Department «Constructing of radio-electronic and microprocessor systems», ÒSTU
Key words and phrases: complete analysis of optimum control; identification models; information technology; real-time synthesis; set of operation conditions; tasks of optimum control.
Abstract: Problems of designing power saving controls systems of dynamic objects, with reference to the basic stages of life cycle: pre-design studies and formalization of optimum control task, model identification of object dynamics, analysis and synthesis of optimum control, introduction and system management in service are considered.
Key words and phrases: linear on controlling actions of optimum control tasks; not local continuability of solutions; properties of solutions.
Abstract: Properties of not locally extendable solutions of linear on control actions of optimum control tasks are investigated. Conditions of not local continuability solutions and not activization limitations at switching optimal modes are given.
Key words and phrases: integrated design; flexibility of chemical processes; uncertainties; stochastic optimization; one- and two-stage problems; «soft» and «hard» constraints; control system; optimal control; settling of regimes; continuous and periodic chemical processes.
Abstract: Aspects of practical application of suggested methods and algorithms of flexibility analysis and integrated design of reactor systems of thin organic synthesis and systems of automatic control of their regimes are considered.
Key words and phrases: consulting; production of ethanol; frame; consulting model.
Abstract: Components of the developed expert control system of material and power streams of alcohol production and their interrelation are described. Universal frame structures of knowledge representation and databases are developed. The way of creation of user interface is shown. The approach to development of information and software models, practical implementation of the expert synthesis model of alcohol production states forecasts are formalized.
Key words and phrases: aviation radio-electronic complex; organizational- technical system; preventive arrangements; rational and basic schedule; functions of the penalty.
Abstract: The technique of preventive operations planning in organizational- technical systems is considered. The example of its practical application is given.
Key words and phrases: error estimation; laminar flow; mathematical modeling; measurement; return regional problem; thermal characteristics.
Abstract: The method for continuous measurement and the control of liquids thermal properties is offered by a method of laminar mode, the algorithm of results processing of measurements is submitted. The analysis of error sources is submitted at finding liquid thermal properties by a method of a laminar mode.
Key words and phrases: electromagnetic wave; microwave heating; organic matters; water contents measurement.
Abstract: Microwave method of determining moisture of organic compounds based on the contrast absorption of electromagnetic wave energy by water and liquid dielectric is proposed. Construction description and working principle of the device to implement the developed method is given. The results of experimental research are given.
Key words and phrases: wave hydrodynamics; scheduled model; surface waves; long waves; nonlinear-dispersing model.
Abstract: Some methods of construction of bi-dimentionals by way of the approximate models describing spread of long surface waves, taking into account nonlinear and dispersing effects are discussed in case of potential current of ideal incompressible liquid. In particular, the new non-linear dispersing model, suitable for studying distribution of long surface waves and their interaction with a body partly immersed in liquid is obtained.
Key words and phrases: adhesion; contact angle; particle coating; spouted bed fluid dynamic.
Abstract: This work aimed at investigating the fluid dynamics of the conventional spouted bed during a coating process, using several inert particles such as polystyrene, polypropylene, polyethylene of low density, ABSÒ, placebo tablets and glass beads, analyzing the adhesion of the film on the particle and the influence of the physical properties of the particles and of an aqueous polymeric coating suspension on the fluid dynamics.
Key words and phrases: adhesion forces; cohesion; constitutive models; particle mechanics; powder mechanics; powder compressibility; powder flow properties; titania nanopowder; van der Waals forces.
Abstract: The fundamentals of cohesive powder consolidation and flow behaviour using a reasonable combination of particle and continuum mechanics are explained. By means of the model “stiff particles with soft contacts” the influence of elastic-plastic repulsion in particle contacts is demonstrated. With this as the physical basis, the stationary yield locus, instantaneous yield loci and consolidation loci, flow function, consolidation and compression functions by the flow properties of a very cohesive titania nanopowder (surface diameter ds = 200 nm) are presented. These models are used to evaluate shear cell test results as constitutive functions for computer aided design of process apparatuses for reliable powder flow.
Key words and phrases: Gas-solids direct contact; Dilute gas-solid suspension; Packed contactor; Interactive forces.
Abstract: Interactive forces between the three phases (gas, fine particles, and coarse and dense particles) govern the direct contact mechanism that occurs in the Gas-Solid-Solid Packed Contactor (GSSPC). Using continuity and momentum equations, these interactive forces are derived as functions of the overall pressure drop, the average dynamic hold up of solids, and the physical properties of solids, gas and a regular packing. Particle-packing walls collision model has been proposed to interpret the occurrence and physical origin of these interactive forces, to quantify them, and to predict the overall pressure drop in the three phases system.
Key words and phrases: spouted bed; hydrodynamic; fluid flow regimes; minimum spouting velocity.
Abstract: Experimental studies of the pneumatics in different spouted bed apparatuses have been studied. The operation spouting regimes have been determined in different spouted bed constructions and have been compared with the conventional fluidized bed. The spouted bed techniques are used when in the fluidised bed a homogeneous and stable flow regime is not observed as, for example, in the cases of non-spherical particles and in polydisperse and feindisperse systems. Consequently, original hydrodynamics correlations to calculate the Reynolds number, corresponding to the stable fluidization, and for the calculation of the simplex G have been proposed. The pneumatic regimes of different constructions spouted beds are demonstrated through DP-w- and Re-G-Ar-diagramms.
Key words and phrases: rapid gravity flows; particulate solids; equation of the granular medium state.
Abstract: The research on structural and kinematical parameters of rapid gravity flows of particulate solids, consisting of nonspherical cohesion particles was carried out. The complex influence of shape and cohesion properties of particles on the interrelationship between dilatation, normal stresses, and shear rate during rapid gravity flow was found out.
Key words and phrases: geometrically nonlinear contact problem; Timoshenko-type plate; mixed finite element method; perturbed Lagrangian formulation.
Abstract: A contact problem for the elastic Timoshenko-type plate undergoing arbitrarily large displacements and rotations and the rigid punch is considered. The numerical algorithm has been elaborated for solving the contact problem on the basis of the mixed FEM by using the perturbed Lagrangian formulation. Six displacements of the face planes of the plate are chosen as unknown functions. This allows to simplify a solution of the contact problems, since with the help of such displacements the kinematic conditions of no penetration are formulated, and to derive relationships for the components of the Green-Lagrange strain tensor exactly representing arbitrarily large rigid body motions.
Key words and phrases: hematite; dilatometry; dislocation; micro- and macro-destruction; monocrystal ferrite; thermal impact; chemical pickling.
Abstract: Processes of relaxation of induced thermoelastic stress in monocrystal Mn-Zn ferrite by means of vacuum dilatometry and thermal impact are studied. It is found out that linear expansion coefficient and temperature vary differently. Within 400¼700 °C sharp reduction with minimum at 600 °C takes place. Above 700 °C coefficient stabilizes at the same level or reduces slightly. Both at dilatometric heat and thermal impact under different temperatures different mechanisms influence relaxation of elastic stress. At first the main ones are shift processes of plate nucleation of non-magnetic hematite phase, then – the acts of cracking. The role of growing and newly originated structure defects as stress concentrators changes.
Key words and phrases: composites; serviceability; durability; strength; temperature.
Abstract: Analytical dependences describing borders of serviceability (strength, time and temperature) of composite and constructional materials are revealed. Influence of various factors on the physical and empirical constants determining serviceability is studied. Ways of adjustment of serviceability of composite construction materials are shown.
Key words and phrases: connecting rod of a drive gear; fatigue failure of material; longitudinal bending; pulsing cycle of loadings; temperature pressure; variable loadings.
Abstract: The technique is intended for design calculation of geometrical parameters of cross sections in connecting rods of crank-rod drive gears of movement of upper half-molds of shapers-vulcanizers of pneumatic autotyres used at tyre factories in Russian Federation.
Key words and phrases: deformation model of calculation; load-carrying capacity; standards of designing.
Abstract: On the basis of deformation model of calculation analytical expressions of nonlinear equations of equilibrium of internal efforts in cross-section of ferro-concrete element, reinforced under the loading are constructed, allowing to determine parameters of tensely - deformed conditions at all stages of for - loading both up to, and after reinforcement. Results of calculation of ferro-concrete elements reinforced under loading in two cases of reinforcement in a range of loading levels from 0 up to 65 % with various eccentricities of loads application are adduced. Charts demonstrating relation of lift capability of ferro-concrete elements from a level of loading before reinforcement are constructed. Correcting factors in values of the destructive loads determined according the system of standards and regulations are offered, allowing to take into account a level of loading before reinforcement.
Key words and phrases: horizontal movings of model; deposit reinforced ground; roll.
Abstract: Results of laboratory researches of bearing ability of the sandy basis reinforced by cores are given. Component analysis of influence of reinforcing on ground durability and deformation is carried out. Dependences of deposit, roll and ultimate load from various parameters of reinforcing are represented.
Key words and phrases: information system; information-analytical system; educational institutions certification; self-inspection; automated documents circulation.
Abstract: The new approach to ensuring processes of licensing, certification and accreditation of high school educational institutions concerned with development of specialized information-analytical systems is presented. The functional structure of typical information-analytical system for automated support of processes of self-inspection and certification of high school institution are presented. Requirements made to development of such system and application characters of their are cited. The structure of information flows when self-inspection and certification using the information-analytical system is viewed.
Key words and phrases: : intelligent resources; material resources; production volume; mastering of innovations.
Abstract: The model of the educational environment development, taking into account the state and development of the society is represented.
Key words and phrases: regionalization; regional labour market; adapting of experts vocational training in economic profile; national-regional contents of education; economic geography and region study.
Abstract: Modern tendencies for creation of regional labour market in conditions of regional economy and questions of adapting of experts vocational training in economic profile in new conditions are considered.
Key words and phrases: fuel base; generalized system algorithm; controlling of fuel bases; technological resources; return tasks.
Abstract: maintenance organization features of large hydrocarbonic fuel bases, having the federal or regional status are considered. Support features of their effective maintenance are defined, the generalized system algorithm of its organization is offered.
Key words and phrases: valid solution; task of mathematical programming; optimal solution.
Abstract: Task of mathematical programming with fractional criteria functions is considered. The effective numerical method for search of optimal solution of these tasks is offered. Convergence of the suggested method is proved. Solution of a numerical example of economic optimization is described.
Key words and phrases: coefficient of competitiveness; profitability of marketing arangements; accumulating effect; economic effect; advertising; method of target alternatives; method of comparison.
Abstract: The majority of commercial operations on the world market are carried out using marketing generalizations and forecasts. The efficiency of marketing activity of the firm is the obligatory component of commercial success. The paper describes the most frequently used methods of determining efficiency of marketing arrangements on the example of one of the firms.
Key words and phrases: aesthetic philosophy of life; conservative views; heroes; ideal of man and citizen; “law of fulfilled life”; multifaceted individuality; social ideal of “flourishing” state; universal men;
Abstract: The “aesthetic instinct” predominated the scientific creativity and conservative views of K.N. Leontyev. According to the theoretical principle of “fulfilled life” he constructed the social ideal of “flourishing” state. In that social organism only the military must be considered as ideal citizen because of their multifaceted individual and “two grate skills”: to govern and to obey.
Key words and phrases: : communication; understanding; Wittgenstein's "language-game".
Abstract: Author suggests his interpretation of the central concept of Wittgenstein’s philosophy “language-game”. He tries to avoid the evident paradox in settling of communication problem. He rejects to attribute ontological status to the language-games. The language-games are regarded as different aspects of the same language but not as the different languages.