The article discusses the process of sulfuric acid alkylation used to produce high-octane gasoline, as well as the design of jet reactors, their advantages and disadvantages. Based on the existing drawbacks of jet reactors, the development of a new high-efficiency jet reactor design has been proposed.
Keywords: reactor, sulfuric acid alkylation, isosurface, isocontours, gasoline, fractions, jet type, industry, oil refining
The selective method of calculation because of the profitability is successfully applied several centuries. However when calculating non-failure operation in case of fatigue failures (often sudden) when there is a considerable sedate communication of m=10-15 for the supermulti-cycle field of loading between durability (hardness, an endurance limit) and the operating tension, decrease in the minimum resource of details will make 10-100 and more times. It turns out because of an unaccounted main part of population. In our example of 104-50=9950 pieces of such details, i.e. their potential refusals. Therefore for this case a selective method – the intermediate stage of calculations.
Keywords: selection, fatigue resource, population of final volume, sedate communication
The authors carried out in-situ studies of the distribution of the breakdown voltage values of the F8CV engine of the Daewoo Matiz Diesel engine idling at a minimum engine speed (650 rpm) and with an increased crankshaft speed (2840 rpm). A histogram of the distribution of the values of the breakdown voltage in the interelectrode gap of the spark plug is obtained for these operating modes of the internal combustion engine. It was revealed that at a minimum engine speed of the ICE crankshaft, the distribution of the cyclic values of the breakdown voltages obeys the normal distribution law for a spread of 6-15 kV. At higher speeds, the distribution of the cyclic values of the breakdown voltages differs from the normal distribution law. With an increase in the speed of the crankshaft, all values of the breakdown voltage fall by 3-4 kV. This can be explained by homogenization of the mixture and an improvement in the conditions for breakdown of the spark plug interelectrode gap.
Keywords: ignition system, spark discharge, internal combustion engine, spark plugs, breakdown voltage, histogram
Considered the importance of end-to-end technologies in the logging industry. Considered the importance of creating geographic information systems that allow rational development of leased forest areas taking into account the requirements of the forest legislation of the Russian Federation and minimizing the cost of a unit of harvested wood, in order to increase profits for logging enterprises.
Keywords: forest taxation, aerial photography, forest use, forest preparation, end-to-end technologies, geo-information systems
a method for calculation of electro-hydraulic raspylivatelja liquids. Theoretical dependences of the median diameter of aerosol drops on the fluid flow rate at different number of generator nozzle holes, on its main design parameters are presented.
Keywords: aerosol, dispersion, drop, generator, electrohydraulic atomizer
The article presents the developed cognitive model of tourism potential assessment, which allows to determine the prospects of development within the specific territory of the tourism and recreation cluster. The article describes the approach to the development of an integral indicator of tourism potential assessment, which should allow to determine the prospects of development within a specific territory of the tourism and recreational cluster. As part of the construction of an integral indicator, an algorithm for developing a system of indicators for assessing the tourist potential of the territory, based on the cognitive structuring of knowledge about the object, was proposed. In order to determine the functionally significant links between the system "Tourist potential of the territory" and the external environment, the study analyzed the connectivity of the structure, based on the study of simplicial complexes. As a result, a ranked list of factors of the "Tourist potential of the territory" system was obtained and the weight for each of them was determined, which allowed to form an integral indicator of the tourism potential assessment
Keywords: tourism and recreation cluster, cluster approach, tourism potential, cognitive research methodology, tourism potential assessment
We consider the model of resource allocation for ergodic and semi-ergodic resource networks with valve reachability. Approach for modeling the process of resource reallocation in network with valve reachability is proposed. This approach bases on using of the auxiliary network. Methods for finding the threshold value and the limit state for an arbitrary total resource value in a resource network with valve reachability are developed.
Keywords: resource networks, flows in networks, flow distribution, nonstandard reachability, limit state, threshold
Efficiency, quality and safety of construction are formed by the levels of management and integration relations between the enterprises of the industry and Federal services. Multidirectional construction business contributes to the formation of various types of inter-industry relations. Currently, intra-industry relations are dominant, which are typical for cluster formations in market conditions of development under the existing uncertainty. Effective management of supply and demand affects the stable profit of the construction industry.
Keywords: construction, management, territorial features, industry features, production, competition, integration associations
Patterns of structure, functioning and development of technical systems are the Foundation of any research and are of paramount importance in the design of new technical systems. The active use of modern computer technology can effectively solve the problems of the basic problems of the General laws of the structure and development of technology - the establishment and application of isomorphic laws for technical objects of different nature, which, in turn, are an objective basis for discoveries, inventions and improvement of modern technology and technologies. The software system of the Bank "ORCHID", allows you to obtain information models of technological processes, using automatic construction options FS in accordance with the laws of the CU. This opens up the possibility to manage the efficiency of chemical synthesis at the information level and to predict the creation of new substances and materials and technological processes for their production.On the example of chemical technology the results of application of the author's conceptual technology are shown, which open General prospects for technical creativity - the possibility of obtaining patentable results of intellectual activity with a high degree of novelty and competitiveness.
Keywords: banks of fundamental knowledge, technical creativity, conceptual analysis and synthesis, patterns of development, obtaining patent solutions, ensuring novelty
The article provides a system analysis of the development of small and medium-sized businesses in the regions of the southern Federal district in recent years on the main indicators; describes the key problems of their development, provides suggestions for their solution, taking into account foreign experience
Keywords: system analysis, small and medium business, regions, southern Federal district, development problems, state support, property support
This scientific study presents an analysis of organizational conflicts, as well as problematic aspects of activity in contemporary realities. The effect of organizational conflict on the effectiveness of an individual is shown. The urgency of researching the problem of the activities of the organization’s employees in the context of organizational conflicts, as well as ways to solve them, is given The analysis of the cognitive model. As factors used to reduce tensions in a team, it was proposed to introduce factors for raising qualifications and organizational culture. These factors will influence the target factor - performance. In the course of simulation modeling, it was found that by carrying out activities to improve the skills of employees, measures to increase the level of organizational culture of employees, the organization seeks to reduce tension in the team and, as a result, there is less staff turnover.
Keywords: simulation modeling, cognitive modeling, functional structural analysis, visual analytics, conflict, organization, model, social tension
Abstract: The analysis of the operational work of the district station Salsk in terms of increasing the volume of freight traffic in the direction of Kotelnikovo-Tikhoretskaya-9km.Developed measures to promote the development of infrastructure and improve the technology of the station and ensure the passage of the growing volume of freight trains. The estimation of the economic efficiency of the station in the conditions of implementation of the proposed measures.
Keywords: Key words: station, analysis of work, capacity, problems, activities, technology, economic efficiency
This article discusses the features of the power plant control based on renewable energy sources for additional and emergency power supply of surface robotic systems. This kind of integrated power plant can be built on the basis of wind and solar energy converters and produce at least 10-15% of all electrical energy required for the vessel. For the most important element of the KSEU - wind power plant (wind), the Electromechanical torque control on the shaft of its rotor is considered. For this purpose, firstly, the problem of controlling the angular velocity of the rotor rotation by means of variable geometry elements (IEG) of the VEU of perspective type is solved. As an IEG, the tunable distance from the lower part of the rotor to the upper part of the lower guide structure of this wind turbine is considered. Simulation of the equations of the controller for the particular case of stabilization of the rotation speed of the rotor. Secondly, the structural scheme of electrical control of the output characteristics of the wind turbine is justified and the method of selection of some key elements of this scheme is given. Features of realization of the electric circuit of connection of VEU, solar panels (SP) and diesel generator set in uniform KSEU are considered. It is shown that the constructed integrated control system of wind turbines is able to effectively solve the problem of parrying external wind disturbances.
Keywords: complex power unit, robotized surface platform, advanced windmill, solar panels, structural wiring diagram, hybrid controller
Today’s in the market of building materials there are a large number of roofing materials for pitched roofs. The materials for pitched roofs on the basis of its composition can be divided into mineral (cement concrete and clay roof tiles, asbestos cement sheets and tiles), metal (metal roof tile, profiled steel sheet, clicklock, composite roof shingles) and organic (asphalt shingle, onduline). All of these materials have their advantages and disadvantages, so the task of choosing the optimal option is complex and requires special methods to eliminate the subjectivity of evaluation. The article describes the approach to selecting the best option of roofing material from the available options by the set of its quantitative and qualitative characteristics. It is proposed to carry out the evaluation of options and selection of the best option based on the analytic hierarchy process. The article presents the results of the selection of the most appropriate roofing material for pitched roofs using the specified method.
Keywords: analytic hierarchy process, artificial intelligence, system analysis, decision-making, roofing materials
The article deals with the joint usage issues of the Multisim simulation program and LabVIEW graphical programming environment in the laboratory workshop of students of "Instrument making", "Standardization and Metrology" and "Biotechnical systems and technologies" in the study of "Microprocessor technology" and "Microprocessor systems development methods and tools " disciplines , as well as in the interdisciplinary project implementation. Multisim program allows you to perform developed microprocessor devices software and hardware complex simulation. The LabVIEW environment provides the opportunity to use real physical input signals in the simulation process, to perform additional processing of simulation results, as well as to simulate data processing algorithms at the initial stage of microprocessor devices development. The laboratory work experience using Multisim and LabVIEW, as well as interdisciplinary design at the Department of information measuring technologies and systems showed that the skills acquired by students in the digital devices software and hardware development enable students to successfully perform final qualifying work.
Keywords: hardware and software complex, Multisim, LabVIEW, laboratory workshop, interdisciplinary project
Based on the provided system analysis, a significant unevenness in the distribution of the number of Academic dissertation councils attributable to existing specialties has been established. It is shown that one group of specialties accounts for from 30 to 110 Academic dissertation councils, while for some others - from 1 to 3.
Keywords: dissertation council, specialty number, number of specialties, uneven distribution of specialties
Parameters of logging machines are determined by the characteristics of the subject of labour, in particular the size of trees. In stands the sizes of trees vary and have stochastic character. This leads to the difficulty of determining the design tree for the felling machine or calculating the weight of the wood moved by the transport machine. The problem is complicated by the fact that the design of the forest machine should ensure the efficiency of work in different stands. The solution of the problem of determining the calculated characteristics of the subject of labour (characteristics that determine the values of external forces acting on the forest machine) can be based on the analysis of regularities in the structure of stands by thickness. The purpose of this study is to describe a method of constructing stochastic models of the structure of the stand by thickness in the design of forest machines and an example of its application. The proposed method makes it possible to form a stochastic model of the tree stand structure by thickness for the forest area under study and covers procedures from the collection of initial data to the generation of the tree diameter algorithm. Generation algorithms obtained by the method can be used in the development of simulation models for computer experiments aimed at calculating the optimal parameters of forest machines.
Keywords: forest machines designing, stochastic simulation, stand structure by thickness, tree diameter distribution, simulation modeling, computational experiment on the computer
In this article, using the decomposition approximation based on Norton's theorem, the authors present a mathematical model of the distributed information processing system based on the local computer network on file-server architecture with arbitrary functions of the distribution of service time of requests in the network nodes. A conceptual model of an equivalent two-node Queuing network is constructed, in which the first center of the network coincides with the i-th center of the original network with an arbitrary law of distribution of the duration of requests maintenance, and the second (composite), which is the equivalent of the rest of the network, has exponentially distributed service time, which depends on the number of messages in it. The basic mathematical expressions for calculating the intensity of service in the composition center, as well as expressions for calculating the average response time of the system to user requests are also presented.
Keywords: distributed information processing system, file-server architecture, decomposition approximation, queueing network, compositional center, intensity of service, the average response time of the system to user requests, conceptual model, normalizing constan
The article proposes a scheme of modernization of the gasoline engine to work on a gas-air mixture. This article discusses the technical characteristics of the engine on gasoline which is recommended by the manufacturer. The characteristics of the engine operation on the gas-air mixture without alterations, and the characteristics that the engine shows when working on the gas-air mixture with the already made changes are also given.
Keywords: car, gas equipment, intake valve, compression ratio, mixture pressure
The exposure of the Aires resonator to electromagnetic radiation with a frequency of 6 GHz is considered. The resonator is a silicon plate with a diameter of 7.4 mm with circular grooves applied by etching. The resulting resonator with a thickness of 0.5 mm contains 4084101 circles of various diameters, which in orthogonal cross sections represent rectangular slits 0.2 μm wide and 0.6 μm deep. It is assumed that the radiation source falls on the resonator evenly from all sides. Thus, we have a radiation source in the form of a hemisphere, the radius of which is substantially larger than the diameter of the resonator (10 m). The intensity of the incident radiation and the frequency of the radiation are assumed to be known. It is necessary to find: the intensity of the radiation at some point in space above the resonator. (Receiver). If the radiation falls on the resonator not in the slot, then a reflection occurs (the angle of incidence equals the angle of reflection). If the radiation falls into the gap, then the reflection does not occur, and absorption occurs. It is assumed that radiation is diffracted on the slits. If you change the time with a certain step, you can calculate the intensity at any point of the receiver at any time. As a result of irradiation of the resonator over its central part, periodic radiation with frequencies of 6.85 GHz and 5.38 GHz is generated. At other frequencies, radiation is generated that is not periodic and is similar to chaotic radiation. The resonator can be considered as a converter of the incident periodic irradiation into other periodic radiations. These periodic emissions have frequencies that can be resonant for some molecules and parts of living organisms that make up the cells. By varying the depth and width of the slits on the resonator, the size of the resonator and other parameters, it is possible to obtain specific frequencies to which particular components of living cells are sensitive. This will allow targeted action on the cells of a living organism.
Keywords: mathematical modeling, structured silicon surface, high-frequency electromagnetic radiation, resonant frequencies, living organisms
The developed information and training system is intended for vocational guidance, initial training and advanced training of technological personnel of industrial enterprises associated with batching and pouring aluminum alloys of various brands. The system contains the necessary amount of theoretical information that describes the basic principles of aluminum production using the most well-known technological operations aimed at forming the required metal alloys with a given chemical composition. The functional of the system is close to reality, using only proven empirical data, as well as reliable models of the internal processes of the system, created using commonly known physical, chemical and mathematical laws. The process of interaction with the training system is controlled by an algorithm that monitors the order of execution of the main technological stages of aluminum production. The training system allows you to load previously prepared values or to customize the new initial parameters of the system in the "Administrator" mode, corrected for various restrictions and interference that occur in production. The approach to the training of technological personnel is based on the use of the standard method of learning "trial and error", which allows a multiple search for a solution to the same or other similar technological problems in the formation of a metal alloy with specified chemical characteristics. The user's work with the training system is limited in time and is accompanied by the calculation of the total amount of production costs, taking into account the cost and availability of various technological operations and materials. To verify the results of the solution, an algorithm is used to find the optimal version of the ratio of the initial components of the charge, aimed at obtaining the best solution for the technological problem with the lowest cost of melting the required volume of metal. The search for the best variant of the solution of the technological problem of blending is calculated using the method of sequential optimization, in which the solution of the subtask in the previous step of calculations becomes the basis for subsequent calculations. Thus, the use of the information and training system makes it possible to improve the quality of final finished products, reduce energy costs of production, and reduce the prime cost of smelting each ton of metal by reducing the time indices of production and more rational use of material resources.
Keywords: information and training system, technological personnel, process modeling, aluminum grade, charge, alloying, chemical composition, cost of production, finished products
This work completes a series of articles about the peculiarities of the analysis of the situations in the geo-politically unstable regions of the modern world. The article discusses the possibility of forecasting the pro-cessses in the unstable areas (regions) of the contemporary world. It analyses the difficulties of the implementation of the forecasting procedure connected with the multifactor combination of the geopolitical processes in a turbulent environment. Under consideration are both traditional and innovative methods of forecasting processes in weakly structured, unstable regions and limitrophe areas. Special attention is given to the scenario method, «rand-scenario» in particular. It is being emphasized that in modern conditions the transition to the paradigm of "unsustainable development" as well as full attention to the analysis and forecasting systems with nonlinear dynamics is of great importance.
Keywords: the geopolitically unstable areas (regions), forecasting, forsythe, complex forsythe, events and chains of events, the projection of “the launching codes”, trend, scenario method, «rand-scenario», drivers, jokers, non-linear dynamics, destructors, synerge
The article is devoted to solving the actual problem of improving the efficiency of software testing based on the development of an automated control system for this process. The structure of the created system is proposed, which allows specialists to form the advising effects for the best implementation of each of the software testing stages. Optimization models are presented that ensure the correct selection of the values of various attributes of test plans, test cases, defect reports and other documents created during the testing process. The structure of the neural network and the concept of its application for the most accurate selection of attribute values are described. The research is supported by a stipend of the President of the Russian Federation to young scientists and post-graduate students (No. SP-100.2018.5), which was assigned by the grants Council of the President of the Russian Federation.
Keywords: software testing, optimization methods, automated control system, neural networks, test coverage
The problem of increasing the efficiency of training specialists in software testing based on the use of an automated training system to control the process of formation of professional competencies is considered. To reduce the labor intensity and increase the efficiency of the testing process, the task is to train the novice specialist in modern testing techniques, including taking into account the experience of real software projects. The use of automation tools can intensify and improve the quality of the learning task. The paper proposes models and algorithms to control the formation of professional knowledge and skills of specialists in testing using modern mathematical methods. The research is supported by a stipend of the President of the Russian Federation to young scientists and post-graduate students (No. SP-100.2018.5), which was assigned by the grants Council of the President of the Russian Federation.
Keywords: automated training systems, software testing, personnel training, professional knowledge and skills
Having appeared on fusion of two megatrends – urbanization and digital revolution – the smart city paradigm signifies transition to modern cities digital governance. The history of the origin and evolution of the smart city concept is shortly given with the role of high-tech giants and the world's largest international organizations in the process. The steps of the Russian Government, high-tech companies and an academic community, which contribute to the emergence of smart cities in Russia, have been presented. The IBM and The World Bank declare that smarter cities make their systems instrumented, interconnected or integrated and intelligent. These three ways to use of information and communications technology we have interpreted as a smart city model. According to the Smart Cities Council a smart city enhances its livability, workability and sustainability by collecting, communicating and “crunching” data. These three core functions of a smart city have been described here as the second model. Smart Cities Council Chairman Jesse Berst on the third-annual Smart Cities Week D.C. have presented four actions a smart city performs: it collects, communicates, computes and controls. We can consider now the process of improving decisions and behavior had been separated from “crunching” as a new stage. The KPMG sets the smart city principle: it operates on a 4-step process of capturing data, communicating, analyzing and acting. Although KPMG’s model appears earlier, we suggest the model presented by Jesse Berst to be considered as the basic smart city model. It emphasizes four substantial stages in the use of ICT in smart cities
Keywords: smart city, digital economy, sustainable development, digital technologies, urban management, smart city model, data, information