The article considers the task of combating the opportunistic behavior of a supervisor and agents in a river water quality control system. A three-level hierarchical model is being built, including the principal, supervisor and agent. Each of the entities seeks to maximize its objective function. The motivation method is used as a control method at both levels. The behavior of the system in the case of information regulations of the Stackelberg game is investigated. The substantiation of the derivation of functions used in the model is given. The results of model simulation under various initial conditions are demonstrated. An analysis of the results is given.
Keywords: Stackelberg balance, three-level system, motivation, imitation, opportunistic behavior, river water quality, hierarchy
In the paper, we propose a new efficient method for pricing barrier options in stochastic volatility models that can admit jumps. We use "local consistency" arguments to approximate the variance process with a finite, but sufficiently dense Markov chain. It results in a regime-switching Levy model with the dimension of the problem reduced by 1. In the regime-switching settings, we need to solve a system of partial integrodifferential equations subject to appropriate boundary conditions. To efficiently compute option prices conditioned on the variance states, we use an efficient numerical Wiener-Hopf factorization method. The method can be applied for the case of the Heston and the Bates models and other stochastic volatility Levy processes. Numerical experiments show that the approach suggested is in a good agreement with hybrid finite difference schemes and Monte Carlo simulations.
Keywords: mathematical modeling, options, numerical methods, Markov chains, stochastic volatility, Heston model
The article describes a model that allows to conduct research and justification of the choice of operating modes of departmental network information objects functioning in distributed data transmission networks in conditions of unauthorized actions aimed at overloading network information objects with incorrectly fragmented message packets. The developed model allows to formulate requirements on improvement of indicators of timely granting of service possibilities to subscribers of departmental data transmission networks and also maintenance of availability of the processed information in the conditions of high intensity of an exchange of message packets with incorrect parameters of fragmentation through monitoring of failures (failures) of defragmentation of message packets and adaptation of parameters of a communication route to change of structure (parameters) of a data transmission network.
Keywords: data network, departmental network information objects, IP datagrams, packet fragmentation
The article considers examples of cities with a linear-elongated configuration. Issues of air pollution are considered, examples of components of pollutants coming from stationary and mobile sources are given. Statistical data on human diseases in the Volgograd region for the period 2008-2017 are presented. Considers the issues of monitoring for the city of Volgograd.
Keywords: linear city, highway, pollution, carbon monoxide, monitoring, monitoring posts, disease statistics, combined action, vehicles, noise, gas pollution, health, exhaust gases, length
The article discusses the regulatory framework for the construction of houses for the disabled and the elderly. The main types of documents that are the main component of the regulatory framework are given. Excerpts and the main provisions of the current regulations on the presentation of requirements for sites, space-planning decisions, engineering equipment and adaptation of the environment for the elderly and disabled are considered. The compliance of the requirements with modern standards is analyzed.
Keywords: regulatory framework, construction, construction rules, homes for the elderly and disabled, codes of practice, adaptation of the environment
In this paper, we consider the aspects of identifying criteria for increased comfort of the territory of residential facilities. The concept of increased comfort is influenced by a variety of heterogeneous factors. However, a clear method for classifying these criteria has not been defined.The purpose of this work is to identify the criteria for increased comfort of a residential complex and study the features of the layout of these objects. This article discusses the qualitative and quantitative indicators that make up the concept of ""increased comfort"". The authors have studied the stages of organization of the territory of a high-comfort residential complex and their components. Parameters and environmental factors that influence decision-making in construction are identified. Functional zones of the territory of the residential complex of increased comfort are defined. In this paper, we propose a scheme that allows us to classify the criteria of increased comfort for a residential complex based on indicators of technical principles of organization and architectural and planning structure.
Keywords: residential complex superbly comfortable, the organization of the territory and architectural-planning structure, functional area
A method for increasing the production efficiency of ultra-lightweight refractory products is proposed, by optimizing the technology for preparing foam, which allows to release the products from the forms immediately after they are installed for drying. The plastic-viscous characteristics and stability of the foam can be increased by its mineralization, i.e. by introducing fine mineral substances into the foam-forming solution
Keywords: foam mass, mineralization, ultimate shear stress, plastic-viscous characteristics, ultra-light refractories, aluminum-potassium alum
This article discusses the possibility of using water wells for water supply of rice irrigation systems. The aim of the study of this work is to study the prospects for the possible use of water wells for irrigation of flood fields of the Krasnodar Territory. This issue has been studied by the example of a water well, which is located in the village of the Black Sea Seversky district of the Krasnodar Territory. The relevance of the study of this issue is expressed in the fact that of all types of agricultural nature management in the Krasnodar Territory, one of the most important types is rice growing. Naturally, in the field of rice production, irrigation sources play an important role, which, in our opinion, include water wells. The relevance of this study is associated with the importance of the production of rice groats, as one of the most important types of agricultural nature management in the Krasnodar Territory and the Republic of Adygea. Irrigation sources are of great importance in the field of rice growing, which consists in the fact that for the irrigation of flood fields, a large amount of water is required, providing a favorable environment for rice growth. At the same time, the quality of rice cultivated directly depends on the qualitative characteristics of the water resources used for rice systems. The value of irrigation sources is that a favorable environment for the cultivation of rice groats is created by water resources, which are used in large quantities for irrigation of rice fields. Water resources used for irrigation of flood fields have a direct impact on the quality of rice cereal, which is grown on irrigated fields. In this regard, there is a need to conduct a study of water resources extracted from water wells for their compliance with sanitary norms and rules, the results of which will be considered in this paper.
Keywords: siltation, reservoir, water resources, floodplain territories, rational water use, water resources
This article presents the development of pedestrian spaces in cities. It is about the methods of pre-design studies and an integrated approach to design. It is about the meaning and role of pedestrian streets in the enrichment of urban space.
Keywords: street, reconstruction, planning, urban planning, improvement
The article provides a brief overview of geomechanical methods for studying the stress-strain state of the soil mass and tunnel lining. The organization of monitoring in tunnels using conventional and fiber-optic systems is considered. Criteria for analysis of monitoring data and structural strength conditions are described
Keywords: railway tunnel, construction, operation, monitoring, strain gauge, stress, strain, strength, bearing capacity
The results of the development of a polymer protective coating based on oligopiperylene styrene binder for the protection of concrete and metal surfaces of structures of buildings and structures from the effects of adverse natural and technogenic factors are presented. Modification of this binder with tetraethoxysilane in an amount of 3-20 wt. including allows you to get a protective coating with good hydrophobic properties. Introduction to the composition of 1-12 wt. including tetraisopropyl titanate significantly improves the adhesive and strength properties of the protective coating, which is associated with the formation of bonds between oligopiperylene styrene and tetraisopropyl titanate, due to chemical interaction between the reactive groups of these compounds. The developed protective polymer coating provides good adhesion to the working surface, is easy to apply technologically, the curing of the coating occurs at room temperature, and the improvement of the strength and hydrophobic characteristics of the coating will significantly expand its field of application.
Keywords: protective coating, oligopiperylene styrene binder, tetraethoxysilane, tetraisopropyl titanate, adhesion, hydrophobicity, contact angle
This article is devoted to the study of a medieval temple Dating from the end of the X - beginning of the XI century, located near the village of datuna in the Republic of Dagestan. It discusses its design features, provides arguments about their possible purpose and symbolic load. Stylistic and semantic analysis is carried out, as a result of which conclusions are drawn about the ownership of construction traditions. The proportions of the temple underlying the compositional structure are analyzed. Based on the revealed proportions, an analogy is drawn with the temple of Solomon, with which other common features are found. As a result, it is concluded that it served as a prototype for the construction of the Dagestan temple.
Keywords: Datun temple, middle ages, religious architecture, Dagestan, proportions, single-nave Basilica, compositional structure, prototype
The calculation of a multi-storey monolithic building of a wall structural scheme for resistance to progressive collapse is considered. Calculations of the building were made for various operating conditions: normal and extreme (emergency impact — destruction of part of the load-bearing walls of the first floor). Recommendations are given for building protection in case of emergency impacts. It is determined that for buildings with a cross-wall system, the appropriate method of protection against progressive collapse is the method of reserving the strength of load-bearing elements. The increase in the cost of materials is about 2 %. Comparison of technical and economic indicators of buildings of wall and frame structural schemes showed that the cost of protection from progressive collapse of buildings with a wall structural scheme is significantly lower than that of frame
Keywords: progressive collapse, emergency impact, strength reservation, cross-wall design scheme, Lira-SAPR, building design model
The quality of construction affects the reliability and safety of the object as a whole, and its provision is an important and urgent task. This article discusses the issues of quality control at the stage of organizational and technological preparation of construction. The authors analyzed the current legal acts of the Russian Federation and regulatory and technical documentation in the field of construction organization, identified the main factors that affect the final quality of construction products. According to the report, the authors suggest that at the stage of development of POS and PPR to take into account the factors affecting the quality of the constructed facility, and to reduce the negative effects of organization control at all stages of building production.
Keywords: quality of construction, quality of construction products, organization of quality control, organizational and technological preparation, project of construction organization, project of work production
The paper reveals the problem and causes of the formation of fetid compounds in the systems of transportation and wastewater treatment. Various methods used at the moment to eliminate and neutralize unpleasant odors, as well as a number of measures to clean the air from fetid compounds are considered. A new method is described to prevent the formation of odors of fetid compounds in wastewater transportation and treatment systems and a device for its implementation using low-intensity cavitation. The scheme of the device for sewage treatment from smells of fetid compounds. The principle of operation of this installation is described.
Keywords: fetid compounds , air purification, biological purification, low-intensity cavitation
The article considers the historical experience of implementing infrastructure projects in the framework of concession agreements, in contrast to the classical form of interaction with participating states. Certain advantages and prospects of applying formal interaction between the state and the private sector.
Keywords: concession, infrastructure facilities, public-private partnerships, roads
The article presents an analysis of objects with concrete-filled steel tube columns. Also the article describes methods for solving the concomitant disadvantages and describes ways to increase the effectiveness of this solution. Prospects for studies of increasing the adhesive component of the mutual work of the concrete core and steel shell are presented. The analysis allows you to give recommendations on the following issues: improving the technological level of concrete-filled steel tube columns, the convenience of joining the column with the frame.
Keywords: concrete-filled steel tube columns, combined steel and reinforced concrete structures, tubular section, fixed formwork, steel cage, concrete core, adhesion of materials, side compression effect, frame building, construction in the low-temperature conditio
The results of the development of a polymer fire-resistant heat-insulating coating containing waste from electrochemical production for thermal insulation of hot metal surfaces of industrial equipment and building structures, working surfaces of pipelines are presented. The coating is developed on the basis of acrylic binder, hollow carbon microspheres, antifoam, pigment and flame retardant based on waste electrochemical production - galvanic sludge. The use of hollow carbon microspheres as a filler in the amount of 14.0 to 38.0 wt. including reduces the thermal conductivity of the coating, and the use as a flame retardant additive, pre-dried and finely ground galvanic sludge in an amount of 5 to 15 wt. h., gives the cured heat-insulating coating fire-resistant properties. Studies have shown that the use of this composition allows you to get a polymer heat-insulating coating with good physico-mechanical and flame retardant properties, while another problem is solved - the safe disposal of galvanic sludge.
Keywords: polymer heat-insulating coating, waste from electrochemical production, flame retardant, hollow carbon microspheres, galvanic sludge, fire resistance, safe disposal
The problem of managing municipal solid waste (hereinafter referred to as MSW) is annually complicated, due to the increase in the mass / volume of generated waste, the transformation of its composition and properties, the lack of economic resources in many countries for processing the bulk of the waste, and other reasons. The largest amount of MSW is generated and accumulated in residential and public buildings of various amenities and purposes, in enterprises, on the streets, in courtyards. Untimely disposal and disposal can lead to significant environmental pollution (hereinafter referred to as OS). One of the main stages of MSW management is waste collection. Therefore, the article presents a solution to the urgent problem of improving the environmental safety of urban areas with the aim of further using waste for energy supply based on the choice of an environmentally friendly and energy-efficient engineering system for collecting MSW.
Keywords: municipal solid waste, municipal services, waste management system, municipal solid waste collection, environmentally friendly waste collection, energy-efficient waste collection, environmentally friendly and energy-efficient engineering waste collection
The question of the possibility of using the well-known semi-empirical method for predicting settlements for underground transport tunnels of small diameter, taking into account correction factors developed for communication tunnels, is being investigated. The relationship between the ratio of the relative depth of laying and settlement of the surface and the selected ground loss volumes is considered.
Keywords: tunnel, volume loss factor, empirical method, finite element model, ground settlement, shielded tunneling, TBM, Tupikov’s correction factor, numerical method
The reconstruction of the basement of a two-story brick building is considered. The reconstruction of the basement was preceded by a technical inspection of structures and elements, which revealed damage. The condition of the basement structures was assessed, the causes of damage were identified, and a project was developed to eliminate them. The main tasks of the reconstruction included: eliminating the facts of flooding by waterproofing the walls and floor of the basement, developing a recipe for dry mix for shotcrete, eliminating the identified damage and reconstructing the basement walls.
Keywords: basement, flooding, water resistance, strength of concrete under compression, cement, silica fume, organo-mineral complex additive
The article is devoted to the use of natural minerals in water treatment. The paper presents the results of a study of the sorption properties of the opoka. The study showed the advantages of flask membranes compared to those deposited with silicic acid. The optimal conditions for the modification of the flask were determined, which make it possible to purify water from metal impurities to the required level.
Keywords: groundwater, water purification, deferrization, membrane, deposited membrane, sorption methods, flask, polyacrylamide
The paper explores the opportunity to use tower cranes with a large boom length for installation of space frames configured as prefabricated units. The opportunity to modify the already existing technology by using new tower cranes with a large boom length allows cutting the cost of construction of industrial buildings with flat structural plates. Cost cuts are realized by reducing the scope of works pertaining to installation and dismantling of crane runway as well as crane relocation toward other spans of the building.
Keywords: space frames, nodal connections, installation, technology, modification, crane
The effective use of high-strength reinforcement in reinforced concrete structures is an important task today. In order to reduce the consumption of materials, especially steel, it is necessary to use high-strength materials more widely in the production of reinforced concrete structures. In recent years, researchers have significantly increased interest in reinforced concrete structures with mixed reinforcement. To determine the effect of the concrete class on the bearing capacity of reinforced concrete columns, a numerical experiment was performed. According to the results of the experiment, it was found that the maximum increase in bearing capacity with all variants of relative eccentricity is observed in racks with previously stretched and non-tensile reinforcement. Thus, the studies showed that the use of columns with mixed reinforcement is advisable. The use of mixed reinforcement in reinforced concrete racks in all cases is more effective than racks with non-tensile reinforcement.
Keywords: concrete, reinforcement, reinforced concrete, prestressing, the relative eccentricity, mixed reinforcement, column, bearing capacity