scholarly journals Calculation Method Modification of Spare Parts Quan-tity to Restore Operability of Weapon Systems

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Pavlo Open’ko ◽  
◽  
V.I. Mirnenko ◽  
V.V. Tуurin ◽  
M.Yu. Myronіuk ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Calculation Method ◽  
Methodological Approach ◽  
Spare Parts ◽  
Weapon Systems ◽  
Methodical Approach ◽  
Mathematical Formalization

The article proposes a methodical approach to calculating the number of spare parts for weapon systems (WS) combat damage elimination and operability restoration based on criteria of minimization of spare parts cost, meeting the requirements of the spare parts, tools, supplies and materials, as well as timeliness of damaged WSs repair. The main points of the methodological approach (mathematical formalization of the task, basic calculation ratios, stages and order of calculation of spare parts stocks) are represented with a simplified scheme of the calculation of spare parts to ensure WS combat damage elimination and operability restoration. Probability of sufficiency and developed mathematical model for its calculation are used as a sufficiency indicator of spare parts to ensure WS combat damage elimination and operability restoration.

scholarly journals Methodical approach to the provision of spare parts for buses operating in tropical African countries

2021 ◽  
Vol 341 ◽  
pp. 00071
Author(s):  
Marcien Ngendakumana ◽  
Andrey Rementsov ◽  
Victor Еgorov
Keyword(s):  
Methodological Approach ◽  
Local Features ◽  
Spare Parts ◽  
Tropical Region ◽  
African Countries ◽  
Maintenance And Repair ◽  
Methodical Approach ◽  
Transportation Company

The article shows the role and features of the operation of vehicles in the tropical region of Africa. The dependence of the reliability of the functioning of transportation company on the climate and local features of operation is noted. A methodological approach to the provision of spare parts for buses is proposed. The issues of management of spare parts reserves for the organization of maintenance and repair of buses are considered.

scholarly journals Modelling time efficiency of cobot-supported kit preparation

2019 ◽  
Vol 106 (5-6) ◽  
pp. 2227-2241 ◽  
Author(s):  
Patrik Fager ◽  
Martina Calzavara ◽  
Fabio Sgarbossa
Keyword(s):  
Experimental Data ◽  
Mathematical Model ◽  
Cycle Time ◽  
Laboratory Experiments ◽  
Spare Parts ◽  
Batch Preparation ◽  
Assembly Quality ◽  
Numerical Example ◽  
Business To Business ◽  
Support Time

AbstractKitting – meaning to supply assembly with components in presorted kits – is widely seen as beneficial for assembly quality and efficiency when there is a multitude of component variants. However, the process by which kits are prepared – the kit preparation – is labour-intensive, and kit errors are problematic at assembly processes. The use of robotics to support kit preparation has received some attention by researchers, but literature is lacking with respect to how collaborative robots – cobots – can support kit preparation activities. The purpose of this paper is to identify the potential of a cobot to support time-efficient batch preparation of kits. To address the purpose, the paper presents a mathematical model for estimation of the cycle time associated with cobot-supported kit preparation. The model is applied in a numerical example with experimental data from laboratory experiments, and cobot-supported kit preparation is compared with manual kit preparation. The findings suggest that cobot-supported kit preparation is beneficial with diverse kits and smaller components quantities per SKU (Stock Keeping Unit) and provides less variability of the outcome, when compared to manual kit preparation. The paper reveals several insights about cobot-supported kit preparation that can be valuable for both academics and practitioners. The model developed can be used by practitioners to assess the potential of cobots to support kit-batch preparation in association with assembly, spare parts, repair and maintenance, or business to business industry.

Study on the Calculation Method of Soil-Nailing for High Soil Slope Based on the Logarithmic Spiral Slippery Fracture

2011 ◽  
Vol 261-263 ◽  
pp. 1709-1713
Author(s):  
Meng Yang ◽  
Xiao Min Liu
Keyword(s):  
Mathematical Model ◽  
Stability Analysis ◽  
Engineering Design ◽  
Calculation Method ◽  
Logarithmic Spiral ◽  
Soil Nailing ◽  
Soil Slope ◽  
Mode Pattern ◽  
Shear Function

This paper introduces a new failure mode pattern of soil slope – the logarithmic spiral slippery fracture. A mathematical model for the logarithmic spiral slippery fracture is established, taking the anti-shear function of the soil-nailing into consideration. The shear of soil-nailing, axial force, and the safety coefficients based on the limiting equilibrium method are derived, leading to an accurate stability analysis of the strengthening of soil slope. A case study shows that the anti-shear function of the soil-nailing can be significant and should not be ignored in engineering design.

The New Measurement and Calculation Method for Dynamic Parameters of DC Motor Based on dSPACE System

2012 ◽  
Vol 562-564 ◽  
pp. 1496-1500
Author(s):  
Qiang Li ◽  
Wei Chen ◽  
Ren He
Keyword(s):  
Mathematical Model ◽  
Duty Cycle ◽  
Calculation Method ◽  
Dc Motor ◽  
Control Algorithms ◽  
Dynamic Parameters ◽  
Hardware In The Loop ◽  
Test Results ◽  
Complex Control ◽  
Measurement And Calculation Method

To investigate the accuracy of modeling DC motor, the platform for measurement and calculation dynamic parameters is built by the Hardware-In-the-Loop(HIL) method based on dSPACE system. The running state of DC motor has to be changed with adjustment of PWM duty-cycle using ControlDesk software. Having got measurement and calculation parameters value of DC motor, we compare the test results with simulation value using the model of DC motor with cascade control in Matlab/Simulink software according to the classical mathematical model. It confirms the established model of DC motor accurately and reliability using new parameters, which provides the basis of more complex control algorithms and also indicates that the feasibility and generalization application value of measurement and calculation method for DC motor.

Ефективність інноваційної діяльності харчової промисловості в системі цілей сталого розвитку країни

Ekonomika APK ◽  
2021 ◽  
Vol 319 (5) ◽  
pp. 46-56
Author(s):  
Olha Kovalenko ◽  
Liudmyla Yashchenko
Keyword(s):  
Sustainable Development ◽  
Capital Investment ◽  
Food Industry ◽  
Methodological Approach ◽  
Calculated Data ◽  
Weighted Average ◽  
Practical Significance ◽  
Educational Institutions ◽  
The Sustainable Development ◽  
Methodical Approach

The purpose of the article is to improve approaches to assessing the effectiveness of innovative activities of the food industry and its individual subsectors to identify prospects for development and problems that can hinder the sustainable development of this area of production and the country as a whole. Research methods. The article uses the methods of theoretical generalizations and comparisons, which made it possible to comprehensively consider and generalize methodological approaches to assessing the effectiveness of innovation in industries. When systematizing the calculated data by the intensity of innovation costs, the methods of statistical classification and grouping were used. To achieve the goal of the study, the methodology for assessing the level of manufacturability of industries has been improved (the OECD methodology is taken as a basis), which made it possible to re-evaluate the effectiveness of innovative activities in sub-sectors of the food industry with an emphasis on the computerization of production. Research results. The article presents a methodical approach to assessing the effectiveness of innovation in the food industry. The study is based on the OECD methodology for assessing the manufacturability of industries, which is to calculate the weighted average cost intensity of R & D. The application of this approach to the food industry has confirmed the too low level of its innovative manufacturability. It was found that due to the lack of relevant statistics on R&D expenditures, it is difficult to assess the effectiveness of innovation in certain sectors of the food industry. It is proposed to solve this problem with the help of capital investment indicators, which are invested in the software of industries and are directly related to the level of computerization of technological processes. The obtained indicators of the intensity of software costs are ranked in descending order and divided into three groups according to the level of computerization, which characterizes the efficiency of innovation, as its level increases profits and profitability in industries. This will contribute to the goals of sustainable development of the country (including goals 2 and 9) and increase the competitiveness of the food industry. Scientific novelty. A methodological approach to assessing the effectiveness of innovative activities of sub-sectors of the food industry in Ukraine is proposed, which will contribute to the formation of a new look at the research methodology of this area of knowledge. Practical significance. Designed for professionals in the field of food industry economics, scientists, teachers, graduate students and students of higher educational institutions. The results of the study can be used by experts to assess the level of manufacturability of industries. Tabl.: 3. Refs.: 30.

scholarly journals Methodical approach to building system of motivation of the project team

2021 ◽  
Vol 97 ◽  
pp. 01036
Author(s):  
Valeriya Glazkova
Keyword(s):  
Project Management ◽  
Methodological Approach ◽  
Development Project ◽  
Project Team ◽  
Team Members ◽  
Motivation System ◽  
Body Of Knowledge ◽  
Methodical Approach ◽  
Team Motivation ◽  
Empirical System

Currently investment and construction activities are based on the implementation of development projects. As any project’s success heavily depends on joint efforts of a project team members, there is an urgent need for a motivation system able to stimulate team members’ result-orientation and satisfy their individual needs. The Project Management Body of Knowledge (PMBOK) methodology is suggested as a basis for building a sound development team motivation system, with its motivational tools correlating to stages of project management. The purpose of this article is to build methodical approach to system of motivation of the development project team. The methodological approach is formed taking into account the correspondence of the goal and the type of motivation depending on the stage of project management, as well as on the basis of the principles of forming the motivation system of the project team. The result is a constructed conceptual model for the development of a motivation system for the development project team based on the principles of PMBOK. Methods of comparative, empirical, system and economic analysis were used to substantiate the propositions put forward in the article.

scholarly journals Assessing the Investment Attractiveness of Food Industry Enterprises

2021 ◽  
Vol 6 (521) ◽  
pp. 259-264
Author(s):  
L. I. Bezghinova ◽  
◽  
L. D. Zabrodska ◽  
H. I. Zabrodska ◽  
O. M. Nesterenko ◽  
...  
Keyword(s):  
Food Industry ◽  
Methodological Approach ◽  
The State ◽  
Normative Values ◽  
Return On Equity ◽  
Coverage Ratio ◽  
Methodical Approach ◽  
Industry Affiliation ◽  
Integral Assessment ◽  
Methodological Aspects

The article is aimed at substantiating the methodological approach to assessing the investment attractiveness of the food industry enterprise, taking into account its industry characteristics. The article describes the specifics of the activities of food industry enterprises, which can characterize the state of their investment attractiveness. The methodological aspects of assessment of investment attractiveness of enterprise are considered. The assessment of the investment attractiveness of a food industry enterprise is proposed to be carried out from the short- and long-term perspective. The methodology for assessing the investment attractiveness of the food industry enterprise is substantiated according to the following stages: formation of an information base of assessment; assessment of investment attractiveness elements and determination of their normative values by groups of financial coefficients; integral assessment of elements of the state of investment attractiveness; ranking of enterprises based on the results of the investment attractiveness assessment. Four groups of financial coefficients are distinguished in accordance with their economic content: liquidity (absolute liquidity ratio, coverage ratio); negotiability (negotiability ratio of total capital, negotiability ratio of current assets); financial sustainability (coverage structure coefficient, ratio of own and borrowed funds); profitability (return on assets, return on equity). The methodology allows, depending on the priorities and policies of the enterprise, its industry affiliation, investment climate, economic development conditions, to choose other criteria and indicators to assess the level of investment attractiveness. A methodical approach to the construction of an integral indicator of the assessment of investment attractiveness of enterprise and a factor map of its interpretation with the allocation of low, medium and high levels are proposed.

scholarly journals METHODICAL APPROACH TO COMPLEX ASSESSMENT OF QUALITY OF CUSTOMS SERVICES

2019 ◽  
Vol 1 (7) ◽  
pp. 100-107
Author(s):  
Yu. Gupanova ◽  
Yu. Chechulin
Keyword(s):  
Quality Assessment ◽  
Integrated Assessment ◽  
Critical Analysis ◽  
Methodological Approach ◽  
Comprehensive Assessment ◽  
Methodical Approach ◽  
Scientific Papers ◽  
Integral Quality

Based on a critical analysis of existing scientific papers in the field of assessing the quality of customs services and the activities of customs authorities as a whole, the need to develop a methodological approach to a comprehensive assessment of the quality of customs services has been revealed and substantiated. At the same time, an author’s approach to an integrated assessment of the quality of customs services has been proposed, which includes the principles of assessment, assessment directions, the method for calculating the overall integral quality assessment and specific indicators, which can be used to evaluate each of the directions.

scholarly journals Investment efficiency of business in Ukraine: realities and assessment methodology

2021 ◽  
Vol 2 (47) ◽  
pp. 48-63
Author(s):  
L.V. Sorokina ◽  
A.F. Hoiko
Keyword(s):  
Economic Efficiency ◽  
Capital Investment ◽  
Construction Projects ◽  
Methodological Approach ◽  
International Investment ◽  
Investment Efficiency ◽  
Investment Climate ◽  
Investment Projects ◽  
Methodical Approach ◽  
National Investment

 The article systematized factors of investment attractiveness and investment climate in Ukraine. The expediency of supplementinganexistinglist of components of investment climate is substantiated by two additional factors. Themechanismo factionoftheproposedfactorsthatreflectthenegative effectin the developmen to freformsand innovations, aswellas the economic efficiency of construction projects on the financial result, expected from investigations, isrevealed. The trends in the developmen to finvestment activityinUkrainein 2015 - 2020, the existence of reserves for increasing the economic efficiency of investments and the need for their calculation witht hehelpof a special methodological approac hare analyzed. The methodical approach to the evaluation of investment efficiency of constructionis developed, which is based on the magnitude of the multiplier of capital investment in construction inthelong-termperiodandrefinedtheboundariesoftheretrospectivehorizon, which are necessary to determine such a multiplier. The rapid importance of aninvestment multiplier of construction isestablis hedand a methodological approach to qualitative interpretation of this indicator issubstantiated. The basis of a methodological approach is the results of a cluster analysis of aninvestment multiplier in the contex to fvarioustypesofconstructionandregions, the methodof K-medium, aswellaspostulatesofthetheoryoffuzzysets. Within the framework of the developed methodological approach, the "investment attractiveness of construction" characteristicsis presentedin the form of a fuzz yterm-shear, which combines three terms: "Lowefficiency", "averageefficiency", "highlevelofefficiency". Inaccordance with descriptiv estatistics of thereceived clusters, the parameters and type of functions of affiliation, the boundaries of clusters that directly affecttheuse of correctivea mendments to the value of the economic effectof capitalinvestment to the level of the contractor-executor of construction work are substantiated. The sizeofther is kfactorisestablishedtakingintoaccountthetypeofconstructionandmedium-layervalues ​​ofmultipliersofcapitalinvestmentinconstruction. Theuse of the proposed Metdic approach to the analysis of investment efficiency inconstruction makesitpossible to increase the accuracy of calculations on th epre-investmentst age of construction, aswellastoimprovemonitoring of capital investment development, carried out in the process of implementing national investment programs and international investment projects.

scholarly journals Diagnostics of supercapacitors

2018 ◽  
Vol 182 ◽  
pp. 01009 ◽  
Author(s):  
Valeriy Martynyuk ◽  
Oleksander Eromenko ◽  
Juliy Boiko ◽  
Tomasz Kałaczyński
Keyword(s):  
Mathematical Model ◽  
Mathematical Models ◽  
Methodological Approach ◽  
Frequency Dispersion ◽  
Technical Condition ◽  
Transient Processes ◽  
Nonlinear Frequency ◽  
Diagnostic Reliability ◽  
General Reliability ◽  
The Mathematical Model

The paper represents the mathematical model for diagnostics of supercapacitors. The research objectives are the problem of determining a supercapacitor technical condition during its operation. The general reliability of diagnostics is described as the methodological and instrumental reliabilities of diagnostics. The instrumental diagnostic reliability of supercapacitor includes the probabilities of errors of the first and second kind, α and β respectively. The methodological approach to increasing the reliability of supercapacitor diagnostic has been proposed, in terms of multi-parameter supercapacitor diagnostic by applying nonlinear, frequency dependent mathematical models of supercapacitors that take into account nonlinearity, frequency dispersion of parameters and the effect of transient processes in supercapacitors. The more frequencies, operating voltages and currents are applied in the supercapacitor diagnostics, the more methodological reliability of diagnostics will increase in relation to the methodological reliability of supercapacitor diagnostics when only one frequency, voltage and current are applied.

Sign in / Sign up

Export Citation Format

Share Document