The parameters of the porous structure and the active surface of cobalt catalysts for the synthesis of liquid and solid hydrocarbons (Fischer-Tropsch synthesis) prepared by the method of impregnating a silicate carrier were studied. The effect of additives of oxide promoters on the specific surface, the volume and size of pores, the dispersion and size of crystallites of metallic cobalt on the surface of the Co / SiO2 catalyst was studied.

Keywords: Fischer-Tropsch synthesis, motor fuel, synthetic hydrocarbons, catalyst, promoter, carrier, specific surface, porous structure, catalytic activity, selectivity

In this paper the method of electrochemical oxidation/dispersion of zinc using pulse alternating current with average density of 0.2:1.2 A/cm2 was used. The mixture of ZnO and Zn5(OH)8Cl2·H2O (simonkolleite) was obtained. The application of this product as a photocatalyst provides a practically full removal of methylene blue dye under UV light. When the sample is calcined at 400 °С the decomposition of simonkolleite with a ZnO formation occurs. It is accompanied by decrease in surface area and photocatalytic activity of the material.

Keywords: zinc oxide, nanoparticle, simonkolleite, pulse alternating current, morphology, photocatalysis, methylene blue

The article presents a comprehensive analysis of emission indicators from stationary sources and emissions from motor vehicles in the Rostov region and the city of Rostov-on-Don, as well as a comparative analysis for the two regions of the Southern Federal District. The forecast of the ecological situation is made and the adequacy of the proposed mathematical model is checked.

Keywords: emissions of pollutants, toxicity, exhaust gases, stationary sources, auto transport, internal combustion engine

Article is devoted questions of road design taking into account its visual smoothness. In article questions of influence of visual smoothness on the providing by it of velocity of movement of vehicles are considered. In article the developed practice of roads design is analyzed. The given practice, in a due measure, does not consider requirements of landscape designing. Which, in turn, though are registered in the arch of rules, but have recommendatory character. Also in article questions of use of the minimum parameters of highways are mentioned at its designing. The necessary increase in the minimum parametres of norms of designing for maintenance of movement of vehicles with settlement speeds is recommended. The special attention in article is given transitive curves as their use at observance of principles of coordination of elements of the plan and a longitudinal profile provides visual smoothness and clearness of a line of a highway. It in turn raises traffic safety on these lines. The considerable attention is given the analysis of technical and psychological safety, as to the reasons of emergencies on roads. In article raising factors of values of radiuses for achievement of psychological comfort by the driver are offered at passage of curves to the plan.

Keywords: Road line, longitudinal profile, visual smoothness, landscape designing, radius of a horizontal curve, spiral curve, safety of traffic

The article is devoted to the task of searching for the design solution of the structural coating plate. Structural plates are widely used to cover single-storey structures and have a wide variety of structural and architectural forms. The choice of minimum weight design is based on the VAT control method. As the regulators adopted the location of the columns and the class of steel. Depending on the number and location of the columns on which the structural plate rests, the forces in the structural elements change and accordingly the cross-sectional area and mass of the structure change. Four variants of the arrangement of the columns and three versions of the class of steel were considered. For each design variant, the design was calculated numerically, the cross-section was selected, and the mass was determined. Based on the accepted criterion of the effectiveness of the design solution - metal consumption, the most effective design solution was adopted with the arrangement of columns along the perimeter of the coating in steps of one cell.

Keywords: space grid structures for roofs, regulation of stresses, optimization, metal consumption, criterion of optimality

The method of calculation gamma percentage fatigue resource of an arrow shovel excavator. Using this method can most accurately determine the distribution of the extreme members of samples and the corresponding shifts of the Weibull distribution. It was found that to calculate the shifts do not have, you can use only the extreme members of samples.

Keywords: reliability, probability, resource, sample, excavator

The results of a survey of the technical condition of the buildings included in the list of objects of the cultural heritage of the Rostov Region are analyzed. Identified features of the foundations of buildings built in the middle of the XIX - early XX centuries. Recommendations are given on the preliminary assessment of the scope of work on the technical survey of foundations and foundations, as well as restorations for similar buildings constructed in the specified period

Keywords: objects of cultural heritage, bases, foundations, inspection of the technical condition of buildings

Article is devoted geodetic researches, as the most important at designing of highways and airdromes. The complexes of works made at researches and designing are considered. Importance of topographical shooting of district by geodesists for creation of new cards, in the absence of cards, plans in contemporary records is noted. The special attention in article is given the modern geodetic equipment, such as: electronic recording tacheometer, GPS - antenna, and the 3D- scanner. These devices, their versions, scopes are in detail considered. The purposes and problems GPS of measurements, and also methods of work GPS of receivers are considered. In article- geodetic maintenance at building of elements of an airfield is in more details considered. Kinds of the works, which are carried out by geodesists, are designated. It is noticed that use of the modern equipment and software product AutoCAD, AutoCAD Civil 3D, CREDO, GENERAL PLAN Geonics, etc. To analogues of these software allows to save not only time for processing of field measurements, but also to carry out continuous control of a thickness of separate layers at packing that, in turn, leads to economy of means. In the conclusion authors underline special importance and responsibility assigned to geodetic service. It is noticed that introduction of the innovative equipment in all structures of road building will undoubtedly set good rate in development of a network of highways and airdromes.

Keywords: Geodetic researches, highway, electronic recording tacheometer, GPS - antenna, laser 3D - the scanner, topographical shooting, airdrome, aerial photography

The task of this work is a survey of passenger correspondence, a traffic intensity survey ,a passenger traffic survey of the road net on the example of Sochi. Used methods: passenger correspondence polling by questionnaire, statistical analysis for the array of correspondence processing, observation, registration and analysis of traffic and passenger intensity.

Keywords: passenger correspondence, traffic, public transport, passenger traffic

In this paper, we study the frequency dependence of the inductor with a ferromagnetic core in the sound frequency range. Based on the measurements made, a replacement circuit for the coil is constructed, taking into account the active losses due to magnetic hysteresis, as well as the capacitive component of the current appearing at higher frequencies. The method of determining the parameters of the substitution scheme is given in the article, which, due to the complexity of the mathematical model, was determined by statistical averaging of the solutions of systems of nonlinear equations. Conclusions are made about the practical application of this substitution scheme in electronic devices.

Keywords: substitution scheme induction coil, frequency dependence of the impedance of the induction coil, active losses in the core

In article metallurgical production as the metallurgy is one of the main sources of technogenic environmental pollution and a working zone is considered. Authors have described the main sources of formation of fine dust by results of which the analysis of fractional structure of the dust particles which are allocated during the operation of the arc melting furnace has been carried out. The submitted data demonstrate that the dust coming to rooms of the shop has the sizes from 3 to 18 microns. The share of mass of particles with sizes less than 10 microns in air of the electrosteel-smelting shop makes from 15%.

Keywords: fine dust, disperse analysis, sources of formation of dust, steel-smelting furnace, metallurgical dust

The article describes the possibilities of data backup with the help of cloud services in data management in networks. It also describes how to create backups, how to verify the integrity of files in a backup, and how to ensure the reliability of the copies themselves. The formulation of the problem is formulated as follows: it is necessary to find the best way to store backup data ensuring the best safety of these data at the lowest cost and reduce the complexity of the backup. As optimization criterion in this study was considered work on backup software, data storage reliability, the integrity of the files in the backup, the financial costs for providing backup. Analysis of the results of the study showed that the storage of backups in the cloud compared to traditional methods of backup - more profitable in many aspects. In modern data centers due to the large scale of the level of reliability of data storage is much higher, the cost of disk space does not vary significantly with the cost of purchasing hard disk and automatic backup check allows you to save a lot of time.

Keywords: Backup, backup, cloud technologies

Researches of hardness of various steel grades for the purpose of determination of density of their distribution and distribution of extremes of selections are conducted. Results of the received researches are used for definition of a resource of details with use of a graphic method of transition from selection to set.

Keywords: selection, fatigue resource, population of final volume

The peculiarities of the deformation diagram under short-term central axial compression of concrete of the frame structure of class B60, obtained by immersing a large aggregate in a low-viscosity solution component, are revealed. The boundaries of microcrack formation of concrete are determined. A good correspondence of the main regularities of the change in the tensile strength and deformation properties of a concrete frame structure with some known data is shown. The possibility of an analytical description of the deformation diagram of a concrete frame structure known formula Sargine (Sargine) is confirmed. Data are presented on the change in the initial modulus of elasticity, the Poisson's ratio, the change in the volume of concrete and the propagation velocity of ultrasound in concrete, depending on the level of loading. The ratio of cubical and prismatic strength is given. The conclusion is made about the expediency of using concrete frame structure in reinforced concrete columns.

Keywords: concrete frame structure, tensile strength, modulus of elasticity, deformation diagram, parametric points, microcrack formation, superplasticizing additive

Current problems of information modeling technologies are considered. Models of effective enterprise management at various stages are proposed. Recommendations are given on the calculation and verification of management systems, which allow to obtain the greatest economic effect with minimum risks

Keywords: organization of construction; innovation; methods of company management; project management