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Reliability is an important characteristic of many systems. One of the important steps of reliability analysis is the representation and mathematical description of the analyzed system. Binary Decision Diagrams (BDDs) are very convenient for representation of large systems, because they can be processed on computers efficiently. The application of this technique in reliability analysis requires the...
Energy Systems are undergoing radical changes, driven by a combination of factors, including full economic cost, efficiency, environmental impact and security-of-supply, while being facilitated by increased deregulation. This complexity can only be dealt with effectively with the rollout of complex ICT systems that will play a significant role in managing, planning, and securing the energy infrastructure...
The primary purpose of this article is the analysis of data that come from 219 radon-mine workers who underwent cytogenetic analysis (or analyses) of peripheral blood lymphocytes. We focused on the connection between the cytogenetic analysis results (the occurrence of different types of chromosomal aberrations — chromatid and chromosome changes and breaks) and the occurrence of carcinoma. We also...
The problem of modeling blood flow can be approached on different levels of accuracy. We investigate a model consisting of two major components: the fluid representing blood plasma and the elastic objects representing all types of cells in blood, e.g. red blood cells. The elastic objects are immersed in the fluid and they interact with each other. Our research is focused on spring-network models of...
Medical survival censored data of 524 patients were evaluated in order to: 1) compare two types of surgical techniques and 2) develop the integrated survival model, who can adjust for other patients characteristics. Evaluated data come from patients who underwent colectomy in the University Hospital in Ostrava. There are used two basic surgical techniques for the colectomy: either classical (open)...
The semi-Markov models is used to describe the complex systems operation processes. This model allows to tie the results of investigations of critical infrastructures inside-dependences together with the results concerned with critical infrastructures outside-dependencies. Linking of the inside and outside complex systems dependencies, under the assumed their structures multi-state models, is the...
Several methods, tools and measures have been developed which highlight the questions about the power systems reliability each from its particular viewpoint. The objective is to review the selected methods in the field of electric power system reliability keeping in mind the complexity of the system and its features. Their review is performed in sense of applicability to conventional sources of energy...
In this paper we consider the cognitive process as a set of different tasks. In particular tasks of clustering, classification and search of association. Described the parameters of similarity of these tasks, hypothesized the possibility of creating a unified methodology for cognitive systems. Shown the possible original architecture of the system, its description, command and data formats, the principles...
In the paper we address a problem of throughput unfairness inherent in the very nature of multirate Wi-Fi networks employing CSMA/CA mechanism. This unfairness exhibits itself through the fact that slow clients consume more airtime to transfer a given amount of data, leaving less airtime for fast clients. The paper introduces analytical models allowing to estimate a fair contention window (CW) size...
Article analyses modern machine vision-based approaches of the rotary kiln monitoring and control which reduces energy consumption and improve clinker quality. Article describes fuzzy advising control unit developed by the authors. It based on sintering zone state assessment, the kiln rotation period and the relative change of the exhaust gases temperature. Advising control rule base for rotary cement...
The concept of Smart Grid technology, which promises highly efficient and dynamic energy systems, has to be backed by suitable information and communication system. The availability and reliability must be important features of the power energy grid. These are features which must satisfy too the communication network built to support it. The paper analyses theoretical basis and presents selected practical...
In this paper we describe fast and easy graph visualization layout we developed. We called it radius degree layout (RDL). RDL can be used for static and also for dynamic (interactive) visualization. RDL is easy to implement in 2D and 3D visualization, it is CPU efficient, also for large graphs, and we can easily orientate in graph using it. In this paper we describe RDL philosophy, implementation,...
The general principles of an estimation of efficiency of functioning of logistical complexes on the basis of modeling with the account of hierarchical construction and influence of the human factor are considered. The indicators of efficiency depending on change of external economic conditions are proved.
The paper presents a hybrid model for pedestrian simulation, which combines three types (granularities) of simulation models — microscopic, mesoscopic and macroscopic. Transfers of pedestrians between zones with different granularity are described in detail. The model is implemented in the simulation tool PedSim, which utilizes agent-oriented architecture ABAsim. Specialized managing agents which...
This paper presents an efficient algorithm using Local search, various heuristics and Tabu search elements, which is capable to find solution for huge instances of the n-queens (hundreds of millions n). The algorithm returns random solutions in short time even on an ordinary personal computer. There is no other faster algorithm in n-Queens bibliography as our presented algorithm so far.
The aim of the article was to explore the possibility of incorporation of mobile technology into university course environment. Quantitative approach in the form of questionnaire was selected as appropriate. Students at the course answered questions focused on their hardware and software equipment, utilization of their devices for the study, curiosity and attitudes towards collaborative project development...
The paper deals with the modelling of interactions among mobile entities (e.g. vehicles, handling equipment, pedestrians) in agent-oriented simulation models of transportation terminals. Presented model of transportation terminal is based on the ABAsim simulation architecture, which provides means for efficient creation of flexible, highly maintainable simulation models of complex service systems...
Bioimage Informatics is a rapidly growing research field that is giving fundamental contributions to research in biology and biomedicine aiming at facilitating the extraction of quantitative information from images. Great advances in biological tissue labeling and microscopic imaging are radically changing how biologists visualize and study the molecular and cellular structures. These devices nowadays...
The implementation method of search motion of mobile robot or group of mobile robots with incomplete or inaccurate sensor data or with failure of one or several sensors in dynamic non-determined environment is described in this paper. Ander the search motion an algorithm for environment research and search of given objects, appearances, characterized areas is considered. The scheme of motion behavior...
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