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Residual life time estimation is significant for complex systems. In this paper, a method is proposed to estimate the residual life of products on satellite platform by fusing real time updating few failure lifetime and degradation data. The linear Wiener process is adopted to model the degradation data where the drift and diffusion parameters are both(More)
A blend of poly(L-lactide) (PLLA) with star-shaped poly(ɛ-caprolactone-co-L-lactide) (s-PCLA) at different contents (PLLA/s-PCLA=100/0, 90/10, 80/20, and 70/30, w/w) were prepared by torque rheometer. Thermal and functional properties of the blends were investigated by FTIR, SEM, DSC, TGA, DMA, tensile, optical, and water vapor permeability tests. FTIR(More)
The spatial variation of soil pH and soil organic matter (SOM) in the urban area of Xuzhou, China, was investigated in this study. Conventional statistics, geostatistics, and a geographical information system (GIS) were used to produce spatial distribution maps and to provide information about land use types. A total of 172 soil samples were collected based(More)
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