By a News Reporter-Staff News Editor at Journal of Engineering -- Investigators publish new report on Safety Engineering. According to news reporting originating in College Park, Maryland, by VerticalNews journalists, research stated, "Degradation signals that reflect a system's health state are important for diagnostics and health management of complex systems. However, degradation signals are often compounded and contaminated by measurement errors, making data analysis a difficult task."
The news reporters obtained a quote from the research from the University of Maryland, "Motivated by the wear problem of magnetic heads used in hard disk drives (HDDs), this paper investigates Wiener processes with measurement errors. We explore the traditional Wiener process with positive drifts compounded with i.i.d. Gaussian noises, and improve its estimation efficiency compared with the existing inference procedure. Furthermore, to capture the possible heterogeneity in a population, we develop a mixed effects model with measurement errors. Statistical inferences of this model are discussed. The mixed effects model subsumes several existing Wiener processes as its limiting cases, and thus it is useful for suggesting an appropriate Wiener process model for a specific dataset."
According to the news reporters, the research concluded: "The developed methodologies are then applied to the wear problem of magnetic heads of HDDs, and a light intensity degradation problem of light-emitting diodes."
For more information on this research see: Degradation Data Analysis Using Wiener Processes With Measurement Errors. IEEE Transactions on Reliability, 2013;62(4):772-780. IEEE Transactions on Reliability can be contacted at: Ieee-Inst Electrical Electronics Engineers Inc, 445 Hoes Lane, Piscataway, NJ 08855-4141, USA. (Institute of Electrical and Electronics Engineers - www.ieee.org/; IEEE Transactions on Reliability - ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=24)
Our news correspondents report that additional information may be obtained by contacting Z.S. Ye, University of Maryland, CALCE, College Park, MD 20742, United States. Additional authors for this research include Y. Wang, K.L. Tsui and M. Pecht.
Keywords for this news article include: Maryland, College Park, United States, Safety Engineering, North and Central America
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