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Trichromatic Dyeing of Polyimide Fiber Using Its Inherent Color as a Yellow Component
Dongyan Shao,Changhai Xu,Jinmei Du,Hongbo Wang 한국섬유공학회 2020 Fibers and polymers Vol.21 No.8
Polyimide (PI) fiber is one kind of high-performance fibers with outstanding thermal stability, mechanicalproperties, and chemical resistance, but it is difficult to be dyed due to its tightly packed macromolecules and lack offunctional groups for dyeing. Especially, the inherent yellow shade of PI fiber limits the color gamut that can be matched bytrichromatic dyeing. In this study, it is proposed to investigate the possibility to dye PI fibers into a black shade with dispersedyes and basic dyes with the assistance of swelling agents. The dyeing experiments showed that, among the proposedswelling agents, N-methyformanilide (MFA) was the preferred candidate for enhancing the dyeing ability of PI fibers. Usingthe inherent yellow color of PI fiber as a yellow component in trichromatic dyeing it could be dyed into a black shade withgood colorfastness to washing, rubbing, and dry-heating. In spite of causing a slight decrease in tensile strength the dyeingwould not impair the thermal stability of PI fibers.
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Research on Online Sports Metadata Extraction System based on Video Processing Technology
Haixin Yao,Jinmei Shao 보안공학연구지원센터 2016 International Journal of Database Theory and Appli Vol.9 No.12
ports video metadata extraction system based on the content of basic goal use an automated or semi-automated interactive means to obtain video data as complete features and attributes for efficient retrieval mechanism. For fast access to video information needed, sports video ornamental create conditions. Firstly, video-based layered metadata description model, we discuss the structure of the video processing technology, and an increase in the time domain and airspace video object motion information on this basis. Low-level visual features for video and high-level semantic features presents a particular field of video information for video implicit hierarchical division method. Video automated visual feature extraction, semantic feature places marked attracted achieve human-computer interaction. Focus on the sports information descriptors and visual content descriptors, descriptor structure video. Video data based on hierarchical structure model and video features standard video content description model.
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