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Decision Model for Life Cycle Assessment of Power Transformer during Load Violation
S. S. Bhandari,N. Chakpitak,,T. Chandarasupsang
International Journal of Engineering Science and Technology , 2010,
Abstract: Utility have normally planned the power transformer based on its designed load demand for the long term. Due to unexpected penetration, the actual load profile does not always follow the designed load and load violation will occur at some points during the life cycle of the power transformer for which the utility is inevitably required to make strategic decision. In the past, the decisions were mainly focused on the technical condition of the assetwithout any consideration to investment budget limitation. In this paper, an alternative methodology comprising of knowledge based model, financial model and decision criteria is proposed to make an optimal decision during load violation. A generic power system similar to Nepal Electricity Authority’s context was utilized as a case study. The result depicts that this model can effectively assess the life cycle of power transformer balancing both the financialand technical constraints.
A Transformer Replacement Decision Method Based on Probability Assessment of Failure Rate  [PDF]
Gang Liang, Shengwei Li, Yan Qi, Jing Cao, Yi Hao, Wenfu Chen
Energy and Power Engineering (EPE) , 2017, DOI: 10.4236/epe.2017.94B080
Reasonable probability assessment of transformer failure rate (FR) is a critical reference to the transformer replacement work. At present, the lack of support theory for transformer replacement usually causes reliability and economy issues for power companies. For this reason, a transformer replacement decision method based on probability assessment of FR is proposed. Firstly, a first order model of transformer paper degradation is proposed. Then, the Weibull Distribution is used by Monte Carlo Simulation (MCS) to generate the variations of Degree of Polymerization (DP) along with time based on the historical data, and the transformer FR is determined. When the FR is higher than a pre-defined threshold value, the transformer should be replaced for reliability purpose. Finally, the effectiveness of the proposed method for the transformer replacement decision is verified by a typical engineering application.
Lucretia Popa,Romeo Dr?gan,George Laz?r,Vasilica ?tefan
Fruit Growing Research , 2012,
Abstract: Need to increase the competitiveness of semi-subsistence farms, by valorisation of the fruits, led to research for designing of an equipment for sorting apples by size, in order to meet market requirement, pricing according to the size of the fruits.
Implementation decision-making model on equipment maintenance improvement

CHEN Hong-gen,

系统工程理论与实践 , 2011,
Abstract: As to the problem of quantitative methods for equipment maintenance improvement implementation decision-making,a house of maintenance improving(HOMI)model was built based on quality function development(QFD).On this basis,a dependent function was established,which took the autocorrelation of decision-making variables existed between the improvement of maintenance demand project and the improvement of technical characteristic in each maintenance implementation into account.Using the multi-objective programmi...
МЕТОДИ ТЕХН ЧНОГО ОБСЛУГОВУВАННЯ РЕМОНТУ НАЗЕМНОГО ОБЛАДНАННЯ ТА ОПТИМ ЗАЦ ПРОФ ЛАКТИЧНИХ ЗАХОД В Methods of maintenance and repair of ground equipment and optimize preventive measures Методы технического обслуживания и ремонта наземного оборудования и оптимизации профилактических мероприятий  [cached]
В.В. Щепетов,О.?. Щепоть?в,В.В. Варюхно,В.Д. Гулевець
Proceedings of National Aviation University , 2006,
Abstract: Проведено анал з стану парку наземного обладнання спецтранспорту аеропорт в. Наведено пропозиц щодо вир шення проблеми техн чного обслуговування ремонту ав ац йно техн ки та оптим зац проф лактичних заход в. The analysis of the state of the ground equipment park of the airport special transport is conducted and suggestions in decision of problem of technical service and repair of this technique and optimization of prophylactic measures are given. Проведен анализ состояния парка наземного оборудования спецтранспорта аэропортов. Приведены предложения по решению проблемы технического обслуживания и ремонта авиационной техники и оптимизации профилактических мероприятий.
Lex et Scientia , 2010,
Abstract: The development of the Information Technology and the large scale use of the modern cutof-the-edge means of electronic communications constitute an undisputable progress of the Knowledge Society and the creation of the new social relations based on these platforms necessitated in time also a change in the Law philosophy. If the communication by electronic means still poses nowadays an attraction for the legal experts and professionals, chiefly for the law enforcement agencies or the intelligence services, another product of science, the location, starts highlighting its benefits but also the legal challenges. The paper aims at presenting the localization of mobile communications devices, both from technical and legal perspectives, with the view to be seen and understood as an Information Society service for the citizens.
A technical note on the armour and equipment for jousting
Williams, Alan,Edge, David,Capwell, Tobias,Tschegg, Stefanie
Gladius , 2012, DOI: 10.3989/gladius.2012.0008
Abstract: This paper discusses the metallurgy of some jousting armours, and other aspects of their equipment. Armours for the joust with sharp lances (scharfrennen) were found to be sometimes thinner than armour for the joust of peace (gestech) but these examples were made of better metal. Appendices discuss the textile padding, which was an integral part of the protection offered by jousting armour, and some of the lances employed in the joust. Este artículo analiza la metalurgia de algunos arneses de justa, y otros aspectos del equipo empleado. Las armaduras para la justa con lanzas afiladas (scharfrennen) han resultado ser en ocasiones más delgadas que las empleados para la ‘justa de paz’ (gestech), pero en este caso estaban realizadas con un metal mejor. Los apéndices analizan los acolchados textiles que eran parte integral de la protección que proporcionaba la armadura de justa, y también algunas de las lanzas empleadas.
A multi-criteria application for an equipment replacement decision
Sarache Castro,William Ariel; Castrillón,Omar Danilo; Gonzales,Guillermo; Viveros Folleco,Amanda;
Ingeniería y Desarrollo , 2009,
Abstract: one of the main problems, in the operations management, is the adequate planning of equipment replacement, not only because of its impact in the operations cost, but also, because of its effects on the service level. for such reason, the present article shows the construction of a procedure for equipment replacement, based on the use of multicriteria techniques and expert methods. the results of this application, in the replacement decision of two equipments for a sugar factory, are presented.
Decision Support Systems - Technical Prerequisites and Military Requirements  [PDF]
Andreas Tolk,Dietmar Kunde
Computer Science , 2010,
Abstract: Decision Support Systems in the sense of online alternative course of action (ACAO) development and analysis as well as tools for online Development of Doctrine and Tactics Techniques, and Procedures (DTTP) for support to operations make it possible to evaluate and forecast the command and control processes and the performance capabilities of the friendly and enemy forces and other decision relevant factors, support the military commander (brigade and higher) and his staff in their headquarter by increasing their ability to identify own opportunities, support all phases of the command and control process, use computer based, automatic and closed models, that can be adapted to the current situation. Objective of the paper is to present the results of studies conducted in Germany on behalf of the German Ministry of Defense with the objective to work out the conceptual basis for decision support systems and to evaluate, how this technique will influence the command and control system of the army of the federal armed forces. In addition, international works are considered as well. In this paper, technical and operational requirements are derived and described in detail that have to be met in order to support the warfighter by integrated means of applied Operations Research ranging from simple optimization algorithms to complex simulation federations comprising different systems.
L. Kovalev,I. Kovalev
Russian Journal of Agricultural and Socio-Economic Sciences , 2012,
Abstract: Justification is given to a technique of application for standards of an expense of resources on conventional unit of complexity and time expenses for services of livestock technical service with a view of economy of resources. Definition of expenses of working hours assumes preliminary studying and an assessment of methods and ways of performance of work, design of rational production technologies of cattle-breeding production, production and work organization. In the countries with the developed market economy methodological and material base for rationing of work of workers is created. A wide circulation receive methods of linear programming, the multiple-factor regressive analysis, versions of statistical methods for expenses studying. In this research material inputs are defined on standard to forming factors with application of the regressive analysis.
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