scholarly journals The problem statement of an information system creation for evaluating and forecasting the states of the power boiler.

2020 ◽  
Vol 11 (8-2020) ◽  
pp. 110-115
Author(s):  
E.V. Balbukova ◽  
◽  
Keyword(s):  
Information System ◽  
Residual Life ◽  
Thermal Power ◽  
Technical Condition ◽  
Urgent Task ◽  
Maintenance Work ◽  
Using Data ◽  
Equipment Wear ◽  
The Cost ◽  
Power Boiler

When operating a thermal power plant (TPP), it is of great importance to ensure the reliability and safety of the enterprise while minimizing the cost of maintenance and repair of equipment. The currently used strategy for preventive maintenance is to carry out periodic work at predetermined times, regardless of the technical condition of the equipment. At the same time, the operating timefeatures, heterogeneous loads and, consequently, various equipment wear are not taken into account. Almost always there is an episodic deviation of the operating parameters of a particular equipment from the nominal values, which leads to an intensification of the wear processes and thereby a decrease in the residual life of this equipment. Therefore, the urgent task is to create tools for information and analytical support for planning repair and maintenance work based on the assessment and prediction of the condition of equipment using data from operational monitoring and computer modeling. In this paper, we pose the problem of creating an information system for assessing and predicting the states of an energy boiler as one of the key nodes of a TPP.

Development of an algorithm of implementation of programs of repair of steam boilers and turbines of TPPs based on technical condition of power equipment

2021 ◽  
Vol 14 (1) ◽  
pp. 40-44
Author(s):  
N. V. Baidakova ◽  
A. V. Afonin ◽  
A. V. Blagochinnov
Keyword(s):  
Power Plants ◽  
Thermal Power ◽  
Technical Condition ◽  
Equipment Maintenance ◽  
Power Equipment ◽  
Equipment Failure ◽  
Software Market ◽  
Maintenance System ◽  
Steam Boilers ◽  
The Cost

Deterioration and aging of the technical fleet of thermal power facilities lead to an unpredictable shutdowns of power equipment. Therefore, it is necessary to create a special approach in maintenance and repair programs, taking into account the possibility of predicting the moment of onset of the defect, its development, as well as the time of possible equipment failure. The equipment maintenance system used at the enterprises is based on the collection of retrospective data on defects and failures on the main and auxiliary equipment of the TPP and summarizing statistics on identical or similar equipment samples. Analysis of domestic and foreign methods of maintenance and organization of repair, as well as possibility of their application in modern power engineering is given. In order to create an efficient production asset management system, which addresses the problem of finding a balance between the potential risk of losses associated with both the operation of equipment and the cost of correcting defects, new class systems are now used in the software market, which carry out equipment maintenance based on the forecast. In order to optimize the equipment maintenance system and ensure uninterrupted and reliable operation of the equipment at minimum operating costs, as well as to reduce equipment downtime, unscheduled and emergency operations, it is advisable to use a modern approach to manage both reliability and risk, as well as the cost of asset ownership. This will enable to control the economic efficiency of the use of production assets. The necessity of creation of an algorithm of implementation of repair programs of power equipment base on technical condition for its use in digital power systems is shown. An algorithm is proposed for implementing the repair program of power units of electric power plants, including steam boilers and turbines of thermal power plants, differing by taking into account the technical condition of power equipment, which allows recognizing the defect that has appeared, determining the cause of its occurrence, its evolution and the duration of possible equipment failure. In the developed repair maintenance algorithm, it is proposed to make a transition from statistical empirical assessments of the technical condition of the equipment to objective estimates obtained on the basis of automated technical diagnostics systems and predictive analysis of situations.

scholarly journals Determination of failure rate function on the basis оf the markovian process

2021 ◽  
pp. 79-87
Author(s):  
Iryna Bashkevych ◽  
◽  
Yurii Yevseichyk ◽  
Kostiantyn Medvediev ◽  
Leonid Yanchuk ◽  
...  
Keyword(s):  
Failure Rate ◽  
Residual Life ◽  
Analytical Form ◽  
Rate Function ◽  
Markovian Process ◽  
Failure Rate Function ◽  
Repair Work ◽  
Rate Functions ◽  
Maintenance Work ◽  
The Cost

The life cycle of a construction (or its element) is considered as markovian process with discrete states and continuous time. Five operational states have been accepted, in which the construction may be. The corresponding system of differential equations is obtained for the case of a homogeneous markovian process with a constant conversion rate (Kolmogorov system). The method of uncertain coefficients is applied to solve the system of equations in analytical form. The obtained solutions make it possible to determine the probability of finding the construction in a particular state as well as the most likely transition time from one operational state to another. Security function defined as the probability of not finding the construction in its last (inoperable) state and the failure rate function. The graphs of the probability of finding a construction in each of the five states, reliability and failure rate functions are presented and investigated. The obtained analytical dependences make it possible to determine the longevity and residual life of the work both individual elements and structures as a whole and optimize scheduling for ongoing maintenance work, significantly improve the performance of the structure, reduce the cost of repair work and extend the life of the structure.

Case Mix Management: A Cautionary Note

1993 ◽  
Vol 6 (3) ◽  
pp. 47-50
Author(s):  
Michael J. Long
Keyword(s):  
Information System ◽  
Management Information System ◽  
Case Mix ◽  
Management Information ◽  
Cautionary Note ◽  
Hospital Administrators ◽  
Diagnostic Related Groups ◽  
Using Data ◽  
The Cost ◽  
The Relationship

Using data from a study that involved 500 U.S. acute care hospitals, the author examines the relationship between the profitability of Diagnostic Related Groups (DRGs) and their DRG weight, and the similarity/difference of the most/least profitable DRGs across hospital types. Hospital administrators are cautioned that to engage in case mix management, they must use a management information system that provides the data necessary for determining the cost of treating each patient type within their own institution, not information derived from other facilities or other systems.

scholarly journals PERANCANGAN SISTEM INFORMASI AKUNTANSI PEMBELIAN STUDI KASUS : UD XYZ SALATIGA

2019 ◽  
Vol 17 (1) ◽  
pp. 49
Author(s):  
Purwanto Purwanto
Keyword(s):  
Information System ◽  
Research Methods ◽  
Accounting Information ◽  
System Implementation ◽  
Accounting Information System ◽  
Form Design ◽  
System Requirements ◽  
Flow Diagrams ◽  
Using Data ◽  
The Cost

The objective of the company’s business activities is to give gain or profit. One of the ways to meet the objective is by reducing the cost.  The company which does not regulate its purchases will suffer losses. The purpose of the study was to design a purchasing accounting information system to assist in increasing company profits. The research methods were by defining and analyzing system requirements by using Data Flow Diagrams (DFD), Resouces Events Agent (REA), Form Design, Information System Implementation. The result of the study was that the purchasing accounting information system had answered the company's needs in terms of: 1. time effectiveness on recapitulating the purchased order data, 2. Minimizing errors occured in the type and amount of goods to be purchased.

PERANCANGAN SISTEM INFORMASI MANAJEMEN KEUANGAN DI AMIK GARUT

2020 ◽  
Vol 2 (2) ◽  
pp. 128-143
Author(s):  
Tedi Budiman
Keyword(s):  
Information System ◽  
Information Systems ◽  
Financial Management ◽  
Financial Information ◽  
Financial Problems ◽  
Technological Advances ◽  
Design Program ◽  
Or Groups ◽  
The Cost ◽  
Financial Information Systems

Financial information system is an information system that provides information to individuals or groups of people, both inside and outside the company that contains financial problems and information about the flow of money for users in the company. Financial information systems are used to solve financial problems in a company, by meeting three financial principles: fast, safe, and inexpensive.Quick principle, the intention is that financial information systems must be able to provide the required data on time and can meet the needs. The Safe Principle means that the financial information system must be prepared with consideration of internal controls so that company assets are maintained. The Principle of Inexpensive, the intention is that the cost of implementing a financial information system must be reduced so that it is relatively inexpensive.Therefore we need technology media that can solve financial problems, and produce financial information to related parties quickly, safely and cheaply. One example of developing information technology today is computer technology and internet. Starting from financial problems and technological advances, the authors make a website-based financial management application to facilitate the parties that perform financial management and supervision.Method of development application program is used Waterfall method, with the following stages: Software Requirement Analysis, Software Design, Program Code Making, Testing, Support, Maintenance.

Strategies of maintenance and repair of agricultural machinery

2020 ◽  
pp. 38-48
Author(s):  
Aleksey S. Dorokhov ◽  
Aleksandr V. Denisov ◽  
Aleksey A. Solomashkin ◽  
Valeriy S. Gerasimov
Keyword(s):  
Wear Rate ◽  
Technical Condition ◽  
Research Purpose ◽  
Agricultural Machinery ◽  
Maintenance And Repair ◽  
Wear Rates ◽  
Urgent Task ◽  
Machine Parts ◽  
Current Value ◽  
Agricultural Machines

Modern machines are subject to progressive wear that occurs at different rates, which leads to unpredictable failures that reduce the reliability and durability of machines. The strategy of maintenance and repair is aimed at eliminating these problems. (Research purpose) The research purpose is in analyzing the basic principles of the strategy of maintenance and repair of agricultural machinery in order to ensure control of the technical condition of machine parts. (Materials and methods) When resource diagnostics is used, , the allowable value of the parameter is set in advance for a part . This value is the tolerance that corresponds to a certain wear rate of the part. The tolerance is set based on the condition that if the current value of the controlled resource parameter during the next diagnosis is less than the set value, then such a part at the current value of the wear rate can be finalized until the next inter-control check. Taking into account the wear rate of the same type of parts from the group when determining the allowable wear during their resource diagnostics becomes an urgent task. (Results and discussions) As a result of research, the article presents "Methodology for determining the main indicators of reliability of parts of agricultural machines with different wear rates" and "Methodology for determining the tolerance system of parts of agricultural machines with different wear rates". (Conclusions) The article presents the tolerance system that reduces the probability of failure of machine parts in operation. During resource diagnostics, those parts whose resource parameters exceed the tolerance are rejected.

scholarly journals Punishment Strategies across Societies: Conventional Wisdoms Reconsidered

Games ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 63
Author(s):  
Ramzi Suleiman ◽  
Yuval Samid
Keyword(s):  
Public Goods ◽  
Strong Predictor ◽  
Social Environments ◽  
Public Goods Game ◽  
The Public ◽  
Free Riders ◽  
The World ◽  
Emergence Of Cooperation ◽  
Using Data ◽  
The Cost

Experiments using the public goods game have repeatedly shown that in cooperative social environments, punishment makes cooperation flourish, and withholding punishment makes cooperation collapse. In less cooperative social environments, where antisocial punishment has been detected, punishment was detrimental to cooperation. The success of punishment in enhancing cooperation was explained as deterrence of free riders by cooperative strong reciprocators, who were willing to pay the cost of punishing them, whereas in environments in which punishment diminished cooperation, antisocial punishment was explained as revenge by low cooperators against high cooperators suspected of punishing them in previous rounds. The present paper reconsiders the generality of both explanations. Using data from a public goods experiment with punishment, conducted by the authors on Israeli subjects (Study 1), and from a study published in Science using sixteen participant pools from cities around the world (Study 2), we found that: 1. The effect of punishment on the emergence of cooperation was mainly due to contributors increasing their cooperation, rather than from free riders being deterred. 2. Participants adhered to different contribution and punishment strategies. Some cooperated and did not punish (‘cooperators’); others cooperated and punished free riders (‘strong reciprocators’); a third subgroup punished upward and downward relative to their own contribution (‘norm-keepers’); and a small sub-group punished only cooperators (‘antisocial punishers’). 3. Clear societal differences emerged in the mix of the four participant types, with high-contributing pools characterized by higher ratios of ‘strong reciprocators’, and ‘cooperators’, and low-contributing pools characterized by a higher ratio of ‘norm keepers’. 4. The fraction of ‘strong reciprocators’ out of the total punishers emerged as a strong predictor of the groups’ level of cooperation and success in providing the public goods.

scholarly journals Electoral Incentives and the Allocation of Public Funds

2020 ◽  
Author(s):  
Frederico Finan ◽  
Maurizio Mazzocco
Keyword(s):  
Electoral System ◽  
Policy Reforms ◽  
Public Funds ◽  
Term Limit ◽  
The Public ◽  
Public Projects ◽  
Electoral Incentives ◽  
Using Data ◽  
The One ◽  
The Cost

Abstract Politicians allocate public resources in ways that maximize political gains, and potentially at the cost of lower welfare. In this paper, we quantify these welfare costs in the context of Brazil’s federal legislature, which grants its members a budget to fund public projects within their states. Using data from the state of Roraima, we estimate a model of politicians’ allocation decisions and find that 26.8% of the public funds allocated by legislators are distorted relative to a social planner’s allocation. We then use the model to simulate three potential policy reforms to the electoral system: the adoption of approval voting, imposing a one-term limit, and redistricting. We find that a one-term limit and redistricting are both effective at reducing distortions. The one-term limit policy, however, increases corruption, which makes it a welfare-reducing policy.

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