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05 Dec 1994TL;DR: In this article, a cast cylinder head of light metal incorporates a reinforcement made of a stronger material than the light metal, which consists of a relatively narrow elongated steel plate (6) which stretches in a single piece along all the cylinders.
Abstract: A cast cylinder head of light metal incorporates a reinforcement made of a stronger material than the light metal. The reinforcement consists of a relatively narrow elongated steel plate (6) which stretches in a single piece along all the cylinders. The elongated steel plate (6) is provided with transverse arms (8) which stretch out approximately perpendicularly from the steel plate between the valve port apertures (3a, 4a, 5a, 6a) of each cylinder.
4 citations
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TL;DR: This paper presents an evaluation of parallel performance of a computational fluiddynamics solver on PC-clusters that uses unstructured grids and is parallelized bydomain decomposition using domain decomposition.
Abstract: This paper presents an evaluation of parallel performance of a computational fluiddynamics solver on PC-clusters. The solver uses unstructured grids and is parallelized bydomain decomposition using ...
4 citations
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09 Oct 2018
TL;DR: Applying AR model for each pixel position in the image stack obtained an estimated image of the ground scene which can be used as a reference image for CDA and reveals that ground scene estimates by the AR models is accurate and can be use for change detection applications.
Abstract: Change detection is an important synthetic aperture radar (SAR) application, usually used to detect changes on the ground scene measurements in different moments in time. Traditionally, change detection algorithm (CDA) is mainly designed for two synthetic aperture radar (SAR) images retrieved at different instants. However, more images can be used to improve the algorithms performance, witch emerges as a research topic on SAR change detection. Image stack information can be treated as a data series over time and can be modeled by autoregressive (AR) models. Thus, we present some initial findings on SAR change detection based on image stack considering AR models. Applying AR model for each pixel position in the image stack, we obtained an estimated image of the ground scene which can be used as a reference image for CDA. The experimental results reveal that ground scene estimates by the AR models is accurate and can be used for change detection applications.
4 citations
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TL;DR: In this article, a holder for tape cassettes which includes one or more sleeve-like compartments each of which can receive a cassette and incorporates a slidable locking member is described.
Abstract: A holder for tape cassettes which includes one or more sleeve-like compartments each of which can receive a cassette and incorporates a slidable locking member (2). The locking member moves from a retracted position in a recess (4) in the sleeve, to a locking position in which it engages the cassette by means of a pair of hubs (23) as the cassette is inserted, and returns to the retracted position when the cassette is with-
4 citations
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03 Apr 2012TL;DR: In this paper, the authors developed analytical and graphical methodologies to identify the optimal FFI interval for extension of the discard life of aircraft components, considering repairable components which are periodically tested.
Abstract: In the aviation industry, it may be necessary to employ a combination of Failure Finding Inspection (FFI) and a scheduled discard task at a specific threshold, when a component is aging and its failures are hidden and exert a “safety effect”. This is to ensure an adequate level of availability of hidden functions, and to reduce the risk of multiple failures to an acceptable level. However, in some situations, operators prefer to extend the discard life of components beyond their recommended life limit, due to operational needs or logistic issues. This necessitates the definition of an optimal Failure Finding Inspection interval for the extended life period. The main purpose of this paper is to develop analytical and graphical methodologies to identify the optimal FFI interval for extension of the discard life of aircraft components. The paper considers repairable components which are periodically tested. The methodology assumes that the inspection and repair actions lead to as-bad-as-old (ABAO) reliability characteristics. The graphical approach proposed in this paper considers inspection and repair times, as well as the costs associated with accidents, inspection, and repair, and it takes into account the opportunity losses due to the maintenance downtime. The analytical approach for calculating the unavailability of the hidden function is based on the Mean Fractional Dead Time (MFDT).
4 citations
Authors
Showing all 760 results
Name | H-index | Papers | Citations |
---|---|---|---|
Christer Larsson | 64 | 272 | 12916 |
Björn Johansson | 62 | 637 | 16030 |
David C. Viano | 48 | 232 | 8283 |
Thomas Schiex | 47 | 138 | 11031 |
Robin Hanson | 28 | 114 | 3519 |
Per Lötstedt | 28 | 109 | 2960 |
Brigitte Mangin | 26 | 48 | 2652 |
Lars Hanson | 19 | 117 | 1138 |
Carl Gustafson | 17 | 34 | 1035 |
Magnus Carlsson | 16 | 37 | 808 |
Per-Johan Nordlund | 14 | 26 | 2738 |
David Allouche | 14 | 26 | 680 |
Mark A. Saab | 13 | 16 | 1153 |
Andreas Gällström | 13 | 34 | 402 |
Hans Hellsten | 12 | 37 | 549 |