No 3 (2015)

The paper focuses on the problem of control system synthesis and a numerical method of the network operator is proposed to search a solution. Apart from a well-known approach when the stated control synthesis problem is solved directly by the method of network operator considering given criteria and terminal conditions, the present paper describes a two-stage synthesis. The first stage is supposed to solve numerically a set of optimal control tasks for different initial values from some given space. The second stage makes an approximation of the previously received optimal trajectories by means of the network operator. An example illustrates the two-stage synthesis of a control system for a spaceship descent to the Moon

The paper presents the influence of level of tolerance as main parameter of H-robust control theory. The model of control object is developed. The actuator is a hydraulic cylinder with a feedback potentiometer with conducting windings. For practical application technological effectiveness of actuator’s design is considered

The quantity of rain rainfall in Ecuador depending on climatic zones (Costa, Sierra and Oriyente) fluctuates within 200-5000 mm a year [4]. In this work the analysis of long-term series of observations of meteorological stations in the province Manabi during the period from 1963 to 2013 is made. When lengthening short series of observations the method of orthogonal regression was applied. Isolines of rain mean annual rainfall are as a result built and their average annual volume, important in the field of design of hydraulic engineering constructions for system of water supply is determined

An automated system for measuring the diffraction efficiency of light, as well its kinematic scheme, were designed and assembled. The measurements of the diffraction efficiency of light on the sample of polymeric substrates with periodic microrelief were carried out. The software is developed in Matlab environment for the construction of the diffraction pattern of the geometric parameters and wavelength. By using software as well as the results of measurement of the light diffraction efficiency the microrelief period was determined too. The correctness of the period was checked by an independent method

The paper is devoted to principal elements preliminary identificated of gold mineralization prospecting model of the prospective area Southern within Sredne-Ishimbinskaya area (central part of Yenisei gold province). The results of the comparative analysis of the object of research with known gold deposits of the Yenisei Ridge are presented

The work analyzes the world’s methods of extracting natural gas from the solid gas hydrates, as well as disadvantages that arise when using these methods. The examples of natural gas extraction from gas hydrates methods depressurization, heating and the addition of an inhibitor. Considered such difficulties as the gasifying gas hydrate spontaneously pressure reduction or temperature increase, and the fact that the pressure reduction without heat input leads to endothermic cooling

The article analyzes the innovative technology of improving heavy oil recovery from heterogeneous oil reservoirs of Tatarstan by using SAGD technology through horizontal wells.

The article reveals the main factors affecting the architectural and planning decisions in the design and construction of recreational and medical facilities. Formulated research objectives in order to identify architectural solutions in the construction of new recreation facilities and health in Angola. The most rational location for the construction of recreational and medical facilities Angola

The article describes the increasing role of small businesses in Mongolia. The authors present classification criteria of national enterprises of small and medium-sized businesses and show their dynamics

This work presents new methods of the «Descriptive geometry» course, based on geometrical image and comprehensive drawing imitating videos