Другие журналы

scientific edition of Bauman MSTUSCIENCE & EDUCATIONBauman Moscow State Technical University. El № FS 77  48211. ISSN 19940408
# 02, February 2012
Machine Building and Engineering Science
7730569/362086 Efficient use of NC machines under conditions of multiproduct manufacturing
# 02, February 2012 The article covers the data on actual functionality of NC machines as part of multiproduct manufacturing facilities; the data is based on the author's production research. The main categories of fund consumption were analyzed. The main problems of introducing uptodate highperformance NC machines at domestic machine building plants were considered. The results and recommendations presented in the article can be used to solve design problems or for technical reequipment and upgrading machining process.
7730569/345938 New method of research of material properties under high dynamic pressures
# 02, February 2012 DOI: 10.7463/0212.0345938 The author shows comparability of dynamic characteristics of cutting processes and tests of materials in high dynamic pressures environment. Possibilities and advantages of using the cutting method as a new method of studying physicalmechanical properties of materials were considered at highspeed deformation and destruction.
7730569/341866 Research of phase transformations in ageing alloys NiAl, by the method of a differential scanning calorimetry (DSC).
# 02, February 2012 By the method of differential scanning calorimetry the authors studied phase transformations in the binary alloy NiAl (7%Al) formed at the disintegration of a supersaturated solid solution. It was shown that formation process of phase Ni3Al is connected with hidden crystallization heat release.
7730569/339658 Method of creation of a set of variants for item assembling based on oriented hypergraphs
# 02, February 2012 The article presents a method of generation of assembly variants for a multipart device. The model of the multipart device is based on oriented hypergraphs of constraints. The oriented hypergraph describes the impossibility of assembly when constructional, technological, economical causes are present. Visual interpretation of the hypergraph is proposed; examples of constructive and technological constraints for the shaped charge are described.
7730569/339556 Nitrogen in the singlecrystal heatresisting alloys
# 02, February 2012 The authors study the influence of nitrogen on the form of primary carbides in charge intermediates of alloy GS 30VI. Metallographic researches of the structure and forms of primary carbides were conducted in initial charge intermediates with various impurity content of nitrogen. It was established that with the increase of nitrogen content from 0,00040,0008% to 0,00150,0035% carbide morphology acquires a rounded or polyhedral form instead of laminar. The authors present the dependence between the impurity nitrogen content in the heatresisting alloy and the quality of produced singlecrystals. The authors propose a formation mechanism of primary carbides of various morphology during melt solidification.
7730569/319511 Instrumental methods of control over content and properties of polydisperse medium
# 02, February 2012 Different methods of quality control of multicomponent mediums were reviewed in this article by the example of cow’s milk. Chemical, biological and instrumental methods were considered. Brief theoretical information, required equipment, achieved precision, advantages and disadvantages, ability of quantitative measurement of main components of the product were included. Particular attention was paid to optical – electronic methods as to the most promising for quality control both in laboratory and field conditions. Their application for determination of product’s components in various enterprises was considered. The development of new methods of analysis of the content of polydisperese mediums was planned on the basis of conducted survey.
7730569/310908 Compressordoser based on the pneumatic cylinder
# 02, February 2012 Problems with precise estimation of volume and weight flows of compressed air, when investigating pneumatic automation elements’ and devices’ characteristics, are widely known. Precise compressordoser was designed on the basis of pneumatic cylinder; it allowed to give objective estimation of weight flow of compressed air, when determining flowdrop characteristics of orifice meters. It was shown that flow gages had stable linear characteristics in the case when estimation of flow based on the measurement of the pressure at the entrance of the orifice meter at the stage of exhaustion.
7730569/310057 The dynamic diagnostic model of the mount of the winding in slot of the stator core of a powerful turbogenerator
# 02, February 2012 The dynamic diagnostic model of the mount of the winding in slot of the stator core of a powerful turbogenerator is constructed. The range of possible values of parameters of model is defined. Dynamics of the symmetric distributed vibroimpact system "winding  core" for various values of system parameters and external exciting forces is studied. Tendencies of change of parameters of the signal of shocking forces with development of defect are defined. Calculation of the spectra of signals of shocking forces that excite the vibroacoustic vibrations of the stator design is carried out.
7730569/308514 Research of the influence of fastener’s form on the strength of “metalcomposite” joint
# 02, February 2012 Practicable methods of fastening of the composite details with metal parts of designs were researched. The results of tests were presented; empirical dependence for the forecast of working efficiency of such joints was proposed. Regression and dispersion analyses of obtained test data were carried out. Future development of such joints was outlined.
Constructional Material Processing in Machine Building
7730569/315087 Form error of thinwalled workpiece fixed with cams considering the size of contact area between mating parts.
# 02, February 2012 The case of thinwalled workpiece fixing with n cams was considered. Algorithm of calculation of main parameters when fixing the thinwalled workpiece. Proposed algorithm differs from known algorithms because it takes the size of contact area and diagram of contact pressure into account. Dimensionless graphics were plotted for the case when the workpiece is fixed with three cams. These graphics allowed to determine contact halfangle, form error of workpiece when it’s fixed with three cams and movement of median surface’s points of workpiece under the cam and strictly between cams. The example of the calculation was included in this article.
Power Machine Building, Metallurgical Machine Building and Chemical Engineering
7730569/340675 Intensification of Waste Water Flotation Treatment by Vibration Excitement for Water Recycling
# 02, February 2012 Ways of flotation treatment plants usage for water recycling is described in this paper. A critics of widely used water recycling systems is given. Ways to intensify waste water flotation treatment by vibration excitement for water recycling is shown. A principal scheme of vibro flotation tank is given for water treatment. A design of this flotation tank is shown, based on the developed mathematic model. A good correlation between theoretical and experimental data is obtained.
7730569/339499 Numerical analysis of nonconservative acoustic systems for working process initialization devices in highenthalpy flow generators
# 02, February 2012 The development of nonelectric systems of multiple ignition for gas generating devices of rocket and space technologies is a pressing task. One of the promising systems is a gas dynamic system of ignition allowing to implement the progressive technology of “automatic launch”. The authors carried our simulation of local heating of a working body in an acoustic resonator with the help of solving the NavierStokes equation system. The results of the development of a resonant system of working process initialization in the highenthalpy flow generator and preparation for carrying out experimental research of the modeling gas dynamics igniter sample are presented in this work.
Transportation, Mining and Construction Machine Building
7730569/343394 Mathematical motion simulation of multilink wheeled transport complexes subject to coupling devices
# 02, February 2012 The author presents an approach to development of mathematical models of multi wheeled traffic systems and justifies the urgency of forecasting service properties of complexes at the design stage in order to improve the construction. The author gives a detailed account of the mathematical model of curvilinear motion of a twolink roadtrain; special attention is paid to the mathematical model of the link articulator. The author considers the principle of transport system simulation subject to the design features of the drawbar. Design diagrams for creating mathematical models of multitier transport systems are presented by the example of a threelink roadtrain subject to the number of wheels in the roller module of the level trailer. The author describes the principle of forecasting roadtrain dynamics based on using the mathematical model represented by rectilinear motion of twolink roadtrain offtheroad. The results of benchmark computing experiments as the visualization of movement of transport complexes are included in the article.
7730569/293578 Technique of selection of characteristics of controlled suspension bracket with two levels of damping multiwheeled vehicles
# 02, February 2012 The required level of damping a multibasic oscillatory system depends on the character of external disturbance. In connection with this, regulation of the characteristics of damping, depending on operating modes of amortization systems, is one of the basic directions of their further improvement. This direction for improving the quality of suspension systems in multiwheeled vehicles (MWV) with the quantity of axes more than three is fairly promising. The authors show that for multiwheeled vehicles, due to a narrowband lowfrequency spectrum of fluctuations of the case, the characteristics of damping which provides automatic reception in the zone of resonance of attenuation factor nearly
ψ =0,4 … 0,6 on longitudinalangular and vertical fluctuations irrespective of the weight of object and change of restoring force, was desirable. At the same time in the aboveresonance zone, the damping level should be reduced, which leads to a significant decrease of vibroload of the MWV. This leads to the necessity of creation of a suspension bracket of variable structure where there is an automatic change of the damping level depending on the kind of road roughness impact on the MWV. Two levels are enough: the basic (high), and low which joins only in the case of highfrequency road profile influence. The design procedure of elastic and damping characteristics of a suspension bracket with twolevel damping was developed. The example of calculation for the MWV with the wheel formula 8x8 in the lump of 60 tons was included in this article.
Mathematics and Mathematical Modeling
7730569/340943 About the period of generalized cellular automatons
# 02, February 2012 This article deals with problems of creating generalized cellular automatons with specified lower bounds of the period. This property is very important for constructing pseudorandom sequence generators and stream ciphers based on generalized cellular automatons.
7730569/330390 Mathematical simulation of timedependent temperature field control in twophase mediums
# 02, February 2012 This article deals with geotechnical systems, such as engineering constructions with foundation in particular geological medium, for instance, evenfrozen or thawing rock mantle. The calculation and forecast problems of temperature field extension into evenfrozen ground under building’s foundations in cryolithozone were studied. The mathematical formulation of the stationary thermal conductivity problem with different boundary conditions was given. Predicted results of ground’s thermal condition in different spatial sections were included in the article.
7730569/315838 Representations of evolution semigroups with Feynman formulas and Feynman path integrals in phase space
# 02, February 2012 In the present paper a new method of investigation and description of linear dynamics was considered. This method was based on representations of corresponding evolution semigroups (or, what is the same, representations of solutions of the corresponding equations) with Feynman formulas, i.e. with limits of finite multiple integrals when n tends to infinity. Sometimes one succeeds to get Feynman formulas containing only integrals of elementary functions. Such Feynman formulas allow to calculate solutions of evolution equations directly, to approximate transition probabilities of stochastic processes, to model stochastic and quantum dynamics numerically. The limits in Feynman formulas agree with some functional integrals with respect to probability measures or Feynman type pseudomeasures. Nowadays, functional integrals (or path integrals) play one of the central roles in mathematical apparatus of theoretical physics; they are important objects of quantum field theory, especially in the theory of gauge fields. To solve a variety of problems it is worth to apply Hamiltonian formalism of quantum mechanics and to deal with (Hamiltonian) Feynman path integrals in phase space. There are many different approaches to define such integrals mathematically rigorously. And different classes of integrable functions arise in the frame of each approach. In this paper the approach of Smolyanov and his coauthors was used. This approach allows to connect Feynman path integrals in pahse space with Hamiltonian Feynman formulas for evolution semigroups. This method was actively used last decade to describe different types of dynamics in domains of Euclidean spaces and Riemannian manifolds, in infinite dimensional linear and nonlinear spaces, to investigate padic analogues of equations of mathematical physics. The present work is expository, it brings together some of the results of recent articles of the author (joint with Boettcher, Grothaus, Schilling, Smolyanov), in which the method of Feynman formulas was subsequently developed to investigate Feller semigroups and the connection of such formulas with Feynman path integrals in phase space was studied. In this paper Feynman formulas for Feller semigroups and semigroups generated with different quantizations of a quadratic Hamilton function were obtained; a construction of Feynman path integral in phase space was introduced; Feynman path integrals in phase space for Feller semigroups and semigroups generated with different quantizations of a quadratic Hamilton function were presented.
Aeronautical and Rocket Space Engineering
7730569/332009 The calculating analysis of strength of elements of ground equipment truss structures loaded with intensive high temperature jet
# 02, February 2012 The article describes aspects of the design analysis of strength of ground equipment truss structure loaded with the high temperature jet of launch vehicle engines. The reasonable limitations and calculating model development concepts for the thermal strength calculations were analyzed. Basics of the overall strength analysis were given. The truss structure local thermal strength analysis was considered by the example of joint of piped elements.
7730569/322927 Analysis of methods and means of controlling Earth remote sensing systems
# 02, February 2012 This paper covers the research results oand analysis of methods and means of technical assessment of the condition of Earth remote sensing (ERS) systems during the test and onstream periods. The obtained results are to provide a basis for further development of testing equipment for Earth remote sensing systems; moreover, they will provide a huge base of technical documentation (standards, guidelines for aircraft equipment testing etc.) for estimation of basic parameters which characterize the efficiency of application of digital observation equipment and their technical condition. The authors proposed a technique of online testing of the transfer function of remote sensing equipment during the onstream period with a subsequent compensation of defocusing.
7730569/299736 The results of research and development of lowtemperature, fastburning, gasgenerating fuels for systems moving elements of actuators.
# 02, February 2012 The results of thermodynamic, ballistic, physicmathematical surveys of lowtemperature, gasgenerating, fastburning fuels (LGFF) characteristics. These fuels are pyrotechnic type based on nitroguanidine, ammonium perchlorate and methenamine, proposed for systems to move elements of actuators (SMEA), in particular, for gas generators (GG), for systems to openclose the underwater missiles’ steering devices (SOCSD). There are strict requirements for reaction time of these devices; it leads to the necessity of LGFF with high burning rate usage. Twenty chemical combinations were considered as modifiers to increase the burning rate. Based on obtained characteristics for different kinds of modifiers, high efficiency LGFF was created. The fuel was tested in GG and SOCSD. The results of those tests completely meet the requirements.
Instrument Engineering, Metrology and InformationMeasuring Devices and Systems
7730569/339881 Assessment of resolving power for doublelayer magnetic structures.
# 02, February 2012 The article considers quality assessment criteria for recording/reading process of magnetic signalograms with correct information readout. The authors analyzed the distortions arising during magnetic signalogram visualization. The article describes boundary conditions allowing to determine boundary values of spatial periods of recorded magnetic signalograms to which undistorted information corresponds. Recommendations on selection of doublelayer magnetic materials parameters are given. The degree of the optical efficiency for reading process, image contrast and range of the reproducing of spatial periods is determined with the usage of these parameters.
7730569/338644 The universal installation for determining parameters disbalancing of float sensitive elements of giroinstruments
# 02, February 2012 The installation of frame type for the purpose of balancing of floated sensitive element (ESE) of gyroinstruments in fluid, besides the frame, includes an electromagnetic suspension (EMS), an angle data transmitter (ADT), a torque sensor (TS) and two columns firmly attached to the foundation of frame. Armature of ADT, TS and two aligning elements (AE) of EMS were fixedly attached to two semiaxis of the frame, and their stators were attached to the apertures of the columns. AE of EMS are used both for suspension of the frame in fluid (without ESE, and then together with ESE) and as force sensors (accelerometers) allowing to determine the values of forces applied to the armatures of AE of EMS. Residual weight of Δ G or floatability of Δ P and trim moment of Md of ESE were determined with the results of measurement. The feedback “angle data transmitter – torque sensor” was used to determine the moment of static unbalance Mst about suspension axis of ESE.
7730569/326277 Hierarchical method of classification of oil pollution at earth's surface based on detection of fluorescence radiation within four narrow spectral bands
# 02, February 2012 Laser monitoring problem of oil pollution at earth's surfaces was considered in this paper. It was shown that use of laser method based on detection of fluorescence radiation within four narrow spectral bands and hierarchical method of classification, allowed to classify oil pollution at earth's surfaces with a probability of correct classification close to one.
7730569/322339 Some features of shock testing
# 02, February 2012 Some issues relating to the simulation of shock pulse excitations were considered. Common schemes of shock equipment were presented as well as the method of calculating of the parameters of elastic and elasticplastic contact zone of colliding bodies. It was shown that the conditions of simulation testing could be more severe in the sense of strength than the real object performance conditions depending on the dynamic factor value (shock spectrum).
Radio Engineering and Communication
7730569/253104 The development of clarifying targeting algorithm in radar systems with millimeter waves, used for detecting low earth orbit satellites.
# 02, February 2012 This article deals with the synthesis of clarifying targeting algorithms in radar systems with millimeter waves and beam antennas, used for detecting low earth orbit satellites. The synthesis of the clarifying algorithm is carried out using the prior information about target trajectory, and also considers the constrained beam movement trajectory of real systems.
Informatics, Computer Science and Management
7730569/345396 Analysis of properties of quasioptimal and optimal algorithms for the spacecraft spatial reorientation
# 02, February 2012 The author presents a comparative analysis of two various approaches to the synthesis of control algorithms for spatial reorientation of a spacecraft. One of such approaches is based on the concept of inverse problems of dynamics, which allows of synthesizing smooth programmed control, building controls which stabilize program trajectories, considering restrictions and carrying out numerical optimization of a trajectory by the chosen criterion. The second approach is based on the synthesis of optimal program control using the Pontryagin maximum principle. The results of numerical simulation are provided in the article. The comparative analysis of the received results is also included.
7730569/340957 Performance analysis of bilateral filtering algorithms
# 02, February 2012 Usage of bilateral filters for image smoothing allows of removing smallscale noises and details, and, at the same time, saving clearness of borders. The authors present the results of the comparative analysis for four wellknown algorithms of bilateral filtering and give recommendations for their usage for image digital processing.
7730569/341035 Nonlinear model of market sector of macroeconomic control system
# 02, February 2012 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.
7730569/339720 Recognition errors as a basis of implementation of computer arts mechanism
# 02, February 2012 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.
7730569/340562 Method of fast restoration images blurred by motion
# 02, February 2012 Motion blur is a common defect that leads to blurry images with inevitable loss of information. If motion blur is shiftinvariant 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 deblurred 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 deblurring process.
7730569/334177 Mathematical simulation of the explosive devices’ performance
# 02, February 2012 Physicomathematical 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.
7730569/334010 Estimation of conditions of coordinated work of Autonomous Information and Control Systems (AICS) and executing device at the initial design stages
# 02, February 2012 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 «Shtil1» the field of hodograph of relative velocities where coordinated work of AICD and executing device could be provided, was defined.
7730569/325885 Training and certification of experts in industrial safety of nuclear, gas power plants and complexes based on computer technologies
# 02, February 2012 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.
7730569/325917 Enhancement of a flying vehicles’ efficiency using a resource redistribution approach
# 02, February 2012 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.
7730569/324631 Theoreticallylattice model of machine and mechanical device decomposition
# 02, February 2012 The theoreticallylattice model of product decomposition was discussed in this article; it allowed to synthesize all structurally implemented threelevel 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.
7730569/309596 Vibrationbased diagnostics of elsactic model of a spacecraft.
# 02, February 2012 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 vibrationbased 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.
7730569/308732 Fuzzy interpolation
# 02, February 2012 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 firstdegree 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.
7730569/296095 Software for analysis of productivity indexes in distributed systems of data processing
# 02, February 2012 Concepts of complex that belongs to class of expert systems and designed for conduction of numeric experiments (simulation) in order to analyze productivity (timing data) indexes of distributed systems of data processing (DSDP) were considered. New class of analysis model of DSDP’s timing performances was developed in this work with optimization mechanisms of queries to distributed database taken in the account. Application of the decisionmaking process, based on holistic selection of architecture type was also developed. If frame of expert system is connected with SQL operator, then frames unite into network that corresponds to the sequence of SQL operators’ execution. Different resources of computer network are used when SQL operators are executed that is frame network goes into resources of computer network.
7730569/296127 Organization of data bases in the software solution for analysis of productivity indexes in distributed systems of data processing
# 02, February 2012 This article deals with the development of databases of ADSDP subsystem of software solution for analysis of productivity indexes in distributed systems of data processing, designed to analyze computer networks. Different problems were solved while developing schemes of databases for ADSDP; they included description of nodes, channels, DSDP topology, virtual communication channels and their characteristics; determination of node configuration and channel configuration based on the СMAT registries; distribution of transactions with description of SQLqueries and tables of DSDP databases over nodes; storage and maintenance of components of devices’ load ratio and execution time of transactions (these components are used for maintenance of ES explanation mechanism); maintenance of ADSDP data base integrity.
Mechanics
7730569/332595 Algorithm of automatic construction of meshes from quadrangular finite elements
# 02, February 2012 An algorithm for construction of finite element models consisting of quadrangular finite elements for twodimensional domains with complex geometric design was developed. The main distinctive feature of the proposed algorithm by comparison with the existing ones was a possibility of construction of irregular meshes in multicoherent areas without their preliminary splitting into the onecoherent. It was established that meshes in areas of canonical form had expressed structured character, but meshes in areas with curved boundary were irregular. The developed algorithm can be used in the general finite element technology for solving the thermomechanical problems, which arise at creation and operational development of objects of the aviation and space technics.
7730569/318597 Transverse migration of particles in the boundary layer of planeplate
# 02, February 2012 A comparison of known experimental data with numerical simulation of dispersed mixture flow in the boundary layer of a horizontal/vertical plane wall was carried out. The motion of that mixture was described with the model of interpenetration continuums; the influence of particles on carrier phase was neglected. Qualitative agreement between the calculated concentration profiles of particles with the experimental data was obtained. Taking the lateral force into account correctly described the experimental effects of local maximums of the particle concentration inside the boundary layer and the decrease of the concentration near the wall.
7730569/318125 Mathematical model of axially symmetric vortex motion
# 02, February 2012 This article deals with the structure of confined vortex motion. A mathematical model was proposed, and boundary conditions of vortex motion based on the Helmholtz theorem were formulated. A theory of vortex motion in the field of mass centrifugal forces was introduced. The developed mathematical model and formulated boundary conditions allowed to study the main features of motion which appear in vortex devices and to determine the influence of the chamber’s parameters on flow regime.
7730569/308455 Tunable acoustic filters based on the corrugated tubes
# 02, February 2012 The author briefly describes the theory of acoustic resonator based on the corrugated tubes. For easy understanding, a situation with medium at rest inside a corrugated tube was considered. Classical solutions for the resonator were obtained. It was shown that the described structure could serve as an acoustic analogue of the optical resonator. Generalizations for the case of moving medium were made.
Equipment and methods of experimental physics
7730569/325179 Complex research of thermal states of electroarc devices
# 02, February 2012 The paper considers problems of complex experimental research of highbeat states of electrode assemblies for electroarc devices working in a wide range of controlled environment pressures. The author describes methods and means of diagnostics of devices with hot cathodes (models with hollow cathode and with tungsten core cathode). The experimental setup consisted of different diagnostic equipment which allowed to determine both local and integral thermophysical characteristics of the voltaic arc, namely: high temperature of the cathode (up to 3000 K) and its longitudinal distribution, large heat fluxes into the anode (QA ≥ 1 kW) and its distribution on the working electrode surface. The results of diagnostics of electrodes thermal states were discussed, and recommendations on their use in technological electroarc devices were given in this article.
Optics
7730569/325981 Optical properties of globular photonic crystals based on ferroelectricdoped artificial opals
# 02, February 2012 The method of introduction of ferroelectric nanoparticles into artificial opals' pores was proposed and implemented. The optical properties of the original sample and the ferroelectricdoped crystal were compared. The theory that can describe and predict the spectrum’s observed features was developed. The electrooptical properties of composites were analyzed. The possibility of the nanosystem's secondary emission spectrum control was discussed.
7730569/307989 Physics of optical soliton, time and frequency characteristics of Rayleigh scattering
# 02, February 2012 The author analyzed the process of optical soliton’s occurrence due to the balance between two competing physical processes; they are dispersion spreading of light pulse and phase selfmodulation (PSM) which occurred due to the nonlinearity of optical signal’s propagation medium (Kerr effect). The method of compensation of the optical signal’s chromatic dispersion in the fiber was proposed. Analytical expressions of mathematical expectation and dispersion of the repetition period of solitons and the value of the solution signal were obtained from random time of the pulse’s arrival to detector. The obtained data must be taken into consideration when calculating signaltonoise ratio in soliton of the fiberoptic transmission system (FOTS). The analytical expressions of time response, amplitudefrequency characteristics (AFC) and phasefrequency characteristics (PFC) were obtained for different input signals: for Dirac delta function and for Gaussian. These characteristics were conditioned by Rayleigh backscattering.
Power Engineering
7730569/331076 Choice of vehicle diesel engine fullload curve
# 02, February 2012 The mathematical model of automatic control system for a vehicle diesel engine was presented in the article. Calculation research on the influence of a fullload curve shape on diesel engine dynamic characteristics, exhaust toxicity characteristics in the transient process was carried out.
7730569/322717 Theoretical and experimental research of Field Reversed Configuration.
# 02, February 2012 The main aim of this work was the study of the process of formation of reversefield magnetic configuration (RMC) and search of the way to increase the plasma’s energy content at this stage. New method was proposed to manage this task; it suggested to form a compact tore. Experimental research of this method was carried out; it was shown that the usage of this scheme allowed to increase the efficiency of energy transfer from capacitors batteries into plasma. The main result was that method of RMC formation was experimentally confirmed. Efficiency of energy transfer up to 90% was achieved. The main distinctive feature of this method was a new technique of configuration formation. Obtained results could be applied to the research of possibility to use a compact tore configuration as a fundamental of fusion reactor that is the source of highdensity plasma. Also the possibility of using RMC as a basis of a rocket engine was discussed. Various types of thrust were presented in this article. For a more detailed investigation of the properties of obtained plasma and possibilities of its application the future development of experimental setup was needed.
7730569/308995 Сonvergence acceleration of iterative solutions of SLAE by means of neutralization of big characteristic values in the transfer matrix
# 02, February 2012 The authors propose a method of convergence acceleration for iterative solutions of SLAE from electrical network modeling systems. This method was based on the neutralization of the transfer matrix dominant characteristic values. By the example of AC electrical networks’ computation defined with matrices with complex numbers the dependence of iteration number of GaussSeidel method on the number of neutralized roots was shown. The calculated data corresponded well to theoretical convergence estimate obtained from the characteristic equation roots. The ability of additional convergence acceleration by means of root neutralization was shown in the successive overrelaxation method.
7730569/306859 Creating and verification of pollution model of workshop in case of emergency emission of gaseous uranium hexafluoride
# 02, February 2012 Pollution model of workshop in case of emergency emission of gaseous uranium hexafluoride was described. The results of calculation of parameters, which characterize the distribution of uranium hexafluoride hydrolysate in the volume of workshop, were presented in the article. The method of experimental determination of these parameters and the results of their measurement were described. The experimental results are in good correlation with calculated ones, that’s why developed model is suitable for the calculation of the dose that safe for the human in the workshop
Metallurgical Engineering
7730569/327112 Ordered structures of clathrates as combinations of special helicoids
# 02, February 2012 The symmetry of a clathrate crystal can be adequately displayed within the apparatus based on constructions. The apparatus of algebraic geometry and topology was proposed for fundamental description of tetrahedral and tetracoordinated structures. Such a description allows to represent any structure as a combination of helices (rods) consisting of polyhedrons i.e. cavities of clathrates or coordination polyhedrons of intermetallic semiconductors. The crystal lattice can arise only as a variant of such a combination. Crystal structures of clathrates (gashydrates and intermetallic semiconductors) are described as a combination of helicoids with nonintegral swivelling axes 10/3, 12/5 и 15/4. The structure of clathrate IX (Ba24Ge100) for the first time was determined as dual to the βMn structure.
Electronics
7730569/332077 About possible usage of copper nanoparticles for increasing of durability of sealed CO2laser
# 02, February 2012 A new technology of manufacturing electrodes containing precious metals for high durability of the sealed CO_{2}lasers was proposed. Promising results were obtained at use of regenerators of CO_{2} based on copper oxide grown on a layer of copper nanoparticles.
7730569/332405 Monitoring procedure of a nanosized dielectric charge of MOSFET
# 02, February 2012 A dielectric charge degradation monitoring procedure of nanosized shortchannel MOSFETs under highfield tunnel injection at different temperatures was proposed. The consequent I_{d}(V_{g}) measurement in addition to injection stress was proposed. The proposed technique shows exponential dependence between charging/discharging of traps in dielectric versus time of measurement.
Economic Sciences
7730569/332920 Ranking enterprises of mechanical engineering for estimation of their innovative potential and investment attractiveness
# 02, February 2012 Transition to an innovative way of development is a longterm task and, along with revealing the investment appeal, is aimed at results in the future. In this case comparison of financial and technological stability is more important than comparison of financial results. Interpretation of technological stability was defined as an ability of the enterprise to perceive achievements of science and technology, constant perfection of organization and production management on the basis of IT, transition from extensive to intensive technologies, development of personnel potential, transition to the process approach on the basis of reengineering of industrial and business processes. Economic stability is defined by indicators, while technological one is defined by factors. The importance of constantly operating factors was shown by the example of such factors as commercialization of innovations, enterprise competitiveness and the presence of constantly operating program of perfection of organization and production management and sale of production on the basis of IT and reengineering of processes.
7730569/315824 Intellectual property protection of innovative companies in the medical industry.
# 02, February 2012 The article contains necessary and demanded data for general managers of innovative companies in the national medical industry, for specialists, postgraduate students and students of economical specialties of technical universities in the field of intellectual property protection. The authors present a classification of patent right objects as well as forms and ways of knowhow and technology transfers. Particular attention in the article is paid to the necessity of patent protection of inventions, useful models and results of intellectual activity, especially in such hitech industry as production of medical devices. Comprehension of this fact by heads of companies, undoubtedly, will raise their organizationaleconomic stability.
7730569/310686 Development of complex approach to research and modeling of branch market demand for scienceintensive industrial equipment
# 02, February 2012 The author proposes a complex approach to forecasting branch market demand for scienceintensive industrial equipment. The approach is based on the multilevel complex model developed by the author; this complex model includes a model of forecasting general demand and a set of prognostic models of subproblems. Recommendations for implementation of each level with regard for specificity of scienceintensive projects and branch markets were presented. Implementation of the proposed approach will allow manufacturers to estimate adequately the market potential of equipment created during developing high technology projects, to develop certain technical and economic requirements to a designinprogress and to create preconditions for growth of costeffectiveness of projects.
Education Sciences
7730569/303288 Criteria and indicators of students` vocational thinking culture and levels of their development
# 02, February 2012 The necessity of development of students’ vocational thinking culture was described in this article. Besides, the author gives a definition of the "vocational thinking culture" concept and presents its components specifying the structure of this concept. The author also describes criteria, indicators and characteristics of levels of vocational thinking culture development; some testing materials were used to find out the level of vocational thinking culture and some results of the experiment at considering and evaluation stages of the experimental work were included in the article. The testing materials described in the work allowed to determine students’ levels of development of the vocational thinking culture. The developed criteria and indicators are of theoretical and practical importance for further research of vocational education problems.
7730569/301014 Status and development of research on the activityfocused theory of learning in higher education
# 02, February 2012 The first in the history of education, collective consideration of all parts and features of activitybased learning paradigm in higher education (concepts, learning theories and methods of analysis or development of specific training based on theory) is presented in this article. Application of the theory is provided by procedural guide to the implementation of activityoriented teaching methods for the first time in the practice of secondary and higher school. Bibliography of author’s works on all stages of the paradigm’s development is also presented in this article.
7730569/299700 System approach to teaching physics to engineers
# 02, February 2012 The author proposes a new system of physical quantities and dependences that could be used in teaching physics. The author describes dimensional fundamentals of the multilevel system of physical quantities and the principle of determination and visualization of dependences, and also provides samples of such visualization for three divisions of physics: mechanics, thermal and emitting quantities and electromagnetic quantities and dependencies. The most valuable part of the system is that its users who understand the uniqueness of the system’s multilevel nature and formal rules of exploring dependencies could easily find dependences which present natural relationships. This way they can avoid thoughtless memorizing of numerous physical formulas. Furthermore, the skill of creating formulas from other formulas, which can be difficult for engineering students, becomes less important and not necessary.
Documentary Data
7730569/327076 About metrological examination and most compelling problems of metrological support
# 02, February 2012 The article deals with problems of metrological assurance and forms of state regulation in the field of assurance of uniformity of measurements. It was shown that in terms of successful implementation of the innovation policy metrological assurance was only one of the few instruments of innovation development of science, engineering, technology and material science for their critical issues. It is necessary to develop an order of organization and conduct of metrological examination of contractual documentation, procedures for formalizing and implementation of results of metrological examination of contracts and agreements. And it must be a very serious document of real professionals.
Software
7730569/308104 Optimization of transient processes in technical systems using simplex method and MatLab system
# 02, February 2012 The author developed a complex of programs allowing to automate numerical multiple criteria optimization of transient processes. The simplex method and MatLab system were used for optimization. The complex is convenient, easy to expand and applicable for a wide range of technical systems.
Appendix General Problems of Engineer Education
7730569/323937 Monitoring and estimation of students’ knowledge using modulerating system
# 02, February 2012 This article considers different ways of improving the modulerating system applied to the “Engineering Graphics” department. The authors analyzed features of current and scheduled academic performance ratings. It was suggested to control academic performance ratings of students continuously during the whole term. The survey of graphical tasks’ labor intensity showed that students spent more time in classes than 30 or 40 years ago; the quality level of training didn’t increase proportionally to time spent. Proposals concerning revision of set of disciplines in general and reducing the number noncore disciplines in favor of fundamental and technical disciplines were made. The authors suggested using new methods to motivate students; these methods are widely used at BMSTU.
Foreign Education
UK Still Destination of Choice for MBAs, Says GMAC
# 02, February 2012 Controversy over the UK government’s work visa policy has not deterred aspiring MBAs from outside the UK from applying to UK schools, according to the latest (2011) test result figures from the Graduate Management Admissions Council (GMAC), administrators of the GMAT test. Indeed the UK is now the second country of choice for MBA applicants after the US, overtaking Canada, which ranked second in the 2007 survey.According to GMAC 4.49 per cent of all testtakers sent their test scores to UK schools in 2011, up from 3.39 per cent in 2007. The US still dominates as the MBA location of choice, however, with 77.24 per cent of applicants sending their test scores to US schools.
Massachusetts Institute of Technology (MIT) Launches Free online 'Fully Automated' Course
# 02, February 2012 Massachusetts Institute of Technology (MIT), one of the world's toprated universities, has announced its first free course which can be studied and assessed completely online.An electronics course, beginning in March, will be the first prototype of an online project, known as MITx.The interactive course is designed to be fully automated, with successful students receiving a certificate.The US university says it wants MITx to "shatter barriers to education".This groundbreaking scheme represents a significant step forward in the use of technology to deliver higher education.
UNITED KINGDOM: University Maths 'too Difficult' for British Students
# 02, February 2012 Universities are being forced to “dumb down” standards of maths because of the sheer number of children leaving school with poor numeracy skills, according to research.Many institutions are “marginalising the mathematical content” of degree courses amid fears English students are incapable of the most basic sums, it emerged. Researchers said many subjects – outside of full maths degrees – required good levels of numeracy, particularly those employing quantitative research methods. This includes disciplines such as the social sciences, medicine and psychology.
INDIA: Big Jump in Students Taking Global Graduate Exam (Graduate Record Examination (GRE))
# 02, February 2012 As an indication that more Indian students are looking at foreign countries like the US for higher education, the Graduate Record Examination, or GRE, witnessed an increase of 43% in students taking the test from India last year, reports the Deccan Chronicle.Some 800,000 students took the examination from around the world in 2011, an increase of 13% over the year before.
Degree Places Switch From University to FE Colleges
# 02, February 2012 Further education colleges are going to play a bigger role in offering degrees in England, as colleges are awarded funding for thousands of places previously held by universities.Universities Minister David Willetts has announced that about half of the allocation of 20,000 lowercost places will be in further education colleges.Places were reserved for institutions with fees of £7,500 per year or less.
IRELAND Could Soon Have Four More Universities
# 02, February 2012 Ireland could soon have four more universities if plans by institutes of technology get the goahead. The political battle is now up and running among the colleges to get the badge ‘technological university’, Kim Bielenberg reports for the Irish Independent.All the institutes of technology except IADT in Dun Laoghaire have come together in clusters and are seeking the new title. From Letterkenny down to Tralee, there are hopes for university status and the economic benefits that this could bring.
BANGLADESH: Private Universities Asked to Move Within a Year
# 02, February 2012 Private universities that have failed to move to their own permanent campuses have been given an extended ultimatum of one year, reports The Daily Star. No universities will be allowed to open new courses, programmes, institutes or faculties or extend their campuses until they move to comprehensive campuses.The decision came at a meeting of the University Grants Commission with Education Minister Nurul Islam Nahid last week. The meeting was convened to take a decision about private universities that have failed to relocate as per the Private University Act 2010.
History of Progress
7730569/347553 In commemoration of Alexander Graham Bell (03.03.1847 – 02.02.1922)
# 02, February 2012 The article presents a brief review of the main achievements made by Alexander Graham Bell – an outstanding American inventor, the author of 30 US patents in the field of telephony and recordingplaying sound. A. G. Bell’s background was included along with some interesting facts of his life. His invention of the telephone started the development of mass communication equipment in America and Europe. R&D company Bell Laboratories has produced thousands of inventions, including the first actual sound system for cinematography. Several scientists of Bell Laboratories received the Nobel Prizes.



