bluuebunny/crossref_metadata_2025_split huggingface dataset:
Automation of control of parameters of batteries in the process of their tests and operation
Authors: Ermakov A V , Fedorov A F , Chekster O P , Atlasov R A 
Published: November 2019

Abstract
The article discusses technical solutions that allow one to comprehensively automate the processes of discharge and charge of accumulator batteries by applying methods of adaptive combination of electronic and resistive loads, control of their resistances and computer processing of the obtained measurement results. All these solutions reduce laboriousness of testing batteries, eliminates the human factor in registration of their results, provides possibility of implementing a continuous objective control of battery parameters, accumulation and subsequent analysis of the information about the characteristics of accumulator batteries to optimize their operation modes. The described device can be useful to those who sell batteries or power supply equipment complete with batteries, as well as to those companies that have distributed or remote objects with batteries and want to monitor the status of batteries with minimal need for qualified personnel.
Zone phase rectifier with fractional number of zones
Authors: Ivanov V V , Myatezh S V , Kapustin A V , Alekseeva I K 
Published: November 2019

Abstract
In the work, simple provisions of the structural synthesis method are used to create new controlled three-phase AC rectifiers with a fractional number of zones. The capabilities of the method are demonstrated by the example of obtaining a simple three-phase two-zone rectifier. The analysis of operating modes indicates the achievement of high energy performance. Calculated expressions setting the relationship between the medium-straightened voltage and the value of the SPD opening angle delay for different zones are obtained. The possibility of rectified voltage smooth regulation relative to the current value of the phase winding voltage is shown: in the first zone from 0 to 2.34, in the intermediate fractional zone from 2.34 to 3.7, in the second zone from 3.7 to 4.68. Due to the intermediate fractional zone, partial overlaps in the specified voltage ranges are allowed.
Measuring system for studying quality of welded joints of titanium plates by using subminiature eddy current transducers
Authors: Dmitriev S F , Sagalakov A M , Ishkov A V , Malikov V N , Grigorev A A 
Published: November 2019

Abstract
This article contains the main technical information on the eddy-current transducer (ECT) used. This article describes the measurement procedure to control welds of titanium alloys, including the use of two supermimiature ECT, one of which is to be fixed above the weld, and another is to be used directly for scanning. The experimental results obtained by means of the developed measuring system for samples of various titanium plates joined by welds are presented. Likewise, a poor-quality weld can also be detected by a dramatic drop in amplitude of the signal when scanning the weld / welded material. The article presents the results of studies of titanium samples joined by a faulty weld, samples joined by a completely faulty weld, and also samples joined by a defect-free weld. The obtained dependences make it possible to determine the quality of the weld by the signal of an eddy-current transducer and to draw a conclusion about the reliability of welding.
Significance estimation of the rejected part of the signal spectrum from the magnetometer sensors of the prototype of the AIST small spacecraft
Authors: Sedelnikov A V , Safronov S L , Khnyryova E S 
Published: November 2019

Abstract
The paper presents the results of the investigation of the significance of the rejected part of the signal spectrum obtained from the magnetometer sensors. Sensors were installed in the prototype of the AIST small spacecraft. The measurement interval of the sensors significantly limited the spectral range of the measured signal from 0 to π / 6 rad/s. The problem of significance of the signal spectrum rejected part was solved by restoring an analog signal from its discrete readings using the Kotelnikov series. Then the spectrum of the restored signal was constructed. In addition, the interval of simulated measurements was significantly reduced. Significance estimation of the rejected part of the signal spectrum allows us to make a conclusion about the accuracy of the signal restoration from the raw data. The results of our work can be used in estimating various characteristics in cases of abnormal operation of measuring devices or spacecraft’s degraded performance.
Modelling and analysis of functional modes of active compensators in distributed generation systems
Authors: Sychev Yu A , Abramovich B N , Zimin R Yu 
Published: November 2019

Abstract
The modelling and analysis of functional modes of active compensators in conditions of distributed generation are presented in the paper. The functions of uninterruptable power supply, harmonic compensation, power factor correction by means of the shunt active compensator with the output passive filter and the common direct current link with the load power converter are detected during modelling. The dependences, which help to properly choose the structure and main parameters of the active compensator for implementation of the mentioned functions, are obtained during modelling. According to the modelling results the structure of the shunt active compensator is proposed and proved for conditions of distributed generation and combined power supply systems.
Study of influence of test case parameters on test suite optimality in order to automate the information systems design process
Authors: Artyukhova A S , Rodzin S I 
Published: November 2019

Abstract
The paper presents data on the influence of test parameters like average execution time, number of runs, test’s severity and complexity, number of related bugs on test’s optimality to include a test set for regression testing of information system software components. The paper includes research using such methods as analysis of variance, correlation and regression analysis of test parameters. The studies have shown a degree of the influence of test’s parameters to test suite efficiency and optimality in order to perform regression testing. Solving the problem of creation of optimal test suites aimed at regression testing gives a chance to automate the information systems design process.
Digital city: the characteristics of development indicators of new technologies
Authors: Kurcheeva G I , Klochkov G A , Aletdinova T A , Lapina A A 
Published: November 2019

Abstract
There is a need in modern society for regular monitoring of changes in the quality of life of the population as an important criterion for the effective management. Monitoring today is one of the main parts of any project. The authors identify indicators that reflect the introduction of smart city technologies and the corresponding possible implementation of new technologies based on such concepts as inter-machine interaction (M2M) with a centralized management server and blockchain network organization. Monitoring, because of its focus on tracking a process, becomes the basis for making decisions in investment distribution. It makes recommendations that will allow one to move away from considering the static state of the processes and adjust the development of the “smart city” trends.
Economic-mathematical simulation modeling of management and innovative activities of the industrial enterprises
Authors: Shanin I I , Boris O A 
Published: November 2019

Abstract
The essence of transformational processes which happen in the Russian economic system now consists in “diffusion” of innovative business in the system of the economic factors causing changes in the market relations. These transformations, first of all, are shown in acquisition by production and the market of social orientation. Respectively more and more relevant are socially oriented innovative enterprises (SOIE) which are developed and introduce in production the new technologies and products making long-term positive impact on level of quality of life and welfare of the population. When carrying out imitating modeling processes of economic-mathematical modeling can be divided into a number of stages: identification of an object, the specification of model, identification and assessment of specific signs of model, definition and check of interrelations between them, and their configuration, the mathematical description. At the same time all cycle is usually repeated several times, and in each cycle the mathematical model is specified, in particular, if it is about the model important for practical calculations. In this case additional requirements for implementation of algorithmic technology and programming are imposed to it. For achievement of goals in a research the mathematical description on the basis of the device of matrixes is used. In the course of carrying out economic-mathematical modeling the matrix device at creation of mathematical matrixes was used, for the description of type socially oriented business of structure of holistic management.
The application of Krone model to describe the production facilities of the Industry 4.0 smart factories
Authors: Zakoldaev D A , Gurjanov A V , Shukalov A V , Zharinov I O 
Published: November 2019

Abstract
An actual task is to synthesize project solutions of production facilities of the synthesis of Industry 4.0. Project solutions is based on the description of digital production and its functionality. The description must be based on the Krone model. The Krone models use morphological tables to create general descriptions. This approach supposes the modified model of Krone when the morphological tables are changed with mathematical matrices. A mathematical apparatus of algebra may create the automatic processes descriptions to generate project solutions to create a production facility of the Industry 4.0. A scheme of the Krone model components may interact where you can use multi-parameter criteria. You may generate a project solution to create a digital production facility with given optimal requirements. It is clear that the synthesis of the digital production model must be done after the creation of construction, program and technological documentation for an item designing component. A perspective way of digital production projection is a way of automatic generation of project solutions being done with a mathematical apparatus of genetic algorithms.
Education management to prepare the specialists for the industrial companies Industry 4.0
Authors: Zakoldaev D A , Shukalov A V , Zharinov I O , Grunicheva Ja V 
Published: November 2019

Abstract
The task is to organize specialists training for working in the industrial companies Industry 4.0. The companies have technological equipment (cyber and physical system) and informative technologies which future specialists will use. To work in the Industry 4.0 company the personnel must highly-qualified and have knowledge and skills in the field of new professions. The specialists must be trained at educational institutes having practical programs. There is a scheme of infrastructure ecosystem of production and educative components to prepare the specialists for the Industry 4.0 companies. There is a scheme how educative program components interact after the education projection and when the students have taken the programs. The ecosystem for preparation of specialists of the Industry 4.0 company has some professional and educative standards where the student competence is in accordance with workers of industrial companies.
Utilizing the 3D modeling technology to design a welding fixture
Authors: Fedorov A L , Mkrtychev S V , Enik O A 
Published: November 2019

Abstract
The article discusses utilizing the 3D modeling technology to design a welding fixture for the mechanical engineering industry. To improve the efficiency of the design process, we used the NX computer-aided design (CAD) system as a design tool. We describe the process of developing 3D models for individual components of a welding fixture with the said system. The possibilities of utilizing the created 3D model to analyze the finished product in kinematics by means of the NX system are considered. An algorithm to compute the parameters of the welding fixture using the finite element analysis (FEA) is described. As evidenced from practice, utilizing the 3D modeling technology allows design engineers to significantly reduce the time spent on a welding fixture design and implementation at a machine-building enterprise.
Computer-aided analysis of system dynamics models
Authors: Shornikov Yu V , Popov E A 
Published: November 2019

Abstract
The system dynamics methodology originally developed by J. W. Forrester for modelling and simulation of decision-making processes at enterprises is nowadays applied to many different fields, such as transportation, ecology, healthcare, biology, economics, etc. Instead of traditional flow diagrams and equations in the DYNAMO language, a block-textual specification is proposed. This form is considered to be more convenient for engineers familiar with control engineering. A model of transportation of kimberlite ore created in the modelling and simulation environment ISMA is given in order to illustrate the approach.
Quality assessment of the internet portal academic unit of the higher educational establishment with the help of the fuzzle set
Authors: Stativko R U 
Published: November 2019

Abstract
The article focuses on the importance of education. Education is presented as an educational service regardless of the type and method of receipt. The components of the educational service are indicated as a combination of the educational component, the managerial component and the financial and economic component of the educational institution. A scheme describing the complexity of decision making by the consumer of educational services is presented. It concerns the need to expand positions in the Internet space of the higher educational institution. The components are listed and a diagram is presented containing a list of the necessary components that make up the Internet portal of a higher education institution. The approaches to the evaluation are given, the choice of the apparatus of fuzzy sets is justified, which allows one to evaluate indicators of a different nature in one numerical scale. A system of indicators has been proposed, the value of which is most significant for the consumer of educational services, but cannot be independently assessed due to the complexity of the task. The approaches to assessing the quality indicators of the educational unit of the Internet portal of the educational organization, as a tool to enhance competitiveness in the market of educational services, are considered. The choice of the type of the membership function was determined and an approach was proposed for obtaining estimated values of indicators affecting the quality of the educational unit of the Internet portal of a different nature in a single numerical scale.
Numerical implementation of the Lame equation with complex boundary conditions
Authors: Sorokin S B , Maksimova A G , Lazareva G G , Arakcheev A S 
Published: November 2019

Abstract
A discrete model is constructed for calculating the Lame equation with complex boundary conditions. The model is tested on an analytical solution. A complex boundary condition arises when a microcrack is specified on one of the boundaries. Calculation of microcracks will enable better assessment of the relevance of the simulation and finding out which mechanisms will occur in the case of plasma flow heating in modern plasma and future thermonuclear installations.
On sub-Alfven MHD flows with acceleration in coaxial channels
Authors: Stepin E V 
Published: November 2019

Abstract
Magnetohydrodynamic (MHD) flows in coaxial channels of plasma accelerators with a longitudinal magnetic field are considered. Sub-Alfven MHD flows with acceleration transonic to the slow magnetosonic speed are studied. Sub-Alfven MHD flows are related to the case when the plasma flow velocity doesn’t exceed the Alfven speed corresponding to the longitudinal field along the channel. A narrow coaxial nozzle channel with a constant lower bound is considered. The non-stationary and stationary mathematical MHD models are considered in the quasi-one-dimensional approximation. The corresponding MHD problems are solved numerically. Features of the relaxation process and characteristics of the transonic sub-Alfven flow type with acceleration in the channel are studied. The influence of the longitudinal magnetic field on the steady-state plasma flows are researched. The mechanism of energy transformations is described.
3D numerical modeling of the plasma beam expansion using the MHD-kinetic approach
Authors: Vshivkova Lyudmila , Vshivkov Konstantin , Dudnikova Galina 
Published: November 2019

Abstract
In the current work a three-dimensional numerical model of a plasma beam expansion in the background plasma based on the kinetic description of an ion plasma component is proposed. To describe electrons the magneto-hydrodynamics equations are used. The Vlasov kinetic equations have been solved using the particle-in-cell (PIC) method. The finite-difference schemes have been utilized to solve the Maxwell system of equations and equations for electrons. The series of computations have been carried out to study collisionless mechanisms of the plasma flow interaction and a structure of the generated waves dealing with the conditions of laboratory experiments on the facility of ILP SB RAS.
Correlation of urban built form, density and energy performance
Authors: Ahmadian Ehsan , Sodagar Behzad , Mills Glen , Bingham Chris 
Published: November 2019

Abstract
In order to optimize the energy consumption in cities and enhance the potential of using renewable energy sources, the form of the city is considered as an influential factor. Numerous indicators have been used to analyse the effect of density and other characteristics of urban form on energy use. The paper presents results of an investigation into the relationships of building energy performance with two important urban density indicators, namely site coverage and volume-area ratio. Generic mathematical model of pavilion urban built form has been developed in order to compare and contrast its land-use/density characteristics with energy performance. Energy analysis has been performed on geometrical models using urban simulation software. The relationship between energy and density indicators are compared by considering an important variables, namely plan depth, cut-off angle and number of storeys. The city of London, representing a temperate climate, is considered as a case study. According to the results, high-rise buildings with deeper plans achieve higher energy efficiency. However, in case of including PV energy generation, low-rise buildings with deeper plans illustrate better total energy performance. Graphical results provide urban planning guidelines that can be used by urban designers, planners and architects to facilitate the most energy-efficient built form density for promoting more sustainable cities.
A novel decision support tool for climate-responsive urban design
Authors: Zhong Sailin , Nevat Ido , Acero Juan Angel , Rüfenacht Lea Alexandra , Jan Perhac , Koh Elliot 
Published: November 2019

Abstract
With the increase of temperature, a tropical country like Singapore will face the challenge of mitigating the anthropogenic heat emissions and urban heat storage to maintain its quality of urban life. However, due to the complex nature of climate and urban fabric, it is difficult for urban planners to make climate-sensitive informed decisions on how to achieve better Outdoor Thermal Comfort (OTC) in an intuitive while holistic way. We develop a holistic and principled decision process via an implementation of a decision support tool which interactively visualizes how climatic factors, urban design scenarios, importance of spatial use, and various acceptability criteria impact the OTC assessment in a simple step-by-step manner. The advantage of this tool is that it serves as an agent-based climate-responsive urban design system that presupposes planner’s trust. A complete working example is provided which demonstrates how a user could choose the optimal scenario for a new public housing estate located at the northeast of Singapore.
An integrated, agile approach for estimating solar radiation on building facades in complex urban environments
Authors: Mahmoud Eldesoky Ahmed Hazem , Colaninno Nicola , Morello Eugenio 
Published: November 2019

Abstract
Urban solar radiation is a primary factor affecting indoor and outdoor thermal and lighting comfort. However, although 3D solar radiation models are achieving remarkable advances in urban climate planning support and decision making, they are time-consuming and cost-intensive. We aim at compensating for such limitations by providing an agile approach to estimate shadows and solar radiation on building facades, using elevation models (2.5D) and image processing techniques. This is achieved by making the best use of the new visibility toolset for raster processing, provided in ArcGIS, and GRASS GIS solar radiation 2D model. Results give a clear and detailed picture of the radiation condition in the study area, which offers promising opportunities for urban solar planning and assessment in complex urban areas.
Combined geospatial and techno-economic analysis of deep building envelope retrofit
Authors: Streicher Kai Nino , Berger Matthias , Chambers Jonathan , Schneider Stefan , Patel Martin K. 
Published: November 2019

Abstract
In this study, the Swiss residential building stock model (SwissRes model) is used to conduct a geospatial analysis of the techno-economic potential of deep building envelope retrofit packages in Switzerland. Element and building characteristics of 8242 archetype buildings are combined with high-resolution spatio-temporal weather data. We estimate final energy demand before and after retrofit, while correcting for the energy performance gap. Levelized costs of energy savings are calculated in two ways, i.e. based on full costs and investment cost related only to thermal improvement of the envelope. Results show that, technically, a 57% reduction of the final energy demand for space heating could be achieved with the deep envelope retrofit. For full costs, less than 1% of these measures would be cost-effective, whereas for improvement costs nearly the full retrofit potential is cost-effective. We identified primarily rural and mountainous regions as well as historic city centres to show highest cost-effectiveness.
A critical comparison of methods to estimate solar rooftop photovoltaic potential in Switzerland
Authors: Walch Alina , Mohajeri Nahid , Scartezzini Jean-Louis 
Published: November 2019

Abstract
To understand the opportunities and challenges of large shares of solar photovoltaics (PV) in our electricity mix, various large-scale studies of PV potential on building roofs have been conducted in recent years. The use of different datasets, methods and spatio-temporal resolutions leads to widely varying results, making a comparison across different studies intrinsically difficult. In this work, six studies carried out in Switzerland are compared in a quantitative way, in order to understand how different methods impact the potential estimates. We observe a strong trend towards increasing spatial and temporal resolutions, using larger and more accurate datasets for the analysis. While the earliest study relies on rules of thumb, later studies use data-driven estimations, enabled by the use of Machine Learning, scalable algorithms and powerful computational engines. Our analysis shows that the largest differences are caused by the source of the solar radiation input data, the computation of shading effects on rooftops and the estimation of available roof area for PV panel installation. The latter is the most uncertain parameter in the presented studies and offers opportunities for future work.