scholarly journals ADEQUACY OF THE MATHEMATICAL MODEL FOR DETERMINING RATIONAL CAPITAL INVESTMENTS

2021 ◽  
pp. 35
Author(s):  
O. KHARCHENKO
Keyword(s):  
Sustainable Development ◽  
Rail Transport ◽  
Capital Investments ◽  
Railway Transport ◽  
Development Methodology ◽  
Verification Of Models ◽  
The Mathematical Model ◽  
Fisher’S Criterion ◽  
Use Of Models

Purpose. Modeling today is one of the popular research methods related to increasing the efficiency of the functioning of rail transport units, because the model is a substitute for the original object that helps to study its properties. Compliance with the results obtained by model, the behavior of a real object is an important issue for modeling, so the adequacy verification is an integral part of this process. Therefore, the purpose of this article is to present a method for verifying the adequacy of the model of determination of rational investments in terms of sustainable development. Methodology. For models of dependence of the function of elasticity of investments in the directions of sustainable development on the characteristics of demand for services, checking for the adequacy on the basis of Fisher's criterion was carried out. For what zero hypothesis was formed on the equality of dispersion of inadequacy and dispersion of the experiment. Findings. The verification of models on adequacy has shown that the dependence of the functions of elasticity of investments in the areas of sustainable development from the parameters of demand for services adequately describes experimental results. Practical value. The performance of the adequacy of models confirmed the expediency of practical use of models in the management of railway transport depending units of the functions of elasticity of investments in the directions of sustainable development on the characteristics of demand for services of departments.

scholarly journals Proposal for the Evaluation of the Stability Level of Periodic Timetable in Terms of Operation and Infrastructure

2021 ◽  
Vol 17 (1) ◽  
pp. 25-33
Author(s):  
Lukáš Čechovič ◽  
Adrián Šperka ◽  
Jozef Gašparík
Keyword(s):  
Rail Transport ◽  
Point Of View ◽  
Passenger Transport ◽  
Railway Transport ◽  
Scientific Methods ◽  
Practical Point ◽  
Railway Networks ◽  
Transport Path ◽  
The Stability

Abstract The introduction of tact timetable in rail passenger transport is currently a new evolving trend that increases the efficiency of rail transport. This article seeks to contribute in this area of the issue and thus to raise and improve this system of organizing transport in railway transport. The aim is to propose a methodology that assesses the level of stability of tact timetable based on operational and infrastructural factors. The methodology identifies operational-infrastructural factors that affect the stability and reliability of tact timetable. Using scientific methods, it presents the method of their quantification and determination of the weights of these factors, which evaluate the line sections and transport points of the examined transport path. From a practical point of view, the methodology is generally tact applicable to other European railway networks. In the final part of the work, this methodological procedure is applied in the form of model examples for various transport path.

scholarly journals Targeted Management of Labor Productivity for Sustainable Development of Enterprises

2021 ◽  
Vol 295 ◽  
pp. 01026
Author(s):  
Marina Simonova ◽  
Vladlena Grikhno ◽  
Natalya Nikolashina
Keyword(s):  
Sustainable Development ◽  
Economic System ◽  
Labor Productivity ◽  
Value Added ◽  
Added Value ◽  
Development Methodology ◽  
Human Labor ◽  
Scientific Substantiation

Study purpose: scientific substantiation of an innovative approach to economic concepts related to productivity and determination of the location of labor productivity in the product value added chain to ensure sustainable development. Methodology: the development of a model for creating added value with the allocation of a stage in it at which human labor is used, allowed the author to determine the possibility of setting goals for the short, medium and long term for various stages of production. The article substantiates the need to divide the principles of calculating labor productivity by stages of added value creation, highlighting the stage of creating innovations. As a result of the decomposition of the goals of the production system, the author comes to the conclusion that there is a need for more accurate positioning of labor productivity in the value-added chain and the transition from setting the goal of increasing labor productivity to solving a problem that ensures an increase in the efficiency and stability of the entire economic system. As a result of the research, a model for coordinating the growth of labor productivity and investment directions to achieve high rates of productivity and stability of the economic system has been drawn up.

DETERMINATION OF PERFORMANCE INDICATORS OF THE TRUCK KrAZ-6510TE

2020 ◽  
pp. 19-26
Author(s):  
Olexandr Pavlenko ◽  
Serhii Dun ◽  
Maksym Skliar
Keyword(s):  
Mathematical Model ◽  
Surface Friction ◽  
Building Structures ◽  
Maximum Torque ◽  
Military Equipment ◽  
Military Vehicles ◽  
Force Magnitude ◽  
Vehicle Mobility ◽  
The Mathematical Model

In any economy there is a need for the bulky goods transportation which cannot be divided into smaller parts. Such cargoes include building structures, elements of industrial equipment, tracked or wheeled construction and agricultural machinery, heavy armored military vehicles. In any case, tractor-semitrailer should provide fast delivery of goods with minimal fuel consumption. In order to guarantee the goods delivery, tractor-semitrailers must be able to overcome the existing roads broken grade and be capable to tow a semi-trailer in off-road conditions. These properties are especially important for military equipment transportation. The important factor that determines a tractor-semitrailer mobility is its gradeability. The purpose of this work is to improve a tractor-semitrailer mobility with tractor units manufactured at PJSC “AutoKrAZ” by increasing the tractor-semitrailer gradeability. The customer requirements for a new tractor are determined by the maximizing the grade to 18°. The analysis of the characteristics of modern tractor-semitrailers for heavy haulage has shown that the highest rate of this grade is 16.7°. The factors determining the limiting gradeability value were analyzed, based on the tractor-semitrailer with a KrAZ-6510TE tractor and a semi-trailer with a full weight of 80 t. It has been developed a mathematical model to investigate the tractor and semi-trailer axles vertical reactions distribution on the tractor-semitrailer friction performances. The mathematical model has allowed to calculate the gradeability value that the tractor-semitrailer can overcome in case of wheels and road surface friction value and the tractive force magnitude from the engine. The mathematical model adequacy was confirmed by comparing the calculations results with the data of factory tests. The analysis showed that on a dry road the KrAZ-6510TE tractor with a 80 t gross weight semitrailer is capable to climb a gradient of 14,35 ° with its coupling mass full use condition. The engine's maximum torque allows the tractor-semitrailer to overcome a gradient of 10.45° It has been determined the ways to improve the design of the KrAZ-6510TE tractor to increase its gradeability. Keywords: tractor, tractor-semitrailer vehicle mobility, tractor-semitrailer vehicle gradeability.

Assessment of sensitivity of the efficiency of regional tax spending towards investment attractiveness of the types of economic activity carried out by the residents of advanced development territory

2020 ◽  
pp. 98-110
Author(s):  
Evgeniya Mikhailovna Popova ◽  
Guzel Mukhtarovna Guseinova ◽  
Sergei Borisovich Milov
Keyword(s):  
Economic Activity ◽  
Socioeconomic Development ◽  
Federal District ◽  
Tax Incentives ◽  
Capital Investments ◽  
The Subject ◽  
Investment Process ◽  
The Impact ◽  
Advanced Development

The deficit of subnational budgets and deceleration capital investments in multiple Russian regions increase the relevance of research aimed at improvement of tax incentivizing practice of the regional investment process. The studies focused on determination of the impact of socioeconomic and institutional factors upon the efficiency of investment tax expenses obtained wide circulation within the foreign scientific literature. The subject of this article is the assessment of sensitivity of the efficiency of regional tax expanses towards investment attractiveness of the types of economic activity carried out by the residents of territories of advanced socioeconomic development, created in the subjects of Far Easter Federal District. The scientific novelty and practical values of this research consists in substantiation of the reasonableness of assessment of investment attractiveness of the types of economic activity that are stimulated by tax incentives. Methodology for assessing investment attractiveness is proposed and tested. The conclusion is made that in case of low investment attractiveness of the type of economic activity, which was planned to support by tax incentives, it is required to conduct and additional analysis to avoid unjustified tax expanses.

REGULATION URGENCY CONCERNING ADMINISTRATIVE SANCTION GUIDELINES IN SPACE ADMINISTRATION

2019 ◽  
Vol 6 (3) ◽  
Author(s):  
Rakhmat Bowo Suharto
Keyword(s):  
Sustainable Development ◽  
Welfare State ◽  
Spatial Planning ◽  
Legal Protection ◽  
Spatial Development ◽  
Administrative Sanction ◽  
The Government ◽  
The Welfare State

The spatial development can be supported by sustainable development, efforts are needed to divert space through the imposition of sanctions on administration in the spatial field. In the context of a legal state, sanctions must be taken while ensuring their legality in order to provide legal protection for citizens. The problem is, the construction of administrative regulations in Law No. 26 of 2007 and PP No. 15 of 2010 contains several weaknesses so that it is not enough to provide clear arrangements for administrative officials who impose sanctions. For this reason, an administration is required which requires administrative officials to request administrative approval in the spatial planning sector. The success of the regulation requires that it is the foundation of the welfare state principle which demands the government to activate people's welfare. 15 of 2010, the main things that need to be regulated therein should include (1) the mechanism of imposing sanctions: (2) determination of the type and burden of sanctions; and (3) legal protection and supervision by the region.

scholarly journals Anticipatory Non-Green-Phenomena Determination for Designing Eco-Design Products

2021 ◽  
Vol 13 (2) ◽  
pp. 621
Author(s):  
Hsin Rau ◽  
Mary Deanne M. Lagapa ◽  
Po-Hsun Chen
Keyword(s):  
Sustainable Development ◽  
Environmental Impact ◽  
Product Design ◽  
Determination Method ◽  
Washing Machine ◽  
Product Failure ◽  
Design Concepts ◽  
The World ◽  
World Business Council

The number of consumers with green awareness have grown these days and as a result they have turned to purchase eco-friendly products. For this reason, this study aims to propose a method for eco-design based on the anticipatory failure determination method to develop eco-design products. By using eco-design concepts adopted from the World Business Council for Sustainable Development, the process will limit the failures and issues related to environmental impact in product design. The proposed method for eco-design product in this study follows the following procedure. First, we analyze product failure. Second, we propose the determination of the non-green phenomenon of the failure. Thirdly, we integrate the intensified non-green phenomenon to generate non-green hypotheses and fourthly, we eliminate each non-green phenomenon hypothesis by introducing the contradiction matrix of TRIZ for obtaining solutions. Finally, we assess alternative eco-design solutions by evaluation. To verify the practicality of the new procedure, a washing machine is used as an example for illustration.

scholarly journals Determination of the Vertical Load on the Carrying Structure of a Flat Wagon with the 18–100 and Y25 Bogies

2021 ◽  
Vol 11 (9) ◽  
pp. 4130
Author(s):  
Oleksij Fomin ◽  
Alyona Lovska ◽  
Václav Píštěk ◽  
Pavel Kučera
Keyword(s):  
Mathematical Model ◽  
Fatigue Strength ◽  
Service Life ◽  
Dynamic Characteristics ◽  
Dynamic Load ◽  
Field Tests ◽  
Vertical Load ◽  
Mathcad Software ◽  
The Mathematical Model

The study deals with determination of the vertical load on the carrying structure of a flat wagon on the 18–100 and Y25 bogies using mathematic modelling. The study was made for an empty wagon passing over a joint irregularity. The authors calculated the carrying structure of a flat wagon with the designed parameters and the actual features recorded during field tests. The mathematical model was solved in MathCad software. The study found that application of the Y25 bogie for a flat wagon with the designed parameters can decrease the dynamic load by 41.1% in comparison to that with the 18–100 bogie. Therefore, application of the Y25 bogie under a flat wagon with the actual parameters allows decreasing the dynamic loading by 41.4% in comparison to that with the 18–100 bogie. The study also looks at the service life of the supporting structure of a flat wagon with the Y25 bogie, which can be more than twice as long as the 18–100 bogie. The research can be of interest for specialists concerned with improvements in the dynamic characteristics and the fatigue strength of freight cars, safe rail operation, freight security, and the results of the research can be used for development of innovative wagon structures.

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