05.00.00 Technical science
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FRACTOGRAPHY OF OPERATION FAILURE OF THE LITING GEAR OF BULLDOZER
DescriptionThe nature and causes of operational failure of the all-metal hydraulic cylinder rod of a bulldozer were studied. It is shown that the main mechanism of failure was evolving in time metal fatigue, initiated by defects of the heat treatment for chromizing
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PHOTOVOLTAIC PLANTS: PROSPECTS, ADVANTAGES, DISADVANTAGES AND THEIR CHARACTERISTICS
DescriptionAnalysis of scientific literature has shown a promising direction in energy saving and in increasing of efficiency of power supplies remote from external networks in Russia is the application of solar photovoltaic power plants. The level of solar radiation on the territory of Russia varies widely from 810 kWh/m2 per year in remote Northern areas to 1,400 kWh/m2 per year in southern areas. We have revealed their main advantages and disadvantages of solar photovoltaic power plants, as well as the purpose, basic features, features selection and operation of inverters and batteries. We have also given a generalized block diagram of three types of solar photovoltaic power plants: autonomous, standby, network. The peculiarities of their work have been presented. To improve the reliability of operation of solar power plants we need to design them according to the modular principle. Modular aggregation has to be applied for stand-alone inverters, where the input and output filters, power electronic circuit and system voltage regulation and protection represent the functional module elements. It is possible to increase significantly the reliability of autonomous inverters and solar PV systems in the complex, using one-phase and three-phase transformers with rotating magnetic field in their design. The advantages and the disadvantages, the peculiarities of the solar PV plants discussed in the article will allow to develop their structural and circuit designs with improved maintenance characteristics in the future
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Description
Clause is devoted to a new contactless method of measurement of volume of round forest products without taking into account a bark. The method offered by the author consists of several stages. For realization of each of stages the author had been offered methods which analysis of merits and demerits has allowed to allocate the most preferable.
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Description
The influence of addition of boiled forcemeat of a squid to raw forcemeat on functional and technological properties of forcemeat is investigated. The formulation of forcemeat for formed semi-finished products of squid is presented. Periods of storage of formed semi-finished products of squid are substantiated
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Description
The concept of the formation of regional bio-energy systems based on energy forest plantations on the new technical and technological base in order to engage low productivity lands in the economic cycle
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FORMATION A STRATEGY OF SOCIOECONOMIC SYSTEM’S DEVELOPMENT IN THE RESOURCE-LIMITED CONDITIONS
DescriptionIn the article the structural model of the socio-economic system is presented as a management object. We have described the levels of creation of mathematical estimation model of the socio-economic system’s state, which on the basis of the aggregated estimation of management factors array allows selecting the primary purposes of socio-economic system’s development. The main socio-economic system’s processes in the production of goods and services are presented as complex activities. Determining methods for the modern market share occupied by socio-economic system, socio-economic system’s actual share offers on the region market, the demand for goods and services in the region, the amount of income from the activity by mathematical estimation model of the socio-economic system’s state are offered. The amount of the budget is defined as the sum of the socio-economic system profits from commercial activities and the size of public funding on the orders. Evaluation of resource support for activities described in the article is proposed. The way to solve the actual problem management - determining the socio-economic system’s priorities with limited material and financial resources is offered. We have also presented an algorithm of determination of aims of the development on the basis of estimation model of the socio-economic system’s state, foreseeing determination of external and internal factors on directions activity and forming of their aggregated estimations. The operative management in a socio-economic system allows us to react immediately to changing of key indexes of the systems and also allows using the limited resources rationally, which is very actual in modern economic conditions
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FORMATION OF SURFACE LAYERS OF NANOSTRUCTURED TINICO, STIMULATED WITH MECHANICAL ACTIVATION
DescriptionThis article presents a complex method of formation of the surface-modified layers of materials with shape memory effect, including high-speed flame spraying powders TiNiCo with a cobalt content of 2 and 5%, subsequent thermal and thermomechanical treatment, allowed forming nanostructured surface layers with a high level of functional and operational properties. It is shown that the TiNiCo complex processing layer allowed reducing the porosity of coatings and increasing the strength of adhesion of the coating to the substrate. Surface modification TiNiCo for optimal regimes allowed increasing fatigue life under high cycle loading by 30-40% and wearing 3-3.5 times. Based on comprehensive research metallophysical surface layers obtained new information on the nanoscale composition
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FORMATION MODEL OF INVENTORY REPAIR MANAGEMENT FOR LOGGING ROADS
DescriptionThe article presents the mathematical model and algorithm searching for the optimum amount in rates of repair materials. These solutions account for the dependence of the transport costs of repair on the volume parties. They include a wide range of changes in the cost per unit volume of material. Solutions provide an effective inventory management in maintenance and repair of logging roads
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Description
Ensuring sustainable development of territories and minimizing damages from the possible occurrence of natural and technogenic emergencies, especially those sparsely populated as the Republic of Sakha (Yakutia), requires the use of GIS technologies. For this purpose developed geospatial data base structure (GDB) which allows solving problems of monitoring and providing safe exploitation of potentially dangerous objects. Furthermore in the process of solving problems GDB takes into account natural hazards, assessment of technical condition of potentially dangerous objects and anthropogenic impacts on the environment
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AIRSTREAM FORMATION IN THE FEEDER CANAL OF A STRIPPING DEVICE
DescriptionThe article presents the results of experimental studies of airstream formation by drums in the working area of the stripping header. The parameters of the air flow, its direction of motion are determined; the graphs for the speed of the drum with a cylindrical surface, octagonal in shape, with adjustable tilt and fixed teeth are constructed