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scientific edition of Bauman MSTUSCIENCE & EDUCATIONBauman Moscow State Technical University. El № FS 77  48211. ISSN 19940408
# 03, March 2014
Machine Building and Engineering Science
Features of energy impact on a billet material when cutting with outstripping plastic deformation
# 03, March 2014 DOI: 10.7463/0314.0700481 The paper considers interaction and mutual influence of two external mechanical energy sources used in cutting process with the outstripping plastic deformation (OPD). One of these sources provides preliminary deformation of material while another one removes a layer of material in the сhipping form. The paper presents an approximate physical model of the mechanism of preliminary hardening of material, which acts on technological efficiency of the cutting method with OPD. It presents the standard regularities of the method efficiency, which changes depending on the load rate of preliminary deformation of material and makes physical justification that the optimum values of such load are available when machining with OPD.
Modernization of technology to estimate composite constructional ceramics operational dynamic properties using a hydroabrasive ultrastream
# 03, March 2014 DOI: 10.7463/0314.0701307 The articles concerns the constructional ceramics (CC) diagnostics based on the aluminum oxide. Relevance of the article subject of is caused by the need to have in a technical arsenal of the technologist methods of expressdiagnostics, which can be applied at the stage of technological preparation of CC production. Their absence, today, considerably complicates the finetuning technology and prohibits from obtaining the latest information about operational dynamic properties of this material. The article presents the comparison results of the micromorpholodgy analysis of KK chips after static and dynamic influence. It analyses the obtained results and draws conclusions on a possibility to use an ultrajet diagnostics method at the stage of production in addition to tests using the solidstate drummers. The article gives justification for efficiency of ultrajet diagnostics methods, considers the prospects of its practical application in manufacturing products from KK.
Constructional Material Processing in Machine Building
Design and research of calculation models of the tooth profile angles of thread milling cutter with helical flutes
# 03, March 2014 DOI: 10.7463/0314.0702743 The paper presents a developed in CATIA V5 R17 software geometric model, allowing to determine the angles of the tooth profile of thread milling cutter with helical flutes. The model research has been conducted for geometric and design parameters of thread milling cutter, made of cemented carbide and high speed steel. It is established that available rake and clearance angles, and inclination angle of helical flutes at the accepted values of pitch and diameter of the tool lead to obtaining the angles of the tooth profile other than 30 degrees, thus requiring the calculation of angles β1 and β2 in each case of design. In the general case we have an asymmetrical profile with respect to the axis passing through the top of the tooth. The influence of geometrical and design parameters of the model on the values calculated angles is established.
Experimental Setup for Diamond Grinding Using Electrochemical InProcess Controlled Dressing (ECD) of Grinding Wheel
# 03, March 2014 DOI: 10.7463/0314.0699920 The paper considers basic methods and types to make dressing of diamond grinding wheels. It presents a classification of methods according to different criteria, analyses the positive and negative aspects of using the existing types of dressing and current trends in this area. The paper presents description both of Electrochemical InProcess Controlled Dressing (ECD) and of Electrolytic InProcess Dressing (ELID). Further, it describes the experimental setup for Electrochemical InProcess Controlled Dressing, its scheme, the model and the main process parameters. It also reveals a setup design technique, its application analysis, and describes parameters of ECDprocess control.
Transportation, Mining and Construction Machine Building
The development of structures and the prospects of automatic transmissions
# 03, March 2014 DOI: 10.7463/0314.0702931 The article describes the design of control systems for automobile transmission. It gives a classification and distinct characteristics of transmissions. Kinematic schemes of rotary shafts and planetary gearboxes of leading companies in the field of world automotive engineering are presented. The advantages of automated transmissions have been studied. The prospects of creating the control systems of transmissions based on artificial intelligence techniques are offered. The article is intended for specialists in the field of automation control of car transmissions.
Mathematics and Mathematical Modeling
Feynman formulae for evolution semigroups
# 03, March 2014 DOI: 10.7463/0314.0701581 The paper describes an approach to solve initial and initialboundary value problems for evolution equations. This approach is based on representation of solutions of such equations by limits of nfold iterated integrals when n tends to infinity (such representations are called Feynman formulae). These formulae allow to calculate solutions of evolution equations directly, are suitable for approximation of transition probabilities of stochastic processes, can be used for computer modeling of classical, quantum and stochastic dynamics. In the present note Feynman formulae are constructed both for evolution semigroups, obtained by additive and multiplicative perturbations of generators of some original semigroups, and for the CauchyDirichlet initialboundary value problem for a differential equation of parabolic type. In particular, the paper presents Feynman formulae for the Cauchy and the CauchyDirichlet problems for a second order parabolic equation with variable coefficients and for the Cauchy problem for Schrödinger equation.
Aeronautical and Rocket Space Engineering
Operation modes research of liquefied natural gas storages as a part of the ground complexes equipment
# 03, March 2014 DOI: 10.7463/0314.0700530 Equipment operation safety and ecology of the ground complexes is one of the defining factors to choose a component of the rocket fuel. The Liquefied Natural Gas (LNG) having a number of advantages over the rocket kerosene has a specific storage feature that is a possibility of the rollover phenomenon to be arisen. Now the Russian Federation has no sufficient experimental LNG base to simulate different processes, including a rollover. Basic data for modeling are taken from various sources to reveal a doubtful reliability. To confirm data compliance, modeling results have been compared to the experimental data.
Simulation methods of rocket fuel refrigerating with liquid nitrogen and intermediate heat carrier
# 03, March 2014 DOI: 10.7463/0314.0699941 Refrigerating of highboiling rocket fuel is needed to reduce its density and to create cold reserve for equalization of fuel heating during preparing and launching operations. Liquid nitrogen is cheap and ecologically clean product, which can be easily used as a source of cold in rocket fuel preparing systems. Refrigerating systems with liquid nitrogen injection, intermediate heat carrier and heat exchanger are used in temperature preparing of highboiling rocket fuel components with relatively high freezing point. The operation principle of such system is based on liquid nitrogen injection into heat carrier and refrigerating a rocket fuel component with recuperative heat exchanger. The paper considers simulation techniques and results of such a system performance.
Instrument Engineering, Metrology and InformationMeasuring Devices and Systems
Left ventricular assist device (lvad) design features: literature review
# 03, March 2014 DOI: 10.7463/0314.0705250 The mechanical heart support/replacement system  ventricular assist device (VAD) design task is considered in this article. Relevance of research in this area is due to high percentage of people suffering from heart diseases. The cause of every 5th death in the world is heart failure. Currently, a number of VAD models have been created some of which are successfully used in medical practice. Over years of research in this area the general concept of VAD development has been formed: requirements to systems have been established, approaches to the tasks solution have been developed, certain results have been received and existing lacks of VAD systems have been revealed. Rapidly developing technologies give more and more opportunities for solving the existing problems. This work presents an analysis of the problem of VAD systems development today. Biomedical and technical requirements to VAD systems are systematized, classification of the problems arising in the design process is carried out, finally, trends and new developments in this area are discussed.
Selecting an informative features vocabulary for recognition algorithms based on Fourierdescriptors
# 03, March 2014 DOI: 10.7463/0314.0699817 One of the most important and challenging tasks of constructing the effective recognition systems is to select a working dictionary containing the most informative features. The successful solution of this problem provides both a reduced dimensionality of the feature vector and an improved efficiency of the recognition system as a whole. The article concerns the problem of reducing the feature space in pattern recognition algorithms using the object contours and proposes a method for its solution based on the search of the most essential features. It follows from the experimental results that the proposed method enables to abridge substantially the dimension of features dictionary and improve the efficiency of pattern recognition algorithm using the object contours on the basis of Fourierdescriptors.
The obtaining of statistical characteristics of informative features of signals in the Autonomous information systems using neural networks
# 03, March 2014 DOI: 10.7463/0314.0699228 The article studies a neural network approach to obtain the statistical characteristics of the input vector signal and noise implementations at illconditioned matrices of correlation moments to solve the problems to select and reduce the vector dimensions of informative features at detection and recognition of signals and noise on the basis of regression methods. It considers a problem concerning the matrix condition of the correlation moment of informative signal features and a possibility to apply the neural networks in theoretical studies. Neural network algorithms are used to obtain the necessary statistical data for illconditioned matrices of correlation moments of informative features. It is shown that the weights obtained at training the neural network with no zero weights are the regression coefficients of the initial parameters of informative features input.
Research algorithm for synthesis of double conjugation optical systems in the Gauss region
# 03, March 2014 DOI: 10.7463/0314.0698970 The paper presents the research and development results concerning the universal algorithm for automated synthesis of centered optical systems of double conjugation in the paraxial region. The initial axial thicknesses for the initial scheme have been taken from the system designed by Hopkins. With a lack of appropriate solution the spacing is changed by some value. As a result of using the universal automated algorithm two different systems have been obtained. Both systems have two pairs of conjugate planes with changeable magnification. The kinematics of components movement has been calculated for both cases.
Informatics, Computer Science and Management
Feature analysis for closed queuing system with nonpreemptive priorities
# 03, March 2014 DOI: 10.7463/0314.0702664 This article deals with the method to determine average residence time, average waiting time and utilization in nodes of multiclass closed queuing system with nonpreemptive priorities and general distribution function of service time MrGIr1N. The method uses the embedded Markov’s chainbased design, which is linked to the regenerations points i.e. moments when the service time is over. The formula for unknown elements of transition matrix for this chain is proved. The solution for probability distribution of this chain is proved. The next step is to define the states probability of closed queuing system in a stationary mode on the basis of system of equations of global balance for such system. The formula to determine an average residence time, average waiting time and utilization of server facility is proved. Generally, the proposed method is very efficient.
A technique for choosing an option for SDH network upgrade
# 03, March 2014 DOI: 10.7463/0314.0702849 Due to sharp growth of information sources from time to time a demand arises to upgrade a network of the tributaries based on synchronous digital hierarchy (SDH) thereby increasing its capacity. At the heart of an offered upgrading technique lies the method of expert evaluations, and the developed software complex serves as the tool for obtaining characteristics of a network. The complex allows us to analyse rather large number of options, being unevident even for some technical specialists owing to rather large amount of works in a network for their introduction. Approbation of the technique and complex showed their efficiency.
A global optimization hybrid algorithm based on the algorithm of artificial immune system and swarm of particles
# 03, March 2014 DOI: 10.7463/0314.0700457 The paper proposes an AIS_PSO algorithm (Artificial Immune System_ Particle Swarm Optimization), which represents a modification of the hybrid algorithm based on the CLONALG immune algorithm and the algorithm of the particles of swarm (PSO). The modification is to replace the CLONALG algorithm with the same, but the modified algorithm. The AIS_PSO algorithm has been realized by MatLab software package. An efficiency of developed algorithm and software has been examined using Rosenbrock's, Himmelblau’s, and Rastrigin’s test functions. The AIS_PSO software allows a problem solution for the optimal control of vibration robot movement. The paper applies a known method to solve the problem of the optimal control of dynamic system based on reduction of this task to a task of nonlinear programming of high dimension. The study results have shown that a developed algorithm and software are high efficient.
Reduction of the reversible circuits gate complexity without using the equivalent replacement tables for the gate compositions
# 03, March 2014 DOI: 10.7463/0314.0699195 This paper studies the problem of reducing the gate complexity of the reversible circuits consisting of NOT and kCNOT gates without using replacement tables. Generalization of kCNOT gate is made for the case of zero value at some of the gate control inputs. For such generalized kCNOT gates the equivalent replacements for the reversible gates compositions are considered. The proof of correctness for such replacements is provided by comparing result transformations of the gate compositions before and after replacement. Application of the equivalent replacements for reduction of the gate complexity of the abstract reversible circuit is shown.
Mechanics
Accounting rigid support at the border in a mixed model the finite element method in problems of ice cover destruction
# 03, March 2014 DOI: 10.7463/0314.0700516 The task concerning the bend of the plates lying on the elastic basis, for a long time was of interest in engineering, mainly, in terms of calculation of base plates. Now similar researches are carried out to solve the problems of icebreaking capability of vessels. The paper spreads the mixed models of a method of final elements to solve the problems of plate bend on the elastic foundation (an ice cover). The task is solved by means of the mixed triangular element. The paper offers to take into the accounting a rigid support of a plate on the border. The obtained ratios considering an "increase in rigidity", allow us to reduce the number of the equations of allowing system by the number of elements on a plate contour. Using a round plate as an example the article shows a convergence of numerical solutions to analytical ones.
Optics
The main postulates of adaptive correction of distortions of the wave front in largesize optical systems
# 03, March 2014 DOI: 10.7463/0314.0700488 Some conceptual reasons on development and creation of the adaptive optical systems (AOS) in difficult sendreceive optical complexes are considered. The main postulates of adaptive correction of distortions of the wave front (WF) in these complexes are for the first time formulated and offered. Discussion of results of pilot studies at the complex stand in natural conditions is carried out. Ways and possibilities of decrease in power losses in transferring optical complexes with use of methods and means of adaptive optics are shown efficiency of use of the offered postulates of adaptive correction in largesize optical systems, and also ways and possibilities of decrease in power losses in transferring optical complexes with use of methods and means of adaptive optics.
Metallurgical Engineering
Comparative estimation of technological capabilities of polymer quenchants
# 03, March 2014 DOI: 10.7463/0314.0700099 The paper presents a comparative estimation of technological capabilities of domestic polymer quenchants with different chemical composition such as UZSP1, KamgidrolZAK and Acresol. The influence of polymer concentration on cooling ability is presented. Intervals of working temperatures for each quenchant were defined and the influence of industrial pollution on the cooling ability was estimated. The paper makes evaluation of the operational stability and the effect of anticorrosion additives on the cooling ability of each to the quenching medium. There are practical recommendations on application of quenchants in the industry.
The maraging steel corrosion properties with hardening of different kinds after double aging
# 03, March 2014 DOI: 10.7463/0314.0699856 The paper examines a possibility to apply the ÈP 678 and ÈP 817 martensiticaging steels to manufacture the forcemeasuring resilient member in electronic straingauge balance. It proposes to use double aging, namely main and lowtemperature one as a hardening heat treatment after hardening. Microstructure, Xray microanalysis, Xray diffraction, potentiodynamic researches have been conducted, and structure and properties of hardended samples after main and double aging have been compared. It is established, that double aging causes extra hardening of steels, but it has a different influence on corrosion resistance of steel, namely the corrosive properties of AP817 steel containing copper are improved due to formation of uniformly distributed cathode εCu corpuscles; the corrosive properties of AP678 steel are deteriorated because of increased heterogeneity of structure.
Economic Sciences
The results of research on the effectiveness of line management
# 03, March 2014 The article presents the results of research, using a model of a control loop that uses the influence of various principles of the regulation on the management efficiency. It gives an interpretation of regulatory principles, which are used in technical systems, as applied to the management. Regulation is estimated by the coefficient of regulation efficiency. According to research results, conclusions are made concerning the expediency to use the regulation principles, on rejection, perturbation, and combined control, depending on the duration of external disturbance and delays in decisionmaking.
Education Sciences
Problems and Prospects of Higher Technical Education System's Transformation
# 03, March 2014 Article is devoted to the issue of transformation of higher technical education. The importance of educational practices in the modern world is discussed. Need of change of an educational paradigm as a whole, and in technical education, in particular is proved. Existing educational practices are considered and problems which arise in the modern world in connection with them are described. Based on the materials of the conference "Modern educational technologies and their use in the system of humanitarian training of engineers" with use of a method of the object and documentary analysis the main problems that exist today in the Russian Higher Technical School are revealed.
Features of using multimedia technologies at lecturing programming
# 03, March 2014 The article generalizes the results for ten years of lecturing on programming to the undergraduate students at the Department of Computer Systems and Networks of BMSTU using multimedia equipment, namely computer, projector and screen. Two ways of using multimedia equipment: a demonstration of presentations and running programs in software environments are Identified. The article discusses examples of slide presentations and formulates positive results of the multimedia use. It reveals weaknesses to deliver lectures using presentations and offers the ways for their elimintation.
Problems of engineering education and their decision involving industry
# 03, March 2014 This article discusses the problem of training engineers for the aerospace industry. The paper discusses the issues raised at an international forum in China (Beijing, September 2012), which the author attended. Using an experience in activities of industryintegrated faculties of Bauman Moscow State Technical University (BMSTU) and 29 years of personal experience as a Dean of one of such faculties the author formulates the basic principles for the rational construction of highly efficient educational process in cooperation with leading industrial enterprises. There are five fully functional faculties of this type at the University, and the main condition for the successful implementation of the system under consideration is an active involvement of the enterprise.
Cognitive visualization as a support instrument by individual education
# 03, March 2014 The article considers a process to form an individual curriculum using the cognitive visualization and cognitive maps methods. It researches the possibility to visualize and track the learning paths in direct communication between a tutor and a student, and with a learner using an intelligent computeraided training system (including virtual tutor). The first case concerns the method for joint constructing the personality resource cards by student and tutor. In the second case a method for constructing the diagnostic knowledge cognitive maps, which automatically synthesize an individual curriculum and contribute to its maintenance, is considered.
Appendix Engineer in Modern Russia# 03, March 2014 The article deals with professional training of engineers and situation in the domestic labor market. Higher school situation, industrial assignment and graduates’ employment is analyzed by the main customer of knowledge – a diploma Alevel student of the leading engineering university of Russia. Graduates monitoring and adaptation in industry is emphasized as a key factor for successful improvement of training curricula. Lack of domestic industry job opportunities for Alevel class graduates possessing high communicative competence stimulates brain drain abroad.
Foreign Education
ITALY: Italy University Course Dropout Rate Hits 40%
# 03, March 2014 Forty percent of students who enrol in an Italian university fail to graduate from their chosen course, a report released last Wednesday has shown, reports The Local. After the first year alone, 15% of students on threeyear courses drop out altogether, while the same proportion switch courses, the report by educational agency Anvur found. The remaining 10% abandon university at a later stage of their course.
South Africa: SA to Get Twelve New Colleges
# 03, March 2014 Twelve new further education and training colleges will be built across South Africa because of increasing enrolments at universities and colleges, said President Jacob Zuma."Student enrolments at universities have increased by 12%, while further education and training college enrolments have increased by 90%," he said at the launch of a scholarship fund in Sandton.
JAPAN: Kyoto University Seeks Break from Tradition in Looking Outside for President
# 03, March 2014 Kyoto University is set to select a new president from outside its academic staff, doing away with a nearly centuryold tradition of voting only for an inhouse candidate, writes Tsuyoshi Sato for The Asahi Shimbun.The alma mater of several Nobel Prize winners is reportedly considering potential leaders from within Japan and within the university as well as from overseas, with an emphasis on management skills to improve the institution's international competitiveness.
SYRIA: Rebel Academics Set up University to Save Syria's 'Lost Generation'
# 03, March 2014 In many ways, Musab AlJamal makes for an unassuming rebel, writes Daisy Carrington for CNN. The former law professor from Damascus University has joined other academics to start offering lectures to students in liberated regions inside ravaged Syria and in neighbouring countries."The universities in Syria are basically like prisons for students," says AlJamal. "They capture or arrest anyone who opposes the regime. On the other hand, universities outside the country often don't accept Syrian students, or the students can't pay the fees or speak the local language."
Shrinking Enrollments in Poland
# 03, March 2014 After growing rapidly for two decades, higher education enrollments peaked in 2009, having risen fivefold to almost 2 million. This year, the numbers have tailed off and are set to fall farther, even though Poland’s university enrollment rate is the fourth highest among Organization for Economic Cooperation and Development nations.Many universities – from the state and the private sector alike – are under threat because in the years of plenty they failed to prepare for the coming downturn in student numbers.40 percent of Poland’s higher education institutions had no international students at all, the report notes. Universities that are unable to attract international students have been forced to draw more from the shrinking pool of domestic students to maintain enrollments. And this has led to complaints that today’s students are less prepared for higher study than their predecessors were.With institutions’ resources now concentrated on science, technology, engineering and mathematics subjects, he continues, social science and humanities faculties are particularly feeling the pinch. “Universities have said they will not continue to pump money into lossmaking faculties, which should be made to pay their own way,” Stanley says. This has led to cutbacks, “certainly at postgraduate level.”



