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scientific edition of Bauman MSTUSCIENCE & EDUCATIONBauman Moscow State Technical University. El № FS 77  48211. ISSN 19940408
# 05, May 2012
Machine Building and Engineering Science
Research of mineral oil bursting strength
# 05, May 2012 DOI: 10.7463/0512.0370692 The aim of this work is to research bursting strength of mineralbased oil designed to be used as a working liquid for hydraulic drives. Experimental setup on the basis of the mechanism consisting of a pneumaticdrive (pneumatic cylinder) and a vacuum pump (hydraulic cylinder) united by a common arm was created. The author proposes methods of hydrodynamic and burst vacuum extraction for removal of dissolved and undissolved air from the liquid. Quantitative estimation of bursting strength of mineral oil and the influence of degassing depth on it was given.
General approach to the estimation of quality parameters of product when renovating
# 05, May 2012 DOI: 10.7463/0512.0361862 The authors propose a generalized structural diagram of technological renovation processes of machine elements, based on the characteristic of transformation vicissitude of entry shell properties. The authors show the ways to provide the quality of renewable products, basing on the analysis of interrelation between the structural diagram elements, considering technological inheritance of renewable product properties. The concept “the inheritance of life cycle” was introduced and described.
Constructional Material Processing in Machine Building
Use of nuclear proton backscattering spectrometry for the study of anodic cementation of lowcarbon steels
# 05, May 2012 DOI: 10.7463/0512.0410498 The authors investigates the coating surface of lowcarbon steels after their carbon saturation at various parameters of anode electrolyte heating. Distribution of oxygen and carbon concentrations depending on the concentration of NH4Cl and temperature was defined by means of the nuclear proton backscattering spectrometry method.
Thermophysical properties of permeable elements based on porous net materials
# 05, May 2012 DOI: 10.7463/0512.0400624 The author revealed the influence of thermalphysic properties of porous net materials (PNM) on the formation mechanism of the joint produced by the fusion welding. The designs of getforming elements and plastic deformation in the PNM manufacture process have action upon anisotropy of efficient thermal conductivity. The method is presented to calculate the PNM efficient thermal conductivity and its anisotropy. Functional relationships are obtained to estimate technological process parameters providing the PNM production with prescribed thermalphysic properties. Experimental research of efficient thermal conductivity confirmed the adequacy of the obtained regularities; the research was performed both by the cylinder method and the plate method. The results of theoretical and experimental studies of thermalphysic properties are used for evaluation of energy input rate necessary for fusion welding of porous elements.
Power Machine Building, Metallurgical Machine Building and Chemical Engineering
Numerical simulation of flow parts of pump models and verification of simulation results by comparison of obtained values with experimental data.
# 05, May 2012 DOI: 10.7463/0512.0356070 The paper deals with the methodology and results of CFD simulation of the oil pump NM2500230 model. The dependences of the pump head and shaft torque on the pump flow were obtained by way of simulation. The results of numerical simulation were compared with experimental results subject to balance tests. Graphic illustrations of fluid flow in the flow part of the pump elements in different operation modes of the pump are presented in the article. The authors analyzed the error in the numerical experiment.
Transportation, Mining and Construction Machine Building
Estimation of stressstrain state of pin of rubber–metal swivel joint of caterpillar tracks during assembly and torsion
# 05, May 2012 DOI: 10.7463/0512.0405070 This paper presents an algorithm that allows to estimate the stressstrain state of the rubbermetallic pin of caterpillar tracks caused by mounting rubbermetallic pin in the holes of eyelets and subsequent loading torque. Algorithm was numerically implemented with the use of the finite element method. The distribution analysis of components of the stress tensor due to the assembly and torsion is included in the article.
Forecasting performance of curvilinear motion in multi wheeled vehicles for different allwheel steering laws
# 05, May 2012 DOI: 10.7463/0512.0403845 The article presents information about creating systems of allwheel steering (AWS) for different types of vehicles. The authors give a detailed description of the known laws of allwheel steering, and also present the original law obtained on the basis of theoretical and experimental studies. The authors present a mathematical model of a wheeled machine that predicted characteristics of curvilinear motion with different variants of steering system. The solution to the problem of evaluating the effectiveness of AWS laws was considered by the example of a vehicle with the 8 × 8 wheel forumla and 1234 steering. The technique of computational experiments, corresponding to the CMP field testing of vehicles, as well as the results of numerical simulations, is presented in the article. Basing on the analysis of data, they proved feasibility of the developed AWS law for vehicles of various types and purposes.
Investigative techniques for cushioning systems of transport vehicles
# 05, May 2012 DOI: 10.7463/0512.0376246 This paper describes the existing constructions of cushioning systems of transport vehicles. The main advantages and disadvantages of each system were identified; a modernized cushioning system on the basis of the existing cushioning system of TV with HMP was developed. A comparative study was carried out by means of simulation of soft riding of transport vehicles with existing and planned cushioning systems. Field tests were conducted for one of the existing systems. The authors analyzed adequacy of the model and drew conclusions regarding the most promising ways of upgrading existing cushioning systems. This work shows the direction of possible upgrading of existing systems and improving the accuracy of selection of elastic and damping characteristics of suspension.
Structure of energy consumption of walking machines with cycle propellers
# 05, May 2012 DOI: 10.7463/0512.0370775 The article gives an analysis of the structure of energy consumption connected with motion of walking machines of "heavy" weight category with cycle propellers. The analysis is based on the results of theoretical studies and field tests of a 5ton walking robot "Vosminog". The most significant components of energy consumption at different speeds were identified. It was shown that the speed of walking machines was significantly constrained with overgrowth of energy in order to overcome inertia forces.
Mathematics and Mathematical Modeling
On differentiation with respect to parameter of some functions
# 05, May 2012 DOI: 10.7463/0512.0398478 Investigation of arithmetic nature of values of generalized hypergeometric functions usually starts with applying a linear approximating form. Such a form must have a high order of zero at the coordinate basic origin and can be constructed by means of Dirichlet principle. The results obtained in this way are considerably general but the capabilities of such a method are restricted when precise quantitative assessment is required. Additional difficulties arise for functions with irrational parameters. In some cases the approximating form can be constructed effectively. Such a construction makes it possible to obtain more precise low estimates of linear forms for functions with rational parameters and to consider a case of irrational parameters. In this paper a new construction of Pade approximation for hypergeometric functions and their derivatives (also with respect to parameter) is proposed. This construction is applied for investigation of arithmetic properties of such functions.
Control of fourpropeller rotorcraft
# 05, May 2012 DOI: 10.7463/0512.0397373 The authors consider an aircraft with four propellers (fourpropeller rotorcraft). The propellers are attached to two bars rigidly fastened in the middle. The propellers on different bars are rotated in opposite directions. Changes of tractive forces of the propellers allows to control motion of the rotorcraft. The mathematical model of such an aircraft represents a dynamical system with a 12dimensional state and 4dimensional control. Dynamic feedback linearizing this system is constructed in the article. The feedback is used to track given reference trajectories with stability at the stages of takeoff and landing. Acceptability of the found control is verified. Results of numerical simulation demonstrate efficiency of the proposed approach.
Optimum thickness of screened wall with a feedback heatactivated padding
# 05, May 2012 DOI: 10.7463/0512.0396333 In this paper the authors define sufficient conditions for existence of optimal thickness of a flat isotropic wall with a heat insulator and an interlayer in the form of a heatactivated padding which operates on the principle of feedback providing a minimum steady hottestspot temperature of the wall. The unprotected side of the wall is cooled by the medium with a constant temperature and the heat transfer coefficient, and the side of the wall whith the heat insulator is affected by a heat flow in pulseperiodic mode.
Kinetic phenomena in media with microstructure as nonMarkov processes
# 05, May 2012 DOI: 10.7463/0512.0366037 The article presents a review of investigation of kinetic processes such as diffusion and thermal conduction in media with microstructure, near to the particles of micron and nanometer size, as well as microfilaments. The flow features of kinetic processes on small spatial and temporal scales are described. It was shown that these processes belong to the class of nonMarkov processes and require the use of integral transformations for their description.
Instrument Engineering, Metrology and InformationMeasuring Devices and Systems
Comparative estimation of air ion streams in the models of person’s upper respiratory tracts during airionic therapy.
# 05, May 2012 DOI: 10.7463/0512.0409303 In this paper numerical calculation of values of light negative air ion (LNAI) stream was carried out for a cylindrical geometrical model in the COMSOL Multiphysics 4.0. on the basis of the solution of the Fick equation. The relative error of a light negative air ion stream appearing with simplification of geometrical model of the upper respiratory tracts from a tore segment to the cylinder didn't exceed 5,3 %. Possibility of use of a cylindrical model of the upper respiratory tracts was proved by means of experimental studies of streams of the light negative air ions (LNAI) settling on walls of the upper respiratory tracts of an average person.
Neural network algorithms for classification problem of objects according to their acoustic radiation
# 05, May 2012 DOI: 10.7463/0512.0367620 For solving classification problems of air and ground targets the authors justify informative signal features and robust neural network algorithms of formation of decisionmaking areas; these algorithms use prior information on initial statistical characteristics of acoustic signals.
Informatics, Computer Science and Management
Modeling of geometric constraints in the process of decomposition of products into the assembly units
# 05, May 2012 DOI: 10.7463/0512.0415792 The problem of modeling the geometric constraints in the assembly of mechanical products is considered. This problem was reduced to a mathematical twoperson game on an ordered set. The result of the game is the correct col or of the partial order that it’s necessary to obtain for the minimum number of moves by decisionmaker. This paper presents a static characterization of the correct co l ored ordered sets. It was shown that any coloring of this kind could be reduced to isotone mappings of ordered set onto twoelement chain.
Review of filtration and segmentation methods for digital images
# 05, May 2012 DOI: 10.7463/0512.0411847 This article presents a review of approaches to filtration of digital images. Algorithms of linear, median and adaptive filters were simulated in order to filter pulse and white noises. Analyses of algorithms were carried out; the results of these algorithms application were also included in the article. Gradient operators and set of algorithms Canny for segmentation of digital images were simulated. Analyses of algorithms and results of implemented algorithms’ application for segmentation were carried out.
Synthesis of control in stochastic systems by generalized polynomial chaos
# 05, May 2012 DOI: 10.7463/0512.0410536 One of the main difficulties of analysis and synthesis of control in stochastic systems is the need of operation in multidimensional abstract spaces which are typically infinitedimensional and difficult to interpret physically. A method was proposed to solve the problem of synthesis of control in stochastic systems using generalized polynomial chaos. The method allows to transform the original problem with a stochastic model into a problem with a deterministic model of highdimensional state space of a dynamical system. This problem can be solved by known numerical methods.
Modeling of frequency and power characteristics of titanium dioxide memristor
# 05, May 2012 DOI: 10.7463/0512.0409216 The authors carried out numerical modeling of titanium dioxide memristor working frequency and power consumption. The model of memristor consists of two resistors connected in series; their resistance depends on the layers barrier between the oxygen layer and the TiO_{2} layer. For the first time the memristor power consumption at structural parameters dependences was analyzed. It was shown that significant increase of working frequency under the conditions of decrease of active layer thickness and total memristor thickness leads to the increase of memristor power consumption. The optimal values of active layer thickness and total memristor thickness were defined in this article, basing on the obtained data.
Mobile personal device information security problems
# 05, May 2012 DOI: 10.7463/0512.0404286 The paper describes the main types of threats to the mobile segment of the perspective military information infrastructure. The main principal approaches and technologies of mobile device security were analyzed.
Algorithms of decomposition of complex discrete device formal model
# 05, May 2012 DOI: 10.7463/0512.0369895 Modern CAD systems in mechanical engineering are increasingly used for design of microprocessor and robotic systems. The major component of modern CAD systems is creation of mathematical software for hierarchical cutthrough design of complex devices. Simulation of complex technical systems is a high dimension problem, so one of the methods of investigating such systems is the decomposition method that allows to break the studied diagram into parts by checking the correctness of functioning both as a single functional unit and as the whole complex device at large.
Quasigenetic algorithm for optimization of automated information systems structure
# 05, May 2012 DOI: 10.7463/0512.0369022 The proposed algorithm considers accumulated experience both of automated information system (AIS) designing and evolution modeling principles, in particular, simultaneous consideration of a few versions of AIS construction and their comparison. Ways of further improvement of the AIS structure were determined. The structure should match many criteria of optimality.
Analysis of approaches to formation of expert group membership focused on preparing and making decisions.
# 05, May 2012 DOI: 10.7463/0512.0360720 The article considers the analysis of existent approaches to formation of quantitative and qualitative membership of decisionmaking working group. The author presents a review of approaches focused on selection of quantitative membership of expert working group. Analytical expression allowing to determine boundary values of quantitative membership of expert working group was obtained by way of this review. Estimation of competence of both single expert and the whole group was considered and a set of overall indexes for competence estimation was proposed. The author gives recommendations on organization of expert groups producing coordinated, high technology and cost effective decisions.
Strategy of group query of sensors in monitoring networks
# 05, May 2012 DOI: 10.7463/0512.0351666 This article deals with the strategy of group query of sensors in wireless monitoring networks. The authors proposed a mathematical model of monitoring networks; construction algorithms of matrix query were obtained. The results of network numerical simulation in the case of changing of various parameters of the model are included in the article.
Mechanics
Concept of feedback coupling in dynamics of mechanical systems and dynamical damping of oscillations
# 05, May 2012 DOI: 10.7463/0512.0378353 The authors propose a methodical foundation of estimation and research of origination of dynamical damping of oscillations for tasks of vibration protection of machines and equipment. The novelty of the approach consists of using a new class of mathematical models for mechanical systems; these models represent structural schemes as the equivalent of dynamic systems of automatic control. The authors consider questions of scientific substantiation of structural transformations of mathematical models with selection of feedback couplings, inherent in elastic oscillation systems. A dynamical oscillation damper in the vibration protection system within the framework of the developing concept was considered as feedback of a certain type. The authors propose a technology of detection of dynamical damping of frequencies in systems with several degrees of freedom. The authors show possibilities of improvement of the “dynamical damping of oscillations” concept the physical meaning of which essentially depends on the choice of synthesis coordinates. The authors propose a synthesis method for building vibration protection systems with dynamical absorbers of oscillations. The numeric simulation and laboratory experiment results are included in the article.
Optics
Influence of the atmosphere on image quality in optical telescopes
# 05, May 2012 DOI: 10.7463/0512.0414002 The atmosphere is one of the basic factors worsening the quality of optical systems. The atmosphere as a medium for radiation propagation shows its distorting influence through the ability to absorb, to scatter, to refract (atmospheric refraction) this radiation, to change its properties continuously (atmospheric turbulence), and also, depending on the state of the atmosphere, to produce different electromagnetic effects (electrical breakdowns, ionization, etc). The author proposes a new approach to examination of the influence of the atmosphere on image quality. It was shown that this influence has geometric and threedimensional temporary special features. Recommendations regarding effective reduction of this influence are given.
Experimental studies of plasmachemical etching of glass when manufacturing diffraction and hologram optical elements
# 05, May 2012 DOI: 10.7463/0512.0408094 The authors consider capabilities of manufacturing diffraction and hologram optical elements (DOE and HOE) with the use of the “Caroline 15 PE” machine. The purpose of the work was to increase the quality of binary DOEHOE which is defined mainly by depth of the regular profile on the functional surface. It is shown that the maximum of this depth corresponds to the maximum of the etching selectivity of glass concerning a mask material. It is established that at thickness of chromic mask of 100 nanometers the PE method reaches depth of surface to 1,4 microns. It allows to increase the diffraction efficiency of DOEHOE. Relative intensity of light in the second order of diffraction is 30 %; it allows to create new products of microoptics.
Mathematical simulation of selectively radiating charges with high nonequilibrium
# 05, May 2012 DOI: 10.7463/0512.0364256 With the framework of multiliquid hydrodynamic approximation, the author proposes a computational model of nonequilibrium spaceinhomogeneous plasma of discharge in metallic vapor in the compound with inert gas which has different temperatures of light and heavy particles. All the functions of energy and state particle distribution were considered to be nonequilibrium and calculated in the course of evaluation. Beside collision processes in the kinetics of energy level population of plasmagenerating components, radiative excitation by resonant lines expanded with different mechanisms is taken into account. Theory and experimental data are in good agreement (515%) with temperature fields and electron and heavy plasma particle concentration, and also with basic radiative and electrophysical characteristics of discharges in the mercury vapor with argon buffer.
Metallurgical Engineering
Equipment for preparation of wire for welding the hardsurfacing overlay on titanium alloys
# 05, May 2012 DOI: 10.7463/0512.0398567 The authors analyzed the existent doping techniques for titanium filler wire with the usage of oxygen for welding deposition of hardwearing coatings onto the surface of titanium parts by means of nonconsumable electrode arc welding. Equipment for microarc oxidation of welding titanium alloy wire was developed; it allows to regulate oxygen content in the welding wire smoothly and, therefore, the deposited metal hardness along with automation of doping the wire with oxygen and the following welding deposition.
Antifriction surfacing of titanium alloys
# 05, May 2012 DOI: 10.7463/0512.0383721 The authors consider a method of improving antifriction properties of surfacing of titanium alloy parts. Technological operations of thermal and microarc oxidation methods aimed at surfacing the wire with stable oxide layer development are compared.
Transportation
Analysis of factors influencing the formation of supply chain subject to constrained logistic infrastructure
# 05, May 2012 DOI: 10.7463/0512.0400544 Decision making process regarding the structure of supply chain is influenced by a set of factors which can be conditionally classified as structural, commercial, operational and functional. The author describes the developed factor model which allows systems analysis of factors influencing the formation of supply chain. Special attention is paid to the factors which have became important only recently; they are factors connected with the type of transported goods and possibility of combining different transporting types in the supply chain. For estimation of these factors a multicriteria mathematical model was developed. This model allows to select an optimal supply chain variant considering the constrained infrastructure.
Economic Sciences
7748211/370880 Factor and cluster analysis of main performance indicators of industrial organization and transport system
# 05, May 2012 This article deals with development of formal methods and clusterization models of transport system organizations in the monitoring system for estimation of financial stability. The authors propose a combination of formal models of factor and cluster types. The factor analysis marks the main components, and the cluster analysis implements decomposition of the organization based on formal distinct features of main components.
Education Sciences
7748211/434860 Educational strategy for Research University as a synergy tool for educational and scientific domain of Russian Federation
# 05, May 2012 In this article author analyses the role of Research Universities in creation of unified educational and scientific domain of Russia, also the implementation of modern educational paradigm “life long learning”. Author emphasizes that problem of continuous education in postgraduate life period of a specialist, working in scientificindustrial companies, is not developed enough. Author proposes some directions of solving this problem.
7748211/370538 Goalsetting in Education
# 05, May 2012 Goalsetting is the most important stage of education process design and implementation. The authors analyze modern Russian and foreign structures of educational goals as well as the hierarchical classification (taxonomy). The authors note insufficiency of the number of educative (affective) goals in educational programs for students of technical universities.
Theory and Methodology of Professional Education (Higher Education)
7748211/400975 Objectdocumentary analysis as means of enhancement of students’ cognitive competence
# 05, May 2012 This article deals with the analysis of problems of modern technical education and search for a way out of the current situation. The objectdocumentary analysis was proposed for usage in the educational process as one of possible solutions. The possibility of applying this method in the educational process is proved; its efficiency in development and optimization of cognitive skills is shown.
Software
7748211/369475 Optimization of routes on road network
# 05, May 2012 The author proposes an algorithm of solving the problem of determination of optimal and all nearoptimal routes from one point to another. The problem was turned into determination of multiple paths between two nodes in the graph representing the city. A modification of the Dijkstra algorithm was proposed to solve the problem. The algorithm was implemented in JAVA as a software system. The calculations carried out by means of a program complex showed the efficiency of the algorithm when solving goodsized problems.
7748211/368573 Methods of digital signal processing of diaphragm type tactile sensors
# 05, May 2012 Nowadays, tactile sensors are widely used in robotics, biomedicine, construction activities and mechanical industry – everywhere, where it’s necessary to respond to physical contact. This article considers methods of digital signal processing of diaphragm type tactile sensors.
7748211/368628 Methods of Dummystructure optimal allocation
# 05, May 2012 The article deals with methods of dummystructure allocation on the patterns of topological layers of VLSIC, allowing to minimize the crystal surface remanent relief when creating multilayer metal coating. These methods are based both on simulation of chemicomechenical planarization operation (CMP) (MBDF) and usage of filling rules (RBDF). The authors present an algorithm of calculation of local density of VLSIC topological layer filling. This local density filling was used in the method of topology filling with dummyfigures based on simulation of CMP operation.
Appendix General Problems of Engineer Education
7748211/398498 Regarding the study of “Manufacturing technique of composite construction of rocketandspace machines” course
# 05, May 2012 The authors describe students’ acquisition of deep knowledge about structure, distinct features and trends of development of composite materials based on glass, aramid and carbonic fibers. Problems of modern design engineering and manufacturing of composite rocketandspace machines are also considered.
Foreign Education
Indian Panel Slams Efforts to Build New Elite Engineering and Science Schools
# 05, May 2012 The effort to open new Indian Institutes of Technology and Indian Institutes of Science Education and Research is faltering, says a Parliamentary committee that oversees the education ministry, reports The Times of India. With a faculty shortage as high as 60 percent at some of the new branches, in a report the committee has asked the ministry to ensure such gaps are closed quickly.
‘New York University’ Is Added to China’s List of Banned Internet Search Terms
# 05, May 2012 China’s Internet censors have added “New York University” to their list of blocked search terms, reports China Digital Times. Last week, NYU’s law school offered the blind civilrights lawyer Chen Guangcheng a visitingscholar position. Previously, Mr. Chen had taken refuge in the U.S. Embassy in Beijing after escaping from house arrest. China’s Ministry of Foreign Affairs accused American officials of interfering in China’s domestic affairs.
South Sudan Shuts Down All Private Universities
# 05, May 2012 South Sudan has ordered all private universities in the new country to close, saying they are not operating up to government standards, reports AllAfrica.com. The Ministry of Higher Education, Science, and Technology said the decision was the result of a study that looked at the qualifications of instructors and administrators and whether the institutions had sufficient number of lecture rooms and recreational facilities.
Stern School of Business in Shanghai
# 05, May 2012 NYU Stern is now taking applications for a new master’s degree in business analytics, which will start in May 2013. The curriculum will focus on data analysis and the use of modelling tools for business forecasting. Like many executive MBAs currently on the market, it will be modular, with 12 months’ worth of coursework spread out over two years, and inclass sessions supplemented by online learning.Also noteworthy is the location. While some classes will be in New York, some will be at NYU’s new campus in Shanghai; in fact, the businessanalytics students will the first to earn degrees at NYU Shanghai.
New EMBA Programme at Columbia Business School
# 05, May 2012 Columbia Business School is to launch a new executive MBA called EMBA – Americas. The 20month programme includes three semesters of core courses and two of electives. Most teaching will be delivered on Columbia's New York campus, with some also offered in California and Latin America. Applications for the programme open on July 1st; the first class will be in January 2013.
INDIA: Government Bans Use of Live Animals for Education and in Research
# 05, May 2012 The Union ministry of environment and forests (MoEF) has banned the use of live animals in dissection and other experiments in educational and research institutions. But scientists conducting new molecular research will be exempted from the ban.Based on the Prevention of Cruelty to Animals Act (1960), the MoEF has issued guidelines to the University Grants Commission, ministry of health and family welfare, Pharmacy Council of India and the Medical Council of India to discontinue dissection and experiments with live animals in universities, colleges, research institutes, hospitals, laboratories and instead use alternatives like computer simulation.



