SCIENCE & EDUCATION

Consider the forces of internal and external resistance to the movement of tracked vehicles in the snow. There are shown the dependence of the resistance to movement due to vertical deformation of the snow tracks, including a resistance force due to the deformation of the snow under the track roller with the highest peak pressure, the drag force due to the additional deformation of the snow, extruded into internal space between track rollers. The expressions for the case bottom pressure heads in the snow, the value of the bottom case immersion in the snow, the resistance forces due to interaction with snow cover the case bottom. It is shown that this resistance is composed mainly of expenses for the vertical deformation of the snow and friction the surfaces on the snow. There are given a graph of components of the resistance movement depends of the snow height.

This paper presents the bees algorithm into global multidimensional optimization problem. We state biological foundations of the algorithm, shame of used method version and structure of corresponding Python program. We present also results of wide parametric investigation of method efficiency. The investigation carries by help of multidimensional test functions, which belong to three function sets - single-extremum functions, multi-extremum functions having not many extremum, multi-extremum functions having a lot of extremum.

Computing and its development sets up the range of questions on the most part from which answers either are incomplete, or unknown. Some of them: what is ‘computation’? What is ‘information’? What is possible to learn, using computing? What cannot be learned, using computing? – have fundamental value. In the present work the main attention is given to finding-out of technological features of computations with objects. Their interaction is considered in applicative environment that allows finding out the internal structure of usual operations which knowledge allows understanding of their properties. The choice of initial constant entities, considered as primary and referred as combinators is discussed. These initial entities are used as the basic “building blocks”, entering in applicative environment in interaction with each other. This interaction results in the constructs, giving representative sets of usual operators and to the embedded computing systems

In article the new approach to modelling of parametres of the human muscle describing a condition of a muscle (weakened or strained) is offered. The universal curve gives possibility to compare various muscles in relative units, as

In this paper a software environment is proposed for the semirealistic simulation of airborne strapdown inertial/satellite navigation system sensor measurements. In contrast to the existing ones, the suggested environment is capable of automatic error model parameters identification for gyros, accelerometers and the GNSS receiver after the system is tested onboard a land vehicle.

The problem of multidimensional non-stationary signal classification is considered. The method of signal feature vector construction based on analysis of dynamical patterns is described. The neural network approach is proposed to use for classification in feature space. The results of experimental researches of developed algorithms for applied problem of electroencephalograms recognition are described.

It Is considered models and algorithms for semi-structured decision making in ill-defined initial information using fuzzy analogues of known criteria: Bayes, variance, Wald, Savage, Hurwicz. An optimal strategy dynamic decision-making process. The results of computational experiment designed to study the proposed algorithms for decision making on the example of evaluation and selection of suitable varieties of cotton. Results of computational experiment show that the technique improves the efficiency of selecting varieties with the best rates on yield at the lowest cost of labor and resources to grow.

This paper presents some results of our investigations in area of ontology knowledge base. These investigations have methods development for support decision-making into corporative information system as a goal. We use the models of semantic networks of ontology knowledge base and ontology knowledge a document of this base as the weighted multi-graphs. A number of these networks metrics is introducing. The metrics are base on topology behaviors of these graphs. On foundation of the metrics, we realize clusterization of semantic network of ontology knowledge base. Next, we define the weights of the multi-graph nodes and its arcs of this network. Finally, the paper presents a number of concept importance measures into semantic networks of knowledge base. The measures can use to estimate relevance of database queries.

This article describes the method of 3^rd grade Bezier curve approximation of turboshaft engine compressor blade’s profiles using the gradient descent optimization method. Also a process of creating a user function modules within Unigraphics NX environment is described

The article discusses the problem of choosing a rational product assembly sequence. Means to solve this problem are focused on technical systems with a predominance of mechanical linkages: machinery and mechanical appliances.

It’s introduced the concept of combinatorial type matrix. The systems of linear equations and inequalities with such matrix are considered. It is discussed cases of incompatibility of such systems, the interpretation and possible ways to resolve the problem of inconsistency are proposed. The application of combinatorial systems in problems of classification is given

In latest time planetary screw drive mechanisms to avoid edge contact mating thread turns their details have modified the thread on rollers. Profile revolutions shaped rollers are made, performed along the arc of a circle. Most of the details after the production exposed process ofbreaking-in , which changes its initial profile. On the profile loop of roller’s thread  is formed straight section approximately in the middle, the starting and ending points are the points of the initial contact of mating thread turns. A similar profile loop of roller’s thread  formed in process of exploitation  by reason by deterioration. This article describes the mechanisms of the new, proposed modification of the thread of their parts. They differ from the known simplification of manufacturing technology, increased load capacity and axial stiffness, which remained stable throughout the resource.

The dependence of estimation of resolution on the type of interpolation at scaling is obtained. The application effectiveness of the different algorithms of interpolation at scaling during interpretation of digital images of test bars is in details analyzed.

New adaptive trade system for stock market was developed. Its parameters are changed as far as new share prices information is received for maximizing its profitability by given level of risk. The distinctive feature of this system is long periods of trade position retention. This article could be useful for economists and traders, engaged in development of adaptive trade systems.

The paper considers a question of  interaction of  basic draft elements of a mover with a surface of driving, in particular, the road resistance inside of  driving wheel from the excavation and the bulldozer interaction and milling of the material of a covering of a road in a zone of contact of an elastic mover with deformable road-ground foundation. Input the concepts of the excavation and the bulldozer effects inside of  driving wheel. The article include a concepts of conditional tread which consist of the front tread of the wheel, the tread from the snow mutilation inside of driving wheel and the tread from the snow milling by wheels lateral grouser in sideslip. Proposed dependences can draw a conclusion about the road resistance growth and describe of the process of the wheel rolling.

Heavy graphic systems (CATIA, UNIGRAPHICS, Pro-Engineer), and modern systems PDM and PDL (ENOVIA, DELMIA, etc.) incorporate the various means, allowing to simulate behaviour of working executors or pilots on the workplaces (on the conveyor, at machine tools, in a plane cabin, in car salon and so forth). Such imitation allows to define more full, for example, ergonomic characteristics of the designed workplace of the pilot, or visually to show occurrence of possible turns on processing in the course of assemblage on the conveyor etc.

The article is devoted to the matter of description of production systems’ structure while solving the tasks of selection of the optimal specialization direction. The system is represented as a complex of elements fulfilling certain actions: receipt, storage, relocation and transformation. A possibility of description of various level systems is shown. Examples of such systems’ elements are stated.

A direct adaptive method of multicriteria optimization based on neuro-fuzzy approximation of decision maker’s function is considered in this paper. Some results of the investigation of the efficiency of the method for solving two- and three- criteria test problems are presented.

In article the essence and the maintenance of space activity are considered, its classification, the basic aspects of space activity as много¬уровневой structures is resulted, the legal status of space activity in the Russian Federation reveals. The special attention is given to a role of the space information in modern conditions and the interrelation of space activity and information safety is shown.

This article is dedicated to the description of the process of development of the interaction between the contacting turns of threads in the planetary roller screws. The following cases are investigated: the interaction between roller and screw; and the interaction between roller and nut. The model serves as a basis for all further calculations of the wear resistance of the roller screws, that is a major criterion for their outage. The result was achieved in accordance with the outcome of the high-accuracy measuring of roller screws’ thread shapes and some theoretical development. The derived model permits to account for the intensive tear and wear of the turns of the threading in the details of the roller screws