surface of a copper wall. Physical and mathematical simulation of thermal process of system «metal melt–a coating–a crystallizer pan wall» at the moment of steel priming is in-process presented. The software product which use allows to track character of an establishment of a temperature field at a heatstroke at the moment of steel pouring is developed for mathematical modelling; to analyse a temperature field from time in a covering and a wall of a crystallizer and to define the maximum size of temperature. The results received during use of the software product, were used at a choice of optimum modes of a covering from nickel on an internal wall of a crystallizer for increase of wear resistance of the equipment without decrease in quality of finished goods.

14. A method for choosing peers in peer-to-peer communications based on network topology [№1 за 2013 год]
Authors: Соловьев В.П., Павленко Н.В.
Visitors: 6050
The article shows necessity of peering mechanims for transferring multimedia data between nodes of the global netwotk. It discusses the problems of choosing peers for transferring data streams in modern peer-to-peer networks. A new method is introduced which solves this problem using information about the topology of the global network. The article introduces an algorithm for hierarchical node clustering and new methods to use this information for building connections between the nodes of the peer network. Properties of the model of a computer network and peer network for simulation are described. The results of simulation of such peer network based on the proposed method and without it are shown. The data collected during the simulation confirm the efficiency and suitability of the proposed method.

15. Data support method for structural-complicated projects implementation [№1 за 2013 год]
Authors: Dopira R.V., Kordyukov R.Yu., Лобузько А.В., Begletsov A.A., Talalaev A.B.
Visitors: 9211
The development objective of the data support method for structural-complicated and spread out over a period of time and distance projects implementation is worded and formalized. Project is understood to be the whole complex of activities needed to achieve the goal. Those activities are connected by ordering relation (imperative precedence). Moreover, the duration of each activity (determined or random) is known. Transition to market economy, domestic and international situation changes that complicated with crisis developments in national economics reasonably cause the need to critically analyze the methods of meeting the state product requirements and to work-out brand new approaches to these issues. Problem solving method is based on the application of network planning and network management tools, on the idea of critical path optimization. In addition, known methods are updated for consideration of stochastic factors that have an effect on duration and probability ofuccessful completions of project activities. Climatic effect on the project process is taken into consideration by dropping execution of work intensity depending from calendar time when counting the critical path of the project graph which determines the time of project implementation as a whole. Suggested methodology for operational control of project implementation allows to address the consequences of untimely or incorrect implementation of certain project activities. Functional test of suggested method is carried out using presented simulated model.

16. Call routing problem solving method based on a new term relevance estimation [№1 за 2013 год]
Authors: Гасанова Т.О., Сергиенко Р.Б., Semenkin E.S., Минкер В.М.
Visitors: 7152
Call routing based on Natural Language Understanding remains a complex and challenging research area in machine intelligence and language understanding. This challenge is due to the difficulty in automated natural language understanding. This paper focuses on the design of algorithms which are able to outperform existing methods on large dataset and do not require morphological and stop-word filtering. The proposed approach decomposes the classification problem into two steps: detection the residual class and utterance categorization to meaningful classes. Class residual includes utterances which cannot be assigned to any useful class or which can be assigned to more than one class. We present the new formula for term relevance estimation which is a modification of fuzzy rules relevance estimation for fuzzy classifier. Using these formulae for only 300 frequent words for each class we achieve an accuracy rate of 85,55 %.

17. Modelling in sphere of management of pulse protection against explosion and a fire [№1 за 2013 год]
Author: Кряжич О.А.
Visitors: 8241
In the article of feature of potentially dangerous object are reflected. It is necessary to consider these features in models of object. The variant of supporting pulsed fire and explosion protection for chemical factory modelling was considered in the article. Modelling is made for pulse protection frames from explosion and a fire. It is new technology for which model and management methods to develop follows. Models offered in work are base. There were made conclusions according to practical implementation of the models and study’s perspectives.

18. Multitexturing with shaders [№1 за 2013 год]
Author: Fedorischev L.A.
Visitors: 9441
Different types of textures and methods for texture visualization are considered. There are described problems of program creating, storing and using of complicated big textures, combined multilayer-tiling textures with subtextures repeated on whole area. Particular attention is given to the problem of the memory volume required for big textures and to the methods for the problem solution. Vertex and pixel shaders are described; ways of applying of shaders for creation and use of program textures are considered; features of Flash shaders are shown. There are demonstrated shader methods for the above mentioned problem for different combinations of input layers of subtextures (tiling subtextures, textures with two layers of subtextures, multilayer textures with tiling subtextures) and suggested the concrete algorithms of such shaders creation and their practical realization on the shader language AGAL in the Flash. At the end of the paper the practical example is demonstrated that shows all the advantages of using of the suggested shader algorithms for economy of the textures memory volumes for tens and hundreds times. Besides the considered algorithms can be applied at other shader technologies, not only in the Flash.

19. A method of constructing an aggregate adaptive caching algorithm [№1 за 2013 год]
Authors: Бурилин А.В., Шефова Н.А., Гордеев Р.Н.
Visitors: 8376
The paper is focused on the problem of data caching in the client-server architecture. Today the problem of constructing caching algorithms is very relevant and a lot of implementations are proposed, but there is a field for further research. The construction of adaptive caching algorithms is especially important. In this paper we generalize adaptive algorithms by adding a control parameter in an aggregate model of the caching algorithm that is responsible for the degree of influence of aggregation algorithms.

20. A method for classification of objects based on a modified analytic hierarchy [№1 за 2013 год]
Authors: Гордеев Р.Н., Бурилин А.В.
Visitors: 10113
We are going to investigate the problem of the multi-criteria decision-making under conditions of undetermined information. A method of classifying and ranking objects using a modified method of analytic hierarchy process, which is based on the method of comparing objects of alternatives based on the theory of possibility and Dempster's rule, which allows to select alternatives under incomplete, inaccurate and uncertain expert's information was proposed. The proposed approach avoids the construction of a complete matrix of pairwise comparisons of alternatives required for the application of the classical method of analytic hierarchy process and most of its modifications, by adding the frame of differences as a basis for comparison of alternatives. In addition we proposed a method of ranking alternatives, based on the theory of possibilities. The proposed methods are illustrated on the example of estimation models alliances between banks and insurance companies.

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