The problem of cultivation of sturgeon kinds of fishes stands very sharply now. It is con-nected basically m by that despite of interdictions and assessed penalties uncontrolled catching of valuable breeds of fishes from a river basin Don is made practical. Factories existing nowadays on reproduction of fishes carry out the activity basically for reproduction of a commodity fish, that is don’t support a livestock of a fish in a habitat of dwelling. Therefore the strict measures directed on preservation of number of a population of sturgeon kinds of a fish are necessary.
Keywords: Main words: The control, cultivation of a fish, ways of cultivation, specifications
The question of increase of efficiency of the cooling process in the compression refrigerating machines and household refrigerating appliances. Describes a new original method of cooling of the condenser vapour-compression refrigeration machines, which is due to wet the surface of the capacitor with its further blow. Shows the complexity of the theoretical analysis of the proposed method of cooling and substantiated the necessity of experimental studies of the process of cooling of the refrigerant in the capacitor.
Keywords: compression refrigerator, evaporative a capacitor, a new method of cooling refrigerant, energy performance, the efficiency of the cooling
Examines the historical stages in the development of the theory of systems research management of the uncertainties, the reasons for they arise in the mathematical model, this is reflected in an interval values in the transfer function of the object of control. It is proposed algorithm for obtaining experimentally the interval of values.
Keywords: interval values, robust stability, the transfer function, parametric uncertainty, a mathematical model of the management system
"Assessment of ecological safety of construction materials at all stages of their existence from a pit before utilization. Drawing up of ecological passports on materials, details, products. Need of the analysis of ecological safety of existing construction and finishing materials for forecasting of possible ecological risks. "
Keywords: environment, negative impact, construction materials, ecological passport, ecological safety, reconstruction, new construction
When using the prediction in the control of the rotational motion is necessary to construct two smooth trajectories passing through the previously measured its nodal points. As a piecewise polynomial curve that provides the desired smoothness, consider interpolating cubic splines, which are between nodes represent a cubic parabola, continuously connecting the nodes with the smoothness of degree 2. In imposing additional boundary conditions, these splines minimize its total curvature.
Keywords: Interpolation splines, management tasks, prediction algorithms, kinematic characteristics, Hermit splines
Results of the flight research spent in April - among students of RSUCE are brought May, 2012. The Main objective of research - definition of the emotional relation of students to local and central political orders. Primary data are received by questioning on a method of semantic differential. By the received results semantic portraits of four types of political usages (two ideal constructions and two above-stated real orders), relative distances in semantic space between images of these usages are defined. That has allowed to calculate levels of emotional perception of local and central political usages in linear approach.
Keywords: questioning, semantic differential, affective component, group installation, political order, level of emotional perception
The article describes the best ways spline interpolation trajectories of angular movement in the key points for solving motion control rd to the prediction of the external load. As benchmarks we examine the accuracy of the approximation of the drive and the complexity of calculation of coefficients of splines.
Keywords: Trajectory, Lagrange splines, splines Ferguson, interpolation
The article is devoted to the mathematical modeling of the plant`s development. The graph theory is used to model the plant objects with different types of branching and its growth.
Keywords: model, the plant object, stem, directed graph
In this article considered the questions related to the strength of normal sections in reinforced concrete beams, in which steel reinforcement is completely or partially replaced by a fiberglass rod. It was established that the strength of such beams is less, but the strain is significantly higher compared to the traditional reinforced. Calculating with current standards dramatically overstates theoretical bearing capacity of these beams with composite reinforcement
Keywords: concrete, reinforced concrete, strength, normal sections, steel, fiberglass reinforcement GFRP, composite materials, research
In this article considered the questions related to how the deformability is influenced in concrete beams, in which steel reinforcement replaced with fiberglass GFRP or a combination (hybrid). The latter is very important, as the current standards do not account the increased in strength of composite reinforcement, whereas its elasticity modulus is lower than the elasticity modulus of steel reinforcement.
Keywords: concrete, reinforced concrete, strength, deformability, steel, fiberglass reinforcement GFRP, composite, the modulus of elasticity, deflection
The main questions of tehnology and mechanisation process of construction of global system is considered. Movement of prepared connected tube system according the project makes by shifting of initiative sections.
Keywords: tube system, contact zone, self-construction, prospectivity.
In article questions of improvement of a technique and theoretical bases of electrocatching with reference to problems of fight against drop ablation in a working zone in the conditions of galvanic production are considered.
Keywords: electrocatching, drop ablation, working zone, barbotage, charge, drop
In article it is disscused ways of decrease in noise and realization of actions for decrease in professional risk of workers construction industry enterprises working under the influence of high levels of noise.
Keywords: industrial nois, professional risks,labor protection
Semicars, as is known, are a universal rolling stock. For today in RZD and in transport HIGH SCHOOLS of the country works of research character on regulation and operation optimization by a universal rolling stock are actively conducted. In article a task in view on optimum control empty cars of various patterns of ownership with use of a transport problem.
Keywords: Park of semicars, cars own involved (ВСП), empty a traffic volume, the First cargo company (ПГК), the Second cargo company (ВГК), and the basic plan
Currently most used energy absorbers can be represented classic spring-damper scheme in which the binding is the presence of the elastic work item and damper. Applied to seysmoudarnomu works best security systems installations are systems that do not have elastic elements. For hard metals, which are material for the work items absorber characterized by the appearance of a tooth during the deformation strength. For the calculation of the power characteristics of the work item should be modeled phenomenon associated with the formation of the yield drop. Modeling of the phenomenon of this article.
Keywords: Dynamic loading, uprugoplastichesky deformation, deformation chart, power absorption, tooth strength