Mathematical Characterization of Twisted Yarn

Twist leads to yarn torsion,which influences the physical and mechanical properties of yarn or fabric directly.In this paper,according to the basic principle of space geometry,the space geometric model of yarn was established,then the linking number,twisting number,and writhing number of elastic rod model were defined.The reason of yarn snarling was analyzed based on the energy,and the relation between yarn snarling and yarn torsion was studied according to White formula.The results show when tow ends of yarn are fixed,the linking number is constant,which means the sum of twisting number and writhing number for yarn torsion deformation and bend deformation is constant.     

基于纤维成分分析的消费品反欺诈检测关键技术研究

文章从研究特种动物纤维和新型功能纤维入手,系统分析了6种特种动物纤维DNA基因序列、毛发结构,以及10种新型功能纤维的外观形态、化学性能等特征,研发了一系列相关纤维产品的精确定性定量检测方法,建立了相关检测方法标准,为保护消费者权益、纺织服装检验监管提供了重要技术支撑。