Software & Systems

Journal articles №3 2015

11. Neural network approach to evaluate a characteristic exponent of Levy process on Bandorff-Nilsen distribution example [№3 за 2015 год]
Authors: Belyavsky G.I. (gbelyavski@sfedu.ru) - Scientific Reseach Institute of Mechanics and Applied Mathematics Southern Federal University, Ph.D; Puchkov E.V. (puchkoff@i-intellect.ru) - Rostov State University of Civil Engineering, Ph.D; Lila V.B. (lila@i-intellect.ru) - Rostov State University of Civil Engineering, Ph.D;
Abstract: Application of the method of principal components and the generalized method of principal components to analyze data is not always reasonable, because the moments of necessary order don’t always exist in the analyzed distribution. At the same time, the interest in Levy processes continues to increase due to their numerous applications, but the principal component method is not applicable to the Levy process is. An important feature of the Levy process, which simplifies the analysis, is that the Levy process is completely defined by a complex-valued function of a real argument. It is a characteristic exponent. To identify the Levy process is to find the estimate of the characteristic exponent in the training set. The property of independence and homogeneity of Levy process increments allows using the increment of the process as a learning sample. The article considers the problem of building a neural network model for estimation of the characteristic exponent at a given interval of the argument. To estimate the characteristic exponent of the Levy process the authors propose the stochastic analogue of the adaptive neural network learning algorithm that uses the potential functions of Lanczos. The learning algorithm is tested on a hyperbolic Bandorff-Nilsen distribution. The hyperbolic distribution is a mix of normal laws, which allows generating a training sample with little effort. As a result the neural network has calculated an estimation of the Levy process characteristic exponent with a satisfactory degree of accuracy.
Keywords: giperbolichskoe distribution bandorffa-nielsen, characteristic components, Levy process, adaptive algorithm, neural network
Visitors: 7837

12. Automation of complex systems simulation modeling in a distributed computing environment [№3 за 2015 год]
Authors: Feoktistov A.G. (agf@icc.ru) - Matrosov Institute for System Dynamics and Control Theory of Siberian Branch of Russian Academy of Sciences; Basharina O.Yu. (basharinaolga@mail.ru) - Irkutsk state university, Ph.D;
Abstract: One of the most effective approaches to the analysis of complex systems is simulation modeling. The process of building simulation program, which adequately reflects the object of study, is a non-trivial task and requires high mathematical and programming skills from its developer, especially when it comes to a parallel or distributed program. Thus, there is a need for high-level tools for automation of this process, that will maximize the potential of high-performance IT-equipment and provide building a complex technological chain: from task formulation to model creation, then to software development and to carrying out a computational experiment. The article considers new software tools of complex system modeling based on the use of distributed computing environment. The authors represent the technology of software tools implementing to solve the research tasks of complex systems. Modeling is carried out using multiversion distributive calculations that allow reducing the time for task solution. As an example of distributive computing environment the authors take computer clusters based on the personal computers from educational and scientific establishments. The article represents the examples of software tools implementation in the process of important practical tasks solution. The principles of work, the technology of application, means and ways of implementing the above mentioned instruments provide the wide range of using their functional possibilities for complex systems simulation modeling in different fields of human activity.
Keywords: distributed computing environment, toolkit, simulation modeling automation, complex system
Visitors: 8218

13. Optimization for the detection process of new space object orbits by a parallel calculating of possible orbits [№3 за 2015 год]
Authors: Trushkova E.A. (katerinatr@mail.ru) - V.A. Trapeznikov Institute of Control Sciences of RAS, Ph.D; Matveev G.A. (gera@prime.botik.ru) - Program System Institute of RAS;
Abstract: Observation and cataloging of small debris objects in near–Earth space requires the improvement of the methods and algorithms for obtaining and processing information to improve the efficiency of the optical means. One of the approaches for operative detection of uncatalogued space debris objects orbits has been tested and used successfully in Russian optical observation ground facilities. However, much time is spent on the operation of the exhaustive search of short series of measurements (tracks) and the choice of three series separated in time, presumably belonging to the same object debris and used for the subsequent construction of a possible initial orbit. The article considers the issue of reducing tracks exhaustive search using preliminary analysis of the measurements by a priori constructing the boundaries of possible orbits parameters’ changes. Computational experiments within the research of this application problem are aimed at reducing the average processing speed of one track by increasing the accuracy of estimation. The processing speed of one track is naturally limited since the construction of the possible orbits parameter estimates for each track should not greatly affect the time of the overall measurement processing cycle as part of a trajectory measurements general processing program. The decrease in the average processing speed of one track and the simultaneous increasing the accuracy of estimates is possible with a parallel operation of the program. So, in order to optimize the program for detecting and determining the orbits of new space objects it is proposed to use a parallel algorithm for constructing the boundaries of the possible orbits changes for selection of allowable triples of tracks which have nonempty intersection. The algorithm is implemented in T++ for a T-system with an open architecture (OpenTS).
Keywords: с++parallel extension, t-system, opents, T++ programming language, dynamic parallelization, parallel algorithm, the initial orbit, near-Earth space, space debris
Visitors: 7400

14. Creation of automated control system for unmanned spaceflights in near-earth space [№3 за 2015 год]
Authors: Arepin Yu.I. (arep@cps.tver.ru) - RusBITech, Ph.D; Doronkina A.N. (annadoronkina@bk.ru) - Tver State University;
Abstract: Nowadays a creation of automated control systems for unmanned space missions in near-Earth space, for a spacecraft or a group of them is relevant. One of the central problems in the mission control is ballistic and navigation support, including setting targets, developing methods and algorithms to solve them, a complex of computational procedures, which are used later in the spacecraft flight control. One of the tasks of ballistic and navigation support is to determine the parameters of spacecraft motion in space (current and projected). Navigation gives you the ability to define and correct a space mission, to provide guidance, convergence, disorbit, etc. The analysis of the operation processes and the problems of creating automated control systems for mission control is impossible without a mathematical model or an aggregated set of components’ models, which reflect the properties of the modeling object. One of the main problems of spaceflights is a technical exploration of space, designed to strengthen the defense power of the Russian Federation and national security. Implementation of the pressing problems in this area for the Russian Federation is possible to base on the creation of spacecraft groups using highly elliptical orbits. In this regard, the article discusses the urgent task of building the satellite systems of continuous coverage of the Earth in highly elliptical orbits. This problem is reduced to finding the extremum of a function of a finite number of parameters, the function must have the meaning of a geocentric angular distance. The number of parameters is large, the criterion function is composite. To facilitate the analysis and simplify the calculations, the authors suggest the variants of problem dimension reduction, as well as the parameters of the operating effect of spaceflights automated control systems.
Keywords: continuous review of the Earth's surface, optimisation, satellite system, highly elliptical orbits, technical intelligence, mathematical model, ballistic and navigation support, spacecraft, automatized control system
Visitors: 10437

15. Estimation of advanced characteristics of airoplanes using cluster analysis [№3 за 2015 год]
Authors: Vestyak V.A. (kaf311@mai.ru) - Moscow Aviation Institute (National Research University, Ph.D; Malashkin A.V. (malashkin_a_v@mail.ru) - Moscow Institute of Electronics and Mathematics (National Research University, Higher School of Economics), Ph.D; Malashkin A.A. (malashkin.andrey@mail.ru) - Radio-Technical and Information Systems;
Abstract: The development of new types of light airplanes requires justification for passenger and weight-lifting capacities. The fundamental works [2] describe crucial problems of aircraft development for various purposes and methods of their solutions. The problems also concern the issues of general design of airplanes’ particular parts. The article pays attention to finding a solution for automation of the design objective: the effective algorithm of modified cluster data analysis for passenger air travel was developed and software-implemented. In short, based on the literature review, the authors explain the necessity of designing a local airplane with passenger capacity up to nineteen people. The development of an airplane for a specific airline operation takes into account the following parameters: transit range, the amount of passengers and weight of commercial cargo. In case of using cluster analysis classic approaches (K-means or K-medians with a finite number of clusters), in each cluster there will be airline operations exceeding aircraft capabilities with cluster specifications. Moreover, each airline operation represents a point in a three-dimensional space, each axis has a different dimension (kilometres, the amount of passengers, kilograms). Therefore, the problem of measuring the distance in this kind of a dimension arises: it is impossible to select the effective metric in such a dimension. That's why instead of the above-mentioned classic approach the authors used the original method of changing from three-dimensional to one-dimensional space for cluster analysis. It allows using a general Euclidean metric. The criteria of stopping the algorithm is offered and justified. The actual data of 1017 airline operations was processed. The acquired results can be used by aircraft designers and engineers working on aircraft concepts.
Keywords: data analysis, cluster analysis, cluster, airline operations, airplane design
Visitors: 8244

16. Objective methods of simulation modeling adequacy probabilistic assessment in information systems of ergatic radioelectronic facilities acquisition [№3 за 2015 год]
Authors: Potapov A.N. (potapov_il@mail.ru) - Military scholastic-scientific centre of the Air forces "Air forces academy named by prof. N.E. Zhukovsky and Yu.A. Gagarin", Ph.D; Abu-Abed, F.N. (aafares@mail.ru) - Tver State Technical University (Associate Professor, Dean), Ph.D; Martynov D.V. (idpo@tstu.tver.ru) - Tver State Technical University, Ph.D; Kordyukov R.Yu. (romkord@yandex.ru) - Main Department of scientific and research activities and technological support of the advanced technologies of the Ministry of defense of the Russian Federation, Ph.D;
Abstract: Based on the fact that modern simulators have a hierarchical (modular) structure of their analogue device, the authors have developed a method, which helps to determine the quantitative assessment of the simulation modeling adequacy in the simulator for each hierarchical level as its simulation results become closer to reality. This method eliminates the drawbacks of the method for assessing the simulator adequacy as a “black box”. This is its advantage. However, it has a disadvantage: forming distinct methodological errors. The errors appear during the decomposition of object’s functionals and model in Taylor series and limitations in the use of their members. It is obvious that this error can be detected by comparing the estimates of the adequacy, which are received using the first and the second methods. In the future, this identified methodological error can be taken into account when using confirmed functionals for new statistics. In this case, changes in the conditions of using radioelectronic facilities there is no need to obtain additional statistics. When upgrading individual subsystems of radioelectronic facilities, additional statistical data only from these subsystems is required. However, to ensure correct indication of the concomitant conflict feature in the process of testing and certification of simulators, it is advisable (if possible) to confirm it using the method of simulation modeling adequacy assessment in simulators by their information field.
Keywords: radio-electronic facilities, information systems, information systems adequacy assessment, simulation, probabilistic estimation
Visitors: 11285

17. Software for plastic cards personalization systems [№3 за 2015 год]
Authors: Zalozhnev A.Yu. (zalozhnev@yandex.ru) - V.A. Trapeznikov Institute of Control Sciences, Moscow; Financial University under the Government, Ph.D; Lomnev V.S. (lomnev@ostpack.ru) - Ostcard Ltd; Chistov D.V. (zavkit@mail.ru) - Financial University under the Government of the Russian Federation, Ph.D;
Abstract: Plastic cards (credit, debit, and others) are the keepers of personal information. The structure of information recording and the process of applying information on these cards is becoming more and more complex with time. Card personalization process involves the use of complex equipment, and hardware-software complexes. There is a variety of desktop equipment for personaliza-tion of small quantities of plastic cards. High performance machines and firmware complexes for high volumes of cards personaliza-tion are also produced. Card personalization can be controlled by software from different vendors. Various additional technological processes can be performed at the same time when personalization is being done. Different types of software are required to perform these operations. The article considers the software for plastic cards personalization systems including smart cards personalization systems, personalization center management software, software for card quality control systems, issued cards packaging and sorting management software, PIN envelopes personalization software. The paper contains a general description of work stages and interac-tion of processes associated with personalization of plastic cards. Particular attention is paid to the domestic import-substituting software. Where it is possible and appropriate, the article refers to relevant electronic resources, which can be accessed via the Inter-net.
Keywords: personalization center, personalization system, cards personalization, plastic cards, the software
Visitors: 9725

18. The software implementation of Fourier coefficients estimation with limited computational resources [№3 за 2015 год]
Authors: Prokhorov S.A. (sp.prokhorov@gmail.com) - Samara State Aerospace University, Ph.D; Kulikovskikh I.M. (kulikovskikh.i@gmail.com) - Samara State Aerospace University, Ph.D;
Abstract: Carrying out a scientific research in different areas requires huge amounts of computing power. Moreo-ver, computationally demanding tasks are assumed to have access to powerful servers and computing clusters and are expected to support handling big data sets. On the other hand, mobile devices have become increasingly powerful, that makes it possible to employ them in large-scale data processing, particularly, for volunteer computing like BOINC and Folding@home. Nevertheless, despite the advances in hardware, it is important to improve computational algorithms taking into account the following constraints which are determined by mobile devices characteristics: long response time, limited memory and battery life. The main purpose of this research is to create the algorithms to estimate Fourier coefficients according to these minimal requirements. To attain the aim, we employed connection coefficients method to work out specific relations for continuous Laguerre functions. In comparison with the corresponding recurrence re-lations, which entail an enormous computational cost, the proposed analytical relations require less computational re-sources to produce results (in particular, time and space). To support the theoretical results, we conducted a series of computational experiments using MATLAB Profiler. The findings of this research present the software implementa-tion of Fourier coefficients estimation to operate with limited computational resources and the results of the mobile application tested on a device. Based on these tests, we analysed the elapsed running time to process big data sets vary-ing the volume of data and the number of Fourier coefficients.
Keywords: big data sets, connection coefficients, laguerre functions, fourier coefficients, analytical- numerical methods, mobile devices, limited computational resources
Visitors: 6733

19. Masking privileges for existing android applications [№3 за 2015 год]
Authors: Khorev P.B. (pbkh@yandex.ru) - National Research University “MPEI”, Ph.D; Novik A.K. (aktelion@gmail.com) - National Research University “MPEI”;
Abstract: Android has robust system that prevents malware from damage to sensitive data and abusing system resources. The core element of that system is a permission subsystem, which allows restricting access to system resources and private data. Each application requests a permission for correct work and user gives it or cancel installation process. This article describes one of its drawbacks: it is impossible to set optional permissions. The paper also partially considers a modified Android permission subsystem, which allows more flexible approach to set application permissions. There is also a description of a way to integrate existing applications into the modified Android version without sacrificing of flexibility. The approach is based on mocking certain resource for a certain application. Thus, an application deals with a mock resource and can’t understand if this resource is mock or real. On the one hand, this approach allows an application to work with any resource like with a genuine one; on the other hand, it protects sensitive data from unauthorized access. This approach can be used in future Android OS versions to improve application permissions enforcement.
Keywords: mock resource, mocking permissions, android os optional permissions
Visitors: 4412

20. Use of the software for definition and forecasting of extruded production quality indicators [№3 за 2015 год]
Authors: Zubkova, T.M. (bars87@mail.ru) - Orenburg State University, Ph.D; Kolobov A.N. (KolobovAN@ya.ru) - Orenburg State University, Ph.D;
Abstract: The article describes the means of obtaining numerical values of grain quality parameters of extruded shredded wheat. Extruded production quality depends on grain durability and uniformity. The final product application range can greatly change quality requirements. Granule durability is estimated by a normal voltage impulse, blending and uniformity – by the shear stress impulse arising in the work materials during extruding process. Based on the mathematical model which describes the production technology, special software was developed. It allows calculating technical and economic data (productivity, efficiency, power, pressing time, force operating on working bodies, torque effect, as well as normal and shear stress impulses). Carryed out physical experiments helped to get numerical figures of grain durability, destructibility and an increase of granule volume due to certain kinematic, geometrical and design parameters of an extruder’s screw. A computing experiment with the developed software was carried out using the same parameters. Empirical dependences, which connect indicators of finished goods quality with impulses of normal and shear stress were obtained using the second software appli-cation. Special surface responses were created to improve visualization of the results. The responses graphically display du-rability, destructibility, volume increase in normal and shear stress impulses. Thus, it is possible to predict numerical criteria of finished goods quality making computing experiments (using the first software) and varying a wide data range. It allows creating extrusive equipment with set requirements and characteristics at the outline design stage.
Keywords: volume increase, strength, crumbleability, normal and shear stresses impulses, computing experiment, mathematical model, extrusion process
Visitors: 9080

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