Software & Systems

Articles of journal № 2 at 2014 year.

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21. On practical implementation of active memory model [№2 за 2014 год]
Authors: Myshev A.V., Telnov V.P.
Visitors: 7306
The paper describes a new approach of practical implementation of active memory models to create algorithms and procedures of information coding and decoding technologies for problems of packin g, protection, restoration and the analysis of any format data flows in transfer and storage channels. The methodology of models practical implementation is connected with virtualization of storage channels and channels of data flows transfer or informatio n objects on binary fields of information spaces in information systems and networks. Virtualization and active memory models on binary fields for channels of storage and information objects transfer is shown in the following. Any information object is considered as the binary set, its logical structure is described by active memory model. For m-ing elements of such structure on binary sets in memory are active and passive virtual cells. From a mathematical and logical point of view for practical realization, active memory model has two main functions. First, it defines and sets the scheme and algorithm for creation of optimal information space on a binary set. Second, it defines logical structure for algorithmic schemes of the headings organization for loadi ng information object in information "container" (logical and physical el e-ments) of memory of transfer and storage channels. For practical implementation the authors chose information space configuration in the form of a tuple < X, N>, where X is a final set of N alphabet symbols chains, and N is a final set of binary chains of fixed or variable length. Initial information objects (IO) were described by a tuple , where N is a final set of binary chains of fixed length. And N was defined as a final set of binary chains of variable length for output IO. Information technologies of files packing based on Haffmen and Shannon -Fano's prefix methods were realized within such information space configuration, and optimal information spaces for the packing tech nology to yield the best result are defined. Regularities between capacity and information attributes of file structures on binary fields in coding technologies are defined. Comparative analysis of the practical efficiency for the developed approach regarding software products such as RAR, ZIP, etc., oriented to similar problems solution, identifyed the principal paradigm of the approach: it has a theoretical and methodological development and practical continuation.

22. On the automated survivability evaluation technology and safety for russian navy ships [№2 за 2014 год]
Authors: Lobanov S.L., Blednov D.A., Sorokin V.E.
Visitors: 6687
Many military shipbuilding specialists connect the numerous accidents and disasters which occurred on ships after the World War II with their insufficient survivability. The paper states that the ship safety is the main feature which can withstand accidents and probable damage in the peacetime during the ship service process under routine con ditions. The au-thors analyse the “safety” term, used in the Russian Navy. They also propose an approach to develop an automated assess-ment technology for this term. This method is based on a minimum level criterion of ship operation. The article describes and proves events which should be excluded to ensure such level of the ship functioning. The ship safety criteria definition is based on its functional efficiency of preventing these events by means (systems) of the ship. Definitions and basic parities to describe their parameters calculation are given. It is offered to enter two management levels of the ship and its means (sys-tems) at struggle for safety: low at manual and high at remote control by means (systems) of the ship. The re is an example of possible division of the ship on emergency regions . Their equipment and mechanisms fall within the scope of adverse factors of various accidents. Safety estimations formalization is based on allocation of the functional -independent operations which are carried out by significant elements of the ship means (systems) on maintenance a minimal necessary level of its functio n-ing. It also is based on construction of functional -topological circuits of elements and structural -logic circuits of these opera-tions performance conditions as direct graph. Quantitative values of functional-independent operations performance parame-ters are calculated according to corresponding circuits to logic expressions. The article considers the process of definition of projected ships safety rating according to entered criteria and parameters, as well as recommendations to increase their safety. The concluding part of the paper formulates a number of proposals to improve ships safety of the Russian Navy.

23. EaaS model based approach to cloud services provision [№2 за 2014 год]
Authors: Zalozhnev A.Yu., Chistov D.V., Shuremov E.L.
Visitors: 8304
Prices and potential volumes optimization can be the basis for the cloud services provider’s marketing policy. This activity is aimed to developing and providing with a wide range of cloud services for clients. There are several cloud service models depending on the users’ needs. An EaaS model is considered as a service model. A public cloud is considered as a deployment model. This article discusses one of possible approaches to the provision of cloud computing services by services provider. The potential volume of provider's cloud service is not formally limited in each moment. Payments for cloud services are proportional to times of their use. Cloud services provider is considered as a single profit center. Under ex-penditure means variable expenses for cloud service each species creating and other operating expenses. The other operating expenses add if their allocation to per unit volume of cloud service each type is possible. The cloud computing services pr o-vision optimization problem is reduced to the problem of determining the profit maximizing prices and potential volumes of cloud services. These prices and potential volumes have to maximize the service provider’s operation profit. O ptimization criterion is a quadratic form. The appropriate conditions allow stating that the solution considered corresponds to the profit maximum. The results are valid if no limitations on providers’ cloud services potential volumes. If it is so, then the problem formulation is modified with these l imitations taking into account. This problem is a quadratic programming problem. The computer model based on spreadsheets was developed for calculations. Study results of the obtained model are discussed.

24. Improving data conversion efficiency in mobile robot design [№2 за 2014 год]
Authors: Golub S.V., Nemchenko V.V.
Visitors: 8013
The article describes the system structure technology for data conversion when controlling mobile robot. There are many approaches to data processing organization. They are based on artificial neural networks, fuzzy logic, genetic algo-rithms, inductive algorithms, as well as a combination of different methods. Their main feature is a unique design for specif ic conditions of use. An alternative is to use a hierarchical approach where the general problem is divided into a number of subproblems to simplify the decision-making process. There is an urgent need to find new approaches to data processing sys-tems management for mobile robots, which could connect the mathema tical apparatus of the existing methods with a clear structure of hierarchies. Therefore, a new approach to designing the structure for data conversion system when controlling mobile robot. It is based on the principle of data recycling when forming multi-layer fusion technologies of selected models. It improves the quality of its input parameters.

25. Computer control principles based on user emotional state assessment [№2 за 2014 год]
Authors: Turovskiy Ya.A., Kurgalin S.D.
Visitors: 7869
The paper researches the possibility of using an additional channel of human-computer communication. It is based on the application of functional stress assessment and/or emotional state of a user to optimize the computer control. This assessment allows implementing several strategies of computer control. The user chooses a control channel or a comb i-nation of channels. When the user’s status indicators for this channel are in a state of a rest, the operating system control s the processes priorities based on current tasks. If the user status indicators reflect stress, management of the processes priorities is carried out using computer resources reallocation for programs and processes needed for the user now. If the user uses co m-puter games or multimedia applications, then some components selected by the user are changed according to user-defined settings and his status. Such components as: the state of a "hero" in computer games, games soundtrack and/or the theme accompanying the user’s work, colors of the games and/or colors of a number of elements designed for working with the oper a-tion system (a type and a status of the interface, including graphics). The authors conclude that the use of a proposed "em o-tional channel" to control the computer, in addition to the existing control ones, will significantly increase the efficiency of its work. It also will reduce the time of waiting for the user tasks completion by the operation system, will optimize the multi-media applications functioning, will bring new opportunities to interact with the operation system, will expand the "hero" functionality in the computer games, etc. Further this will provide the introduction of context -oriented interaction elements into the computer control systems, or, in general, into the information and communication technologies.

26. The software-programmable method of interchannel gradient reconstruction of color digital images [№2 за 2014 год]
Authors: Samoylin E.A., Shipko V.V.
Visitors: 6415
The article considers a reconstruction method of failure elements of the color digital image using interchannel redunancy. Nowadays there are vectorial median filters that show their advantage comparing to traditional component -wise image processing. At the same time they aren’t able to de -update lost signal value always authentically because of the limited aperture sample capture, and also in case of overwhelming quantity of faulty elements in an aperture. Meanwhile, redunancy appearing after transition from gray-scale to color images opens new opportunities for restoration of images signals values lost due to interference attack. In particular, in case of distortion of image element brightness in one of color channels, it is possible to evaluate its value using the brightness amplitude of other color channels appropriate elements. The local gradien ts are the difference between the central aperture element and closely-spaced elements. The base of the method is an assump-tion that the local gradients are approximately equal in the image plane of each component. The results showed that this a s-sumption is fair for many real color digital images.The results of modeling show the superiority of interelement gradient r e-construction over median filtering in reconstruction accuracy of the lost or distorted elements of color image components. The results show that the offered method allows receiving higher accuracy of distorted signals restoration comparing to tradi-tional vectorial median processing. The example of the processing the real color digital image shows the efficiency of the presented method. The study results show the possibility to reconstruct interference signals of color digital images using local gradients of nearby channels. The proposed method implies the software implementation and can be used in different co m-puter systems and independent software modules for color digital images processing.

27. Implementation of the parameter optimization algorithm for molecular dynamic force field REAXFF [№2 за 2014 год]
Authors: Shefov K.S., Stepanova M.M.
Visitors: 9655
Molecular dynamic methods that use ReaxFF (Reactive Force Field) allow obtaining sufficiently good results in simulating large multicomponent chemically reactive systems. ReaxFF is implemented in the standard software package LAMMPS. However, pre-optimization of numerous parameters of this force field for a specific system is required for correct computations. This paper presents a parallel program that implements one-parameter search algorithm for the molecular dy-namic force field ReaxFF. The program uses data obtained by accurate quantum chemical computations of characteristics (training set) of chemical compounds simple models for t he optimization process. The parameter search is based on the min-imization of the error function. This is a sum of squared deviations of training set entries computed by ReaxFF from ones computed by quantum chemical methods. The paper describes the parameter search algorithm and shows the program block-scheme. Molecular dynamic simulator LAMMPS is used to search the minimum of ReaxFF potential energy (optimal geom e-try) of the training set models. The package LAMMPS is compiled as a library and linked to the program. The program al-lows searching ReaxFF parameters for arbitrary types of chemically reactive systems. It is necessary for specific numerical simulations of chemical reactions using the molecular dynamic package LAMMPS on high -performance parallel computers.

28. Goal-resource networks [№2 за 2014 год]
Author: Dyundyukov V.S.
Visitors: 11078
The article introduces the current problem of developing methods and models of the weighted and indistinct graphs. This problem is considered in connection with aims of forming multi -agent systems. Creating a multi-agent system involves selecting and joint usage of required resources by agents in organizational network. Nowadays the prob lems of re-sources exchange modeling in case of agents’ interaction and multi-agent systems creation still remain insufficiently invest i-gated. This fact causes the expediency of building organization structure based on goal -resource networks (GRN). GRN are a new type of network models that are developed at the intersection of graph theory, resource and agent theories. Models and methods are developed to formate, operate and support multi-agent systems based on weighted multi-graphs. These multi-graphs are focused on formalization of collective goals formation processes and resources exchange between system participants. The software support system of formation, modification and analysis of GRN is constructed. The article presents software interface for network structures analysis, calculation examples of GRN parameters and network structure selection according to the set numerical parameters.

29. Metamonitoring system for high-performance computing environment [№2 за 2014 год]
Authors: Oparin G.A., Novopashin A.P., Sidorov I.A., Skorov V.V.
Visitors: 8856
The paper discusses an approach to the creation of metamonitoring system for high -performance computing environ-ment intended to solve resource-intensive tasks, and including a lot o f loosely-coupled multivendor computing resources. The basic purpose of this system is to provide the operator of a computing environment with structured and relevant information about a ny computing node status (CPU time usage, RAM, IO -system, network usage, etc.), current equipment state, values of the sensors (tem-perature of processors and motherboards, room temperature), engineering infrastructure devices status and others. The princip al dis-tinctive feature and novelty aspect of the developed metamonitor ing system includes creation of the universal software agents cap a-ble to collect data about state of different environment components from local monitoring systems, to unify and analyze these data, and if necessary to generate and execute automatic control actions directed on changing equipment working mode, including the shutdown in case of emergencies. Each agent of the meta -monitoring system is implemented on the same principles and includes fol-lowing subsystems: data collecting subsystem, database subsy stem, expert subsystem, and control subsystem. The approach is based on web-technologies and multi-agent technologies usage, methods of expert systems creation, methods of decentralized processing and the distributed storage of data. The developed system was successfully approved in the Supercomputer Center of ISDCT SB of the Russian Academy of Sciences.

30. The system for multi-criteria decision analysis decernsmcda and its practical application [№2 за 2014 год]
Authors: Yatsalo B.I., Gritsyuk S.V., Didenko V.I., Mirzeabasov O.A.
Visitors: 16992
Land-use planning, environmental protection, and risk management require the use of up -to-date decision sup-port systems. Such systems are based on effective implementation of geographic information systems (GIS) to analyse and represent spatial data as well as on multicriteria decision analysis (MCDA) methods and tools. The paper describes DecernsMCDA decision support system. It includes different well-known and several original methods to analyse discrete multicriteria problems. The authors present a survey of MCDA software. There is a description of the DecernsMCDA struc-ture. Its difference from existing systems is pointed out. A brief description of multicriteria m odels included in DecernsMCDA is presented. It includes the methods for uncertainty analysis based on probabilistic approaches and fuzzy sets. The paper presents the references to the examples of DecernsMCDA practical application for solving multicriteria prob-lems related to land-use planning and risk management.

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