In July 2017 marks the 10th anniversary of the publication of the first issue of the scientific journal "Inženernyj vestnik Dona (Rus)". I would like to wish all the authors, members of editorial Board and editorial staff new exciting discoveries and publications, creative achievements for the benefit of the development of Russian science and industry!
Keywords: anniversary, achievement, congratulation
This paper presents an analysis of the development process of the electronic scientific journal "Inženernyj vestnik Dona (Rus)". Conceptually, the journal reflects a new culture of scientific publications based on global and mini Internet platforms. It is shown that the basic advantage of an electronic journal is achieved through the implementation of an open access initiative. From the date of publication, the material is available for the widest possible range of readers. This imposes additional reputational risks on authors and on the journal as a whole, motivates mutual responsibility. Conceptually, the journal "Inženernyj vestnik Dona (Rus)" focuses on the traditional branches of engineering knowledge. The journal supports publications in the light of convergence of engineering methods and professional and scientific competencies of specialists in various fields of science. The journal represents a kind of interdisciplinary scientific engineering forum. The journal implements the initially adopted principle of "development based on science."
Keywords: electronic scientific journal, Internet platform, interdisciplinarity, open access, concept, results
Diffraction characteristics of the gratings are calculated by two methods - method of approximate boundary conditions and a strict method based on the numerical and analytical solution of the two-dimensional integro-differential equation. Results of the graphene diffraction gratings calculations are presented.
Keywords: graphene, graphene gratings, volume integral equations, plasmons, coefficient of reflection
An analysis of the mechanisms limiting the growth of the output characteristics of ion recombination He-Ca lasers with an increase in the active medium volume and frequency of pulse repetition is carried out. It was established that by a growing laser tube diameter and a growing frequency of pulse repetition the average power of He-Ca lasers saturates and then decreases due to the formation of radial non-uniformity of the active medium as a result of its overheating on the axis and of the radial cataphoresis, as well as because of the raise of the electron temperature level in early afterglow, conditioned by the grow of gas temperature. It is pointed out that as possible ways of increasing the output characteristics can be used the blackening of the laser tube surface, the use of an independent input of calcium vapours, the use of a forced cooling, while the application of a tube with rectangular cross-section will allow to maximally increasing the energy characteristics. Based on numerical computations it is shown that the attainable maximum of running power of He-Ca lasers amounts to: ~ 4.4 W/m for self-heating active elements from BeO-ceramics and ~ 5.2 W/m – on blackening their surface; ~ 5.3 W/m for an independent calcium vapours input and ~ 6.2 W/m – for its combination with blackening; ~ 9.5 W/m for an intensive forced cooling of active elements with cylindrical geometry; ~ 16 W/m – with active elements of rectangular cross-section at a ratio of wall sizes 1:3.
Keywords: metal vapor laser, the ion recombination He-Ca laser, pulse-periodic discharge, gas-discharge plasma, self-heating regime, mathematical modeling
The method of control parameters of electro-acoustic transducers of the piezoelectric type, composed of an acoustic antenna arrays by electrical measurements is described. A convenient practical implementation of this method by determining the integral of active component of conductivity (area under curve) is proposed .
Keywords: acoustic antenna array, electro-acoustic transducer, piezoelectric element, control of parameters
Gas-powder dynamics within the off-axis nozzle of the Precitec YC52 laser cladding head (Germany) has been studied using the original Tepler shadow setup, the high-speed tracing system and the laser Doppler anemometer. The length of the laminar part of the gas-powder flow has been optimized for variety of the transport and shielding gas flow, as well as the diameter of the orifice of cyclone. Powder jet at the nozzle’s outlet follows the carrier gas flow structure. In case of 4 mm nozzle’s diameter, the powder stream separates into two stable vortex structures near the surface of the substrate, causing significant losses of powder particles (about 2/3 of the total powder mass) within the melting zone, which finally reduces the efficiency of the deposition process and the powder utilization. Practical recommendations on the application of the optical diagnostic to optimize gas-powder jets for laser cladding are provided.
Keywords: laser powder cladding, shadow method, off-axis nozzle, tracing, laser Doppler anemometry, gas-powder flow optimization
An algorithm for numerical simulation of optical structure disturbance of biomedical objects is described. The key features of the presented algorithm are: posterization of CT or MRI scans, subsequent encoding and manual identification of each biological tissue, assigning it tabular optical properties. The described algorithm can be used in diffuse optical tomography (DOT) for numerical simulation of optical properties of biomedical objects of their constituent with variable spatial resolution. Numerical simulation showed that the presented algorithm allows us to describe the optical structure of biological tissue with data validity >90%.
Keywords: optical properties of biological tissues, time-resolved diffuse optical tomography, forward problem, turbid media, posterization
Way of implementing pipelined processing of substances using broadband focused aperture were considered in this article. The model of this installation was created and calculated in the software package CST Studio Suite.
Keywords: microwave, broadband aperture, processing, focused aperture
In the article a method for analyzing the characteristics of materials is considered, with the possibility of more accurate measurement by typical measuring instruments. Modled computer models of tees with different types of wave propagation are considered. Also talk about the design of the models created and an analysis of the results obtained on the study of the characteristics of materials, with the possibility of more accurate measurement by typical measuring instruments.
Keywords: Microwave, VHF wave, the centimeter wave range, waveguide tee, coaxial tee, resonance method
The method of determining the speed of a bus before its overturning is considered. According to statistical studies, it was found that rollover of buses is a fairly common type of traffic accidents (road accidents). However, in this kind of accident, a large number of casualties and even deaths are recorded. In such cases, the investigator-investigator must identify the culprit in the accident, as a rule, it can be a master for the production of vehicles on the line, if the cause is a bus malfunction. In addition, it can be drivers of other cars or pedestrians. The driver of the bus, who took the wrong actions in the current dangerous situation, can also be guilty. The most common cause of an accident is the driver violating the speed limit. Therefore, the investigator-investigator must determine how fast the bus moved before tipping over. For this, there is a standard method for determining it. Based on the received speed value, it is concluded whether the driver violated or did not violate the established speed regime. However, this technique will give excessive values of speed, for example, if the driver has made a maneuver "rearrangement", known as the elk test. Thus the bus, moving on an arc in the beginning in the right, and then to the left with the resolved speed, has risk to overturn. This is due to the impact of the alternating centrifugal force, as well as the additional forces acting on the bus bodies, due to the compression-expansion of the suspension springs. The article defines the speed of the bus before the overturning, at the time of the maneuver "rearrangement".
Keywords: diversification of management, production diversification, financial and economic purposes of a diversification, technological purposes of ensuring flexibility of production
The article describes the concept of advanced marketing. Describes the main features of the Corporation, as the organizational-economic forms of business. Investigated the place and role of advanced marketing as a strategic tool of realization of competitive advantages of the business entity. Proposed stages of creating a sustainable business model, which includes initial information gathering,strategic analysis and pricing strategy. Reflects and reveals classic and innovative model of development of the Corporation. Presents the factors in the development of the Corporation's solvency, liquidity and profitability of capital.
Keywords: korporacija, operezhajushhij marketing, organizacionnaja kul'tura, klassicheskaja i innovacionnaja modeli razvitija korporacii
The article is devoted to environmental security as a factor of competitiveness of enterprises. Disclosed financial parameters conservation activities. The proposed approach of separating environmental efficiency into types to influence on the ecological safety of the enterprise. The purpose of the environmental and social assessment. The proposed decision-environmental decisions. For the solution of ecologicallysustainable enterprises.
Keywords: environmental safety, competitiveness, risk, financial stability, performance, management efficiency
An important component of electronic document management and training systems is considered - a full-text search engine that allows to implement convenient means of searching for information of interest on the contents of electronic documents. Estimates of the efficiency of full-text search in databases are given.
Keywords: Database, full-text search, database management system, MySQL, PostgreSQL, Oracle
The article deals with the construction of exponential smoothing model and an additive model of the time series according to the quarterly data of the customs payments volumes for the import of a group of goods 72 «Ferrous metals» and 73 «Goods from ferrous metals» for the period from 2014 up to the first quarter of 2017 in the region of Rostov Customs operation. According to the received models, the forecast for the second quarter of 2017 has been made.
Keywords: econometrics, time series, adaptive methods, exponential average, modeling, forecasting, customs payments
In this work, we carried out a study of algorithms implemented by the system of human identification based on various criteria. Three main approaches to face recognition are considered. The advantages and disadvantages of approaches revealed during implementation are given.
Keywords: Databases, face recognition, pattern recognition, hidden Markov models, principal component analysis, neural networks
The article deals with the question of injury to the enterprise "Rostvertol" for the period from 1999 to 2010. Discusses some indicators of the status of labour conditions and safety of employees. The analysis of data on the number of injured in accidents at work by gender, age and length of service in the organization. As well as the number of injured by type of accident and by profession. Analyzed data on the number of victims for reasons that have led to an accident in the workplace. On the basis of the study there are several main reasons. Such as the unsatisfactory organization of work and production violation of labor discipline.
Keywords: labor protection, labor conditions, injury, accident, industrial injuries, mechanical engineering enterprises mechanical contact
The analysis of protection of institution of higher education is labor-intensive and difficult process since it is necessary to analyze the big data (including employees). At the same time, there is a complexity in their processing, i.e. considerable expenses of time and human resources. The task of automation of this process for the solution of this problem is up to date. Each enterprise adapts the existing methods of the analysis of security on the based on a kind of activity. In this regard, an up to date task is development of new and modernization of the existing methods to a security assessment on the based on functioning of institution. The authors created an algorithm for calculation of assessment of protection of the information resources on the based on power factor of measures of protection. The offered algorithm of an assessment of the general level of security allows to define how effectively all realized methods of protection of an information system on the base various the groups of measures of ensuring information security are used. There are presented dialogical model of a system by means of the UML. The architecture and the classes of system is described. The solution at automation of process of analysis of protection proposed by authors is presented in the type of Web-service. The presentation of the created system is described on the example of the analysis of an object "1C accounts department".
Keywords: information system, information security, analysis of protection
In the article on the example of the firm which is engaged in production of plastic windows business processes modeling of production companyis described. The analysis and modeling of business processes of the company are carried out, the charts of the IDEF0 and DFD model created by means of the software product "AllFusion Process Modeler" are presented, information streams of the organization are shown. Shortcomings of various aspects of activity of the organization are revealed. Model of an information system is realized: requirements and problems of IS are formulated, the functional model is developed (by means of the AllFusion Process Modeler software product).
Keywords: production company, production, modeling business processes, IDEF0, DFD, software product, business process, chart, organization
The present cultivators of the soil have a negligible width and depth of loosening is mainly up to 0.6 m. When the number of racks is significantly reduced completeness of loosening, increases the mass of the gun and increase traction resistance. In addition, the possibility of loosening soil to a greater depth is limited. There are rippers with surround deformers. They are inclined relative to each other vertical knife rack, rigidly connected to each other in the lower part with shingles made V-shaped with the apex directed upwards. In this architecture, the system deformers there is a need for analysis to determine the tensile strength in a first approximation: as much as possible to lengthen the elements of the blade without loss of strength and significant changes in their geometric characteristics of the flat cross-section. Reviewed the formulation of the calculation of the strength of the isotropic sloping steel plates of finite dimensions, a polygonal profile with rigidly clamped opposite edges of constant cross section, equal stiffness, as an element of deformers of the chisel type surround. Shows the justification of the selected geometric characteristics of the broken plate. Presents a preliminary finite element modeling using the software - computing complex Structure CAD (SCAD), considering static and dynamic loads. In the formulation of the numerical calculation primarily pursued the goal of establishing the adequacy of a solid model of the stress – strain state of a polygonal sloping steel plates of constant cross section with rigid pinched at the edges. It is established that the threat is a reduction in the actual thickness of the plate more than 1/3 of the project, which leads to failure of the individual piece of details. With little loss of thickness plots of displacements is characteristic reflects a valid value.
Keywords: The calculation of the strength, deep loosing, system of deformers, stress, strain, bending, a broken plate, clamped edges, geometric characteristics
In the scientific article, the problem of instrumental and methodological support of works on a special assessment of working conditions is considered. The paper presents an approach to the selection of measuring equipment for the measurement of harmful production factors, which is based on the method of expert assessments. The results of studies of the application of the expert method for determining the possibility of using a group of instruments for the assessment of physical and chemical factors for conducting a special assessment of working conditions at workplaces of a machine building enterprise are presented. Recommendations are presented for equipping the laboratory with laboratories that carry out special assessment work in the conditions of machine building enterprises.
Keywords: labor protection, instrumentation, measuring equipment, special assessment of working conditions, method of expert evaluation
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
Abstract: field application of lignosulfonate as a chemical additive for use in gypsum compositions. The influence of lignosulfonate on the physical and mechanical properties of pigmented plaster. The work studied the effect of lignosulfonate on properties of gypsum as strength properties, water absorption, softening coefficient and the changing colors of the material. Established that the application of lignosulfonate to a considerable extent not only improves the physico-mechanical properties of the material, but also its operational durability of pigmented gypsum, which expands the scope of these materials.
Keywords: lignosulfonate, pigmented plaster, physico-mechanical properties, strength properties, water absorption, coefficient of softening, change of color, long service life
In article a modelling and experimental survey of the controlled attenuator in a frequency range 2 - 4 GHz is performed. It is received the minimum attenuation no more than 3.5 dB, the maximum attenuation not less than 56 dB at a current 3.8 mA. The amplitude-frequency characteristic unevenness at a current 3.8 mA does not exceed 3 dB. The attenuator design is made in the form of the hybrid module. The attenuator is intended for adjustment of transfer constant of the microwave receiver.
Keywords: attenuator, pin-diode, amplitude-frequency characteristic, control current
One of the most important measures to reduce the risk of natural and natural-technological disasters is the engineering-geological mapping of the city area, carried out in accordance with a group of geological factors such as topography, formulation and properties of rocks, hydrogeological conditions, geodynamic processes development, etc. On the territory of the city of Novocherkassk as well as in other areas of urban settlements in the Rostov region, the active development of devastating processes associated with the extensive spread of clayey soils with low values of high strength characteristics and high water cutting groundwater arrays, caused by both natural active processes and technogenic influence. After the research conducted, it was decided that the area of the city of Novocherkassk is divided into zones of geological risk. Thanks to the mapping of the territory, it is allowed to make the right architectural and planning decisions and exploit it with well-executed investments, with security requirements.
Keywords: built-up area, the area of geological risk, monitoring, prediction, technogenic influence, management of spatial development