Wyniki wyszukiwania dla: TIME-VARIANT RELIABILITY

• Dynamic mass measurement in checkweighers using a discrete time-variant low-pass filter

  Publikacja

  • P. Pietrzak
  • M. Meller
  • M. Niedźwiecki

  - MECHANICAL SYSTEMS AND SIGNAL PROCESSING - Rok 2014

  Conveyor belt type checkweighers are complex mechanical systems consisting of a weighing sensor (strain gauge load cell, electrodynamically compensated load cell), packages (of different shapes, made of different materials) and a transport system (motors, gears, rollers). Disturbances generated by the vibrating parts of such a system are reflected in the signal power spectra in a form of strong spectral peaks, located usually in...

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• Assessing Highway Travel Time Reliability using Probe Vehicle Data

  Publikacja

  • P. Olszewski
  • T. Dybicz
  • K. Jamroz
  • W. Kustra
  • A. Romanowska

  - TRANSPORTATION RESEARCH RECORD - Rok 2018

  Probe vehicle data (also known as “floating car data”) can be used to analyze travel time reliability of an existing road corridor in order to determine where, when, and how often traffic congestion occurs at particular road segments. The aim of the study is to find the best reliability performance measures for assessing congestion frequency and severity based on probe data. Pilot surveys conducted on A2 motorway in Poland confirm...

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• Reliability Testing of Wind Farm Devices Based on the Mean Time to Failures

  Publikacja

  • S. Duer
  • M. Woźniak
  • J. Paś
  • K. Zajkowski
  • A. Ostrowski
  • M. Stawowy
  • Z. Budniak

  - ENERGIES - Rok 2023

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• Analytical and reliability data from the real-time simulator biogas plant

  Dane Badawcze

  open access

  • E. Piesik
  • M. Śliwiński
  • D. Świsulski

  The dataset represents the results of biogas plant simulation. The described plant is an agricultural biogas system, which can produce electrical energy with power estimated up to 1070 kW and heat energy that can reach 1200 kW simultaneously.

• Reliability Testing of Wind Farm Devices Based on the Mean Time between Failures (MTBF)

  Publikacja

  • S. Duer
  • M. Woźniak
  • J. Paś
  • K. Zajkowski
  • D. Bernatowicz
  • A. Ostrowski
  • Z. Budniak

  - ENERGIES - Rok 2023

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• Advances in Modelling and Analysis of Strength of Corroded Ship Structures

  Publikacja

  • K. Wołoszyk
  • Y. Garbatov

  - Journal of Marine Science and Engineering - Rok 2022

  The present study reviews the recent advances in modelling and analyses the strength of corroded ship structures. Firstly, the time-variant methodologies that consider only the mean structural element thickness loss due to corrosion degradation are identified. Corrosion degradation is regarded as the phenomenon that causes uneven thinning of specimens. This has been captured by various researchers as the loss of mechanical properties...

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• Metoda analizy wielokryterialnej do planowania rozwoju sieci elektroenergetycznej średniego i niskiego napięcia

  Publikacja

  • P. Bućko
  • J. Buriak
  • K. Dobrzyński
  • M. Jaskólski
  • P. Skoczko
  • P. Zieliński

  - Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej - Rok 2015

  W artykule przedstawiono metodę wspomagającą decyzje w zakresie wyboru wariantu przyłączenia odbioru do sieci elektroenergetycznej dystrybucyjnej niskiego napięcia lub średniego napięcia oraz mikrogeneracji do sieci niskiego napięcia. Metodę tą zaimplementowano w skoroszycie kalkulacyjnym Microsoft Excel i zastosowano do analizy złożonych przypadków przyłączenia odbioru lub mikrogeneracji.

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• Journal of Polish Safety and Reliability Association, Summer Safety and Reliability Seminars

  Czasopisma

  ISSN: 2084-5316

• Reliability of Structures

  Kursy Online

  Reliability of Structures, 2nd grade studies, Civil Engineering

• Bypass kolejowy dla wiaduktu łukowego i kratownicowego w ciągu modernizowanej linii kolejowej E59 na odcinku Wronki – Dobiegniew

  Publikacja

  • A. Makowska
  • C. Najda
  • A. Banaś

  - Mosty - Rok 2021

  W artykule przedstawiono realizacje bypassu kolejowego, zlokalizowanego nieopodal miejscowości Krzyż Wielkopolski w ciągu linii kolejowej E59 na skrzyżowaniu z linią kolejową 203. Wariantowa analiza kilku zaproponowanych rozwiązań wykazała, ze wykonstruowanie bypassu na czas prowadzenia prac modernizacyjnych pozwoli na utrzymanie ciągłości ruchu kolejowego, nie stworzy nadmiernych problemów podróżnym, a jednocześnie pozwoli na...

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• MICROELECTRONICS RELIABILITY

  Czasopisma

  ISSN: 0026-2714

• Wybrane elementy logistycznej obsługi klienta

  Publikacja

  • K. Grzelec

  - Przegląd Komunikacyjny - Rok 2016

  Marketing relacji zakłada wynegocjowaną obietnicę obsługi, która na rynku transportu miej-skiego oznacza pewność zrealizowania usługi przewozowej dla określonego pasażera, w danej relacji, danym środkiem transportu, po określonej cenie, w oczekiwanych warunkach przewozu i w założonym przez organizatora transportu zbiorowego czasie. Uniwersalność zasad obsługi klienta powoduje, że Zarząd Komunikacji Miejskiej w Gdyni od początku...

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• Wpływ modernizacji linii kolejowych na poprawę wybranych parametrów techniczno - eksploatacyjnych

  Publikacja

  • R. Licow
  • F. Tomaszewski

  - Przegląd Komunikacyjny - Rok 2015

  W artykule przedstawiono pojęcie jakości robót inwestycyjnych poszczególnych elementów infrastruktury kolejowej oraz metody jej oceny. Skupiono uwagę na jakości początkowej nawierzchni kolejowej po pracach modernizacyjnych na sieci Polskich Linii Kolejowych. Wskazano błędy oraz najczęstsze problemy techniczne występujące w trakcie trwania robót oraz po ich zakończeniu na poszczególnych etapach odbiorów. Opisano wpływ jakości początkowej...

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• Standardy Profesjonalnego Public Relations

  Publikacja

  • J. Barlik
  • E. Hope
  • J. Olędzki
  • K. Wojcik

  - Rok 2020

  " Standardy przedstawiają wartości i pryncypia uzasadniające konieczność dokonywania odpowiednich wyborów. Public relations ma godzić interesy zleceniodawców, przedstawicieli mediów i różnych grup społeczeństwa, a przy tym pozostawać w zgodzie z normami etycznymi i odwoływać się do takich wartości jak szacunek, godność, rzetelność, uczciwość, prawda, wiarygodność, niezależność, lojalność i zaufanie. Opracowanie "Standardów profesjonalnego...

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• RELIABILITY ENGINEERING & SYSTEM SAFETY

  Czasopisma

  ISSN: 0951-8320 , eISSN: 1879-0836

• Spatially variant PSF modeling in confocal macroscopy

  Publikacja

  • A. Jezierska
  • H. Talbot
  • J. Pesquet

  - Rok 2018

  The point spread function (PSF) of imaging systems plays an essential role in image reconstruction. In the context of confocal microscopy, optical performance degrades towards the edge of the field of view. In confocal macroscopy, the related artifacts are even stronger, as the field of view is much larger. Because the related PSFs are strongly spatially variant, it is essential to be able to model them with few parameters. The...

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• Application Isssues of the Semi-Markov Reliability Model

  Publikacja

  • J. Rudnicki

  - Polish Maritime Research - Rok 2015

  Predicting the reliability of marine internal combustion engines, for instance, is of particular importance, as it makes it possible to predict their future reliability states based on the information on the past states. Correct reliability prediction is a complex process which consists in processing empirical results obtained from operating practice, complemented by analytical considerations. The process of technical state changes...

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• Modelling Signalised Intersections Reliability of Functioning

  Publikacja

  • O. Krzysztof
  • M. Budzyński

  - IOP Conference Series: Materials Science and Engineering - Rok 2019

  The article addresses a fundamental aspect of traffic, i.e. the operation of traffic signals at intersections, in reference to the reliability theory. In many cases, when intersections carry substantial amounts of traffic, selecting control parameters to produce satisfactory traffic conditions is quite difficult. Design methods do not cover all possible situations which are the result of intersection geometry and location...

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• VARIANT DESIGNING IN the PRELIMINARY SMALL SHIP DESIGN PROCESS

  Publikacja

  • A. Karczewski
  • J. Kozak

  - Polish Maritime Research - Rok 2017

  Ship designing is a complex process, as the ship itself is a complex, technical multi-level object which operates in the air/water boundary environment and is exposed to the action of many different external and internal factors resulting from the adopted technical solutions, type of operation, and environmental conditions. A traditional ship design process consists of a series of subsequent multistage iterations, which gradually...

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• Time

  Czasopisma

  ISSN: 0040-781X

• Methodological issues of functional safety and reliability assessment of critical systems in industrial hazardous plants

  Publikacja

  • K. Kosmowski

  - Journal of Polish Safety and Reliability Association, Summer Safety and Reliability Seminars - Rok 2015

  The aim of this article is to identify and discuss some methodological issues that are of interest among functional safety specialists and experts after publication of the second edition of international standards IEC 61508 and IEC 61511, including the design and implementing the safety-related functions of higher safety integrity levels and protection layers. The basic role of safety-related systems is to reduce effectively and...

• The concept of stream and system reliability on the example of the bakery industry

  Publikacja

  • R. Drozd
  • J. Piwnik

  - Aparatura Badawcza i Dydaktyczna - Rok 2019

  This article presents a new concept of technological system reliability based on the analysis of the relationship of associations of elements of energy streams, matter, information, time and finance. The method of stream specification and the method of determining the reliability values of significant and supporting relationships are given. Relevant relationships between elements of system streams were defined as having one-time...

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• The reliability of tree and star networks

  Publikacja

  • J. Kozłowska

  - STUDIA INFORMATICA. SYSTEMS AND INFORMATION TECHNOLOGY. SYSTEMY I TECHNOLOGIE INFORMACYJNE - Rok 2008

  This paper investigated the reliability of tree and star networks. Following measures of network reliability are assumed: the expected number of nodes, that can communicate with the central node; the expected number of node pairs, that are connected by a path through the central node; the expected number of node pairs communicating.

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• Four-state stochastic model of changes in the reliability states of a motor vehicle

  Publikacja

  • J. Girtler
  • M. Ślęzak

  - Eksploatacja i Niezawodność - Maintenance and Reliability - Rok 2013

  The properties of semi-Markov processes have been generally characterized and the applicability of the theory of such processes to the determining of the reliability of motor cars and other road vehicles has been explained. A formal description of the process of changes in the motor vehicle technical states considered as reliability states and a model of this process in the form of a one-dimensional stochastic process have been...

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• The influence of robotization on the reliability of the production process in the bakery industry

  Publikacja

  • R. Drozd
  • J. Piwnik

  - Aparatura Badawcza i Dydaktyczna - Rok 2019

  This article presents a new concept of technological system reliability based on the analysis of the relationship of associations of elements of energy streams, matter, information, time and finance. The method of stream specification and the method of determining the reliability values of significant and supporting relationships are given. Relevant relationships between elements of system streams were defined as having one-time...

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• Reliability of Structures - 3rd semester, Civil Engineering - Nowy

  Kursy Online

  • M. Skowronek

  Reliability of Structures, 2nd grade studies, Civil Engineering

• Measures of Functional Reliability of Two-Lane Highways

  Publikacja

  • K. Ostrowski
  • M. Budzyński

  - ENERGIES - Rok 2021

  Rural two-lane highways are the most common road type both in Poland and globally. In terms of kilometres, their length is by far greater than that of motorways and expressways. They are roads of one carriageway for each direction, which makes the overtaking of slower vehicles possible only when there is a gap in the stream of traffic moving from the opposite direction. Motorways and express roads are dual carriageways that are...

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• CZYNNIKI DECYDUJĄCE O PRZYDATNOŚCI KOMPUTEROWEGO MODELU PRZEPŁYWÓW W SIECI WODOCIĄGOWEJ

  Publikacja

  • M. Kulbik

  - Rok 2014

  W pracy poddano analizie wielozadaniowy proces tworzenia komputerowego modelu przepływów. W efekcie zidentyfikowano szereg czynników ograniczających obszar stosowania modelu w praktyce inżynierskiej. W zakresie pozyskiwania danych strukturalnych i operacyjnych wskazano potencjalne źródła błędów, które przyczyniają się do zmniejszenia dokładności odwzorowania stanu rzeczywistego. Specjalną rangę nadano specyfikacji czynników związanych...

• RELIABILITY sem. III Summer 2023/24 kopia 2

  Kursy Online

  Reliability of Structures, 2nd grade studies, Civil Engineering

• Selected problems of sensitivity and reliability of a jack-up platform

  Publikacja

  • B. Rozmarynowski
  • T. Mikulski

  - Polish Maritime Research - Rok 2018

  The paper deals with sensitivity and reliability applications to numerical studies of an off-shore platform model. Structural parameters and sea conditions are referred to the Baltic jack-up drilling platform. The study aims at the influence of particular basic variables on static and dynamic response as well as the probability of failure due to water waves and wind loads. The paper presents the sensitivity approach to a generalized...

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• The reliability of tree and star networks.

  Publikacja

  • J. Kozłowska

  - Rok 2008

  One of the important parameters characterizing the quality of computer networks is the network's reliability with respect to failures of the communication links and nodes. This chapter investigated the reliability of tree and star networks. The tree and star topology is used in centralized computer networks. In centralized computer networks all communication must take place through some central computer. Following measures of network...

• Probabilistic Methods in Reliability Assessment of Engineering Lightweight Structures

  Publikacja

  • K. Winkelmann

  - Rok 2018

  The paper considers the probability-based analysis of structural safety measures. Two different numerical examples of representative lightweight structures are considered – a submerged truss tower supporting an offshore platform, and an overhead power line support truss tower. On the basis of these examples, the importance of a motivated selection of analysis method and a proper choice of the number of important variables is shown....

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• Reliability of Corroded Stiffened Plate Subjected to Uniaxial Compressive Loading

  Publikacja

  • K. Wołoszyk
  • Y. Garbatov

  - International Journal of Maritime Engineering - Rok 2020

  The work is focused on the reliability of corroded stiffened plates subjected to compressive uniaxial load based on the progressive collapse approach as stipulated by the Common Structural Rules for Bulk Carriers and Oil Tankers, employing the limit state design. Two different cases have been investigated. In the first model, the corrosion degradation led to uniform thickness loss, whereas the mechanical properties were unchanged,...

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• Overview of Scalability and Reliability Problem in SDN Networks

  Publikacja

  • S. Kaczmarek
  • J. A. Litka

  - Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne - Rok 2016

  In the paper an overview of scalability and reliability in the SDN (Software Defined Networks) networks has been presented. Problems and limitations for guaranteeing scalability and reliability in SDN networks have been indicated. Known methods for assuring scalability and reliability in SDN networks have been described. Projects from research communities for resolving issues with scalability and reliability in SDN networks have...

• Reliability Modeling for SPMD and DAC Applications in MERPSYS

  Publikacja

  • J. Kuchta

  - Rok 2016

  In this chapter we shall see a method for modeling of reliability of application execution in the MERPSYS system, and the results of reliability simulation of the same SPMD and DAC application which we have previously presented in this book. Unlike energy usage modeling and modeling of execution efficiency we could not compare the reliability model and simulation results to real experiment just because the experiment would last too...

• Active Kriging-based conjugate first-order reliability method for highly efficient structural reliability analysis using resample strategy

  Publikacja

  • C. Luo
  • S. Zhu
  • B. Keshtegar
  • W. Macek
  • R. Branco
  • D. Meng

  - COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING - Rok 2024

  Efficient structural reliability analysis method is crucial to solving reliability analysis of complex structural problems. High-computational cost and low-failure probability problems greatly limit the efficiency in structural reliability analysis problems, causing the safety and reliability of the structure to be questioned. In this work, a highly efficient structural reliability analysis method coupling active Kriging algorithm...

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• Jednofazowy falownik napięcia z aktywnym obwodem odsprzęgającym

  Publikacja

  • P. Czyż
  • A. Cichowski
  • W. Śleszyński

  - Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej - Rok 2017

  Znanym zagadnieniem w jednofazowych falownikach napięcia jest pobieranie ze źródła napięcia stałego składowej przemiennej o częstotliwości dwukrotnie większej od częstotliwości generowanej przez falownik. Jednym z rozwiązań problemu jest stosowanie dużej baterii kondensatorów elektrolitycznych, lecz lepszym sposobem z punktu widzenia niezawodności i gęstości mocy przekształtnika jest stosowanie aktywnych układów odsprzęgania mocy....

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• Reliability and Validity of Optoelectronic Method for Biophotonical Measurements

  Publikacja

  • K. Karpienko
  • M. Wróbel
  • R. Urniaż

  - Rok 2013

  Reliability and validity of measurements is of utmost importance when assessing measuring capability of instruments developed for research. In order to perform an experiment which is legitimate, used instruments must be both reliable and valid. Reliability estimates the degree of precision of measurement, the extent to which a measurement is internally consistent. Validity is the usefulness of an instrument to perform accurate...

• Reliability and types of diagnosis in the process of diesel engine operation

  Publikacja

  • J. Girtler

  - Journal of Polish CIMEEAC - Rok 2018

  The article presents complexity of the problem concerning development of diagnosis with defined reliability by a diagnosing system (SDG) on technical condition of marine combustion engines, especially main engines. It was shown that development of the final diagnosis, the so-called initial operation diagnosis, on the operational usability (fDG on PEx) of a main engine in particular, is not possible without prior development of...

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• Reliability of Structures - 3rd semester, Civil Engineering - Winter Semester 2023/24

  Kursy Online

  • K. Winkelmann
  • M. Skowronek

  Reliability of Structures, 2nd grade studies, Civil Engineering

• Reliability estimation of underground horizontal fuel tank limit states

  Publikacja

  • P. Sorn
  • M. Sondej
  • J. Górski

  - Bulletin of the Polish Academy of Sciences-Technical Sciences - Rok 2023

  Fuel tanks are designed with regard to standard loads and operating conditions. The investigations of the paper show the impact of such factors as tank corrosion and other means on the variation of stress fields and deformation of the underground horizontal tank shell. The introduction of probabilistic methods allows for structural reliability assessment. While the computational time of the entire tank FEM model is high, the preliminary...

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• Compact Quasi-Elliptic-Type Inline Waveguide Bandpass Filters With Nonlinear Frequency-Variant Couplings

  Publikacja

  • M. Y. Sandhu
  • A. Lamęcki
  • R. Gómez-García
  • M. Mrozowski

  - IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES - Rok 2023

  This work presents the design techniques to synthesize a class of compact inline quasi-elliptic-type waveguide cavity bandpass filters based on novel nonlinear frequency-variant couplings (NFVCs). These highly dispersive frequency-variant couplings (FVCs) are realized by means of a pair of partial-height posts that are placed at the junctions between every two cavity resonators. Each NFVC produces a transmission pole in between...

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• On reliability assessment of ship machinery system in different autonomy degree; A Bayesian-based approach

  Publikacja

  • A. BahooToroody
  • M. M. Abaei
  • O. Valdez Banda
  • J. Montewka
  • P. Kujala

  - OCEAN ENGINEERING - Rok 2022

  Analyzing the reliability of autonomous ships has recently attracted attention mainly due to epistemic uncertainty (lack of knowledge) integrated with automatic operations in the maritime sector. The advent of new random failures with unrecognized failure patterns in autonomous ship operations requires a comprehensive reliability assessment specifically aiming at estimating the time in which the ship can be trusted to be left unattended....

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• REDUNDANCY AS A WAY INCREASING RELIABILITY OF SHIP POWER PLANTS

  Publikacja

  • W. Tarełko

  - New Trends in Production Engineering - Rok 2018

  One of key ways of assuring a high level of reliability of a ship power plant is to design redundancy of its structural elements, for example redundancy of prime drivers, drivelines etc. This paper deals with issues related to the redundancy as a way increasing dependability of the ship power and propulsion systems. Especially, fundamental characteristics of dependability, major design strategies influencing the reliability, and...

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• Windows in time

  Czasopisma

  ISSN: 2576-5213

• TIME & SOCIETY

  Czasopisma

  ISSN: 0961-463X , eISSN: 1461-7463

• Discrete random variables in reliability calculations of a reticulated shell

  Publikacja

  • P. Sorn
  • J. Górski
  • K. Winkelmann
  • J. Przewłócki

  - Rok 2016

  Implementation of the Point Estimation Method (PEM) in the reliability analysis of a three-dimensional truss structure is presented in the paper. The influence of geometric and material random parameters on the truss load-carrying capacity was investigated. The analysis was performed for different combinations of basic variables. Symmetric and asymmetric cases of snow load were taken to assess the structural reliability. Sensitivity...

• Is mesangial hypercellularity with glomerular immaturity a variant of glomerulosclerosis?

  Publikacja

  • D. Ostalska-Nowicka
  • J. Zachwieja
  • M. Nowicki
  • E. Kaczmarek
  • M. Witt

  - PEDIATRIC NEPHROLOGY - Rok 2007

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• Reliability of production machines in the bakery industry – theoretical and practical issues

  Publikacja

  • R. Drozd

  - Aparatura Badawcza i Dydaktyczna - Rok 2019

  The aim of the article is to present probabilistic models, which were then used to analyze the reliability of production machines in the baking industry. The author conducted research in the period from January 2, 2016 to December 31, 2018 regarding the measurement of reliability of a traditional production system based on a probabilistic concept. Due to the limited scope of the article, reliability calculations for a set of thermo-oil...

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• Real-time Operating Systems - Seminar 2023/4

  Kursy Online

  • M. Pazio

  Page to support seminar clases of Real-time Operating Systems