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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.
In the paper there are presented basic concepts and some results of the theory of semi-Markov decision processes. The optimization problem for the infinite duration SM process is connsider in the paper. The Howard algoritm which enables to find the optimal stationary strategy is also discussed here. The algorithm is applied in a decision problem concerning the two components renewable series system...
The combination of the results on the reliability of complex multi-state systems related to their operation processes and the results concerning the limit reliability functions of the multistate systems is proposed, to obtain the results on the asymptotic approach to the evaluation of the large complex multi-state systems reliability at the variable operation conditions. The asymptotic approach to...
Road safety modelling on regional level of NUTS 2 in the EU is the complex issue ant authors of this article indicate this in previous publications. During multivariate models development they discovered that it is difficult to make regression model well described all regions, even if they are from one country. In the first step Poisson model of road fatality rate as fatalities per 100 thou of citizens...
Water supply system is complicated technical system which belongs to underground urban infrastructure. Its accurate functioning determines everyday live stability of citizens. Risk analysis is a key phase of the process of water supply safety management. The aim of this paper is to present new propose of methods for risk of the first type (associated with quantity of supplied water) and the risk of...
The author’s latest monograph “Reliability of large and complex systems” 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 presents the safety conditions of delivery to trade in the centre of city in Poland. The results are based on surveys the real 900 stores. This article analyses of reports the institution of the General Inspectorate of Road Transport. Indicated in the dependence of safe delivery of compliance with legal rules. Cause to write this article is situation on polish roads with delivery vehicles.
In this work, the Metropolis-Hastings sampling technique has been used for the parameter identification of Wohler curve of aluminium alloy 2024-T4. The Metropolis-Hasting algorithm is one of the most widespread Markov chain Monte Carlo methods for posterior distribution estimation, and it is presented with an adaptive formulation to estimate the probability density functions of Wohler parameters....
Process of suppliers selection, as well as cooperation between suppliers and manufacturers, are a significant problem for today’s companies. Producers negotiate and arrange with their subcontractors to ensure a continuity of production. Following this, one of the major problem is supplier evaluation and supply risk assessment in order to avoid delays, which may seriously affect the producers’ ability...
The paper presents an analysis of the accident between a passenger ship moving on the route Swinoujscie Ystad with tanker carrying hazardous substances category X. In order to assess the safety of navigation in the study area the authors have developed a probabilistic domain, which aims to estimate the number of incidents of navigation on the basis of real data from AIS and to find potentially dangerous...
The aim of this article is to identify and discuss some issues of the safety systems’ design for nuclear power plants equipped with the light water reactors using a defence in depth (D-in-D) conception. Because the functional safety solutions play nowadays an important role for the risk control, the basic requirements for the instrumentation and control systems are specified with regard to relevant...
The problem of equipment functioning reliability in gas transport systems is extremely urgent. This article deals with the algorithm of estimation and prediction of reliability factors of gas-compressor units and automatic systems, which uses statistical information about elements failures as input data. This algorithm is based on methods of mathematical statistics and regression analysis and provides...
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