Pulsed-jet cleaning is recognized as the most efficient method to regenerate bag dust collectors traditionally used in industrial processes to control the emission of particulates.In this study,non-woven needle felt f...Pulsed-jet cleaning is recognized as the most efficient method to regenerate bag dust collectors traditionally used in industrial processes to control the emission of particulates.In this study,non-woven needle felt filter bags with and without a film coating material have been analyzed considering different geometries(different number N of pairs of pleated filter bag sides)in the frame of dedicated low-pressure pulsed-jet cleaning experiments.The flow structure inside the bag and the response characteristics of its wall have also been analyzed numerically through a computational fluid-dynamics/structural-dynamics(CFD-CSD)unidirectional fluid-solid coupling method.As shown by the experiments,the peak pressure(P_(0))on the wall of the filter bag with N=8 and 12 is higher,which indicates dust can be removed more effectively in these cases.The peak pressure on the wall increases first and then decreases along the direction of the bag length,while the peak pressure of the pleated filter bag with nonwoven needled felt film coating is greater than that without film coating.A comprehensive analysis of the time variation of acceleration,deformation,strain,stress and other factors,has led to the conclusion that the pleated filter bag with N=12 would be the optimal choice.展开更多
Pleated Skirts,an ethnic folk original picture book on Batik,creating intricate patterns on the fabric of Miao costumes with traditional dyeing techniques,this book has woven the intangible cultural heritage of Miao e...Pleated Skirts,an ethnic folk original picture book on Batik,creating intricate patterns on the fabric of Miao costumes with traditional dyeing techniques,this book has woven the intangible cultural heritage of Miao ethnic groups into a lively and interesting fairy tale,presenting young readers with a beautiful world full of folk wisdom,not only boasting boundless imagination but also aligning with traditional cultural values,promoting good and punishing evil,and emphasizing unity and mutual assistance.Adopting Miao batik as the illustration style,the unique blue and white colors and simple painting designs have fully embodied the Miao essence,especially the Danzhai batik,with the features of secondary dyeing popular in the region of west Guizhou Province,enriching the expressiveness of the picture.Additionally,the beauty of lines and blank space in traditional Chinese painting in such a book improves the children's perception of ethnic traditional art and cultivates their diverse acsthetic abilities.Thus,it is of great academic value and practical significance to study the profound connotation of the Miao traditional culture.展开更多
In this study, the three-dimensional physical model of pleated air filtration media was simplified to porous media model, and the calculation parameters of porous media were obtained based on experimental data. The mo...In this study, the three-dimensional physical model of pleated air filtration media was simplified to porous media model, and the calculation parameters of porous media were obtained based on experimental data. The model of V-shaped pleated air filter media is constructed, the height of the media pleat is 50 mm and the pleat thickness is 4 mm, the pleat angle is 3.7°. The Hertz-Mindlin contact model was modified by Johnson Kendall Roberts (JKR) adhesion contact model. The deposition process of particles in media was simulated based on computational fluid dynamics (CFD) theory and discrete element method (DEM). Results show that the CFD–DEM coupling method can be effectively applied to the macro research of pleated air filter media. The particles will form dust layer and dendrite structure on the fiber surface, and the dust layer will affect the subsequent air flow organization, and the dendrite structure will eventually form a “particle wall”. The formation of the “particle wall” will prevent the particles from moving further in the fluid domain, which makes area of pleated angle become the “low efficiency” part about the particle deposition. Compared with area of pleated angle, the particles are concentrated in the opening area and the middle area of the pleated to agglomerate and deposit.展开更多
为系统梳理国内外服装褶皱研究的演进脉络与前沿趋势,选取2005—2024年中国知网(CNKI)数据库的363篇中文文献以及Web of Science(WOS)数据库的580篇英文文献,采用CiteSpace可视化分析方法制作研究图谱。结果表明:中国科学院和东华大学...为系统梳理国内外服装褶皱研究的演进脉络与前沿趋势,选取2005—2024年中国知网(CNKI)数据库的363篇中文文献以及Web of Science(WOS)数据库的580篇英文文献,采用CiteSpace可视化分析方法制作研究图谱。结果表明:中国科学院和东华大学在服装褶皱国际学术交流中发挥重要桥梁作用;国内服装褶皱研究可分为起步萌芽期、迅速成长期、拓展期三个阶段,国际服装褶皱研究可划分为探索期、爆发期、深化期三个阶段;研究热点涵盖“服装造型与设计方法”“面料工艺与结构优化”“视觉表现与智能设计”及“经典品牌与风格”四个主题。未来服装褶皱将向功能化、文化融合与科技创新三大方向发展,呈现多学科交叉融合的特征。研究结果可为服装褶皱研究创新与跨领域融合提供理论依据与方法支撑。展开更多
基金This study was financially supported by Anhui Provincial Scientific and Technological Major Project(Grant No.18030801109).
文摘Pulsed-jet cleaning is recognized as the most efficient method to regenerate bag dust collectors traditionally used in industrial processes to control the emission of particulates.In this study,non-woven needle felt filter bags with and without a film coating material have been analyzed considering different geometries(different number N of pairs of pleated filter bag sides)in the frame of dedicated low-pressure pulsed-jet cleaning experiments.The flow structure inside the bag and the response characteristics of its wall have also been analyzed numerically through a computational fluid-dynamics/structural-dynamics(CFD-CSD)unidirectional fluid-solid coupling method.As shown by the experiments,the peak pressure(P_(0))on the wall of the filter bag with N=8 and 12 is higher,which indicates dust can be removed more effectively in these cases.The peak pressure on the wall increases first and then decreases along the direction of the bag length,while the peak pressure of the pleated filter bag with nonwoven needled felt film coating is greater than that without film coating.A comprehensive analysis of the time variation of acceleration,deformation,strain,stress and other factors,has led to the conclusion that the pleated filter bag with N=12 would be the optimal choice.
文摘Pleated Skirts,an ethnic folk original picture book on Batik,creating intricate patterns on the fabric of Miao costumes with traditional dyeing techniques,this book has woven the intangible cultural heritage of Miao ethnic groups into a lively and interesting fairy tale,presenting young readers with a beautiful world full of folk wisdom,not only boasting boundless imagination but also aligning with traditional cultural values,promoting good and punishing evil,and emphasizing unity and mutual assistance.Adopting Miao batik as the illustration style,the unique blue and white colors and simple painting designs have fully embodied the Miao essence,especially the Danzhai batik,with the features of secondary dyeing popular in the region of west Guizhou Province,enriching the expressiveness of the picture.Additionally,the beauty of lines and blank space in traditional Chinese painting in such a book improves the children's perception of ethnic traditional art and cultivates their diverse acsthetic abilities.Thus,it is of great academic value and practical significance to study the profound connotation of the Miao traditional culture.
文摘In this study, the three-dimensional physical model of pleated air filtration media was simplified to porous media model, and the calculation parameters of porous media were obtained based on experimental data. The model of V-shaped pleated air filter media is constructed, the height of the media pleat is 50 mm and the pleat thickness is 4 mm, the pleat angle is 3.7°. The Hertz-Mindlin contact model was modified by Johnson Kendall Roberts (JKR) adhesion contact model. The deposition process of particles in media was simulated based on computational fluid dynamics (CFD) theory and discrete element method (DEM). Results show that the CFD–DEM coupling method can be effectively applied to the macro research of pleated air filter media. The particles will form dust layer and dendrite structure on the fiber surface, and the dust layer will affect the subsequent air flow organization, and the dendrite structure will eventually form a “particle wall”. The formation of the “particle wall” will prevent the particles from moving further in the fluid domain, which makes area of pleated angle become the “low efficiency” part about the particle deposition. Compared with area of pleated angle, the particles are concentrated in the opening area and the middle area of the pleated to agglomerate and deposit.
文摘为系统梳理国内外服装褶皱研究的演进脉络与前沿趋势,选取2005—2024年中国知网(CNKI)数据库的363篇中文文献以及Web of Science(WOS)数据库的580篇英文文献,采用CiteSpace可视化分析方法制作研究图谱。结果表明:中国科学院和东华大学在服装褶皱国际学术交流中发挥重要桥梁作用;国内服装褶皱研究可分为起步萌芽期、迅速成长期、拓展期三个阶段,国际服装褶皱研究可划分为探索期、爆发期、深化期三个阶段;研究热点涵盖“服装造型与设计方法”“面料工艺与结构优化”“视觉表现与智能设计”及“经典品牌与风格”四个主题。未来服装褶皱将向功能化、文化融合与科技创新三大方向发展,呈现多学科交叉融合的特征。研究结果可为服装褶皱研究创新与跨领域融合提供理论依据与方法支撑。
