Software & Systems

Articles of journal № 4 at 2013 year.

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51. Automated organization of personal job descriptions for desing organizations employees [№4 за 2013 год]
Authors: Соснин П.И., Святов К.В., Перцев А.А.
Visitors: 12124
The paper considers the processes for the collective development of complex automated systems (software intensive systems), and the competencies of a design organization and its members. The constructive management of organizational resources and design organization experience is very important. Its efficiency depends highly on professional experience and employee competency. A common form for the competency grouping is roles. Every role is linked not only to a group of competencies, but to an engineering tool set. Assignment of employees’ responsibilities needs job descriptions to be personalized and consolidated in the commitments. To make a system of personalized job descriptions, an ontological approach is used. This paper presents tools for automated creating of personalized job descriptions for employees of a design organization developing computer-aided systems (CAS). The implementation is focused on design processes that use experience base for information support.

52. Typologization of local maximums in electroencephalogram spectrums derived from continuous wavelet transformation [№4 за 2013 год]
Authors: Turovskiy Ya.A., Kurgalin S.D., Семёнов А.Г.
Visitors: 7495
The paper offers a method to obtain a functionally important information about brain work. It is based on the analysis of local maxima chains (LMC) on the set of the wavelet energy spectrum (scalogramm, local spectra) derived from a matrix of squares of the coefficients of the wavelet transformation of electroencephalogram (EEG) data.The method means averaging LMC in frequency space. The method uses two ways of averaging: by the first LMC timing coordinate, and by minimizing the differences between LMC. When using the first way, all chains are synchronized according to the first value which equals to zero scaling reading the timeline; in the second way chains move relatively to each other in order to minimize the differences between them, and only then averaging is run. The research have shown that for the EEG of a human at rest there are five basic types of LMC behavior: 1) the increasing one, characterized by increasing frequency of the local spectrum maxima in the chain, 2) the decreasing one, characterized by reducing frequency of local maxima in time, 3) the constant one, when the whole LMC frequency is not changing significantly, 4) ascending-descending, when the local maxima frequency in the chain first increases and then decreases, 5) the decreasing-increasing one which is opposite to the behavior of the 4th type. It is determined that the relation of the chain to a certain type is an individual property of a human and depends on the nature of the brain activity at the moment. The typology performed for the local maxima of the matrices of the wavelet coefficients for EEG is essential to study the EEG in different functional states of a human.

53. Elastic-plastic deformation processes simulated by the modified boundary element method [№4 за 2013 год]
Authors: Федотов В.П., Spevak L.F., Nefedova O.A.
Visitors: 11517
The paper presents a software package simulating two-dimensional processes of elastic-plastic deformation in structural components. The model is based on solving static problem of elasic-plastic deformation. The solution algorithm is based on a modified boundary element method. The solution of the nonlinear boundary value problem under consideration is iterative. The inhomogeneous linear boundary value problem of the theory of plasticity is solved at each iteration. The inhomogeneity is determined by the non-elastic deformation components and corresponding stresses calculated at the previous iteration. The applied algorithm of solving linear problems is highly efficient due to the accurate computation of integrals with the boundary element method using our analytical formulae. The algorithm involves parallelized computations at each solution stage. The proposed approach provides high-speed and accurate computations. The software package based on the algorithm allows calculating the stress-strain state with elastic-plastic deformation in statically loaded two-dimensional regions of any geometry. The package is implemented on the “Uran” supercomputer at the Institute of Mathematics and Mechanics, RAS (UB). It comprises not only a calculation module, but also a graphics editor to build computational domain and to input parameter and boundary conditions. The domain boundaries are specified by rectilinear and circular parts divided into boundary elements. The interior domain zone for calculating stresses and displacements is arbitrarily specified by a boundary consisting of rectilinear and circular portions. The computational grid frequency is also specified arbitrarily, and recalculation does not require a new problem solution. The problem of elastic-plastic deformation of a rectangular plate with a circular orifice is considered as an example. The calculation results are plotted.

54. Managment of aircraft equipment maintenance processes based on constraints satisfaction method [№4 за 2013 год]
Author: Fedotova А.V.
Visitors: 9959
One of the main objectives of integrated logistics support is reducing operating costs. The most predictable and controllable component of the total operation cost is the maintenance and repair of equipment. The main parameters that characterize the perfection of maintenance and repair system are the scope and frequency of maintenance operations. The article describes the incremental methods of works distribution of to maintenance scheduling complex systems, considers the problem statement of the equipment maintenance and the tasks to be solved by the method of constraint satisfaction. A classification of the constraints for the task is reviewed. The methods of constraint satisfaction, suitable for solving periodic maintenance processes scheduling is reviewed. The paper describes the domain ontology. The authors choose the methods and formulate the technique to solve the problem, it is based on a combination of search methods and preliminary restriction of search space. The algorithms of methods implementation are offered. The test results of the technique application are described.

55. Automatic continuous speech recognition system for the tatar language [№4 за 2013 год]
Authors: Хусаинов А.Ф., D.Sh. Sulejmanov
Visitors: 10454
The paper describes speech analysis system for the Tatar language. An approach to creating automatic phonetic transcription system for Tatar texts has been developed and implemented. This system is based on acoustic rules for the Tatar language. These acoustic rules have been converted to a formalized form using developed programming tool. The two levels analysis procedure has also been developed in order to create speech recognition algorithm, these levels are: acoustic (phonemes) level, linguistic (words) level. Phonemes level consists of acoustic models for 57 Tatar phonemes, each of this phonemes is represented by a hidden Markov model. To train each of specified statistical model 5 hours speech corpus has been recorded. Additionally, an algorithm to automatically create phoneme-level annotation of this corpus has been developed and applied. Finally, a Tatar speech recognition algorithm has been implemented based on developed programming tools and acoustic models. In total, the proposed system has shown 92% word recognition correctness in test speech subcorpus.

56. The methodology of constructing a consolidated reporting system [№4 за 2013 год]
Authors: Чибисов В.Н., Гаврилов В.Н.
Visitors: 12144
The article describes the issues of constructing and projecting consolidated reporting system. It defines main operations and functions which are necessary for data consolidation, and describes ways of data organization, data loading from external sources, means of data warehouse construction. The paper describes problems of data uploading from external sources and ways of their solutions. It discusses solutions of providing requests processing speed, data integrity and consistency, filtration and processing of data, which are loaded into the system. The article contains descriptions of aggregation and intergroup operations, their intention and features of implementation. It describes means of providing data processing results and ways of their implementation. It also gives recommendations how to organize construction of consolidated reporting system.

57. Building OLAP-cubes using standard web-development applications [№4 за 2013 год]
Authors: Чибисов В.Н., Суслов И.А., Маркилов И.А.
Visitors: 18625
This paper addresses building of a system working with multi-dimensional analytic spaces used to process analytical data (OLAP-data cubes) by means of shareware, free tools and software to develop web-applications. The paper considers the issues related to development of a database structure, the encoding system and the language used to address to the multi-dimensional space, as well as building and design of a translator converting the expressions written in the language used to address to the multi-dimensional space into the language used to make database queries (SQL data-query language). Application of the approach described in this paper allows designing and building OLAP-data cubes using conventional means for web-application development without using expensive, special-purpose software to work with multi-dimensional analytic spaces (OLAP-data cubes).

58. Using the remote access Matlab package to solve details taxonomy problems [№4 за 2013 год]
Author: Shestakov A.M.
Visitors: 10919
The paper shows the efficiency of the remote taxonomy via the Internet for details to be worked on metal-cutting equipment. For this purpose, a Web-based application had been developed using Matlab tools that is used for different mathematical problems, and Matlab Web Server (MWS) tool. Matlab Web Server enables Matlab applications working in the Internet, using the technology in the form of HTML-pages and forms. The Internet technology allows making applications developed in Matlab available on the Web. As a consequence, the user does not required to know how to use Matlab, as well as to install Matlab on a local computer. The user works with a network resource that is running the processes for Matlab. The technologist can use the information obtained as a result of Web-application work and make a decision to develop a single process for all the details of the same class. Final details classification is displayed graphically as the dots in space. Each dot represents a single detail. Same colour-grade dots, as well as the accumulation of points form a common workflow processing. Developed web application can be used to classificate details according to technologies via the Internet, and then to process them in modern engineering enterprises. Access to the web application can be divided into a number of users working simultaneously and independently.

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