In the article the distinctive features of the cargo car service are compared with the service servicing cars. Questions of an optimum term of carrying out of diagnostics of brake system of the lorry and qualification of the personnel of car-care center are raised. A comparative analysis of three types of stands for the diagnosis of the brake system of a car is carried out.

Keywords: Car, maintenance, diagnostics, car service, braking system, bench tests

In this paper, the temperature distribution from a point source of heat under convective heat transfer is studied. The Navier-Stokes equation describing the steady two-dimensional laminar motion of a fluid is solved numerically. The distribution of the temperature field of a heat-loaded point source is obtained under appropriate boundary conditions, supplemented by the boundary conditions for the flow velocity to equal zero on the paraboloid walls by numerical integration using the control volume method.

Keywords: Radiator protrusion shape, thermal conductivity, thermal apparatus mode, the temperature of the heat source

The action of the microwave field is used for drying, pretreatment and disinfection of grain. In all these processes, it is very important to control the change in the parameters of the grain layer. The use of sensors for direct measurement of temperature and humidity of grain and air is difficult. The microwave field leads to errors in the measurements, and therefore the possibility of an indirect control of these quantities is considered. For the indirect measurement of these quantities, a computer model has been developed. To develop a computer model, a system of equations was used that describes the exchange of heat and moisture in the grain layer under the action of the microwave field and convection. Some equations in the mathematical model are partial differential equations. To develop a computer model, these equations were presented in an operator form. The article shows how this procedure was used to transform the equation showing the relationship between the grain temperature and the microwave field, air temperature and moisture content of the grain. This approach allowed the use of computer software for analysis and syn-thesis of control systems. In this case the Simulink software package was used. Simulink - a model for the exchange of heat and moisture in a thick layer of grain, when exposed to microwave and air, was created using elementary dynamic elements of automation. When developing a computer model, a step-by-step method is implemented. The essence of the method is that the grain layer is divided into elementary layers. The output parameters of one grain layer become input parameters for the next layer. A complete model for the exchange of heat and moisture in a layer of grain consists of models of elementary layers. The results of modeling the change in the temperature of grain heating confirmed the adequacy of the model. The use of this model in the control systems of drying and processing of grain will increase the accuracy of control and regulation.

Keywords: drying grain, grain layer, grain moisture, grain temperature, drying agent, microwave action, heat and moisture exchange, modeling

the development of a network of logging roads and increasing the efficiency of its functioning is the most important factor in increasing the economic accessibility of forest resources and intensifying forest management in the regions of the European North of Russia. Substantial development of the network of forest roads is necessary to increase the availability of forests for continuous and selective cutting, thinning, reforestation. It is also necessary to improve the efficiency of the operation of logging road trains while exporting forests, to increase the degree of development of the allowable cutting area, to increase the level of forest fire safety of forests, and to prevent and extinguish forest fires.

Keywords: availability of forest resources, logging roads, timber road truck, local stone materials, road construction

In the paper, based on the linear equations of motion of an electrically conductive liquid lubricant for the case of a "thin layer", the continuity equation and Darcy, the exact self-similar solution of the problem of hydrodynamic calculation of a radial bearing with an electrically conductive lubricant is given. A field of velocities and pressures in the lubricating and porous layers was found in the work, in the following, analytical dependences were obtained for the main operating characteristics of a bearing with a two-layer porous coating on the shaft surface. An estimate is also given of the effect of the electrically conductive properties of the lubricant, the presence of a porous layer on the main operating characteristics of the bearing.

Keywords: Electroconductive liquid lubricant, radial bearing, permeability of porous layers, electromagnetic field

The analysis of publications and the results obtained in the field of dynamic behavior of inhomogeneous beams and rods based on foreign press materials is performed. The work consists of an introduction and six sections. The introduction discusses the relevance of the problems associated with the study of inhomogeneous beam vibrations. The second part is devoted to highlighting the achievements in the development and application of analytical methods. The next paragraph deals with various aspects, reflecting the variety of dynamic phenomena arising in geometrically heterogeneous beam structures. Results related to modeling of conical, stepped beams and rods having different types of geometric features are discussed. The fourth section considers the state of the art for dynamic problems for physically inhomogeneous beams. It is shown that structural heterogeneity can be associated not only with material properties, but also arise due to external influences, such as inertial and temperature loads. Considerable attention is paid to questions related to the effective use of structurally heterogeneous beams in the field of architecture, construction, robotics, aeronautics and other innovative fields. The sixth and seventh paragraphs give an overview of the existing numerical approaches for an approximate and reliable description of the dynamic processes taking place in inhomogeneous beams. Different industrial software packages are discussed that allow solving dynamical problems of beams with varying physical and geometric properties within a reasonable time and with a high degree of accuracy. In the seventh, the final part, much attention is paid to the application of the finite element method.

Keywords: dynamics, a beam with a variable cross-section, eigenvibrations, numerical methods, structural inhomogeneity, finite element method, functionally graded materials

This article considers the problem of managing operational processes of operators of complex systems using the example of the work of the operators of the Russian segment of the International Space Station. The structure of on-board documentation and methods of composing radiograms are described. The complexity of the astronaut's work with reference radiograms is indicated. The use of situational modeling tools and fuzzy logic in the task of controlling operational processes of complex systems is substantiated. A mathematical model of complex systems based on fuzzy situation networks is proposed. The problem of finding the path from an unknown situation to a graph describing the state states of the system is formulated. The initial conditions necessary for solving the problem are formulated. The requirements for solving this problem in the form of mathematical equations are established. A graphical representation of the given problem is constructed in the form of an oriented graph.

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

It is shown that sawmills in the Republic of Karelia use automotive, railway, maritime and multimodal transport for various exports in exporting sawn timber abroad. From the point of view of foreign trade logistics, the geographical position of Karelia predetermines the possible geography of export supplies and the mode of transport. In the article features of export deliveries of forest products by sawmills of Karelia by various kinds of transport are considered. It is shown that sawmills need to diversify supplies in the directions and always choose the best variant of logistics in order to reduce transportation costs and to avoid overstocking of warehouses.

Keywords: sawmills, logistics, lumber, transportation, and exports.

The article raises the questions of expert diagnostics of autorefrigerators in the conditions of car-care center. A decision tree was built with a low oil pressure in the engine. Identified factors affecting the effective operation of the refrigeration unit.

Keywords: Specialized transport, car-refrigerator, maintenance, diagnostics, car service, decision tree

In the article the analysis of the market of services of a car-care center of an average city is carried out. A selection of popular car repair shops is given. The market is estimated by the number of required posts and the market share of the services in the city.

Keywords: Car, maintenance, repair, market of services of car-care center, working post

In the article the analysis of technical and economic indicators of the auto enterprise is carried out. Expected indicators: coefficients of technical readiness and output; total vehicle fleet run; time in the attire; number of car-days; operating speed; income and expenses of the enterprise

Keywords: Road transport, technical availability ratio, output ratio, total mileage, operating speed, efficiency of work

The article is devoted to the analysis of trends in the field of human-computer interaction and promising methods of usability research. For the first time ergodesign is presented as a new direction of human-oriented scientific and project activity in the field of user interfaces designing. To assess the ergodesign interface, it is necessary to analyze at least four criteria that together characterize the external interface of the product and the interaction with the user: effectiveness, efficiency, satisfaction and aesthetic appeal. The methods of usability studies are considered, special attention is paid to the method of oculography (eye-tracking). The prospects of using the tracking method in addition to the traditional methods of usability research in ergodesign are shown by means of a special study.

Keywords: human-computer interaction, user interface, ergonomics, usability, ergodesign, eye-tracking

The number of programs for modeling and design of buildings is great and continuous expansion of industry of creation objects cannot be stopped by high technologies. The most part of Russia's origin companies pay attention to foreign products despite great presence of domestic segment on the market. In the article will be considered the domestic software package Renga and also underlined his own advantages over existing analogues.

Keywords: Renga, Renga Architecture, Renga Structure, BIM, design, modeling, building, program

The models of resolution of the main types of intrapersonal conflict are given. They are all connected with the choice of the object or action (equal or different valence) of two equiprobable (still attractive). The models were built in the discrete event approximation. It is based on the assumption that the opinion of the subjects about the usefulness of the objects undergoing random fluctuations at each step. Their attraction is the same only average. The second basic hypothesis is that the subject intuitively changes its assessment of the probability of selection after the change of the attractiveness. The transformation probability is modeled using Bayesian theory of decision-making. Numerical experiments showed the viability of such model. It is obtained that in the end, the situation with the choice of is permitted in one direction or another (equiprobable at the level of the final decision). The time resolution is inversely proportional to the width of the fluctuation of attraction. In the work it is also investigated the influence of evaluation by the subject of the significance of the objects. Obtained as a very low evaluation, and Vice versa, too high, hinder the resolution of conflict. The minimum completion time is achieved a little distant relation of the subject to the object (process) conflict. The results are as purely situational, specific significance, and the overall methodological. The presented models allow for an easy generalization to more complex cases involving a variety of factors influence and can serve as a basis for such studies.

Keywords: conflict, intrapersonal, simulation, discrete-event approximation, the fluctuations of attraction, the choice situation, probability assessment, Bayesian theory, decision-making, perception of the significance of the objects of the conflict

In this paper we present the method of detecting of low-rate DDoS-attacks on the http-services. A low-rate attack model in the form of a chronological series of events with an additive superposition of attack and normal traffic is used. The task of developing a method of detection of low-rate attacks is formulated as allocation of homogeneous groups (patterns) of the time series, based on pattern recognition models, and the subsequent construction of prediction model for each separate group.

Keywords: intrusion detection; low-rate attacks; denial of service, artificial neural network; networks security, pattern recognition

In this work, the impact of the impact of the loads on the work of the optical system of landing the aircraft on the deck of the ship is studied. The influence of a shock pulse from the landing gear of an airplane during interaction with the deck is considered. Also the deviation of the light beams of the optical landing system and the making of constructive solutions for ensuring the required values ​​of the beam deflection are estimated.

Keywords: impact pulse, optical landing system, automation of optical systems design, reduction of light rays deflection

In this article considered the solution of the problem of automated exam scheduling using a genetic algorithm. Proposed method takes into account a number of requirements, necessary to solve the exam-scheduling problem. In this work, in the process of creating initial admissible schedule of the examination session, special attention is paid to the sequence of examinations. To improve the quality of the obtained schedule, was used a genetic algorithm to minimize the number of violations of specified requirements.

Keywords: genetic algorithm, timetable, examinations, university, study group

The article considers the problem of using a professional risk assessment measures the impact of factors of the labour process on health status of workers. The analysis of occupational diseases and the relationship with working conditions. Recommendations for risk management aimed at reducing the negative impact factors of production environment and labor process on the performance and health of the employee.

Keywords: occupational disease, occupational risk, harmful and hazardous production factors, identification, conditions of work

The peculiarities of the activity of mobile car repair shops are considered. Mathematical models for determining indicators, taking into account the randomness of the receipt of requirements for maintenance and the duration of the services themselves, are proposed.

Keywords: mobile car repair shop, probability, criteria, complex indicator, efficiency

The article is devoted to the problem of data protection from interception as a result of the "man in the middle" attacks. The proposed technique for detecting these attacks is based on the analysis of the headers of transit packets passing through the default gateway. Based on the data obtained, a table of correspondence between IP and MAC addresses is constructed, for which software provides up-to-date and reliable information. The addresses of packets passing through the gateway are compared with the records in this table and, in case of a mismatch and impossibility of confirming the correctness of addresses in the headers of the channel and network layers, it is concluded that there is an additional intermediate node in the network that appeared as a result of the default gateway substitution. The article presents approaches to software implementation of this technique, describes the packet analysis algorithm.

Keywords: local area network, man-in-the-middle, DHCP-spoofing, ARP-poisoning, traffic analysis, gateway, network address, packet, ARP-table

In the article it is suggested to use the program Сalc to reduce the complexity of processing multiple measurements. Based on the developmented method, the accuracy of the functions used in Calc is investigated. The functions of the specified program are selected, allowing you to program the algorithm for processing measurements. The structure of the algorithm is presented.

Keywords: Metrological support, multiple measurements, processing of measurement results, Microsoft Excel, OpenOffice Calc

The article substantiates the necessity of obtaining the dielectric properties of grain materials for studying the processes of microwave convective heat treatment of grain. The shortcomings of the existing methods for studying dielectric properties in the study of a fluidized bed and suspended layer are described. A laboratory installation and an experiment on the investigation of a suspended grain layer are described. The results of experimental studies on the determination of the dielectric loss factor of wheat subjected to microwave treatment are presented. The results obtained for different material densities correspond to the general dynamics, but differ significantly in level. Thus, for a dense layer, which corresponds to a density of 660 kg / m3 in the humidity range of 11-30%, the dielectric loss coefficient varies in the range 0.18-0.42; for the fluidized bed (440 kg / m3) 0.06-0.15; for the weighed (220 kg / m3) 0,1-0,3.

Keywords: energy efficiency, the microwave field, thermal processing of grain, field modeling, direct heating, dielectric

This article determines the approach to the implementation of the role model in the implementation of 1C-Bitrix, shows the key approaches to implementation and their impact on productivity, allowing to determine the degree of influence of the role model and choose the most appropriate approach regarding the implementation of 1C-Bitrix. The urgency of research of influence of role model on productivity is grounded. The key factors of the construction of the role model affecting speed and productivity are considered. The criteria for measuring the performance of the role model are presented. The results of measurements of the influence of the role model on productivity in accordance with certain criteria are described. The result of the measurements is the analysis of the influence of the role model and the factors of its construction on the system performance on 1C-Bitrix.

Keywords: web systems, 1C-Bitrix, system performance, role model, distributed web systems, 1C-Bitrix system, web performance, role model impact, role model performance, role model implementation

Within the Tresca yield criterion and its associated flow rule, the stress-strain problem in an elastic-plastic thin circular solid disk is considered under a temperature field such as the yield stress of the material depends on the temperature. In the central part of the disk the temperature is homogeneous. On the outer boundary, the disk is subjected to uniformly distributed pressure and constant temperature. The objective of the paper is to determine the service conditions which allow to obtain the temperature in the central part of the disk and its radius such as the initiation of the plastic zone starts either from the center of the disk or from its outer contour. The elastic-plastic boundary is calculated, and the plots for stresses and strains are presented. To verify the solution, the equivalent stresses for permissible plastic regimes are investigated together with the stress vector hodograph . The algorithm of similar problems is developed. The validity of the usage of the Tresca yield criterion when the yield stress of the material depends on the temperature is discussed.

Keywords: mathematical modeling, elastoplastic body, plane stress state, piecewise linear plasticity conditions, plastic flow theory, thermoelastic plasticity

The article considers the possibility of creating distributed transmission and accounting networks for energy resources. The experience of different countries in creating smart networks was also analyzed and the effectiveness of such systems was evaluated. "Intelligent" systems allow you to distribute energy more efficiently for end users. In addition, "smart" systems allow you to track leaks, accidents, and theft of electricity. The problems associated with the deployment of smart networks are considered. The main features and problems of introduction of accounting systems of housing and communal services in Russia are given. The system of state information system of housing and communal services is considered.

Keywords: Housing and communal services,distributed network,"Smart" systems, Information system, energy resources