Nowadays, the main way to improve power density is increasing the junction temperature of semiconductor devices and as a result, increasing the temperature of the heat sink. This results in a lower efficiency due to the high temperature caused by increasing power losses. To solve this problem, it’s possible to develop the heat sink for a specific system, or to optimize existing heat sink profiles. This paper presents an FEM-analysis describing thermal behavior of a bidirectional switch used in a direct matrix converter.

Keywords: bidirectional switch, heat exchange, thermal behavior, finite element method

For the separation of conductive and non-conductive non-magnetic materials are used electrodynamic separators with permanent magnets and electromagnets. One of the ways of intensification of the process of separation is to increase the magnetic field strength in the separation zone. When separation of fine fractions, the problem arises of reducing the pole pitch of the magnetic system, which reduces the influence of magnetic field on shared materials. In this regard, there is a need to conduct research on the development of highly efficient magnetic systems.

Keywords: electrodynamic separation, magnetic system, permanent magnet, pole step, the electromagnet

Studied mobility planar four-link mechanism of the manipulator in a predetermined area of the workspace. A method for determining the maximum rates for selected destinations for the mechanisms of manipulators with motor redundancy.

Keywords: own properties mechanisms manipulators, mobility manipulators, robots for the synthesis of movement velocity vector

There is discussed an influence of n-p-n HBT scaling on its RF performance in the article. The behaviour of cut-off and maximum frequency of DUT at the transition from 0.18 um down to 0.09 um BiCMOS technology is demonstrated, its dependence from construction and technological variations of the heterojunction bipolar transistor, as well. It was shown, that the approach called "direct" scaling appeared to be inappropriate as a frequency-increase method and some constructive and technological recommendations were discussed, including Ge profile shape, impact of deep collector implantation dose and cap-layer thickness.

Keywords: silicon-germanium, SiGe HBT, BiCMOS, RF performance

The material provides an analysis of cross-cutting issues of tactics of interrogation of persons with mental disorders; The author focuses on the fact that investigated the problem is quite complex in terms of legal, criminological, criminal law, medical-social and psychological aspects. The purpose of research - the study of tactical and procedural features of interrogation of persons with mental disorders. Methods. The methodological basis of the study constitute a universal method of knowledge, reflecting the dialectical relationship of theory and practice, as well as other proven methods of scientific research: the method of theoretical analysis of the sources of the problem, analysis and synthesis, induction and deduction, sociological, psychological and statistical methods (study and analysis of the content of the materials criminal cases and statistical data, questionnaires, survey). Results. Thus, analyzing the modern ideas of scientists and practitioners concerning the use of the terms "mental disorders", "mental illness", "mental deficiencies" and so on., We can conclude that it is more correct to use the term "mental disorder"; defects psyche available to all categories of persons under interrogation, it is a very complex and diverse phenomenon and should be the subject of study sciences such as criminal law, process, criminology, criminal law enforcement, forensic psychiatry and criminology; legal psychology.

Keywords: interrogation, interrogated category interrogated, mental disorders, mental defects, types of examination, symptoms of mental disorders, ability, disability

In article the design of shutoff pipeline valves of bilateral action which thanks to existence of the compensation camera connected by the channel with an internal cavity of the device possesses high safety in operation at the expense of an exception of probability of a rupture of the case and a cover, expression of a working environment of an internal cavity of the device in environment through consolidations under the influence of excessive pressure in an internal cavity is described.

Keywords: valve, main pipeline, pipeline fittings, pipeline transport.

The possibility of increasing the production of vegetables by different methods of preplant treatment of seed as an example of culture of a cucumber. The technique of obtaining a mathematical model describing the dependence producing vegetables on the methods of preplant treatment. The resulting mathematical model allows the company to forecast prices for the products and the distribution of income of the agricultural enterprise.

Keywords: Vegetables, seed mixture, pre-treatment, nutrient solutions, the electric field, productivity, mathematical model, normal distribution, the theoretical curve, the experimental curve, time series, yield and production

The paper describes distinct types of problems of generating surfaces by rolling. An algorithm has been developed to find a conjugate point, which became the basis for a procedure to determine the profile of a conjugate element, the procedure being the main one for a number of problems of surface generating by rolling for different types of elements.

Keywords: profile details, tool profile, rack, gear wheel, poloide, rolling, contact point, conjugate element

Importance of cooperation of universities with machine-building enterprises from the point of view of an intensification of creation of objects of intellectual property is shown in article. The description of the valve design developed by authors for the main pipeline which allows to provide compensation of excessive pressure in an internal cavity when finding a lock in a closed position and heating of the case of a valve is given. The described design of a valve can be used as shutoff valves on pipelines of nuclear power plants, thermal power plants, main oil and gas pipelines.

Keywords: valve, main pipeline, pipeline fittings, pipeline transport.

The article reflects the modern problem of logging process relating to the development of hard-to-forest areas. A perspective for the development of hard-to-forest areas. Given the basic logistics for transporting wood using airships. A mathematical model to describe the performance of the airship to transport timber.The proposed mathematical model to determine the performance of airships in the development of hard-to-forest areas allows: to evaluate the effectiveness of airships in the development of different types of forest areas, choose the best option in the logistic scheme of transportation of timber, and therefore choose the technological equipment, to an economic assessment of the transport component of the timber with airships.

Keywords: Airship, wood transport, processing equipment, productivity, cycle time, logistics

The purpose of this work was to study the influence of the structural and geometric parameters of the twist drill on the quality of the processed hole and productivity of machining the high strength polymeric composite material – glass fiber epoxy-based plastics that are reinforced by titanium foil. In the structure of high loaded polymeric composite parts the reinforcing layers made from the titanium foil are used. These titanium layers are placed between layers of the winding unidirectional glass fiber tape or the carbon fiber tape. In order to reach the required dimensional accuracy, the macro- and micro geometry of the hole surfaces, to eliminate the overheat, burning, and delaminations of material, need to use sharp-edged tools, which wear out quickly, and remove the drill from the workpiece at frequent intervals to clean the chips from the flutes of the drill and the hole being drilled. We studied the drilling of glass fiber reinforced laminates at the different schemes of sharpening the drills made from the high-speed steel. We present some experimental results of the optimal feed and speed for the studied twist drills, the dependencies of the highness parameters of roughness, and also characters and degree of delamination at starting and finishing hole for the different tools, feed and cutting speed.

Keywords: GFRP, drilling GFRP, delaminations, double-angle sharpening

This paper presents the features of the simulation model using, the describtion of the simulation madel of the system of the number of passenger cars in the city road network forming process. The author views the mathematical models of the laws, the simulation model of the process and its accuracy testing.

Keywords: simulation model, mathematical model, number of passenger cars, the city road network

Currently, special transport service airports are faced with the problem of rationing of fuel consumption of snow-removal equipment. This article presents the results of analysis of the structure and size of the park services, special transport Russian airports. Shows a diagram of the formation of fuel under the influence of factors of air temperature, precipitation and achievements attachments. View and mathematical model of the factors influencing fuel consumption. The mathematical model of the influence of factors on patterns of consumption. It is shown that the final model of the fuel consumption rates. The values ​​of actual fuel consumption of a special vehicle airports, the value of approved standards and values, computed by a mathematical model.

Keywords: Fuel consumption, special purpose vehicles of the airports

ECE Regulation №66 allows to use computer simulation to determine the durability and passive safety of buses in the rollover conditions for approval. The most common method of computer simulation is currently the finite element method (FEM). Simulation of contact interaction using FEM has several assumptions that are shown in the article. Since the bus is contacted with the rotating platform during rollover, assumptions in contact interaction modeling can lead to errors in load conditions determining and, as a consequence, inaccurate values of the bus body deformations can be obtained. Therefore, authors developed a mathematical model of bus motion, which occurs before the impact with the ditch surface. To confirm the accuracy of the systems of differential equations, the comparison of the results of mathematical modeling, FEM simulation and experiment using separate bus section are provided in the article.

Keywords: mathematical model, finite element method, passive safety, bus body, deformations, rollover, ECE R66, planar motion, experiment, load conditions

Analysis of ways to enhance the intensity of the heat radiator sections of the cooling system of diesel locomotive. The technique and results of experimental studies of heat exchange in the condensation of steam inside the radiator sections of the locomotive.

Keywords: radiator section, the locomotive, the coefficient of heat transfer, heat transfer coefficient, condensation, experimental study

The universal computerised complex for determination of quality characteristics of a dispensing of seeds by the apparatus of precise seeding is observed. The processing method of loggable signals is presented. The observed complex, with application of a metering equipment and a processing method of the data, allows to size up quality of operation of the sowing apparatus of precise seeding. In particular to define allocation of feed of seeds to which refers to droppings, one-piece feeds, two-piece feeds and feeds of the higher order. Also by means of a complex registration of amount of dosing elements and total of the gived seeds for experience is simultaneously led.

Keywords: seeding, dispensing, sensor, registration, sound card, signal, dropping, feed, seeds, sowing apparatus

Abstract: Operation of motor transport and special equipment is carried out in difficult conditions, the impact of environmental conditions (temperature, humidity, dust, wind, solar radiation) and changes in modes of operation of the machine. This affects the performance of equipment, the number and complexity of repairs. Away from fixed bases (in the field), the problem is particularly acute repairs. One of the most energy-intensive and expensive works are welding (welding parts with a break, welding cracks, fusing metal layer on the worn surface, metal cutting). In this work the welding equipment affect the voltage drops in the supply mains, therefore, produces a large number of failures such equipment. After the equipment is accompanied by an increased amount of electric power consumption, this results in material costs. Previously proposed equipment has improved mass, which reduces the efficiency of the welding. Based on this study was proposed innovative design welding inverter using the resonance effect, with enhanced reliability, low-cost design version (in terms of mass production). In order to improve the reliability and reduce the cost of the proposed design of inverter proposed a number of new approaches. Full-bridge inverter is studied welding power source with the implementation of the resonance effect with a stable and smooth operation, high reliability, because the circuit of the inverter is not sensitive to changes in the supply voltage.

Keywords: construction machinery, parts, low temperatures, thermal state, measurement, monitoring, control, sensor, hardware-measuring system

based on an analysis of the methods and schemes snow removal from roads and sidewalks it revealed that there is a snow plow, which would be cleaned in a single pass only the side of the road in the middle of the road cleared. At the same time to solve this problem are also two cars. In accordance with this work set a goal: increasing productivity snowplows. To explore this issue were based on the analysis of working bodies of snow plows developed and investigated a new type of dump actuator for snow removal from roads. It was determined that there is an additional resource to increase machine productivity. This is achieved by improving the design of the working body. This will not increase the resistance of the machine, because proposed symmetrical design with rotating blade and sliding half, which will reduce the resistance and to ensure stability.

Keywords: snow machine, snow removal from roads, snow removal scheme with roads, blade, working body

An experimental study of influencing of power supply voltage on characteristics of arbiter physical uncloneable functions (PUF) is presented. Arbiter PUF was implemented with 0,18 um CMOS process of JSC «MERI and Mikron». It was found that systematic process variations negatively impact on PUF uniqueness. Reducing the power voltage to threshold voltage levels improves PUF uniqueness. Besides, precision of power supply noticeably impacts on PUF robustness.

Keywords: integrated circuit, identification, physical uncloneable function, arbiter, Arbiter PUF

We examine how stem taper and the nonuniformity of bark along the trunk affect the efficiency of bundle mechanical decortication in drums.Such decortication enhances the performance of timber-preparation facilities.We demonstrate that the decortication of fast-taper longwood assortments may result in uneven barking along the trunks.Therefore, improvement of the technological process of longwood drum barking will diminish the offgrade portion of the chip and thus will result in better rates of competitiveness.Long size logs are often bent in barking drums. Further studies should take into account the resultant alternating strain in the bark, including stretching and compression. It also appears important to examine the effect of negative temperatures and bark moisture content on the resistance of the bark to the combined effect of stretching, compression, and impact shock.

Keywords: bundle barking, stem taper, barking quality, barking drum, long-cut timber barking, bark.

In the article the work of the new local station "9 km" of the Krasnodar region and possibility of its use as the distributive terminal on approaches to ports is estimated. Shortcomings of a technical equipmente of the station are revealed and offers of technological character on elimination of consequences of these shortcomings are given. To exclude formation of trains to station Novorossiysk and to carry out a selection of ship parties at station Novorossiysk as by 2020 routing increase is predicted. In this regard, power is released, which is confirmed by the graphical modeling. To postpone the formation unloaded in the port of Novorossiysk cars to the station Krymskay to free station 9 km. To improve the planning system and to establish the liability of the participants in performing tasks to unload cargo. Special attention on solving the problem is given a multimodal logistics center, the activity of which is the use of information computer technologies. Besides offers on realization of polygon technology, as one of ways of improvement of operational work of railway transport are given.

Keywords: Distributive terminal, technology, shortcomings, redistribution of a traffic volume, system of planning, logistic center, polygon technology

This article presents the results of studies of the reliability of the wheel bearing of the car VAZ-2190. Represented the company on the basis of which was made the collection of statistical information. The urgency of the research. Provide estimates of the reliability of the wheel bearing. The revealed dependence of the reliability of the bearing depending on mileage with the performance of the resulting graphs. Proposed recommendations to improve the frequency and changing the test object. Presents the findings of research. The ways for further research.

Keywords: repairs on an actual technical condition, repair works, pre-diagnosis, optimization, multidimensional taxonomy, the Manhattan metric

The article analyzes the market of tires used in hybrid automobiles. Presents the results of 2014 the Russian market of tires. Estimated share of Russian and foreign manufacturers, which placed the production in Russia. Examines the import and export of tires in Russia. It is predicted the market situation in real terms.

Keywords: The operation of the vehicle, all-season tyre, wheel, market analysis, import and export of tires

The article developed requirements for the personnel of the enterprises of motor transport. Distinguish the main purpose of the evaluation staff of the service center. Main demotivators efficient staff. Examines the factors affecting the reliability and performance of staff in real working conditions.

Keywords: The operation of the vehicle, staff, road transport, reliability, motivation of staff, failure of the system

One of the conditions of reducing the transport work cost is management of the automobile elements life on the basis of objective standards. In the conducted research, forming of the automobile elements life, according to seasonal variations of operational rate and conditions, is considered. A method of correcting coefficients determination was developed; it was based on estimated deterioration for each month, derived from the average deterioration rate of the friction linings and automobile running per month. Calculation of correction factors was carried out with the use of the imitating model. The obtained results allow modelling the braking system elements life, taking into account seasonal unevenness of requirement of them. Using that information, it is possible to correct spare parts requirement and, accordingly, to reduce cars downtime while waiting to be repaired, as well as volume of stocks.

Keywords: the specification of the resource, resource generation, and seasonal variations in the intensity of use of the vehicle, correction specifications resource braking system of vehicles