Searched for: subject:"maintenance"
(1 - 20 of 124)

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Leontaris, G. (author), van den Boomen, M. (author), Spaan, M.T.J. (author), Wolfert, A.R.M. (author)
The optimal moment at which maintenance activities should be performed on structures with long service-life to guarantee the required quality of service is hard to define, due to uncertainties in their deterioration processes. Most of the developed methods and concepts use historical data to predict the deterioration process with deterministic...
journal article 2019
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Su, Z. (author)
Maintenance is crucial for the proper functioning and lifetime extension of a railway infrastructure network, which is composed of various infrastructures with different functions. In this thesis we develop robust and tractable model-based approaches for maintenance optimization of railway infrastructure networks. In addition, we develop a...
doctoral thesis 2018
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Nunez Vicencio, Alfredo (author), Jamshidi, A. (author), Wang, H. (author)
This paper presents a Pareto-based maintenance decision system for rail welds in a regional railway network. Weld health condition data are collected using a train in operation. A Hilbert spectrum-based approach is used for data processing to detect and assess the weld quality based on multiple registered dynamic responses in the axle box...
journal article 2018
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Aziabah Akanvose, A.B. (author)
In Ghana, public housing which is provided mainly for government employees plays an important role in socio-economic development. For instance, civil servants are more likely to accept transfers to areas where their services are most needed. Unfortunately, attention to public housing in Ghana has diminished over the years largely due to shift in...
doctoral thesis 2018
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Ruiz Arenas, S. (author)
Typically, emerging system failures have a strong impact on the performance of industrial systems as well as on the efficiency of their operational and servicing processes. Being aware of these, maintenance and repair researchers have developed multiple failure detection and diagnosis techniques that allow early recognition of system or...
doctoral thesis 2018
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van Oosterhout, J. (author)
The success of future fusion power plants as a sustainable energy source greatly depends on their uptime. This uptime relies on the plant's maintenance, which must be performed via tele-manipulation. Tele-manipulated maintenance is challenging, as exemplified by strictly selected and highly trained operators who still require more time to work...
doctoral thesis 2018
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Mazidi, P. (author)
With increase in the number of sensors installed on sub-assemblies of industrial components, the amount of data collected is rapidly increasing. These data hold information in the areas of operation of the system and evolution of health condition of the components. Therefore, extracting the knowledge from the data can bring about significant...
doctoral thesis 2018
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Palomba, F. (author), Panichella, A. (author), Zaidman, A.E. (author), Oliveto, Rocco (author), De Lucia, Andrea (author)
Code smells are symptoms of poor design or implementation choices that have a negative effect on several aspects of software maintenance and evolution, such as program comprehension or change- and fault-proneness. This is why researchers have spent a lot of effort on devising methods that help developers to automatically detect them in source...
journal article 2018
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Jamshidi, A. (author), Hajizadeh, S. (author), Su, Z. (author), Naeimi, M. (author), Nunez Vicencio, Alfredo (author), Dollevoet, R.P.B.J. (author), De Schutter, B.H.K. (author), Li, Z. (author)
In this paper, a decision support approach is proposed for condition-based maintenance of rails relying on expert-based systems. The methodology takes into account both the actual conditions of the rails (using axle box acceleration measurements and rail video images) and the prior knowledge of the railway track. The approach provides an...
journal article 2018
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Finavaro Aniche, M. (author), Bavota, Gabriele (author), Treude, Christoph (author), Gerosa, Marco Aurélio (author), van Deursen, A. (author)
Previous studies have shown the negative effects that low-quality code can have on maintainability proxies, such as code change- and defect-proneness. One of the symptoms for low-quality code are code smells, defined as sub-optimal implementation choices. While this definition is quite general and seems to suggest a wide spectrum of smells that...
journal article 2018
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van den Boomen, M. (author), van den Berg, P.L. (author), Wolfert, A.R.M. (author)
In the next decades, many public infrastructure assets will reach the end of their life that they were originally designed for. Replacement costs are high, and therefore increasing effort is put into lifetime-extending maintenance, including major overhauls and renovations. A key question is whether the investments in lifetime-extending...
journal article 2018
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Callewaert, Pieter (author), Verhagen, W.J.C. (author), Curran, R. (author)
A decision support framework is proposed, allowing for the integration of aircraft maintenance work progress monitoring into the aircraft maintenance planning decision support process. The framework is able to monitor the progression of planned maintenance by analysing real-time data on work progress. This can be used to explore optimal task...
conference paper 2018
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van Bijnen, J.A.C. (author), Korving, J.L. (author), Langeveld, J.G. (author), Clemens, F.H.L.R. (author)
Due to a variety of contaminants in floodwater, exposure to urban pluvial flooding may pose a health risk to humans. In-sewer defects may cause increased pluvial flooding, possibly increasing health risks. This paper addresses the impact of in-sewer defects on urban pluvial flooding and, subsequently, on infection probabilities for humans. As...
journal article 2018
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Xie, Wei (author), Nunez Vicencio, Alfredo (author), Maas, Ron (author), Li, Z. (author)
This paper presents a methodology to support decision making based on the tram wheel-rail interface condition. The methodology relies on the following measurements: tram failure log-files regarding wheel-sliding events, monitored acoustics data and open source weather information. The proposed methodology consists of three stages: 1) data...
conference paper 2018
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Su, Z. (author), De Schutter, B.H.K. (author)
We consider optimal scheduling of track maintenance activities for a railway network divided into sections. The goal is to find an optimal time schedule for the maintenance activities and optimal routes for the maintenance crew (including all necessary equipment and technicians) that minimize the total setup costs and the travel costs over...
conference paper 2018
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Verhagen, W.J.C. (author), De Boer, Lennaert W.M. (author)
Unscheduled maintenance can contribute significantly to an airline's cost outlay. Reliability analysis can help to identify and plan for maintenance events. Reliability analysis in industry is often limited to statistically based approaches that incorporate failure times as the primary stochastic variable, with additional strict assumptions...
journal article 2018
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Narayanan, Prasobh (author), Verhagen, W.J.C. (author), Dhanisetty, V.S.V. (author)
Airline Maintenance and Engineering (M&E) organizations face accidental damages on their fleet of aircraft as part of daily practice. As this type of damage is stochastic in nature, the approach towards repairing accidental damage is reactive in practice. However, it is possible to predict future long-term (strategic) demand for maintenance...
conference paper 2018
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Oosting, R.M. (author), Wauben, L.S.G.L. (author), Groen, R.S. (author), Dankelman, J. (author)
Shortages of medical equipment in low-and-middle income countries (LMICs) have been found by several previous studies that assessed surgical capacity. To increase surgical capacity, there is a need to identify the availability of specific types of surgical equipment on a local, regional and national level. A survey was conducted among surgeons...
journal article 2018
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Van Aken, Sander (author), Besinovic, Nikola (author), Goverde, R.M.P. (author)
During infrastructure maintenance possessions, commonly not all trains can operate, and the original timetable may have to be adjusted accordingly. To deliver the best service to passengers, operators have to coordinate adjustment measures dealing with multiple possessions at the network level. In this paper, we consider the Train Timetable...
journal article 2017
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Lu, G. (author)
Luminous flux maintenance and color stability are two important factors to evaluate the lighting quality. Where a significant amount of research efforts are performed on the former and even some standards have been generated for lumen decay acceleration, research activities and achievements on the latter are lagging behind. DOE Energy Star...
doctoral thesis 2017
Searched for: subject:"maintenance"
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