×

You are using an outdated browser Internet Explorer. It does not support some functions of the site.

Recommend that you install one of the following browsers: Firefox, Opera or Chrome.

Contacts:

+7 961 270-60-01
ivdon3@bk.ru

  • Collision detection algorithms flat two-dimensional objects of arbitrary shape

    The paper lists the most common methods for detection of intersections and an algorithm for resolving conflicts of flat two-dimensional objects with complex non-convex shapes. The developed algorithm is characterized by the absence of a convex decomposition of non-convex objects. Examples collision resolution two non-convex objects. The estimation of the average time of resolution of conflicts. The efficiency of the algorithm, which works in more than three times faster than considered unique.

    Keywords: collision detection algorithm, flat two-dimensional objects, non-convex contours, convex decomposition, algorithm GJK / EPA, Minkowski sum, separating axis theorem

  • Formation technique of the training set using static heuristic analisis

    This article proposes the problem of the anti-virus heuristic analysis. Important feature of static heuristic techniques is dependence of indicators of detection on structure of the training set. Offered the technique of formation a training set . Concepts of a measure of similarity and a matrix of similarity were entered. The measure of similarity shows degree of compliance of one file to another. The matrix of similarity consists of measures of similarity of files of the training set. With use of the entered definitions the technique of formation of the training selection was developed. The main idea of a technique consists what the files which remained in the training set had as it is possible a smaller measure of similarity with the others. The carried-out experimental inspection showed efficiency and the practical importance of the proposed solution.

    Keywords: information security, virus protection, heuristic analysis, machine learning, training set, malwares

  • Features of creation of types of web portal of the national-cultural autonomy

    The article substantiates the relevance of the types of web portal of national-cultural autonomy. The architecture, functional model, information model, GUI main page of a typical web-portal of the national-cultural autonomy are given in the article. The positive effects of the introduction of a standard web portal of the national-cultural autonomy are listed.

    Keywords: information and communication technologies, web portal, national-cultural autonomy

  • Methods of analysis and selection of technology for building subsystem as part of the complex automated system (for example, SAP ERP)

    The study on the example of the choice of SAP UI Technology for the development of a subsystem of planning and actual time tracking has shown the proposed method of selecting one of the available technologies for construction of a subsystem based on a particular platform. The developed method includes the analysis of the features, advantages and disadvantages of each of the possible technologies and then a well-formalized decision-making process of choosing one of the technologies based on the analytic hierarchy process.

    Keywords: multicriteria problem, the method of analysis of hierarchies, the architecture of software systems, the user interface, SAP ERP, SAP UI Technologies

  • The use of the Minkowski metric of the first order in social studies

    The article presents a symmetry criterion for selection of metric used in interpreting the results of the measurements for different scales. The effect of the mismatch in a pair of scale – metric for technologies for semantic differential is studied numerically on the specific example. The analysis was performed on a concrete example interpreting the results of the survey of emotional perception of political order, made in May 2014 on the basis of RSSU. It was obtained that for the study of static group characteristics it is acceptable to use when interpreting the common approach with Euclidean metric. In the study individual characteristics and their subsequent use for modeling, you need to take the metric corresponding to the measurement scale. The Manhattan distance in this case. The functions of distribution for emotional perception of local and Central authorities with the use of this metric are obtained. It is shown that the investigated audience is consistent with the Pareto principle in the formation of conflict processes.

    Keywords: scale measurements, metric Euclidean, Manhattan distance, invariance, symmetry criterion, semantic differential, emotional perception, political order, distribution function, latent conflict potential

  • Analysis of group protest activity

    The technique of the analysis of latent group protest activity is given in this research. The work is a pilot study, focused on the identification of judgments relevant to the characteristics of the protest actions. We used the Thurstone method of pre-screening survey, in which participated 24 people. The analysis passed within one-dimensional scaling by means of ranging and creation of a scale of judgments. Shown approbation pilot study on a large group of respondents involved in the election campaigns of the Rostov region. It was revealed that for the majority of the respondents are acceptable actions are work in the government for the purpose of supporting the existing government, and also complete neutrality.

    Keywords: a political tension, protest activity, the group setting, cognitive component, behavioral component, questionnaire, latent conflict potential

  • Technical science. Building and architecture

  • Ecological heat and power recuperator for air heating

    The article presents ecological heat and power recuperator for air heating. Due to the development of jet turbulent flow of the heating air, this device achieves positive heat exchange effect. It also allows reducing the noxious elements in combustion gases, exhausting into atmosphere.

    Keywords: energy saving, ecology, heat-exchange, perforated surface, temperature, heat-exchange intensification

  • Research convective processes in a capacitive heat exchanger

    The article presents the results of an experimental research on the effect of the pulsating mode a capacitive heat exchanger with an active pipe part on the convective processes heated fluid. Described dignity capacitive heat exchangers. The research was conducted using a thermal imaging surveys. Compares two modes: stationary and pulsating. The method of experimental data processing, based on the analysis of fluid layers. A regression analysis allows to determine the dependence of the relative distribution of the temperature difference between the layers of fluid in the studied mode. The obtained regression equations were presented in the form of an exponential function and harmonic. The effect of pulsing regime on the process of convection in the upper quarter of the heating zone in a capacitive heat exchanger. The study showed the advantage of the capacitive heat exchanger with an active pipe part is often compared with the classical heat exchanger in part the speed of convective processes in the fluid to be heated.

    Keywords: capacitive heat exchanger with an active pipe part, pulse heating system, convective process

  • To the question about the communicative aspect of organization and management of construction operations

    Deals with the actual problems of linguistic communication in the organization and management of construction production, speech activities of employee organizations of the construction industry. Highlighted the problematic aspects, conducts analysis, provides possible solutions.

    Keywords: linguistic communication, organization and management in construction, applied linguistics

  • The production of foamed glass on the basis of technogenic waste and lithium-containing compounds

    The technology of producing foamed glass on the basis of technogenic waste, in particular high calcium waste and lithium-containing compounds, allowing to solve problems of ecology and resource saving. The possibility of using lithium-containing compounds as mineralizing additives foaming foam glass batch. Studied basic properties of foam glass.

    Keywords: preparation of foam glass, industrial waste, high calcium waste, lithium-containing compounds, foaming foam glass batch, lithium-cobalt-oxide material, building insulation materials

  • Analysis of the water permeability of impervious screens in the software package «Сomsol multiphysics»

    Due to the fact that currently seepage losses are significant, even with use of such geosynthetic materials like polymer geomembrane, evaluation of water permeability polymeric screens the presence of small lesions remains a major challenge. To simulate the filtration damage geosynthetic polymer screens use software package "Somsol multiphysics», allowing to solve both two-dimensional (plan) and three-dimensional (spatial) problem stationary and non-stationary filtration.

    Keywords: water permeability, impervious screen, filtering, geosynthetics, geocomposites, geomembrane, modeling

  • The noncontact method of dynamic deflection measuring of road constraction's elements

    The present article is concerned with noncontact method development of energy transmission and receiver probes information readout provided to monitoring permanent sets development in the road construction elements.Method is based on telemetering of elastic and plastic strains which accumulate in the road constructions under the action of traffic loads and climatic factors under actual road operating conditions. This method can be used either for highway and for special ground. Designed method make it possible both long-terms and short-times examinations and substantially enhance reliability and efficiency of receiver probes.

    Keywords: receiver probes, monitoring of road constructions, noncontact method, permanent set

  • The use of crushed concrete scrap as filler for self-compacting concrete

    The results of research on the effectiveness of a multistage crushing of concrete scrap by the "soft" regime are given. It was found that the processing of concrete scrap by this technology can significantly improve some properties of recycled concrete aggregate, particularly crushability, water absorption, shape factor "average thickness of the grain" and porosity. The result of this treatment is the formation of a significant amount of particulate material. This material can be used as a fine filler in the technology of self-compacting concrete. It was found that self-compacting concrete based on products of crushing concrete scrap has a strength of 50 MPa after 28 days of curing in normal conditions, and more than 70 MPa after one year of storage in dry-air conditions. It was established that received concrete has a lower modulus of elasticity, which should be considered when choosing the fields of its application.

    Keywords: self-compacting concrete, concrete scrap, secondary aggregates, multi-stage crushing, crushability, water absorption, elastic modulus

  • Research of strength characteristics of metal fixture of the wooden case of the river mooring

    Results of research of fixture of a wooden design of the river mooring in Rostov-on-Don, being in operation within more than 150 years are presented. As the fixture was possible to be taken from a design in a single copy, it wasn't represented possible to apply destroying test methods. Therefore mechanical characteristics of metal were measured by means of system of nondestructive control "Durability", developed at the Rostov state construction university and a portable tverdomer with ultrasonic and dynamic sensors. Approximate compliance of strength characteristics of studied metal, allegedly krichny iron is established, to characteristics let out now staly. Approximately on a fluidity limit studied metal corresponds to a limit of fluidity of St3 steel. The short analysis of loss of the area of live section of fixture and the forecast of possible further operation of a design in the assumption is made that conditions of this operation won't change.

    Keywords: non-destructive testing, mechanical properties, strength, diagnostics, a priori information, test the metal

  • Prefabricated low buildings made of composite materials

    The five industrial innovative building systems for the construction of low-rise buildings of the binary composite materials with a polymer or mineral matrix and particulate filler are proposed. Recommendations to reduce the time construction of buildings, taking into account the characteristics of composite products and modern technology installation sites using both traditional approaches, and due process of building robotics are given.

    Keywords: composite, matrix, filler, low-rise building, construction system, a universal set, "dry" construction, industrial robot, manipulator prefabrication building

  • Liveability new standards for sustainable development of the territory

    The article discusses the liveability as a key condition for sustainable development of territories, presents the criteria to assess the level of sustainable development of the area municipalities. The criteria of evaluation of the quality of the environment, as well as the interaction of the three components of sustainable development of the territory.

    Keywords: sustainable development of the area, comfortable environment, the stability of the system, the quality of the environment, spatial planning

  • Assessment of a residual resource of bridge cranes of box-shaped section

    Questions of definition of a residual resource of metal designs of bridge cranes are considered, the main aspects of a settlement technique of the assessment of a resource of cranes developed by VNIIPTMASh (Moscow), and also its program realization in the program MathCad environment are given. Results of inspections of cranes during the period from 2006 to 2010 are stated.

    Keywords: residual resource, bridge cranes, box-shaped section, operation, assessment

  • Assessment of a residual resource of bridge cranes of cross-shaped section

    In work questions of development of a technique of determination of size of a residual resource of bridge cranes of trellised section are considered. When developing a technique the accounting of dynamic nature of loading, deformations of racks and raskos, decrease in load ability of the bearing designs for a cause of wear of their constructive elements is made

    Keywords: bridge cranes, residual resource, rod designs, stability

  • Optimization of the form of step-prismatic bended beam

    We obtained the solution of the optimization problem for the step-parallel beam with constant width of the cross-section. The problem was solved by minimizing the strain energy while the volume of beam is constant. The solution was made for the case of simple support at the ends and evenly distributed along the length load. We introduced the parameter α, which is the ratio of height of the average part to a height of side parts. The optimal value of α was found. At this value the stiffness of the beam is maximum at constant volume. The obtained beam of maximum stiffness is not equal strength.

    Keywords: optimization, speed-prismatic beam, the strain energy, variable stiffness, minimum

  • Optimization of geometrical parameters of gable rectangular beam

    We solved the problem of optimizing the gable beam by minimizing the strain energy at constant volume. The problem reduced to an integral equation for determining the optimum angle of the beam. This equation was solved numerically by the method of bisection. Integral was calculated using the method of trapezoids. Solution was made in software package Matlab. The optimum angle depends on the width of the cross section b, and the volume of the beam. It was found that with increasing of width of the cross section the optimum tilt angle decreases. Also the volume increases by increasing the width of the beam.

    Keywords: optimization, gable beam, strain energy, variable rigidity, minimum volume, method of bisection

  • On the question of the duration of the functioning of the construction company

    The dynamic aspectIt is considered the actual problems of functioning of the organization in building evolutionarily dynamic aspect. Highlighted the problematic issues, analyzes them, are possible solutions.

    Keywords: organization and management of construction, synergy, construction economics

  • Organizational engineering

    Discusses the problems of organizational engineering. The review is carried out in the historical dynamics of the industry development. The expediency of application of innovative engineering in the industry.

    Keywords: systems of environmental economy, organization and management, environmental protection system.

  • Simulation of the design activity diversification of innovative enterprise

    The aim of the research was to develop a combined lining that would ensure long-term operation of underground workings in the chemical attack and high pressure groundwater. The problem of protection of groundwater is of particular importance for the mountain enterprises engaged in production of potash. Over the past 100 years in the world (Germany, Canada, Russia, and others.) Were flooded, more than 80 potash mines, including in Russia - mines BKRU-3 (1986) and BKRU-1 (2006) Verkhnekamskoye occurrence. The most commonly used lining of iron tubing does not provide the desired water resistance and durability. Disadvantages of steel lining supports identified based on the analysis of the experience of their application in Russia and abroad. The authors proposed a combination lining which consists of several layers of concrete or reinforced concrete and a waterproof layer of fiberglass. High strength, resistance to aggressive environments, the ability to provide complete waterproofing under relatively high cost of determining the benefits of the proposed lining. Calculations have shown that under certain conditions, the proposed construction of lining can effectively replace expensive cast-iron lining and steel lining.

    Keywords: mining, combined lining, fiberglass, concrete, iron tubing, steel lining

  • Strength and cracking resistance of module type "cap" with no floor slab

    Paper presents results of full-scale test to failure of reinforced concrete room-sized module type "cap" by static loading. Loading process, used testing facilities, loading and measuring equipment are described. Obtained data considering module's strength, stiffness and cracking resistance are given.

    Keywords: room unit, static loading test, data acquisition system, strain transducer