scholarly journals INVENTORY MANAGEMENT IN THE ORGANIZATION OF LOCOMOTIVE PARK SERVICE

2021 ◽  
pp. 140-149
Author(s):  
Alexander Semenovich Krasheninin ◽  
Dmytro Oleksandrovych Matsegora ◽  
Alexander Polʹovyy ◽  
M. V. Pakhomov
Keyword(s):  
Inventory Management ◽  
Warning System ◽  
Technical Condition ◽  
Spare Parts ◽  
Rolling Stock ◽  
Virtual Storage ◽  
Park Service ◽  
Procurement Procedure ◽  
Definition Of ◽  
Traditional Approaches

Planned warning system for locomotive repair has almost exhausted its potential.This was facilitated by the rapid deterioration of the technical condition of the locomotive fleet andinfrastructure for both repair and operation. Rolling stock renewal is almost non-existent, and thereis interest in providing railway services due to rising tariffs and low levels of comfort.On the contrary, some foreign railways consider the planned warning system exhausted,especially in compliance with all requirements for maintenance and repairs, timely modernizationmeasures.But at the same time, the policy of monitoring the technical condition of manufacturers to formthe infrastructure for the organization of repair and modernization of the series of locomotives isgradually developing. The first scientific researches in this direction were devoted to substantiationof strategy of interaction of traditional approaches and those which bring considerable differencesfrom traditional. This is the adoption of a strategy for the distribution of operational and repairfunctions of locomotive enterprises, and when, together with manufacturers, repair plants and depots,the need to transfer repairs to service centers is determined.At the same time, large centers are being formed that provide service services for the regionsof operation, namely, organize the monitoring and audit of the enterprise and ensure the organizationof rolling stock repairs.Without a clear organization of the supply system, the organization of locomotive service, whichrequires the selection of the optimal procurement procedure and stocks.The introduction of a new system of maintenance and restoration of the locomotive fleet on theprinciples of service requires a clear organization of the supply of spare parts for repairinfrastructure. The system considers the solution of the optimization problem of the balance of profits andlosses in the creation of stocks for locomotive service.Assuming that the process demand was mostly random, it is proposed to introduce a targetfunction that takes into account the definition of the law of distribution of demand for spare parts,based on the minimum of the given measurements for their acquisition and storage. With this in mind,it is proposed to create an ideology of «virtual storage» to optimize stocks and their costs.

scholarly journals MODEL OF AN ESTIMATION OF A RESOURCE OF TRACTION TRANSFER OF A MOTOR CARLOAD ROLLING STOCK

2015 ◽  
Vol 2 (158) ◽  
Author(s):  
Aleksandr Babanin ◽  
Sergiy Yarovoy ◽  
Vadim Bulba
Keyword(s):  
Life Cycle ◽  
Service Life ◽  
Motor Block ◽  
Technical Condition ◽  
Normal Operation ◽  
Rolling Stock ◽  
Definition Of ◽  
Analytical Expressions

In clause questions of definition of a resource of the wheel motor block traction transfer of a motorcarload rolling stock are considered. Problems of forecasting of a technical condition of responsible units oftraction transfer are certain. The model of deterioration in which the periods extra earnings are allocated,normal operation, intensive deterioration and prolongation of service life of the wheel motor block of amotor carload rolling stock is formalized for weigh his life cycle. For each allocated period meetingdependences of speed and intensity of deterioration are offered. According to dependences calculations arelead and analytical expressions of wear of points of cog-wheels of power reducing of traction transfer whichallow to predict his resource in operation are received.

Missing Data - Better "Not to Have Them", but What If You Do? (Part 1)

Marketing ZFP ◽  
2019 ◽  
Vol 41 (4) ◽  
pp. 21-32
Author(s):  
Dirk Temme ◽  
Sarah Jensen
Keyword(s):  
Missing Data ◽  
Statistical Power ◽  
Missing Values ◽  
Graphical Representation ◽  
Marketing Research ◽  
Likelihood Estimation ◽  
Parameter Estimates ◽  
Full Information Maximum Likelihood ◽  
Definition Of ◽  
Traditional Approaches

Missing values are ubiquitous in empirical marketing research. If missing data are not dealt with properly, this can lead to a loss of statistical power and distorted parameter estimates. While traditional approaches for handling missing data (e.g., listwise deletion) are still widely used, researchers can nowadays choose among various advanced techniques such as multiple imputation analysis or full-information maximum likelihood estimation. Due to the available software, using these modern missing data methods does not pose a major obstacle. Still, their application requires a sound understanding of the prerequisites and limitations of these methods as well as a deeper understanding of the processes that have led to missing values in an empirical study. This article is Part 1 and first introduces Rubin’s classical definition of missing data mechanisms and an alternative, variable-based taxonomy, which provides a graphical representation. Secondly, a selection of visualization tools available in different R packages for the description and exploration of missing data structures is presented.

Determining the discount rate when evaluating trade organizations: Some features

2020 ◽  
Vol 13 (1) ◽  
pp. 71-84
Author(s):  
E.A. Grigor'eva ◽  
A.S. Buzhikeeva
Keyword(s):  
Discount Rate ◽  
Economic Activity ◽  
Systems Approach ◽  
Market Value ◽  
Additional Risk ◽  
Evaluation Procedures ◽  
Analytical Research ◽  
Definition Of ◽  
Traditional Approaches

Subject. This article deals with the issues of determining the market value of the trading business, taking into account a number of characteristics. Objectives. The article aims to develop certain provisions of the methodology and practice of evaluating the business of trading organizations, namely, taking into account the additional risk of inventory feasibility when calculating the discount rate. Methods. For the study, we used a systems approach, and the cognition, and economic and analytical research methods. Results. The article presents a three-tiered classification of stocks and a definition of risk based on the criteria for dividing stocks by purpose, degree of implementation, and shelf life in accordance with the scale. Based on the classification, the article offers certain recommendations for determining the discount rate when evaluating trading organizations, aimed at taking into account additional risk. Conclusions. Various evaluation procedures within the framework of traditional approaches and methods in relation to trading organizations do not take into account risk specific to this type of economic activity. The proposed methodology for calculating the discount rate for trade organizations takes into account the features of their functioning.

The specifics of mergers and acquisitions of innovative and technological companies

2020 ◽  
Vol 26 (5) ◽  
pp. 1186-1204
Author(s):  
A.V. Fedorov ◽  
Zh.S. Peredera
Keyword(s):  
Digital Technology ◽  
Comprehensive Analysis ◽  
Methodological Framework ◽  
Comparison Study ◽  
Technology Sector ◽  
Theoretical Perspectives ◽  
Innovation And Technology ◽  
Set Up ◽  
Definition Of ◽  
Traditional Approaches

Subject. The article reviews distinctions of M&A deals in innovation and technology. Objectives. We determine the specifics of innovative and technological companies and its impact on the synergy, process, finance, valuation of M&A deals. Methods. The article employs methods of generalization, comprehensive analysis, systematization, specification, comparison, study into trends and the structure. Graphics and tables are used to display the findings. Results. We conducted the content analysis of the term Mergers & Acquisitions, thus finding the divergence of foreign and the Russian approaches. We provide our own definition of the concept and analyzed the dynamics of the overall M&A market and the innovation and technological sector. The article describes operational distinctions of innovative and technological companies and compares them with conventional sectors. The article determined the specifics of synergy, process, finance, valuation of M&A deals in innovation and technology. Conclusions and Relevance. The innovation and technology sector saw M&A deals become more frequent for the recent five years. What distinguishes them is the number of startups and infant businesses, large M&A deals in order to develop their ecosystems, involve digital technology companies. Traditional approaches should be adapted for structuring M&A deals, their arrangement, financing and valuation of target companies. The findings can lay the groundwork for further studies into the specifics of the innovation and technology sector, M&A deals, and set up the methodological framework for the valuation of innovative and technological companies. The findings can also immediately support parties of M&A deals from theoretical perspectives.

scholarly journals Multi-Criteria Spare Parts Classification Using the Deep Convolutional Neural Network Method

2021 ◽  
Vol 11 (15) ◽  
pp. 7088
Author(s):  
Ke Yang ◽  
Yongjian Wang ◽  
Shidong Fan ◽  
Ali Mosleh
Keyword(s):  
Neural Network ◽  
Convolutional Neural Network ◽  
Inventory Management ◽  
Hierarchical Classification ◽  
Critical Issue ◽  
Spare Parts ◽  
Deep Convolutional Neural Network ◽  
Learning Ability ◽  
Second Phase ◽  
Good Decision

Spare parts management is a critical issue in the industrial field, alongside planning maintenance and logistics activities. For accurate classification in particular, the decision-makers can determine the optimal inventory management strategy. However, problems such as criteria selection, rules explanatory, and learning ability arise when managing thousands of spare parts for modern industry. This paper presents a deep convolutional neural network based on graph (G-DCNN) which will realize multi-criteria classification through image identification based on an explainable hierarchical structure. In the first phase, a hierarchical classification structure is established according to the causal relationship of multiple criteria; in the second phase, nodes are colored according to their criteria level status so that the traditional numerical information can be visible through graph style; in the third phase, the colored structures are transferred into images and processed by structure-modified convolutional neural network, to complete the classification. Finally, the proposed method is applied in a real-world case study to validate its effectiveness, feasibility, and generality. This classification study supplies a good decision support to improve the monitor-focus on critical component and control inventory which will benefit the collaborative maintenance.

scholarly journals PECULIARITIES OF MATERIAL RESOURCE MANAGEMENT OF ENTERPRISES OF BUILDING MATERIALS

2021 ◽  
Author(s):  
Iryna Hobyr ◽  
Lidiia Hobyr
Keyword(s):  
Inventory Management ◽  
Building Materials ◽  
Construction Materials ◽  
Design And Technology ◽  
Resource Saving ◽  
New Production ◽  
Utilization Factor ◽  
Resources Management ◽  
Material Resources ◽  
Definition Of

In a market economy, it becomes important to improve the organization of enterprise management and, above all, the production process, efficient use of financial, material resources and inventories. Effective management of material resources increases profits and provides the necessary investment. To maintain high profitability and liquidity, the management of current activities of enterprises, in particular inventory management plays a significant role. The categorical apparatus of material resources management at the enterprise is considered, the definition of “material resources” is generalized, the definition of "material resources management" is offered, and also the system of material resources management at the enterprise is considered. In the management of material resources at the enterprise there are 2 approaches – logistics and reengineering. The main tasks of the mechanism of management of material resources of the enterprise of building materials are defined. These are: increasing the efficiency of material resources and choosing cheap sources of funding; introduction of new production, resource-saving technologies; minimization of costs for procurement, production and marketing activities; increasing the interest of employees of all services in the effective performance of their duties; product quality management. The analysis of efficiency of use of material resources at the enterprises of building materials which has shown, that manufacture of production is rather material-intensive is carried out. This is evidenced by the share of material costs in the cost of work, and the value of the utilization factor of materials indicates the economical use of material resources in production. Reserves for improving the efficiency of material resources at construction materials enterprises have been identified. The ways of the most rational use of material resources of construction materials enterprises are offered, in particular it is improvement of a design and technology of manufacturing of products, introduction of more progressive norms of expenses of resources, use of substitute materials, and reduction of losses at stages of transportation, storage and industrial use.

scholarly journals Diagnosis of technical parameters of amplifiers used in sound warning systems

2017 ◽  
Vol 66 (3) ◽  
pp. 99-110
Author(s):  
Jacek Paś
Keyword(s):  
Power Amplifiers ◽  
Warning System ◽  
Fire Detection ◽  
Technical Condition ◽  
Essential Elements ◽  
Technical Parameters ◽  
Alarm Systems ◽  
Life Threatening ◽  
Evacuation Routes ◽  
Working Parameters

The article presents a method of diagnosing the technical conditions of a power amplifier which is used in a sound warning system (SWS). Fire Alarm Systems (FAS) and SWSs are electronic safety systems designed to protect life and health. The FAS is used for effective fire detection, while life-threatening SWSs provide efficient communication of emergency information and evacuation routes via voice. The article presents the problem of diagnosing the technical condition of power amplifiers, which are the essential elements of SWSs. Power amplifiers provide a certain level of undistorted audio (alarm messages) to the speaker set that is arranged in a building supervised by FAS. Keywords: amplifier, audible warning system, working parameters

Sign in / Sign up

Export Citation Format

Share Document