The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The original methodological approach based on the risks analysis and optimization is proposed to research variants for developing hydrocarbon deposits of Arctic regions. The basic analytical problems that are due to be solved by probabilistic modelling of processes are formulated. Input and otput allow to research different variants for developing hydrocarbon deposits of Arctic regions. Some effects...
The aim of this article is to identify and discuss some issues related to functional safety and security management in hazardous industrial plants. The safety functions are to be realised using the electric / electronic / programmable electronic systems (E/E/PESs) or the safety instrumented systems (SISs) that are designed and operated respectively according to IEC 61508 and IEC 61511 requirements...
The main aim of the paper is to translate reliability problems to the knapsack optimization problem. The review of the known methods of multi-criteria optimization is done. Particularly, the SPEA algorithm is presented. Furthermore, the 0-1 knapsack problem solution by SPEA algorithm is introduced and used to the reliability optimization of exemplary parallel-series system.
Modelling and prediction of the operation and reliability of technical multistate ageing systems related to their operation processes called complex systems are briefly presented and applied to prediction of the operation processes and reliability characteristics of an exemplary complex non-homogeneous system composed of a series-parallel and a series-“m out of l” subsystems linked in series, changing...
Nuclear power plants benefit from a sophisticated and comprehensive safety regime that has been established over the years. However, the security regime for nuclear power plants is far less developed than the safety regime. Although adopting (and adapting) certain elements of the nuclear safety regime could significantly strengthen the nuclear security regime, at least four challenges are likely to...
The paper considers determinants of construction of the mathematical model describing in a macro scale a stream of cargo, flowing through a container terminal equipped with an extended pre-gate. Accordingly, the work analyzes the handling points and channels of container’s flows at a hypothetical terminal, as well as opportunities allowing to increase the flow’s efficiency by changing the random stream...
A security level of distributed control and protection system may have a significant impact on the results of functional safety analysis. However, the issue of integrating the safety and security aspects is difficult and usually is neglected during the functional safety analysis. This article presents a method of functional safety analysis which takes into consideration a concept of integrating these...
The paper deals with non-renewal multistate monotone systems consisting of multistate components which are modeled by the semi-Markov processes. In the case of a non-renewal system the multistate reliability functions of the system components and the whole system are discussed. All presented concepts and models are illustrated by simple numerical examples.
Critical Infrastructure (CI) Preparedness and Resilience modelling, simulation & analysis (MS&A) receive a strong interest from systems safety and risk management engineering and research communities. This technical and scientific interest responds to the rapid growth of the use of the smart technology in the modern society activities. The concept of resilience in CIP is not yet clearly defined...
The paper presents analytical and Monte Carlo simulation methods applied to the reliability evaluation of a system operating in two different operation states. A semi-Markov process is applied to construct the system operation model and its main characteristics are determined. Analytical linking of this operation model with the system reliability model is proposed to get a general reliability model...
The article presents the demands concerning data security in distributed building automation systems and shows the need for providing additional mechanisms of secure communication in the KNX system. Three different methods developed for KNX data protection are discussed: EIBsec, KNX Data Security and the author’s method. Their properties are compared and potential areas of application are presented.
The paper presents selected problems of risk management in respect of ship collisions with bridges. Accident statistics in Poland and around the world are presented. Wide discussion on bridge collapse risk acceptance criteria have been carried out. Finally to different case studies of probability assessment taking into account both horizontal and vertical clearances.
In the paper an approach to the reliability analysis of multi-state systems with dependent components operating at variable operation conditions is presented. The multi-state reliability function of complex system is defined and determined for the shipyard rope ship elevator. In developed models, it is assumed that system components have the multi-state exponential reliability functions with interdependent...
The author’s monograph “Semi-Markov Processes: Application in System Reliability and Maintenance” which will be published by Elsevier in 2014 is presented. The paper is composed of an introduction, the monograph contents, conclusions and the references the monograph contents is based on.
The article is showing some concept of critical infrastructure system’s safety states model. Model construction is basing on popular technical systems’ safety states models, and notions specified in acts of law related to crisis management and other studies concerning it. Implementation of crisis management issues and problems into technical systems’ safety states model, resulted with formulating...
There are presented general safety analytical models of complex multistate technical systems related to their operation processes. They are the integrated general models of complex technical systems, linking their multistate safety models and their operation processes models and considering variable at the different operation states safety structures and their components safety parameters. The conditional...
Because of the growing operational age of nuclear power plants, the ageing management of structures, systems and components used in these plants is gaining an important role. Technical systems are subject to timedependent and operationally caused ageing phenomena with modifications of originally given characteristics and, thus, of relevance in terms of safety. Especially physical ageing is of importance...
The main aim of the paper is to use algorithms and parameters of graph theory as tool to analyze the transpiration systems. To realize this goal the well-known information about graph theory algorithms and parameters will be introduced and described. The possible application of graph theory algorithms and parameters to analyze the critical infrastructures of exemplary transportation system will be...
Sea borders are identified as a major entry point in EU. In order to be adequately prepared to manage illegal immigrant’s inflow and mitigate the significant socioeconomic impact. The present paper introduces a comprehensive risk analysis methodological framework for the analysis of the present situation, risk prioritization and mitigation analysis. The proposed approach will be applied to a specific...
In the article authors are interested in the issues of LCC analysis implementation in the area of passenger transportation systems performance. In the first step of research analysis, there is provided a briefly literature overview of the analysed research area. Thus, the applicability of LCC analysis is investigated on the existing passenger transportation system located in Lower Silesia, Poland.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.