Software & Systems

Articles of journal № 4 at 2013 year.

Order result by: Public date | Title | Authors |

21. The interpreter of descriptions of expert systems for psychological and physiological diagnostics [№4 за 2013 год]
Authors: Ермаков А.Е., Найденова К.А.
Visitors: 12259
The article describes the developed problem-oriented interpreter of expert systems descriptions, which is an integral part of the automated technology of creating expert systems for psychological and physiological diagnostics, providing practical use of these systems: maintaining an inspects database, diagnostic procedures implementation, on-screen display requests to the user with diagnostic tools and information messages, step-by-step data processing, control of the survey course, diagnostic conclusion output, the displaying survey results on the monitor screen and printing device in tabular and graphical form as well as their storage and view in the database. The descriptions interpreter also allows implementing diagnostic-training systems for trainings of students and young professionals. Functioning of the descriptions interpreter is based on the proposed formalized model of solved diagnostic tasks and the complex of diagnostic conclusion output models. The article describes the automated technology of creating expert systems of psychological and physiological diagnostics, characterizes this class of expert systems, describes the computational procedures and operations supported by the descriptions interpreter, the varieties of used diagnostic conclusions inference rules. The article also describes the concept of creating the descriptions interpreter, its basic functionalities and the structure at the functional subsystems level. The article discusses the software implementation features of the descriptions interpreter developed in the Microsoft Visual Basic 6.0 Service Pack 6 programming language and intended for working in Windows XP operating system.

22. Computing cluster upgrade for simultaneous execution of Linux and MS Windows OS [№4 за 2013 год]
Authors: Ermakov D.G., Берсенев А.Ю.
Visitors: 11014
The task of upgrading the software of a massively parallel supercomputer for the simultaneous execution of two different operating systems (Linux and Microsoft Windows HPC Server) at the same hardware cluster, each of them at its own node set (logical cluster) is completed. The process of installing Microsoft Windows and HPC Pack tools on cluster nodes using two DHCP servers is described. One of the features of the proposed solution is the absence of the Infiniband (Application Network) connection at the headend under Linux, which makes it necessary to use two DHCP servers. The problems revealed in the course of installing the Windows HPC Server and the Russian interface package are mentioned. The following approaches to organizing the choice of an operating system loaded to the cluster nodes are considered: the choice of the loaded system by an operator, alternation, creation of a common boot sector and choice of the loaded operating system by recording a file on this disk, and network loading with the choice of the operating system by a DHCP server. The latter approach is proved to be to most appropriate, some peculiarities of its implementation are described. The scripts that control the node switching and their functions are listed. It is mentioned that the main scripts are executed at the Linux headend. The access to these scripts from the Windows headend is provided by extending PowerShell tools by means of the SSH cmdlet set from PowerShell that uses the SSH.NET library. The proposed solution provides a quick switching of nodes between the Linux and Windows logical clusters.

23. Technology of technical level automated examination for helicopter night vision goggles [№4 за 2013 год]
Authors: Есев А.А., Ткачук А.В.
Visitors: 8073
The article describes methodical support for automated examination of technical level of helicopter night vision goggles that allow quantitative assessment of any technicality, to provide a comparison of technical levels of different models of night vision goggles and to assess their tests readiness in a helicopter. Technical level estimation is based on qualimetric approach: quality factors of simple, complicated and complex properties are determined by calculation, the properties weighting coefficients and the individual quality factors of simple (qualitative) technical properties are determined by expert way. An estimate of the technical level is determined recursively using technical properties tree. The resulting solutions provide the proposals reasoning to improve technical properties of the night-vision goggles, The properties (characteristics) that need to be improved (simple properties of the low-quality factors in the first place) are determined and measures (layout, design, etc.) to improve these properties are developed. An implementation of sound measures for the improvement of helicopter night vision goggles allow reduction in the number of accidents, as well as the prerequisites for them when helicopters flying at night and the crew using night vision goggles.

24. Cae technology of vertical continuous nonferrous feedstock casting [№4 за 2013 год]
Authors: Zhiganov N.K., Fomina, E.E., Вольнов И.Н.
Visitors: 6913
Vertical continuous casting is one of the main technologies of manufacturing nonferrous metal and their alloy products. Understanding physical phenomena of casting, cooling and crystallizing processes is the key condition of technological development. Casting process designers deal with CAE systems to research physical phenomena during metal casting and crystallizing and to optimize process-dependent parameters. Such systems at the development stage can replace a physical model experiment with a computing experiment to save time and material resources. The article describes a CAE system for modelling vertical continuous and discrete-continuous casting of nonferrous metal and alloy cylindrical feedstock, optimizing process-dependent parameters and visualizing crystal growth process. The first section of the article reviews casting packets developed to date and investigates the scope of their application. The second section describes a CAE casting process flow diagram and details system modules – a data input module, a mesh generation module, a thermal process calculation module, an optimization module, a microporosity module, a chemical component distribution module and a crystallization module. The results of computing experiments conducted with the system developed and researching the influence of technological parameters on the cooling and casting channelling processes are presented.

25. The choice of decision-making criterions in the organizational and technical systems using information situations [№4 за 2013 год]
Author: Zavgorodniy V.N.
Visitors: 9890
The article considers the class of competing organizational and technical systems, their operation is based on extensive using of technical means and is in interaction with the environment. Controlled object interacts with the environment when fulfill the set tasks. This environment is interpreted in as an "enemy" and "nature". Uncertainty of knowing factors, conditions and laws of the interaction of the controlled object (subject) with the environment for command and control part (the decision maker) is generalized as a set of informative situations. Fragmentation of informative situations into classes depends on the uncertainty degree of information available for a decision maker when making decision. The article proposes an approach to the choice of mathematical criteria to estimate the effectiveness of competing organizational and technical systems which is based on the classification of informative situations. Such approach may be useful when developing decision support systems.

26. Multiagent systems verification with markov chains: probability estimation of optimal solution finding by agents [№4 за 2013 год]
Author: Зайцев И.Д.
Visitors: 10473
The paper presents general description of meta-algorithm, used by some class of multiagent systems. Nowadays multiagent approach for complex systems building gains more and more popularity. But the theory, connected with it, still remains not developed enough. It’s still unclear or not well-founded, which kind of systems should be used in particular cases, and what advantages these systems have. Partly it’s because multiagent systems may have different meanings in different research areas. In this work one particular class of multiagent systems is considered. Formalization of this class is connected with Markov chains, so we can estimate some properties of these systems using that mathematical instrument. Then, for systems built with some functions, statement is proved that probability of finding allowable solution by agent is higher when fitness function meaning for this solution is higher.

27. Architecture of intelligent information support system for innovations in science and education [№4 за 2013 год]
Authors: Ivanov V.K., Palyukh B.V., A.N. Sotnikov
Visitors: 11125
The search for innovative solutions using different data sources is an important part of many lines of business, science and education. One of the main trends in the development of methodologies and solutions for search innovation is an automated semantic processing large volume of scientific and technical information that allows searching for breakthrough technologies and other innovative ideas. Obviously, there is a need in efficient methods of digital collections creating and filling with the latest ideas and technologies that contain not just their descriptions, but specially selected, classified and associated data. The development of new methods to search for ready-made solutions in the data center database is the essence of the Information Support System for Innovations in Science and Education. The article describes one of the approaches to finding information on innovations and its scope. The software common architecture and pilot components are presented. The relevant software architecture, including its functionality and behavior of the system during a given session is described. The object model for working with documents is presented. The document is any text object that is relevant to the subject matter of processing: query, search result, text document. There is information about the current state of the ongoing project.

28. Simulation exercise with operator errors control [№4 за 2013 год]
Authors: Кобзев В.В., Сизов Ю.Н., Скипидарников А.С., Шилов Д.К.
Visitors: 9727
The article offers the approach to automation of operator's error control when simulation training based on a model method. In this case the model is the algorithm written based on operating instructions. Deviations of an operator from the model are his errors to be minimized as a result of training. The following types of errors are considered: missing an operation, missing an operation considering its quality, relocation and adding operations. Detection of errors in serial and branching structures is shown in the article. The branching structures are described using logic operations of comparison, functional checks operations and performance monitoring operations. Complex operation "Performance-Check" is considered as an example of brunching algorithm. Functional structure of training mode structure is presented. The issues are scrutinized considering a formation of model solution of training task and comparison of training process with model solution. Formation of model solution is performed by model solution editor that is a built-in utility of training task editor. In case the model solution is present in a current training task, it is offered to form automatic evaluation of task fulfillment by comparing actual training process with this solution. General evaluation of task fulfillment, determined by evaluation of single actions, is formed according to the worst of existing partial estimates, taking into account total limit of time allotted for fulfillment of training task.

29. Using decision making theory for appraisement problems according to the CMMI model [№4 за 2013 год]
Authors: G.I. Kozhomberdieva, M.I. Garina , D.P. Burakov
Visitors: 12436
The article is devoted to the methodological approaches to the maturity appraisement of the software development processes according to the CMMI® model developed by the Software Engineering Institute (SEI) at Carnegie Mellon University. The article proposes and discusses the methods of quality appraisement of objective evidence and extent of implementation of practices that ensure achievement of the goals of the CMMI® process areas. Such appraisals are necessary to understand the processes maturity level of the developer. In case of uncertainty and/or information incompleteness on the implementation of CMMI® practices, it is reasonable to use a toolkit used for decision-making in weakly formalized subject domains. It helps to increase confidence in appraisal team solutions. This article considers two approaches to appraisals formation: fuzzy logic methods and multi-criteria classification methods (using the classes with fuzzy boundaries and the decision rules) with the possibility of their combining depending on the completeness of information available for the appraisal team.

30. On an approach to estimation of video-graphical information processing quality [№4 за 2013 год]
Author: Koltsov P.P.
Visitors: 13528
The paper describes the ideology of universal performance evaluation of computer programs. It is developed in SRISS RAS and implements one or another method of solving a problem of video-graphical information processing. It enables comparing programs effectiveness on a consistent basis to choose the most appropriate for use. The stated approach will allow developers of practical systems for video-graphical information processing to chose reasonably one or another software implementation to achieve the developer's task at the stage of the system's design. There are examples of the approach application for a comparative estimation of widely used computer implementations of solving tasks: edge detection, restoration, the boundaries clarifying, segmentation and texture analysis. Their stability for affine transformations is also investigated. External conditions were simulated by noising and a blurring of standardized set of reference images. The statistical and fuzzy measures, Euclidean and Hausdorff metrics are considered as universal performance evaluation. The given examples have allowed revealing the special features of the reviewed computer implementations and get their preferred application fields.

◄ ← Preview | 1 | 2 | 3 | 4 | 5 | 6 | Next → ►