The current work considers the problem of arrangement optimization of non-convex polyhedrons into a minimal height parallelepiped container. The no-fit polyhedron based algorithm is proposed to solve described task. The no-fit polyhedrons are used not only for providing conditions of the polyhedrons mutual non-intersection but also for finding the placement points. The current paper provides the block diagrams and the pseudo code of the algorithm. Some examples and computational results are also given for public input data. 

Keywords: packing, no-fit polyhedron, non-intersection, optimization, arrangement

  Regularities of electrode position of zinc-nickel alloy in electrolytes containing colloidal particles electro-besieged metals are studied. Developed by the electrolyte, which allows to reduce concentration of the basic components in 2 times and to increase speed of process in 2,5 times.

Keywords: zinc-nickel alloy, colloidal particles, speed of electrode position

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

  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

  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

The effectiveness of environmental protection measures depends on the complex of ecological, economic and social factors. Estimating ekologo-economic efficiency of nature protection activity it is necessary to consider specificity of the enterprises being on the city territory, existing ecological conditions, and developed system of an accomplishment of city landscapes.

Keywords: efficiency, enterprise, assessment, costs, ecology, economy, benefits, activities, analysis, result

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.

  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

  The features of the construction of effective solutions to the problems of excitation of multi-media internal sources of oscillations. Examples of numerical calculations of the displacements and strains in the environment depending on the position of the source and observation point.

Keywords: many layers of base, internal source, harmonic oscillations

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

The model of increase of efficiency of the created system of transportation of a municipal waste is presented. Need for carrying out modeling and the actions connected with reorganization of system, because of possible increase in total expenses is proved at shift of positions of reloading stations of rather optimum points owing to local conditions of the territory of municipality.

Keywords: a solid municipal waste, technological process of transportation, two - stage transportation

  Optimization of cycles of development of decisions at management of the automated production is considered. Dependence of validity on option of the organization of process of development of the decision is considered. Statements of optimizing tasks for definition of distribution of time of obtaining the decision for various contours of management are given.

Keywords: optimization, management cycle, model, process of development of decisions

The paper was presented one of the major classification schemes of software reliability models. Consider other possible classification scheme, their relationship and interconnectivity. Studied most frequent methods and factors of software reliability. Shows the formula for calculating the reliability of some models.

Keywords: software reliability models, classification models of software reliability, software reliability factors, the formula for calculating the reliability of software

  Mathematical models describing the process of group wood barking in the barking drums are suggested.

Keywords: group barking, mathematical model, barking drum