A critical look at the bathtub curve

Klutke, Georgia-Ann; Kiessler, Peter C.; Wortman, Martin

doi:10.1109/tr.2002.804492

Cited by 266 publications

(131 citation statements)

References 8 publications

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“…Most of the countries have been grouped based on their geographical position and their monthly patterns of rainfall erosivity ( Figure 6). The distribution of the monthly erosivity in the Mediterranean countries (Spain, Portugal, Greece and Cyprus) (Figure 6a) follows a bathtub shaped curve [45], as three periods can be identified. Rainfall erosivity is more or less stable in the period from February to June and then shows a decrease in July and August (second period).…”

Section: Seasonal and Monthly Rainfall Erosivitymentioning

confidence: 98%

Monthly Rainfall Erosivity: Conversion Factors for Different Time Resolutions and Regional Assessments

Panagos

Borrelli

Spinoni

et al. 2016

Water

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As a follow up and an advancement of the recently published Rainfall Erosivity Database at European Scale (REDES) and the respective mean annual R-factor map, the monthly aspect of rainfall erosivity has been added to REDES. Rainfall erosivity is crucial to be considered at a monthly resolution, for the optimization of land management (seasonal variation of vegetation cover and agricultural support practices) as well as natural hazard protection (landslides and flood prediction). We expanded REDES by 140 rainfall stations, thus covering areas where monthly R-factor values were missing (Slovakia, Poland) or former data density was not satisfactory

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Section: Seasonal and Monthly Rainfall Erosivitymentioning

confidence: 98%

Monthly Rainfall Erosivity: Conversion Factors for Different Time Resolutions and Regional Assessments

Panagos

Borrelli

Spinoni

et al. 2016

Water

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“…Similar to combined graph, this graph consists of three parts [21] In studies covering the concept of reliability, the reliability of a system is usually considered independent from time, which for industrial products should be in the warranty period [18]. Failure over time can be shown in three different time periods.…”

Section: Human Reliabilitymentioning

confidence: 99%

“…Similar to combined graph, this graph consists of three parts [21] In recent decades, many definitions have been proposed for the reliability concept. For instance, The Oxford dictionary defines reliability as "the quality of being reliable, that may be relied upon; in which reliance or confidence may be put; trustworthy, safe, sure" [22].…”

Section: Human Reliabilitymentioning

confidence: 99%

A Comparative Reliability Study of Three Fundamental Multilevel Inverters Using Two Different Approaches

2016

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Abstract:The reliability of power electronic devices and components is very important to manufacturers. In recent years, many researchers have conducted reliability assessments of power electronic devices, yet the reliability of numerous circuits used widely has not been evaluated. This paper presents a comprehensive reliability evaluation of fundamental multilevel inverters. The reliability of the multilevel inverters is analyzed by calculating the mean time to failure for each component. The calculation was performed by two methods (approximate and exact) to achieve better comparisons. The approximate method is similar to the parts count method used in MIL-HDBK-217 reliability standard, and the exact method exhibits the parts stress method. In the exact method, due to the direct relationship between component failure and temperature, we used Matlab Simulink to determine power losses in diodes and switches taking into account the temperature factor. The results determined by the approximate method showed that the three-level cascade H-bridge was the most reliable of the inverters considered. Although the exact method validates those results, and shows that cascade H-bridge (CHB) had a longer lifespan, but the calculated values are different. Therefore, using different approaches for evaluating reliability results in different outcomes.

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“…The bathtub curve hazard function [26] As The bathtub curve represents Mean Time To Failure is in phase with constant failure rate that shows the predicted elapsed time between inherent failures of a system during operation [27].…”

Section: Definitions and Functionsmentioning

confidence: 99%

Solving complex maintenance planning optimization problems using stochastic simulation and multi-criteria fuzzy decision making

Tahvili¹,

Österberg²,

Silvestrov³

et al. 2014

AIP Conference Proceedings

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A critical look at the bathtub curve

Cited by 266 publications

References 8 publications

Monthly Rainfall Erosivity: Conversion Factors for Different Time Resolutions and Regional Assessments

Monthly Rainfall Erosivity: Conversion Factors for Different Time Resolutions and Regional Assessments

A Comparative Reliability Study of Three Fundamental Multilevel Inverters Using Two Different Approaches

Solving complex maintenance planning optimization problems using stochastic simulation and multi-criteria fuzzy decision making

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