The method of parametric modeling and design based on the example of a building is studied, the architectural image of which is a set of circular helical and cylindrical surfaces defined by coordinates through functions of the corresponding surfaces in the SAPPHIRE software. Alternative methods for specifying surfaces in the SAPPHIRE PC, AutoCAD with subsequent export to the LIRA PC for engineering calculations of the frame of the building for various combinations of loads by the finite element method are presented. The object of the study is a 360-meter-high building with a hardness core in the form of a cylindrical shell of revolution. The height of the floor is 3 m. Around the rigid shell there are three circular helical surfaces that "rise" in a spiral upward along with the core of rigidity to a mark of 360 meters from the level of the ground floor. One of the most universal ways to create a surface is to specify it through a formula, because you can easily change the shape and appearance of the surface without manually editing the geometry of the model in the drawing. The development of the parametric architecture calls for the creation of new approaches to the calculation of unique buildings and structures, the improvement of software complexes that implement the finite element method, and the appearance of new varieties of finite elements with curvilinear boundaries.

Keywords: parametric architecture, surface, shape of the object, shell, curve, model, geometry, program, formula surface, helical surface

The advantages of using self-compacting concrete in the technology of precast reinforced constructions that are manufactured on stands with a travelling shuttering were considered. Considering the significant heat losses on the heating of products in this technology, concretes have been studied that harden at low temperatures. It was shown that self-compacting concretes with consumption of 330-450 kg / m3 gaining strength in compression of 20-35 MPa for 16-20 hours at low temperature heating.

Keywords: self-compacting concrete, stand technology, travelling shuttering, disperse filler, superplasticizer, heat treatment, strength

Flat multicolor light rasters larger sizes can be used for orientation of the aircraft relative to the runway. In the case of the use of such light vehicles in the route and glide-path system (KGF) landing aircraft to increased demands. It should be reliable, efficient, weatherproof and safe. The safety of the pilot is of importance both from the point of view of security applications of KGF as avionics, and increasing psychological and emotional stress, and richness of information flows. As well as the reliability of the system is a guarantee of minimization of emergency situations, leading to the work of the pilot in a stressful condition when a person has reduced functional performance (reduced attention, drops his concentration), speed of decision making and actions can be reduced and, accordingly, affect the results of its activities. Despite the high level of automation of process of landing of an aircraft on the runway, visual perception a pilot environment remains a key in taking a final decision. A particularly acute problem when landing on small platforms, including on the platforms of shipborne. The sooner the pilot will visually assess the environment, the more time it will have for decision-making, especially in conditions of poor visibility and the presence of radio interference.

Keywords: the light raster, semiconductor lasers, galvanoscanner, line scan, frame scan, sector, raster geometry raster, route and glide-path system

The article analyzes the adaptation contour, which is an integral level of management of the body's hematopoietic system, aimed at optimal maintenance of the body's metabolism as a whole. It is indicated that for complex measurement problems it is advisable to use the principles of constructing measuring systems, formulated in terms of system functions using the fractal-categorical approach. It is concluded that the functorial and category maps make the analysis of the hematopoiesis process more complete and visual, and the possibility of further decomposition allows the researcher to carry out more detailed research, visually displays the processes of adaptation of the organism under external influences and naturally contributes to the construction of automated measuring systems for which the adaptive The contour is a model of the bioconverter of information on the processes of hematopoiesis included in composition of bioinstrumental measuring system

Keywords: structural and analytical method, information-measuring system, information flows, hematopoietic system, category diagram, functors, adaptation contour, bioinstrumental information-measuring system, control signal, measurements

The article identifies tasks that can be solved by robots for agricultural purposes. Held the problem statement for robotics irrigation machines (DM) type "Frigate" due to the fuzzy control of technological processes of watering, allowing you to control the irrigation rate during the entire irrigation season regardless of the various uncertain factors that affect the quality of irrigation. Proposed to be used by DM crane-preselection analog operation, working by electricity, the fuzzy will be managed by improved control system, as well as to enter into the system management subsystem diagnostics, including sensors for measuring soil moisture and slope of DM in different parts of the field. The mathematical model of fuzzy control irrigation machine due to the software regulation of water flow depending on the topography of the field, the speed of movement of the machine across the field and soil moisture to reduce water consumption and improve the efficiency of DM. As the fuzzy logic algorithm the proposed algorithm of Mamdani, which is easily implemented in MATLAB based on the knowledge and experience of experts, and simulation. Formalization of the description of the performance of the machine carried out with the help of linguistic variables, given the type and description of elements of term-sets of these variables. The proposed mathematical model can be used when designing control systems for other robotic farm machinery.

Keywords: robotic irrigation system, fuzzy control, mathematical model, algorithm of fuzzy inference, linguistic variable, term set of a linguistic variable, basic variety

To significantly increase the accuracy of measurement and the reproducibility of the results, a method has been developed for determining the decrease in illumination of filamentary LED lamps. The necessity and possibility of realization of the first reading of illumination in one second is grounded.

Keywords: filament lamp, illumination recession, method, error, criterial value, rate of decline

The compare the durability of the existing ball bearings (SHO) with the polymer homogeneous element with the durability of the modified supports, a cell model with the averaged placement of the modifier in SHO substrate and a model for bringing the multilayer sho body to the equivalent single-layer one are constructed; calculations of contact pressure, contact deformations and stresses are performed. The calculation takes into account the rheological and physico-chemical properties of the components of SHO substrate and modifier, the influence of the environment. As a result of calculations, it was found that at all points of the contour the material experiences a biaxial plane two-dimensional stress state, called pure shear with the presence of shear stresses. The most intense point of danger is the point lying in the center of the platform of contact of details.

Keywords: ball bearing, durability, modeling, polymer material, granule, modification

Up to now, the problem of recognizing printed characters of different fonts with high speed and reliability is not solved. The team of authors carried out research of images of printed characters of different fonts for the purpose of revealing the signs necessary and sufficient for recognition of signs by a computer. These features were a certain combination of directions, formed by elements of the contours of signs. According to the developed program for the computer, the image of each printed character stored in the computer's memory device was scaled up, uncharacteristic signs of signs, certain defects were eliminated and the contour of the sign was highlighted. The contour was represented in the form of a sequence of definite directions formed by its elements. All printed characters of the Russian alphabet of different fonts were recognized by a certain technique, despite the different types of printed fonts, for certain possible defects.

Keywords: printed sign, direction, standard view, recognition, outline, font, tag, serif, reading device, information

In this paper, we consider the task of constructing a work plan in the form of a chain of control actions that change the system, and methods for solving it. The problem of finding the optimal path on the situational network is constructed with a mathematical description of the initial conditions and the requirements for the result. Briefly describes the standard solution of this problem: the method of fuzzy products. The main problems of the fuzzy product method are considered. The solution of the task of constructing the chain of actions of an operator on a situational network using the dynamic programming mechanism is described. A combined method is proposed for finding chains of actions with procedural construction of a situational network using the dynamic programming method with constraints. The first step and step l of the algorithm for solving this problem are described. The advantages of this method over other.

Keywords: situational modeling, fuzzy sets, graph theory, decision theory, documentation, complex systems, fuzzy logic, fuzzy situation networks, set theory, optimal control theory, dynamic programming

The article is devoted to the problem of using artificial neural networks as one of the methods of data mining (intellectual data analysis) for classifying the competencies of university students when determining the educational specialization. It describes the complexity of the process of selecting specialization and the associated negative consequences, as well as an approach to solving the given problem using software classification tools. As a basis for the implementation of the proposed tools, the student's information system is used on the website of the University of Tartus, Syria. The article presents data selection criteria to form the training sample, which includes the academic performance in some courses as input vectors. The values of the output vector depend on completed specialization and it get into the training set only if it is properly selected. On the basis of these data, the structure of a multilayer artificial neural network is formed and the learning algorithm is selected, the results of which are reflected on the university's website in the form of advice on the choice of future specialization, which has allowed increase the effectiveness of the educational process.

Keywords: Data mining, artificial neural network, web-design, machine learning, classification

The article considers theoretical bases of technological process for modified wood production for sleepers manufacture. Currently, sleepers are made mainly of natural softwoods, the stock of which is severely limited. In addition, sleepers made of natural wood have short wear-life. In this connection, there is a need to create a new high-tech resource-saving production of railway sleepers from modified wood by impregnating it with antiseptic and stabilizer compounds and carrying out thermal and mechanical modification of wood. For this purpose, a systematic analysis of physical phenomena underlying the technological operations has been performed and on the basis of which the curves for workpiece heating along cross-section in an oily liquid based on similarity criteria has been theoretically calculated, and on the basis of the physical phenomena of heat and mass transfer the duration of workpieces drying has been calculated. Methods of impregnation, loading and depressurization during pressing have been got. Based on system analysis of physical phenomena and performed calculations, structure and regimes of technological process for modified wood manufacturing have been developed.

Keywords: modified wood, drying, impregnation, pressing, antiseptic, moisture, stabilizer, physical and mechanical properties, sleepers, wood modification technology

The paper presents an analysis of the processes of formation and processing of vegetable waste. An assessment is given to the existing ways of processing woodworking wastes and their inefficiency is justified. A new kind of resource and energy-saving grinding set of disk mills is proposed. On the basis of the analysis of the results of experimental research, the effectiveness of the use of the proposed method for the production of wood fiber is substantiated.

Keywords: abrasive set, grinding, efficiency, wood-fiber semi-finished product, specific fiber surface, wood pulp, defibrator, refiner, refiner, knife grinding

The purpose of the study is to develop a software – oriented algorithm for calculating flat rod systems with variable length modulus of elasticity. The object of study – a flat rod system, located in a single load, the elements of which are interfaced at the nodes rigidly or pivotally; the shape of the axes and the conditions of the support are set. A special finite element is developed on the basis of the finite element method in the form of a mixed method. To calculate the elements of the response matrix and the vector of freight coefficients, a numerical integration procedure is used. Examples of calculation of cantilever rods in two variants are given: with a variable length modulus of elasticity; and a rod having three, five and seven sections along the length made of different materials. The comparison with the results of other authors is given. A flat frame of four finite elements with variable modulus of elasticity is calculated. The results of solving the examples indicate the correct operation of the proposed algorithm. It is shown that the parameters of the stress-strain state of the structure can be adjusted by changing the properties of the material.

Keywords: mixed method, finite element, variable modulus of elasticity, response matrix

In work is considered numerical solution of a task about distribution superficial waves in a liquid layer on the porous basis. Expressions for the decrement of attenuation and frequency of fluctuations of a wave are written. Dependences of frequency of fluctuations of a wave on dimensionless sizes are shown. Various special cases are considered. The dispersive equation for the infinite thickness of a layer of the porous environment is written.

Keywords: porous environment, frequency of fluctuations of a wave, decrement of attenuation of fluctuations of a wave, rhombohedral packing of balls of the porous environment

The paper deals with statically determinate and statically indeterminate reinforced beams of a rectangular cross-section of bimodule material loaded with a uniformly distributed load. Since for heterogeneous materials, the elastic modulus for tension and compression are different, the work aimed to study the influence of different boundary conditions in statically indeterminate beams on SSS. It is shown that the magnitude of the maximum normal stresses is less than the stresses found without taking into account the bimodule nature of the beam material, both in statically determinate and in statically indeterminate beams. The maximum normal stress and maximum deflection decrease with the transition to a statically indeterminate beam from a similarly statically determined beam by replacing the supports. The method used in work makes it possible to clarify the calculation of strength and rigidity, taking into account the bimodule nature of the material of the reinforced beams, and also to select the optimal fastening of the beams that ensure the bearing capacity of the structure with material saving.

Keywords: reinforced beam, heterogeneity, bimodule material, stress-strain state, normal stresses, deflection, statically indeterminate scheme, bearing capacity, strength, deformability