2005/11 Scientific papers, Series B
https://hdl.handle.net/10195/38182
2024-03-19T05:23:22ZDynamics of a two - phase fluid alternating flow (FAF) mechanism with a linear hydraulic motor
https://hdl.handle.net/10195/32149
Dynamics of a two - phase fluid alternating flow (FAF) mechanism with a linear hydraulic motor
Turza, Jozef; Gullerová, Monika
U klasických hydraulických mechanizmov je prietok kvapaliny vo vedení medzi hydrogenerátorom a hydromotorom jednosmerný. V mechanizmoch so striedavým prietokom kvapalina vo vedení vykonáva vratný pohyb. Tlak a prietok má v ustálenom stave periodický priebeh. Mechanizmov so striedavým prietokom kvapaliny, (ďalej len SPK), je z hl'adiska počtu fáz viacej druhov. Najväčšie uplatnenie nachádzajú dvojfázové mechanizmy so SPK. Sú vhodné všade tam, kde je potrebný trvalý striedavý pohyb výkonného člena, ako sú napr. pol'nohospodárske kosačky, vytriasacie mechanismy strojov, textilné tkacie stavy, zariadenia pre únavové skúšky a pod. Oproti klasickým vačkovým, alebo kl'ukovýmmechanizmom majú výhodu nezávislého priestorového usporiadania na strojnom zariadení a jednoduchú možnosť ochrany voči preťaženiu. Pre posúdenie funkčných vlastností dvojfázového mechanizmu je dôležitá jeho dynamická analýza, urobená v predloženom príspevku.
2006-01-01T00:00:00ZPractical aspects of JIT
https://hdl.handle.net/10195/32147
Practical aspects of JIT
Průša, Petr; Tilkeridis, David; Kampf, Rudolf
In today’s production practice the concept of JIT is connected to many factors which significantly decide its success or failure. These factors can be understood both like premises and like consequences. To find and describe these factors needs deep analysis and long practical surveys. Generally the core of these factors can be found in the concept of lean production. Before implementing JIT in live, mainly following factors (methods) shall be considered: Pull scheduling in Heijunka concept, Rapid setup, TQM, OEE, Jidoka and program of 5S and 3M. Each company to run JIT shall decide the prevention policy and necessary steps in order to avoid problems which may occur shortly after the implementation phase of JIT. If these factors are not well taken into account, the JIT concept itself will be a good indicator of company weaknesses (e.g. bad quality, long setup of machines, unreliable supplier) which will guarantee occur once the stock level goes down, but company will suffer from these quite a long time and finally may give up JIT at all. Nowadays kanban can be proposed as a useful driver of JIT in most companies, but the concept of this method needs precise rules and strict follow-up activities in practice.
2006-01-01T00:00:00ZClassification based on stable fuzzy decision tree method
https://hdl.handle.net/10195/32143
Classification based on stable fuzzy decision tree method
Levashenko, Vitaly; Kovalík, Štefan; Matiaško, Karol
Decision tree induction is one of useful approaches for extracting classification knowledge from set instances. Considerable part of these instances obtains from formal analysis and modeling of human activities, which has fuzzy nature. It is often the case that real-world tasks can be handled easily by humans, they are often too difficult to be handled by machines. Fuzzy logic allows us to describe this problem. Fuzzy decision tree is a very popular method for fuzzy classification. We introduced term of cumulative information estimations based on Theory of Information approach. We used these cumulative estimations for synthesis of different criteria of decision tree induction. Usage these criteria allow us to produce new type of trees. In this paper we introduce Stable Ordered Fuzzy Decision Tree (FDT). The tree is oriented to parallel and stable processing of input attributes with differing cost. Usage this FDT allows us to realize a sub-optimal classification. Such classification detect a sequence of checks of input attributes with minimize the check-up cost. Also we introduce transformation process from FDT to fuzzy rules set. The results of this paper may be used for design of fuzzy decision-making or expert systems, which based on fuzzy rules set “if x is A and y is B then z is C”
2006-01-01T00:00:00ZCorporate identity as one of the important management activity
https://hdl.handle.net/10195/32117
Corporate identity as one of the important management activity
Strišš, Jozef; Vodák, Jozef
Paper is dealing with Corporate identity (CI) as one of the important management processes in marketing. We try to show CI history, principles, possibilities and experiences of using it in the context and conditions of Slovak republic. This article offers a set of useful rules for successful implementation CI in the organisation. This paper characterises individual parts of Corporate identity as the part of managerial process known as effective marketing communication of those organizations that want to increase their competitiveness.
2006-01-01T00:00:00Z