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scientific edition of Bauman MSTU

SCIENCE & EDUCATION

Bauman Moscow State Technical University.   El № FS 77 - 48211.   ISSN 1994-0408

Informatics, Computer Science and Management

77-30569/342072 Page frame reclaiming method with scanning access detection
# 04, April 2012
V.N. Semenov, V.A. Krishchenko
The authors describe problems with the current LRU-based page reclaiming algorithm used by Linux kernel that arise in the case of a regular memory access pattern. Basing on the results of some preliminary experiments, a pattern detection method is proposed. The method uses page fault history as an input. The developed reclaiming algorithm and its implementation for Linux kernel are described. Experiment results with the method software implementation of this algorithm are presented.
77-30569/342044 Selection of state distribution function at the parallel test of the model
# 03, March 2012
I.A. Korotkov, V.A. Krishchenko
During testing finite discrete models to avoid constraints of available memory, parallel generation and distributed storage of state space can be used. The efficiency of such an approach depends on the choice of the state distribution function between computational nodes. The article considers the choice of this function, which allowed reducing the validation time at the expense of the number of removed callings between the nodes. The experiment results obtained with the help of the prototype of the tool for model validation are included in the article.  
77-30569/341367 Equations of sensitivity for the pulse system of cable insulation thickness stabilization with auxiliary adjustable variable at parametric discrepancy
# 03, March 2012
N.N. Kucyi, E.A. Osipova
Equations of sensitivity with respect to parameters of the controlled object were obtained. They allowed forming an automatic parameter optimization algorithm for the integral pulse-duration modulation system with two circuits at parametric discrepancy of a real object and its model. The pulse system of cable insulation thickness stabilization with an auxiliary controlled variable is considered.
77-30569/342083 IP packet processing monitoring in Linux
# 04, April 2012
A.O. Kryuchkov, V.A. Krishchenko
The paper discusses a method of retrieving detailed information on IP packet processing in Linux operating system. Modifications to Linux networking subsystem source code are described, along with the architecture of a monitoring tool based on the method being discussed. An example of the monitoring tool output is provided.  Possible applications of the method include troubleshooting and studying computer networks.
77-30569/340957 Performance analysis of bilateral filtering algorithms
# 02, February 2012
T.V. Krapchatova, M.V. Filippov
Usage of bilateral filters for image smoothing allows of removing small-scale noises and details, and, at the same time, saving clearness of borders. The authors present the results of the comparative analysis for four well-known algorithms of bilateral filtering and give recommendations for their usage for image digital processing.
77-30569/341035 Nonlinear model of market sector of macroeconomic control system
# 02, February 2012
S.L. Chernyshev
The model includes the production function modeling supply and the utility function modeling consumption. This resulted in the nonlinear dynamic equation of market price subject to the factors affecting the price.
77-30569/341170 The renovation process in Kalman-Bucy optimal filter
# 03, March 2012
S.L. Chernyshev
The author considers the renovation process in Kalman-Bucy optimal filter and proposes a solution of the differential equation for tracking error. It is shown that this solution includes normalized impulse characteristics. The expression for the renovation process correlation matrix is included in this article.
77-30569/339720 Recognition errors as a basis of implementation of computer arts mechanism
# 02, February 2012
V.E. Podol'skii, K.M. Grechischev, E.K. Pugachev
 In this paper the authors consider a new idea of implementation of computer art mechanisms on the basis of recognition errors by artificial neural networks. An approach using the mathematical theory of dynamical chaos to analyze the degree of originality in computer art image was also proposed in this article.
77-30569/340562 Method of fast restoration images blurred by motion
# 02, February 2012
E.E. Pеreslavceva, M.V. Filippov
Motion blur is a common defect that leads to blurry images with inevitable loss of information. If motion blur is shift-invariant it can be modeled as a convolution of a latent image with shift kernel, where the kernel describes the trace of the sensor. In that case removing the motion blur from an image becomes a deconvolution operation. The authors present a fast blind deconvolution method that produces a de-blurred image in only a few seconds. High speed of this method results from accelerating the steps of both kernel and latent image estimation in the iterative de-blurring process.
77-30569/339624 Distributed fault-tolerant DBMS
# 03, March 2012
D.N. Kovega, V.A. Krishchenko
The authors consider distributed fault-tolerant DBMS based on the Erlang runtime environment. As the result of testing, it was determined that the bundled software allowed achieving almost a linear growth of speed of query execution depending on the number of replication clusters. Recommendations on system deployment were produced.
77-30569/338840 About the way of measurement of temporal variations of Earth’s electric conductivity
# 03, March 2012
O.I. Miseyk
This author considers the design of a tuner of medium electric conductivity mounted in an anthropogenic impact zone. Correlations which allow determining the configuration of the position of primary transducer electrodes compensating the noise signal were obtained. A block scheme of the sensor which measures medium electric conductivity was proposed; compensation of signals of the noise field and the field of the undisturbed medium was implemented in the sensor.
77-30569/334177 Mathematical simulation of the explosive devices’ performance
# 02, February 2012
V.I. Kolpakov
Physico-mathematical statement of the problem of performance of explosive devices of different purposes, the fundamentals of numerical method for solving of this problem and description of algorithm for its implementation were considered in this article. Various examples of calculations were compared with experimental data; the possibilities of developed numerical technique were demonstrated.
77-30569/334010 Estimation of conditions of coordinated work of Autonomous Information and Control Systems (AICS) and executing device at the initial design stages
# 02, February 2012
N.S. Soboleva
Problems of coordinated work of Autonomous Information and Control Systems (AICS) and executing device (ED) for wide range of conditions of application were considered. Hodographs of relative velocities were plotted for possible variants of a meeting of the rocket and the target and possibility of their usage for a choice of AICS and ED parameters already at the initial design stages was shown. For export variant of complex system «Shtil-1» the field of hodograph of relative velocities where coordinated work of AICD and executing device could be provided, was defined.
77-30569/326903 Development of measurement system for aircraft based on algorithmic design approach
# 03, March 2012
K.A. Neusypin, A.V. Proletarskii, D.O. Sholohov
The problem of aircraft movement control with required accuracy at different segments of flight is usually solved with the usage of information from measurement system. The best structure of a measurement system was determined with the calculation and analysis of precision characteristics of measurement systems.
77-30569/325885 Training and certification of experts in industrial safety of nuclear, gas power plants and complexes based on computer technologies
# 02, February 2012
A.A. Barzov, G.A. Sarychev, L.G. Silant'eva, I.A. Tutnov
This article is devoted to the main provisions of the training and certification of experts working in the sphere of industrial safety expertize of various power systems, nuclear power plants, gas distribution networks and well storage fields. Proposals were made to improve the personnel training for industrial safety of expert and operating organizations of national fuel and energy complex of Russian Federation; these proposals were based on quality standards of personnel certification and prospect of wide application of computer databases, new mathematical software designed for automated personnel testing.
77-30569/325917 Enhancement of a flying vehicles’ efficiency using a resource redistribution approach
# 02, February 2012
M.V. Palkin
A problem of a flying vehicle’s efficiency enhancement by resource redistribution was defined. Approaches to the problem were suggested. Transfer of gyroscopic roll sensor’s functions to the optical image receiver was described as an example of such problems. Methods of roll determination using optical images were presented. On the basis of morphological and syntactical analyses algorithms of information processing and roll evaluation were developed. As the result of mathematical and seminatural simulation accuracy and reliability of algorithms (in comparison with gyroscopes) was estimated. Recommendations for application of methods and algorithms were given.
77-30569/324435 Synthesis of optimal education trajectories
# 01, January 2012
N.K. Sokolov
Theoretical part of this article was devoted to the important problem solving that is the development of methods and algorithms of creating of the adaptive environment for the development of educative resources. Application-oriented part of this article was devoted to the implementation of proposed methods and algorithms in particular teaching system. The aim of this work was the development of methods and algorithms of synthesis of optimal education trajectories along with the implementation of proposed methods and algorithms in teaching system.
77-30569/324631 Theoretically-lattice model of machine and mechanical device decomposition
# 02, February 2012
A.N. Bojko
The theoretically-lattice model of product decomposition was discussed in this article; it allowed to synthesize all structurally implemented three-level schemes of machine and mechanical appliance decomposition. It was shown that the property of an independent assembly, that any candidate for the assembly unit should have, could be described as the effect of a closure operator defined on the Boolean set of parts. This set of all closed subsets was a Boolean sublattice and the scheme of decomposition could be described as a set of residue classes of top congruence relation.
77-30569/309596 Vibration-based diagnostics of elsactic model of a spacecraft.
# 02, February 2012
A.V. Sen'kin
The results of EMS development in the form of Euler dynamic equations with variable matrix of inertia tensor for analytical and experimental investigation of EMS dynamics with distinct resonating characteristics were presented in the article. Continuous model is likely suitable for large spacecrafts. Considered methods of vibration-based diagnostics are based on the suggestion that model or enumeration of models of diagnosable subject is known. The goal of diagnostics is the determination of this model’s parameters.
77-30569/308732 Fuzzy interpolation
# 02, February 2012
N.P. Demenkov, I.A. Mochalov
The general provisions of the fuzzy interpolation were considered for the case when the values of the grid functions were defined as fuzzy numbers. Attention was paid to Newton's interpolation, where fuzzy power polynomial was used to reach the same goals. The existence conditions of strong, weak fuzzy Newtonian interpolation and its absence were given. Examples were given for the case when the power polynomial was the first-degree polynomial used for fuzzy interpolation of two fuzzy numbers. Spline interpolation is usually used to eliminate the edge effect at the end of the specified period. So the task of obtaining spline from fuzzy data and analysis of this data for the type of spline (strong, weak or lack of a fuzzy spline) is very important.
 
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