bluuebunny/crossref_metadata_2025_split huggingface dataset:
Telemetry in the life support system of an intelligent building
Authors: Mokrova Natalia , Alyoshintsev Andrey , Sak Alexander 
Published: January 2021

Abstract
The automated system of control and management of life cycle of an intelligent building and, in general, of the Smart City requires high-quality supervision, control and preventive maintenance to handle water supply networks, delineation of operating balance and responsibility for engineering networks functioning and structures between suppliers and consumers, ensuring water analysis.
This article discusses the advantages of a module that sends data to telecontrol in real time and allows to solve problems such as: continuous and comprehensive monitoring of the state of a remote DWI (Drinking Water Intake) object; remote control of the object; remote control of the actions of the staff; automatically preventing personnel from incorrect actions; increasing the level of organization of energy accounting, efficiency and reliability of obtaining information; improving safety, production culture and improving working conditions; obtaining detailed information about the parameters of the power grid, the electrical equipment operation and the implementation of dispatching control in real time; optimization of technological modes of operation.
The study can help reduce the number of accidents at facilities and improve work efficiency as well as solve the issues of work by providing the equipment with new devices, such as MCU series controllers.
Construction of mathematical model for the controlled dynamics of connected bodies system in robotics
Authors: Polyanina Anna 
Published: January 2021

Abstract
Differential-algebraic equations for describing the motion of connected bodies sys-tem are considered. The dynamic model includes geometric and nonholonomic connections. The connections equations contain second-order derivatives of the system coordinates. The in-fluence of connections by the system is taken into account using Lagrange multipliers. Pro-posed equations of controlled motion can be used in the development of algorithms for model-ing the motion of mechanical systems, in particular, in the construction of control systems for cyclic motions in robotics. To construction, solve a mathematical model using software pack-ages, it is necessary to obtain the equations of motion for all components of connected bodies system. The presence of many numbers of walking robots mobility degrees makes the task of their creation and control more difficult. The synthesis of control systems for such devices is reduced to stabilizing the motion of the robot body. Algorithm for setting the trajectory de-pends on the relative motion of a point on the body from the point of the foot. The body makes uniform rectilinear motion while the foot makes periodic motions.
Methodology for calculating previously unaccounted for heat losses of internal hot water supply systems
Authors: Hurgin Roman , Nosorev Evgeniy 
Published: January 2021

Abstract
For a long time, design engineers calculated heat losses according to the method proposed in SNiP 2.04.01-85*, i.e by multiplying the specific value of heat losses per unit length of the pipeline. While this methodology is good enough for simple calculations, it lacks in preciseness, which in turn can lead to an overengineering of the hot water system. In 2017, SP 30.13330.2016 was introduced, in which the calculation of heat loss by pipelines of the hot water system from SNiP was changed to include previously unaccounted for heat losses that were not calculated. Now this methodology almost fully reflects the physical processes of heat transfer, considers the corresponding design parameters, and delivers more precise calculations, than SNiP methodology, which in turn allows to account for precise numbers of heat loss in hot water system. Detailed analysis of formulas and their components will provide better understanding of processes which affect heat losses in hot water systems.
The assessment of technical -economic efficiency of Sequencing Batch Reactors in municipal wastewater treatment in developing countries
Authors: Quan Tran Ha , Gogina Elena 
Published: January 2021

Abstract
The Sequencing Batch Reactors (SBR) is a variation of activated sludge and has been wide applied in wastewater treatment since 1920s. The advantages of this technology are not only the high performance in low or varying flow patterns but also present worth cost for a long time. Therefore, the article evaluates the technical -economic efficiency of this technology in municipal wastewater treatment from combined sewerage system. Based on building and operation pilot SBR with process Nitrification/Denitrification and bio-film in municipal wastewater treatment plan for 1 months, the technical -economic efficiency has been determinates. Firstly, the efficiency removal pollutants is more stable and the quality of pilot’s effluence achieved Russian Standard about treated water. After that, the environmental damage has been decreased for 8 – 11 time, especially damage from nitrogen ammonia and nitrate. At least, the calculation from economic factors of SBR has been showed that the cost of treating 1 m3 wastewater than 0.5 USD when optimized this technology by process Nitrification/Denitrification and bio-film.
Investigation of scaling mechanism on reverse osmosis membranes using «fluorescent» antiscalant
Authors: Golovesov V A , Pervov A G , Smirnov A D 
Published: January 2021

Abstract
Scaling of sparingly soluble salts could be recognized as a main factor that limits wide application of reverse osmosis (RO) membrane facilities in drinking water production and industrial water recycling. The report demonstrates a new approach to evaluate scaling rates and antiscalant behavior in commercial membrane spiral wound modules through the use of the fluorescence-tagged antiscalants and laser scanning confocal microscope (LSM) observations. Throughout the conducted study the “visualization” of scale inhibitors behavior appeared to be a very promising and universal tool for their activity understanding. Examination of membrane surface and calcite crystals in autopsied membrane modules demonstrated new unexpected results: antiscalant adsorbed either on membrane surface or on crystal surface. In the presence of calcium ions during ground water treatment antiscalant was adsorbed only on crystal surface and sorption on membrane was not detected. Fluorescence was more intensive on the surface and on the outer edges of crystal surface than inside crystal. To investigate antiscalant adsorption to membrane surface, experiments with distilled water containing antiscalant were performed. Intensive sorption of fluorescent inhibitor molecules to membrane was observed.
Strategies ensuring the Stability of Natural and Urbanized Biotopes in hybrid multifunctional objects
Authors: Zaykova Elena 
Published: January 2021

Abstract
The typology and strategies for integrating hybrid multifunctional objects into the urban fabric will be presented in the article. The dominant feature of the third group is the hybridization of functions between the building and the environment based on blue – green technologies for the sustainable development of urban areas and urban management. Three groups of hybrid objects have a compact and dispersed influence in different parts of the city. In the process of urban territory restructuring, the question arises of preserving and maintaining a natural or urbanized biotope, either by using natural components or by imitating natural communities using new technologies. Thus, different types of phytocenoses are formed in hybrid objects, which need to be preserved and adapted to the new socio-cultural and economic scenario of urban life. Artificial forms of urban nature require new strategies for the development of territories at different urban planning levels and in different parts of the city. Therefore, the topic of the article is of interest to a wide range of specialists.
Analysis of world and domestic experience in the use of XML schemas in the implementation of information interaction during maintaining the information model of a capital construction object
Authors: Chelyshkov Pavel , Volkov S A , Babushkin E S 
Published: January 2021

Abstract
The lack of integration solutions for transferring data according to the information model of the capital construction object or certain parts of the information model between different systems (for example, from the customer to the expertise, from the contractor to the State information system for the provision of urban planning activities (GISOGD) or other state information systems) leads to the loss of data and important information stored in the information model, which accounts for reproduce or transmit in native format without the possibility of data processing by the information system. The purpose of this article is to analyze the world and domestic experience of using XML schemes for organizing the processes of transferring and storing structured data in information systems (including government ones) and software with a reasonable selection of best practices.
Evaluation of the deformability of balcony plates of monolithic residential buildings
Authors: Malakhova Anna , Malakhov Dmitry 
Published: January 2021

Abstract
The calculation and design solutions of balconies of modern monolithic residential buildings are considered. Such balconies are part of a monolithic floor slab, which relies on internal supporting vertical structures. They have a larger extension, and when using brick walls to fence balconies -and more loading. The experience of operating monolithic residential buildings with balconies with their removal of 1.2 … 2.5 m and a brick balcony railing with a two-chamber stained-glass window showed the possibility of increased deformations of the balcony cantilever sections of the floor slabs of such buildings. If for such balconies the maximum deflection provided by the project for the balcony cantilever sections of the slab will be close to the maximum permissible values, then deviations from the design that were allowed during the construction of the building (reducing the class of concrete versus design, changing the location of the working reinforcement of the slab during concreting) can lead to increased deflection of balconies. Computer modeling allows you to accurately reflect the real work of the structure, and performing calculations in a nonlinear setting -to obtain an adequate deflection of the console balcony slab. The main approaches to modeling the design scheme of a flat floor slab with a balcony part are considered for determining plate deformations taking into account non-linear deformation of materials, as well as taking into account plate reinforcement.
The problem of mathematical modeling of a vibration protected rod under kinematic exitations
Authors: Mirsaidov Mirziyod , Dusmatov Olimjon , Khodjabekov Muradjon 
Published: January 2021

Abstract
In this paper, we consider the problem of mathematical modeling of nonlinear vibrations of a rod with distributed parameters and elastic-dissipative characteristics of the hysteresis type, and also having a liquid section dynamic absorber under kinematic excitations. The method of obtaining the differential equations of motion of the system protected from vibrations under consideration in the work using the structural method -the method of bond graph. An expression is obtained for the transfer function of a vibration-protective system for analyzing the dynamics and stability of the system and evaluating the effectiveness of a dynamic absorber.
Geometrically nonlinear analysis of a flexible wire (chain)
Authors: Suvorov Alexander 
Published: January 2021

Abstract
In this work the deformation analysis of a flexible cable is considered in detail. Nonlinear finite element analysis is used for solving the problem. In deriving the final form of equations, geometrically nonlinear analysis is used and validity of simple Hooke’s law is assumed. The resulting nonlinear algebraic equations are solved by using simple iteration method. Numerical examples are considered.
Vibrations of multilayer composite viscoelastic curved pipe under internal pressure
Authors: Safarov Ismoil , Teshaev Muhsin , Yarashev J A 
Published: January 2021

Abstract
The paper presents a mathematical statement and the methods to solve the problem of natural vibrations of thin-walled multilayer composite viscoelastic curved pipes under internal pressure. A brief overview of well-known publications devoted to this problem is given. The stress state and flexibility of the pipes are investigated for two types of boundary conditions, taking into account internal pressure and viscoelastic properties of the material and geometrical and physical parameters of the pipe. The paper provides the results of numerical analysis of the spectra of the lower complex eigenfrequencies of the pipe depending on internal pressure, geometrical, structural parameters, rheological properties and boundary conditions. Ten lower eigenfrequencies were found and the corresponding vibration modes constructed. The paper presents a comparison of solution results with known solutions and experimental results.
Mathematical modelling in tasks of predicting the operational reliability of gas networks facilities
Authors: Orlov Viktor , Detina Elena , Kovalchuk Oleg 
Published: January 2021

Abstract
This article offers a technology for studying accidents at gas networks facilities using mathematical models. In the constructed mathematical models, time series were research to obtain a forecast of accidents for the considered period of time. Forecasting was carried out using the method of variance analysis, which allows to obtain a qualitative version of the forecast. The confidence intervals of the forecast values obtained are they agree well with statistical data on emergency situations on gas pipelines. The developed methodology helps to increase the effectiveness of measures aimed at reducing negative crash factors and improving the operational reliability of gas networks facilities.
Research of the bearing capacity of a augered pile with expansion along the pile body
Authors: Chunyuk D Y , Van Hung Tran 
Published: January 2021

Abstract
Augered piles are used to reinforce the soil and connect to the foundation to ensure the sustainability of the project. This is an advanced method that can support large structures on soft ground. Augered piles are one of the most widely used structural solutions for foundations used by designers for high-rise buildings, in projects with heavy loads, bridge construction and for buildings located on soft soils. Due to their hability to withstand heavy loads without affecting neighboring buildings when constructing foundations, bored pile foundations are increasingly being used in civil, industrial, and bridge and road projects in Vietnam. Geotechnical conditions in Vietnam are mainly represented by soft soils, so many engineers are working to optimize the section of the augered pile to increase their bearing capacity. However, studies of augered piles capable of expanding the body of the pile to increase the bearing capacity along the side surface and reduce the volume of concrete have not been carried out. Investigation of the type of augered pile with the above characteristics is one of the most important tasks. The load on a augered pile, with widening along the body of the pile, increased from 15.4% to 20.8% compared to a conventional augered pile with the same total volume, and the same precipitation. The load on a augered pile with widening along the body of the pile increases from 15.4% to 20.8% compared to a conventional augered pile with the same volume of concrete. For augered piles with expansion along the body of a pile with the same outer diameter (D1200mm), as compared to conventional augered piles, the load decreased by 241 (tons), equal to 7.94%, but the volume of concrete decreased by 19.8 m3, which is equivalent to 37, 4%.
Solution of the problem of rotation of a homogeneous disk by the variational method, the apparatus of vector analysis and the finite element method
Authors: Saiyan Sergey , Modestov Konstantin 
Published: January 2021

Abstract
This work considers two global approaches to obtaining solutions to problems in mechanics: analytical and numerical, their division into various methods, allowing a more flexible approach to the choice of optimal methods for obtaining solutions to problems of continuum mechanics. Analyzed the effectiveness of various analytical methods for obtaining resolving continuum mechanics. In particular, the derivation of differential equations of equilibrium from the condition of minimality of the potential energy of elastic deformation of a solid, as well as the mathematical apparatus of vector analysis of classical field theory. In addition to the analytical solution, a numerical solution of this problem was presented by the finite element method, performed in the ANSYS Mechanical APDL software package, followed by verification of the obtained simulation results with the results of the analytical solution.
Optimization of bearing capital of structural roof slab
Authors: Vasilkin Andrey 
Published: January 2021

Abstract
The problem of exploring the optimum alternative of bearing capital of structural roof slab design solution is set and worked out in the article. As a method of searching for the optimum alternative, the parametric optimization method is used. Previously, a number of examples illustrate the application of this method. Then one variable parameter is chosen so that its changing provides a graph of objective function behavior, which in turn provides an optimal constructive solution according to the assumed optimality criterion. Constraints of the problem are strength and sustainability regulatory requirements and also a number of design parameters. Metal consumption was assumed as an optimality criterion. The work presents efficiency and relevance of optimization procedures while searching for design solutions at the early (conceptual) stage of design, which provide for an engineer the necessary information to choose reasonable design solutions based on options analysis.
The mutual influence approach during the resource allocation process in construction projects
Authors: Dayoub Nbras , Fakhratov Muhammet 
Published: January 2021

Abstract
Project scheduling is one of the most important stages of construction project planning, which can be divided into several tasks. Resource allocation is one of them. Resource allocation plays an important role in defining and forming the appropriate implementation plan that achieves the best cost and quality within the shortest possible period. This paper aims to provide a practical approach that helps the project planner in performing the resource allocation process in the manner that achieves the most benefit and effectiveness based on actual values, the use of databases and a mathematical analytical model. The results showed that the proposed model can provide significant benefit in the process of resource allocation and risk management, and that it is flexible to support decisions during decision-making processes.
Methodical approach to assessing the energy efficiency class of an industrial facility based on an expert opinion
Authors: Verstina Natalia , Meshcheryakova Tatiana , Shchepkina Natalia 
Published: January 2021

Abstract
The article examines an expert survey as the effective way to obtain information which is necessary to form a unified statistical information base of industrial facilities in terms of their energy efficiency. The conceptual model for developing a methodology for the expert survey of leading Russian and world experts in the field of energy efficiency and energy saving is presented. The model reflects the main elements which should be taken into account when conducting it. The toolkit for conducting the survey is proposed, which determines the basis for the classification of industrial facilities according to their level of energy efficiency. The analysis of expert opinions will make it possible to draw unambiguous conclusions to the overall opinion issues of the study and reach a consensus on its key problems.
Funding: The reported study was funded by RFBR, project number 20-010-00754
Asymptotics of inverse filtration problem in porous media
Authors: Kuzmina Liudmila , Osipov Yuri , Tzariova Victoria 
Published: January 2021

Abstract
Filtration problems arise in the design of tunnels and underground structures. A one-dimensional filtration model of a monodisperse suspension in a homogeneous porous medium is considered. For a general nonlinear filtration function, an asymptotic solution is constructed behind the concentrations front of suspended and retained particles. It is shown that the asymptotics is close to the numerical solution. Comparison of the asymptotics with the suspended particles concentration at the outlet of the porous medium allows solving the inverse filtration problem on finding the nonlinear filtration function. The proposed method allows to obtain the filtration function based on the results of standard laboratory experiments.
The influence of experimental studies on the stability of hydraulic structures
Authors: Aldungarova Aliya , Sarabekova Ulbossyn , Zhusupbekov Askar , Tanaka Tadatsugu , Tanzharikov Panabek 
Published: January 2021

Abstract
The article shows the main causes of accidents dams, including the effect influence of the undermining of territories. The aim of this work was to evaluate the possibility the formations in the model of the dams a cracks with certain areas of their distribution, as well as the degree of influence of reinforcement on their overall stability. Failure analysis shows that the reliability of these types of structures is different and depends on the uptime of individual subsystems. For soil dams, the largest number of failures is associated with filtration problems in the body and foundation of the dam during emergency floods. The decrease in stability and the increase in the development of crack formation during deformation of the soil base is greater, the greater the horizontal and vertical deformation of the soil. The effect of the reinforcing effect during stretching of the soil base, i.e. reinforcing the soil dam with geotextiles significantly affects the increase in stability and the decrease in the development of cracking during deformation of the soil base.
Hydrodynamic effects on the flow elements of the downstream devices in the presence of cavitation
Authors: Obidov Bakhtiyor , Vokhidov Oybek , Tadjieva Durdona , Saidkhodjaeva Dilsora , Kurbanova Umida , Isakov Alisher 
Published: January 2021

Abstract
The use of “erosion-free” energy absorbers operating during cavitation without the formation of cavitation erosion extends the use of energy absorbers and diffusers at high flow rates, removing or reducing cavitation restrictions. Considering that energy absorbers are effective means of preventing dangerous malfunctioning currents in the downstream, they make it possible to increase the water level and reduce the cost of fastening the downstream. Give the opportunity to expand the scope of their application should be taken into account when designing. Dampers of this type were used at the spillways of the Shamkhor and Artyom waterworks.