Two-stage multiple imputation with a longitudinal composite variable
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DOI: 10.1186/s12874-025-02555-9
Abstract: Missing data are common in longitudinal studies. Multiple imputation (MI) is widely used to handle missing data. However, most of the MI methods assume various missing data types as missing at random (MAR) in imputation.… read more here.
Keywords: multiple imputation; stage; missing data; composite variable ... See more keywords
Analysis of Cutting Stability of a Composite Variable-Section Boring Bar with a Large Length-to-Diameter Ratio Considering Internal Damping
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DOI: 10.3390/ma15155465
Abstract: Chattering in composite deep-hole boring can directly affect surface processing quality and efficiency and has always been a research hotspot in machining mechanics. In this study, based on Euler–Bernoulli beam theory, the fine control equations… read more here.
Keywords: composite variable; section boring; variable section; ratio ... See more keywords