In this paper, we consider single-machine group scheduling with nonperiodical maintenance and deteriorating effects. Nonperiodical maintenance, which has unfixed maintaining interval or the number of jobs in each is unfixed, results a variable groups. Deteriorating effects lead to longer processing times deterioration index depends on job grouping. This problem significance different production...

This paper presents a plausible reformulation and extension to the Bouc-Wen hysteresis model and gives an excellent summary and comparison of various theories of deteriorating constitutive models of hysteresis. A preliminary study on the effect of using overly simple hysteresis models (e.g., the bilinear model) when actual behavior includes strength degradation, stiffness degradation, and/or pi...

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This paper examines a single-stage production system that manufactures multiple products under deteriorating equipment conditions. The machine condition worsens with production, and improves with maintenance. The condition of the process can be in any one of several discrete states, and transitions from state to state follow a semi-Markov process. In many production environments, the quality or...

Diagnostic criteria for hemophagocytic lymphohistiocytosis should be reviewed early in critically ill patients with toxic epidermal necrolysis, multisystem dysfunction, and a deteriorating clinical trajectory.