Software & Systems

Articles of journal № 2 at 2013 year.

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51. Code refactoring. Basic approaches [№2 за 2013 год]
Authors: Kalabin, A.L., Грязнов Е.Н.
Visitors: 12983
The paper substantiates the code refactoring application during the iterative software development lifecycle. The code refactoring principles and motives are described to show its advantages including improving code readability and reducing complexity. The most common and important refactoring techniques are used to improve the source code of the software package for mathematical modeling of the forming fibers. The results of the code refactoring are reviewed at the end of the paper.

52. Educational testing synthesis system based on formal grammar [№2 за 2013 год]
Authors: A.N. Shvetsov, Мамадкулов Ю.О., Сорокин С.И.
Visitors: 12183
The article considers the method of generating training tests and test tasks using production formalism based on the canonical Post calculations. There are following Chomsky classification grammars: context-free, context-sensitive and arbitrary grammar. The description of grammar rules are in traditional notation Backus–Naur Form. Syntax extending allows using multimedia objects (images, audio and video files), calculated formula (sine, cosine, multiplication, division, etc.) and text formatting. Different types of tests creation is possible. Tests export is supported in a variety of formats: RTF, HTML, SSI, BIN. There are printed formats and executable formats in training systems. Synthesis system supports multi -threaded generation and convenient grammar editor. This system allows providing trainings with formal grammars studying.

53. Trainer creation for radio-technical troops subdivisions [№2 за 2013 год]
Authors: Arepin Yu.I., Момот Н.Б., Долгий В.А., Коваленко А.И.
Visitors: 10860
Simulators are the basis of current combat training for combat units of technical troops subdivisions. These simulators are represented by automation facilities sets and inbuilt software and hardware complexes in relevant radar station. Consequently investment of trainings is high because of the need to activate relevant prototypes of weapons and military equipment while carrying. Besides, carrying of complex trainings on inbuilt simulators is rather difficult. So self-contained simulator creation for technical troops subdivisions is relevant objective. A simulator (in simulated situation) must be in compliance with military equipment prototypes. This article describes a structure and general capabilities of a self-contained simulator «Test» created by R&D Institute «Centrprogrammsystem» (Tver) for technical troops subdivisions. The simulator «Test» provides carrying out of all types of trainings (individual, independent, complex) for combat units of radar-location and radio-technical squadrons fitted with modern digital radar stations. As for structure, the simulator is made as local area network which consists of server, automated working station (AWS) of education chief, automated training working station of radar operator and automated training working station of automa-tion facilities set operators. The AWS of education chief helps to imitate functions which provide educational trainings prepa-ration, training process control, training performance measurement, trainee scorecards maintenance and gradebook mainte-nance. Other AWS in the simulator structure imitate work principles and information models that are in compliance with princi-ples and models of real issue type. It simplifies the transition from a simulator to military equipment. The simulator «Test» has gone through official test and is recommended to batch series line production.

54. Technology creation for managers data support systems development when shipboard damage control [№2 за 2013 год]
Author: Москаленко В.А.
Visitors: 11767
The article shows the analysis of tasks and problems for a developer when developing IT for shipboard damage control using modern requirements. Practical implementation of IT starts with mathematical support creating, modeling, forming data warehouse for intermediate data and decisions. The article describes the creation order of IT and determines the tentative solution. It includes: data capture, examination and analysis in data support systems, emergency situations localization; task definition, formulation requirements for infoware, mathematical support and software, decisions work out for hardware of decision maker data support system.

55. Methods of solving the problem of access to service files under the conditions of mandatory access control [№2 за 2013 год]
Author: Efimov A.Yu.
Visitors: 8739
The article describes the problems of dealing with service data in a protected software environment with work-ing mandatory access control. The main causes of these problems are described. The article considers typical application op-erating scenarios that use service data when it is storing in files. It includes dealing with configuration files and history rec-ord. Conflicts between these scenarios with mandatory access control are identified. Access methods to service files resolving these conflicts are classified and described. These methods are based on the addition of Bell–LaPadula model and on con-trolled resources virtualization. Comparative analysis of these methods is performed in the context of usability and security. Selection criteria of suitable access method to service files for variety of application conditions are proposed, selection algo-rithm when using multiple criteria is described. An example of using the criteria and algorithm is given.

56. Comparison of different wavelets efficiency for electroencephalogram analysis [№2 за 2013 год]
Authors: Turovskiy Ya.A., Kurgalin S.D., Максимов А.В., Семёнов А.Г.
Visitors: 11838
The article provides a comparative evaluation of WAVE and Morlet wavelets application in continuous wave-let transformation of medical and biological signals. Using Morlet wavelet application in real time processing the EEG data is difficult. That is why the possibility of replacing it with the WAVE wavelet without significant loss of information content of the coefficients matrix of the wavelet transformation was analyzed. The article proves the replaceability of the Morlet-wavelet with the Wave-wavelet in EEG processing. From henceforth the construction of matrix local maximums W2(a, b) string (LMS) forming EEG is possible. Under some conditions associated with registered signal duration and LMS drift in frequency domain, this replaceability is possible. In case of LMS analyzing in time domain and researching LMS drift in fre-quency domain with high resolution, the substitution is incorrect. It limits using Morlet-wavelet in real-time systems for EEG analysis.

57. Visual programming environment for parallel software development of image and signal processing [№2 за 2013 год]
Authors: Герценбергер К.В., Дюмин А.А., Sorokoumov P.S.
Visitors: 10883
The article describes the problems of present programming environment for parallel software development. The methodology of automated parallel software development is formalized in short. According to suggested methodolo-gy visual programming environment is developed to create parallel software of image and signal processing. Its advantages and disadvantages are noted. Core modules of visual environment and their relationships are described, the main steps of software development for multiprocessing architecture are considered in detail. The article gives a detail account of the key subsystems automating parallel programming in visual development environment. Created visual programming environment has been used on a number of large projects, the implementation certificate was obtained. This article shows the practical use of visual programming environment on developing parallel hardware-software system for verification of circuit boards’ images.

58. Precedent prototyping tools in design of computer-aided systems [№2 за 2013 год]
Authors: Маклаев В.А., Соснин П.И., Святов К.В.
Visitors: 10937
The article describes the prototyping tools of the design decisions which are presented as precedent models. The components of these models are focused on experimenting with decisions. An integrated model is proposed for imagining the precedents. It consists of the group of special purpose models. Modeling process is implemented during producing and checking of the design decision. As a result, it leads to a need for an operative binding of decision components to its pro-totype. The pseudo code programming software and interface binding, which also is implemented by using of pseudo code programming tools are proposed in order to present decisions elements and their assembly to prototypes. Model-driven de-sign mechanisms and interface metrics library are used for development of interface assembly. Prototyping tools are imple-mented as a part of tools modeling environment that services concept design of complex computer-aided systems.

59. Tactical chracteristics of weapons and military equipment samples life cycle costing [№2 за 2013 год]
Authors: Arepin Yu.I., Dopira R.V., Зосиев В.В.
Visitors: 12570
The article describes methodological approaches to military products life cycle costing and the variant of graphical decision support when managing the creation of complex engineering systems based on B-splines. The experience of development planning of weapons and military equipment determines the cost forecasting methods. They can be used de-pending on basic data structure. The specific feature of these methods is forecast accuracy. It affects their applicability in certain cases when determining the cost of test piece.

60. Aircraft system tactical simulator of Navy naval aviation [№2 за 2013 год]
Author: Sikorsky S.T.
Visitors: 11331
Flight crew training on flight simulators is essential in ensuring the safe operation of aircraft and helicopters, and in the effective implementation of their tasks. Aviation simulators in military are particularly valuable because they allow simulate real combat situation virtually with no limits. It is very difficult to simulate in peace during the exercise. The paper describes general theoretical questions and development issues regarding aircraft system tactical simulator of naval aviation. These simulators are designed for flight crew tactical training and the application of aircraft systems independently and in coordination with other forces in a united information-modeling environment. The possible structural schemes of tactical simulators construction for similar and different types of aircraft systems.

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