Furan resin and fir powder pretreated by FeCl3 and aqueous ammonia solution were used to fabricate α-Fe/Fe3C/woodceramic nanocomposite. The bands of the pretreated wood powder were characterized by Fourier transform infrared spectroscopy (FTIR). The structural characterization of the nanocomposites was performed by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The microwave absorption of the nanocomposites was measured by a vector network analyzer in the range of 2–18 GHz. The mechanical properties of the composites were also investigated. XRD and SEM results show that the α-Fe and Fe3C nanoparticles are in-situ generated and disperse in the matrix of the woodceramic. The diameters of these nanoparticles increase with the increasing of concentration of FeCl3 solution. The experimental results show that both the complex permittivity and the complex permeability of α-Fe/Fe3C/woodceramic nanocomposites increase as the concentration of FeCl3 solution increases. The composites pretreated with 0.60 mol·L−1 FeCl3 have the best absorption properties. The maximum value of reflection loss (RL) at 3 mm thickness reaches −25.60 dB at 10.16 GHz and the bandwidth below −10 dB is about 2.5 GHz. Compared to woodceramic, the bending strength and compressive strength of α-Fe/Fe3C/woodceramic nanocomposites increase by 22.5% and 18.7% at most, respectively.

No abstract

No abstract

The Chinese verb CHI (吃) can be virtually used with any NP in the language and the numerous papers published on this issue up to now basically focus on metonymy or metaphor interpretations for this phenomenon. In this paper, however, the author first categorizes the CHI + NP construction into ET (extended) and CT (contextualized) types, and then discusses the location dilemma (i. e. ET1 sub-type) and the semantic ubiquity (i. e. CT sub-type) typical of Chinese in order to show that the location dilemma (e. g. CHI immediately followed by a location NP) is neither the consequence of some vacuous syntactic raising nor an economy-driven equivalent of its counterpart longer expression. The ET1 use of CHI connotes an abstract sense of direction. Likewise, the semantic ubiquity (i. e. novel uses of CHI) of the CT category is not blindly metaphorical either but is better understood as the Chinese proclivity for eating and culinary arts projecting onto some pertinent cultural-linguistic fossilization and pragmatic entrenchment. The author believes that the idiosyncratic behavior and the rambunctiousness of the "CHI + NP" construction in terms of its consequent semantic omnipotence of the CT category is a further cognitive extension from the ET2 sense of DEPEND-UPON. Such flexible sense extensions are sanctioned further by the comparatively loose Chinese V + NP combination in general.