Vol 7, No 1-4 (2013)

The method and algorithm of the computer analysis tensely - the strain state of apparatuses with the jackets, belong to the class multiply connected shell constructions with a follow distinct path meridian was explain. Convergence on the software of the proposed method of calculation is result.

The exposition of the program complex intend for computer monitoring of a carrying capacity and a resource of tubular elements of constructions, work in the conditions of a low-cyclic loading are given.

This article analyzes the advantage of application the principle of self-synchronization based on the dynamic memory devices. For increasing the immunity of networks a variant of the principle of self-synchronization using n-positional dynamic memory device is suggested.

A modification of the algorithm Nealder-Mida is proposed when the point, which determines the direction of reflection the “worst” node, is chosen based on the values of minimazed functions in the rest of the vertices of a simplex. There was investigated the efficiency of the proposed modifications on the test functions.

When using predictions in the controling of the rotational motion arises the need to build a double-smooth trajectory passing through its previously measured key points. As piecewise polynomial curve, providing the desired smoothness, there is considered the interpolation by cubic splines that in the intervals between the nodes are actually the cubic parabola, continuously connecting the nodes with the degree of smoothness. When imposing additional boundary conditions, data splines minimize its total curvature.

There was performed a numerical studies on the basis of which the dependencies enabling one to assess the influence of the composition of the gaseous fuel, characteristics of burners, outside temperature of pipes and sizes of the radiant camera tubular furnaces of oil refineries on radiation heat transfer in combustion chamber during the change of chamber from natural gas to gaseous fuels of other structure.

The article considers the possible ways of protection of intellectual activity results in the field of environmental engineering. The main objects of protection, as well as corresponding legal institutions are defined. Gained results. Can be applied for all entities involved in the process of creation and commercialization of objects of intellectual property.

Mathematical model of absorber for small volumes of cleared gases is proposed. There are made calculations of the basic dimensions for the pilot facility, calculation of the basic sizes of absorber for industrial installation, which showed the operability of the mathematical model for large-tonnage production.

In neutral (рН 7,55) and alkalescent (pH= 8,74) chloride-containing solutions there was examined the electrochemical corrosion behavior of carbon steel model containing up to 1,05 % Cr. It is shown that the chromium containing in carbon steel hampers their passivation, but microalloying it with titanium has a beneficial effect on their passivity and pitting resistance. The view is suggested that the observed effect of chromium and titanium on passivity and pitting resistance of low-alloy steels is connected with the change of the energy state of the surface of the metal.

In this article there was confirmed the possibility of obtaining domestic lime sorbent on the basis of the microcrystalline calcium hydroxide corresponding to their physical and chemical properties to the best foreign analogues. There were analyzed the parameters of the traditional technological process of lime slaking. In the laboratory conditions there was developed a damping technology, allowing to get the lime sorbent with large adsorption surface.

The article discusses various ways to produce biodiesel fuel: in the presence of homogeneous catalysts, in the presence of heterogeneous catalysts, in supercritical methanol. There was experimentally confirmed that the process of obtaining methyl ethers of fatty acids (FAME) in the supercritical methanol on the selectivity, on replacement of the target product and process stability in time can compete with catalytic methods. There was studied the efficiency of the catalyst at the transesterification of rapeseed oil in supercritical methanol under the following process parameters: temperature of 300°C, the pressure of 300 atmospheres, the volume fraction of oil 0,5. There was evaluated that during the first hours after the filing of the reagents into the reactor in the presence of a catalyst TiO2/Ti concentration FAME in the oil layer of the reaction products is more than in not catalysed reaction. However, approximately one hour after the beginning of the process of catalytic activity was sharply reduced, and the output of the FAME becomes less, than without a catalyst. By means of mass-spectral analysis of the product, extracted from the surface of the catalyst, it is discovered a tumor in the process of interesterification low-volatile and poorly soluble substances, blocking the active centres of the catalyst. In addition, the reduction in catalytic activity became the result of partial destruction of the surface layer of TiO2. It is established, that the washing of the spent catalyst mixture of solvents with the subsequent heating at 350°C allows largely to restore the activity of the catalyst.

The paper proposes a method for building of automatic recognizers of aircrafts on a set of radar measurements based on the cascade of multilayer feedforward neural networks. The practical application of this technique in recognizing of three types of aircraft is presented as well.

This article presents the main types of noise barriers and their characteristics. The calculation of a noise barrier (wall) is shown.

In the article there are considered the basic principles of the method of rapid diagnostics on the basis of microindentation allowing to register the dynamics of accumulation of scattered damage in a wall of a structure in the sustained loading and predict the residual life.

In this article it is considered the questions of integration of Plant Information System (PI System) with Labview graphical programming language. Mechanisms of interaction between the systems are considered. Examples of a program code are given.

The article presents a general method for construction of separating surface for sets of points in a feature space. The method is based on using of hyperplanes normal to intercenter vectors of sets.

The paper examines the highlights of mixture theory on the basis of generalized nonlocal (discrete) thermodynamics that involves Shannon entropy. Generalization of the equilibrium thermodynamics is obtained basing on the hypothesis of quantized entropy. The paper defines the elemental macroscopic thermodynamics space that serves as the basis of the mixture theory. The theory allows to use generalized thermodynamic method instead of empirical equations including laws of Raul and Dalton.

The paper describes the functioning of system elements and technological processes of heat hydraulic cluster. The development objective is to create a universal tool for the preparation and functioning of computational models for clients which allow working simultaneously with three-dimensional schemes, functional diagrams and visual programming elements.

The paper examines the problems of videoecology of urban environment, ways on correction of mistakes in architectural design and practices in creation of visually comfortable urban environment.

In the paper, using the methods of reliability theory and calculus of variations was posed and solved the problem of increasing the efficiency of industrial equipment at enterprises on processing of solid household waste. An experimental base for research was the actual operating time to failure of machines and equipment of existing waste treatment plants of Moscow. Results allow to choose the operating modes corresponding to maximum reliability of the equipment.

The article gives a classification of intensification the methods of heat- and mass transfer. There are examined some advantages and disadvantages of nozzle and poppet pin devices. The method of influence analysis of nozzle form and construction on heat-, mass transfer process is provided. There is also described the effect of different parameters on the choice of the design of the nozzle. In article there were compared the most common in industry types of bulk and regular nozzles. An alternative method of intensification of heat and mass transfer finally was proposed.

The modern level of electro-optic technology development makes it technically and economically feasible to use them in the motor vehicles and allows it to achieve significantly better results than when choosing conventional solutions. Rapid progress in this field requires operational research on specific systems and components that can be used with the use of laboratory stands running LabVIEW.

The article describes the process of feed additives production containing enzyme complex. A mathematical model of the process was developed. The system of automation and calculation of optimum time of process termination is proposed.

The possibility of creation of control systems with fractional order controllers, their advantages and difficulties encountered in the implementation are considered in the article.

Designed fuzzy logic algorithm and software and information management decision support system for the rational choice of supplier in the supply chain by using the analytic hierarchy process (AHP) and the operations of the theory of fuzzy sets. The functioning of the DSS has been verified experimentally on real accounting and statistics. The results of numerical experiments confirmed the effectiveness of the proposed algorithm for the adoption of logistics management solutions.