Results 211 to 220 of about 557,766 (311)

Multivariate Tests for Comparing Lifetimes of Parallel Systems

open access: yesQuality and Reliability Engineering International, EarlyView.
ABSTRACT Life testing of engineering systems with dependent components requires robust multivariate methods. Parametric approaches depend on restrictive assumptions, limiting their use in complex or unknown lifetime distribution settings. This study evaluates nonparametric methods for comparing parallel system lifetimes under minimal sample ...
Niladri Chakraborty   +2 more
wiley   +1 more source

Optimal Accelerated Life Testing Design Under Constrained Resources Using Double Deep Q‐Learning

open access: yesQuality and Reliability Engineering International, EarlyView.
ABSTRACT Accelerated life tests (ALTs) are essential tools for estimating product reliability under high‐stress conditions, allowing failure data to be collected in reduced timeframes. However, planning effective ALT configurations is a complex task that requires selecting stress levels, test durations, and unit allocations while accounting for limited
Allan Jonathan da Silva   +3 more
wiley   +1 more source

Failure Analysis and Maintenance Planning for Repairable Deteriorating Structural Systems Subject to Imperfect Maintenance

open access: yesQuality and Reliability Engineering International, EarlyView.
ABSTRACT The analysis of a system that deteriorates under imperfect maintenance is essential in reliability engineering. Imperfect maintenance does not fully restore a system to its original condition, leading to complex degradation patterns. Statistical inference techniques allow for precise estimation of degradation parameters, maintenance effects ...
Reza Ahmadi, Mitra Fouladirad
wiley   +1 more source

Cell State Transitions Drive the Evolution of Disease Progression in B-Lymphoblastic Leukemia. [PDF]

open access: yesCancer Res Commun
Gravenmier C   +7 more
europepmc   +1 more source

Risk Times in Mission‐Oriented Systems

open access: yesQuality and Reliability Engineering International, EarlyView.
ABSTRACT This article assesses risk times in mission‐oriented systems with high safety standards. We examine critical times under two safety policies. The first requires that the system's reliability function, known the first failure of the components, must exceed a reliability level throughout the mission.
Antonio Arriaza   +2 more
wiley   +1 more source

Dynamic Event‐Triggered Robust Model Predictive Control for Quadrotor Trajectory Tracking

open access: yesInternational Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT This paper addresses the trajectory tracking problem for a full‐state quadrotor subject to physical model constraints and unknown external disturbances. A robust tube‐based model predictive control (MPC) approach is successfully applied to the system, which is subject to bounded disturbances and hard constraints.
Ali Can Erüst   +2 more
wiley   +1 more source

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