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Two analytical procedures (Crank’s method and Dincer’s method) for porous solid materials were reevaluated and used to determine moisture diffusion coefficients and moisture transfer coefficients for larch lumber subjected to drying. A diffusion-like equation was used to describe drying process data. The lumber was idealized in the modeling as infinite(More)
Needle fir (Abies nephrolepis) wood was surface densified at two compression ratios (16.1 and 21.7 %), two hot-pressing temperatures (160 and 180 °C) for a pressure holding duration of 10 min. Subsequently, it was thermally treated at two temperatures (180 and 200 °C) for 1 h. The equilibrium moisture content responses and radial swelling strain ratios were(More)
In this paper, we introduce one efficient Power-to-Amplitude Transformation (PAT) technique based on the Finite-Difference Time-Domain (FDTD) method for the electromagnetic simulation of the guide-wave system. Due to the time-domain characteristic, FDTD method is one of the most popular numerical EM methods to analyze the guide-wave problem excited by(More)
The detection and analysis of drying-induced stresses in wood are of fundamental importance for quality evaluation and grading of kiln-dried lumber, and thus, various such procedures have been developed commercially. In this paper, a softwood drying-induced stress evaluation concept was proposed that is based on the drying rheology and wood mechano-sorptive(More)
Hydrothermal–mechanical (HTM) treatment is a combined action of temperature, moisture, and mechanical loads. Various kinds of HTM processes have been developed to produce eco-friendly modified wood products. Among these modification technologies, a combination of surface densification and hydrothermal post-treatment is a promising option that can be used to(More)
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