This article is dedicated to overview of additive technologies, Russia's place in the modern world of developing technology, a comparative analysis of existing technologies, made predictions about trends in the development of additive technology in our country
Keywords: additive technology, classification, 3-D-printing, machines, powders for additive technologies, selective laser sintering
The article considers a problem of the Russian financial market modeling and suggests wide classes of diffusion and jump models. The authors examine the adequacy of the diffusion models by means of quadratic variation analysis on the Russian financial market, which is used to construct the volatility index, the most important quantitative risk indicator in the financial market. It is shown that the existing volatility indexes RTSVX and RVI worse approximate the realized variation than the alternative index, based on the implied variation integration. Further analysis of power variation of log-returns for RTS index shows that Levy processes with unbounded variation without diffusion component better describe the dynamics of the Russian financial market. A new model-free formula for the volatility index is proposed in the class of Lévy processes. The new formula suggested is based on the variation representation via market option prices.
Keywords: mathematical modeling, numerical method, mathematical finance, volatility index, option, Levy process, diffusion model, quadratic variation, RTS index, derivatives market.
Abstract: We consider the importance of taxation instruments on sustainable forest management. The goal is the creation of geographic information systems to efficiently develop leased forest areas in the short and long term to meet the requirements of the forest legislation of the Russian Federation and the minimization of the cost of a unit of harvested timber, in order to increase profits logging companies.
Keywords: "Keywords: forest taxation, age borer, forest management, forest raw material preparation, geographic information systems , cost reduction"
Problem of the choice of software testing method as a problem of a multicriteria optimization is put and considered in this article. The method of testing of the separate program module can be automated, manual or the mixed. In this case the problem of optimization has a degenerate representation because the set of admissible decisions contains only several elements Such formal simplicity is compensated by the significant amount of criteria and a graduated algorithm of their calculation. This algorithm is based on processing of expert estimates. Estimates are given in group of programmers – creators of the software product, and in group of systemic testers. For programmers the special questionnaire is used. The algorithm of the solution of an optimization problem based on a method of group linear convolution is offered. Total value of convolution for the separate program module corresponds to one of three possible methods of testing: automated, manual or the mixed. The offered algorithm can be extended to other problems of discrete optimization with terminating quantity of elements of an admissible set.
Keywords: software testing, multicriteria optimization, admissible set, automated, manual or the mixed testing, expert estimates, program module, linear convolution, algorithm of the solution of an optimization problem
It implemented the problem of identification of damaged bearing beams span bridge structures using vibration diagnostics methods, taking into account experimental uncertainties associated with natural hazards and man-made processes. Method fault location is based on analysis of dynamic properties of the structure, such as the natural frequencies and mode shapes. The paper shows the study of finite element model of the bridge structure using the method of determining structural damage indicator based on the values of waveforms normalization taking into account the values of the oscillation area.
Keywords: damage detection, multi-girder bridge superstructure
The paper represent a view about modern solutions of operational notification of emergency services about Hard traffic accident and realisation of suitable software product.
Keywords: mobile device, mobile application, medical ambulance, emergency reaction, means of the notification, electronic medical record, java programming, Android operating system, road accident, geodata, time, "gold" hour
Economy of resources in case of production of combined steel concrete designs is the main task of a construction industry. The possibility of expansion of the range of fractionation of fillers by use of small career sands of the region is considered that will provide flexible regulation of grain composition of filler. Enrichment of construction sand by small fractions of filler causes more dense packaging of grains, cutting a cement consumption
Keywords: resource-saving, cement economy factors, secondary raw materials of the region, sand fractionation, optimization of composition of filler
At institute of architecture and construction of the Volgograd state technical university (IAIS VOLGGTA)) for more than thirty years the researches directed to decrease in pylepostupleniye on urban air environment are conducted. Some schemes of configuration of systems of dust removal of emissions with dust collectors on the counter twirled twirled flows (VZP) realized at various enterprises are provided in article.
Keywords: devices VZP, system of dust removal, scheme of configuration, pyleochistka, efficiency of a pyleochistka
Considered several locations the bus station located in the city of Rostov-on-Don, and their location in urban areas. In the process of continuous urban growth and the construction of new housing estates, suggested to build a new avtovokzalnogo complex includes the station building itself, as well as the building of the hotel with car parking.
Keywords: bus, "model projects", "individual projects", Fibonacci spiral, bionics, shell-Nautilus
The article is devoted to project management of oil and gas complex and solving problems with the help of building information modeling at all stages of the project life cycle. It is dealt with some of the problems that arise during project management for construction of complex technological objects. The paper proposes the introduction of innovative information modeling technology to solve the problems. It is spoken in detail about the basic concepts and levels of development of building information model. The text describes some of the tasks that can be solved with the help of BIM-technologies at all stages of the project life cycle. Also, it is shown the impact on project outcomes and relationship between BIM engagement level and return on investment. In conclusion, the article points out that use of building information modeling leads to rapid, cheap and effective project management of oil and gas complex.
Keywords: BIM, building information modeling, level of development, project management, project life cycle, technology and organization of construction, oil and gas complex, designing of oil and gas objects, innovative technologies
In article traffic safety of vehicles on a straight section of the road is considered. Possibility of a road accident at sudden braking ahead of the going car for any reason is estimated. For safety of the movement and prevention of capacity reduction of the road because of emergence of a road accident the vehicles moving on a straight section of the road of big extent have to observe the distance determined by formulas.
Keywords: road capacity, road accident, traffic safety, minimum and safe distance
In this paper basic problems of safety control during metering complex development are observed. The system being analyzed was divided into two parts:low level (energy meters and GSM-concentrators) and high level (GSM-channel and server). These two parts analyzed before making models for each of them. The whole system is considered a queuing system, main techniques are observed. Analytic model is developed for low level of system, and imitational model is developed for high level. The most safety critical element is recognized. The resulting models could be used in future work as an event generators for analytic software.
Keywords: queuing system, modeling, imitational model, complex, energy resource, energysaving
In accordance with the theory of mathematical and statistical modeling, evaluation studies, selected the main characteristics of the models describing the studied production process of fiberboard using different types of binders. In accordance with the developed plan of the selected controlled studies, uncontrolled and controlled factors of the process under study. The levels, steps, and intervals of variation of the studied factors. As a method of obtaining the mathematical dependencies of the quality indicators of fibreboard from the kind of used binder was enacted active single-factor experiment. The results of the studies conducted statistical analysis of the dependence of physical-mechanical characteristics of the performance of the finished plate thickness fibreboard manufactured by wet and dry methods, interpretation of research results, quantitative and qualitative relationships between the studied parameters.
Keywords: strength, water absorption resin, fiberboard, thickness, experiment planning, mathematical model
Results of researches of increase of efficiency of a desulfurization of domestic thermal power plants are reflected in article. Reduction of emissions of dioxide of sulfur due to use of the oversaturated water solutions at dissolution of not extinguished lime anolyte will allow to reduce emissions in the atmosphere on average to 1042,48 tons/year on one 300 MW power unit.
Keywords: issue, desulfurization, sulfur oxide, power unit, anolyte, catholyte, activation, solubility, electrochemical processing, gas mix
The article discusses methods of improving socio-economic development of the construction enterprises through the implementation of process management. The analysis of the conditions under which this type of effective management. Recommendations for its implementation in the production process.
Keywords: the еconomics of the industry, organization and management in construction, environmental safety