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Highly reactive polyols were prepared from modified acetic acid lignin (AAL) by a two‐step combination of mild hydrothermal degradation and hydroxylation. The AAL‐based polyols became relatively reactive and compatible with diisocyanate, with a reduction in the number average molecular weight (Mn) from 2923 to 684 g/mol and an increase in the hydroxyl content from 5.21 to 9.13 mmol/g. The mechanical...
This paper examines the mechanism of an enzyme pre-treatment on mechanical preparation of microfibrillated cellulose (MFC), the effects of hemicellulase and cellulase, on enhancing of the PFI refining efficiency of Northern Bleached Softwood Kraft pulp for fiber’s devillicate, and changing of morphologies and physical characteristics on fibers, such as specific surface area were investigated, respectively...
The theory of Chinese character intelligent formation considers that Chinese characters are formed by components according to character structure; all the components are the topological mapping of basic elements in the character structure. The mapping method of basic elements in different character structures is one of the key technologies. This paper carried on a thorough analysis to the transformation...
In the system of Chinese character intelligent formation, the same basic element may have different position, size and shape in different Chinese characters. The transformation from basic elements to Chinese characters can be realized by affine transformation (AT), and a novel approach was proposed to acquire the AT coefficients of basic elements. The coefficients of linear transformation are taken...
In this paper, we have analyzed the mechanism of human beingpsilas cognition of the Chinese character from the perception theory of cognitive psychology, likening the computer to the human brain, proposed that the theory of Chinese character intelligent formation without character library. The systemic structure of Chinese character intelligent formation was designed which composed by knowledge library,...
In the Chinese character intelligent formation, the same basic element has different position, size and shape in different Chinese characters. The transformation from the basic element to the Chinese character can be realized by affine transformation, and a novel approach was proposed to acquire the transformation coefficients of basic elements. The interested region was determined based on the structure...
Knowledge representation is one of the key technologies in the Chinese character (CC) intelligent formation system. The mechanism of human cognition of CC in term of perception and memory in cognitive psychology was expounded, the formal representation of CC was built, and the representation of CC knowledge with semantic network was proposed. 6763 CCs in the National standard GB2312-80 set are taken...
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