Finite Element Simulation of the Polymeric Liquid Flow in Coat-hanger Die

A three - dimenslonal finite element model is developed to deal with the polymeric liquid flow in coat - hanger die. This model is used to predict the flow behavior of the 2％ CMC/watsr solution in the coat - hanger die with linearly taper manifolds and its validity is experimentally verified quantitatively and qualitatively by using Laser Doppler Velocimetry and Particle Image Velocimetry respectively.     

基于二维傅立叶变换轮廓法的织物表面形态测量研究

提出一种基于交叉光轴投影光栅系统和非移频的二维傅立叶变换轮廓测量方法,结合数字加权滤波和可靠度排序的解调技术,获取织物表面变形后的三维轮廓数据,并给出了几种织物面形测量的实例。     

Theoretical Study of the Peripheral Twist Extent Length in Rotor Spinning

The mathematical model of peripheral twist extent(PTE) length was set up by studying the kinematics anddynamics of the yarn in rotor groove. The value of PTElength was calculated by using numerical method, andthe factors affecting the PTE length were also discussed.The results show that the theoretical predicted value ofPTE length seems to be consistent with the measured val-ue. The yarn linear density and rotor speed have re-markable effects on PTE length. The parameters includ-     

转杯纺杯内纱段剥离点张力的分析

采用功能原理的方法分析转杯纺的杯内自由纱段,对该纱段剥离点张力进行了研究,并讨论了影响剥离点张力的主要因素.     

Textile Texture Modeling Using Random Field Models

Described in the paper is the method to fit autoregressive(AR)random field models and Gausslan Markov ran-dom field(GMRF)models for textile textures.Maxi-mum likelihood(ML)estimation schemes and texturesynthesis for these models are presented.Three types oftypical textile textures are tested using the method andsatisfactory results are achieved.     

纺粘非织造过程气流拉伸机理研究进展

简要叙述了纺粘非织造过程气流拉伸机理研究的进展情况,分析和评价了几种有代表性的数学模型,并对今后的研究方向提出了建议.     

FUZZY DECISION-MAKING OF COMBING ROLLER COVERING FOR SPINNING PURE RAMIE NOIL ROTOR-SPUN YARNS

This paper deals with the types and specifications of combing roller covering for spinning pureramie noil rotor-spun yarns.A handling mode combining Fuzzy Decision-making and FuzzyCluster Analysis has been used for analyzing the experimental results.It is shown that,with regard to the specifications of the sawtooth clothing of the combing rol-ler,large working angle,large tooth pitch,fine tooth shape,short tooth height,smooth finish andgood wearability are of benefit to improving the spinning stability and the spun yarn properties.The pinned combing roller,however,regardless of its complicated process of production,is sug-gested to be preferred for spinning the pure ramie noil rotor-spun yarns.The handling mode used in this work is efficient in improving the reliability and objectivity ofthe conclusions and can be used for solving the similar problems.     

苎麻纯落麻转杯纺分梳元件的研究 第三报 粗号纯落麻纱的实用性分析及其产品开发

苎麻纯落麻转杯纺的系列研究已经得出目前纺制纯落麻转杯纱的最优工艺组合。鉴于目前尚未制订出此类纱线的质量标准,本文借助假想的“纯落麻环锭纱”概念,从成纱质量角度分析,得出最优工艺组合下纺制的粗号纯落麻转杯纱具有一定的实用性;在此基础上,利用所纺制的纯落麻转杯纱,成功地开发试织出5种纯落麻机织物及3种落麻针织物面料。     

基于神经网络的精梳毛纺纱线预测

在分析纺纱原理的基础上，采用人工神经网络建立7个不同的模型，预测精梳毛纺的纱线质量和纺纱性能，分别是纱线不匀、粗细节、断裂强力、强力不匀、断裂伸长和断头率。其中断头率由于其复杂的成因，采用了组合神经网络建模。采用工厂实际生产数据进行验证，前6个指标的预测值与实测值之间的相关系数的平方均超过0．9，断头的预测效果相比而言比较差，但相关系数的平方也超过了0．8，表明人工神经网络技术在精梳毛纺纱线预测方面有很大的应用前景。     

纺织品表面纹理的图像分析方法

回顾了用于纺织品表面纹理的图像分析方法,其中着重介绍了纺织品表面纹理特征的描述方法、分析方法和模式分类方法,并以一些常用纺织品为对象,对这些方法的有效性作了比较。