原棉未成熟纤维含量不仅影响梳棉条、精梳条的短绒率、棉结、带纤维籽屑等疵点，而且严重影响成纱的各类主要疵点。
Immature fiber content is not only influence short fiber content, neps, impurities and other defects of card sliver & comb sliver but also influence main defects in yarn forming.
总结出精梳落棉率、精梳棉结、精梳条条干c V值、重量不匀率等质量指标的控制原理及控制方法。
Control principle and methods of quality indexes such as combing waste percentage, combing neps, evenness CV of combing sliver, weight unevenness and so on were summarized.
实践表明：两种模型对毛条的豪特长度、长度变异、短纤维含量和精梳落毛率均能进行较为准确的预测，其中人工神经网络预测模型预测效果优于统计回归模型。
Application experience has been shown that both methods have good prediction performance in which the ANN method has better prediction performance in comparison with multiple regression method.
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