茧丝纤度曲线函数模型的构建与分析

Construction and analysis of cocoon filament size curve function model

构建合理的茧丝纤度曲线描述模型是开展蚕品种选育、缫丝工艺制定和计算机模拟缫丝的重要基础。文章在分析了茧丝纤度曲线形态特征的基础上,将茧丝纤度曲线呈"细-粗-细,最末处最细"的特征归咎于蚕吐丝时吐丝口逐渐张开和绢丝液或吐丝力持续减弱的综合结果,提出采用Logistic函数和二次函数的复合函数来模拟茧丝纤度曲线。经非线性回归分析和模拟生成验证,确认该复合函数模型具有良好的适用性,有望成为新的茧丝纤度曲线描述和模拟生成方案。

The rational description model of cocoon filament size curves is an important foundation for silkworm varieties breeding,silk reeling process and computer simulation of silk reeling.Based on the analysis of morphological characteristics of cocoon filament size curves,the characteristics of“fine-thick-fine,the finest at the end”of the cocoon filament size curves were attributed to the composite results that the silkworm spinning mouth opened gradually and spun silk liquid or spinning force decreased continually.Besides,the compound function of Logistic function and quadratic function was applied to simulate the cocoon filament size curve.By means of nonlinear regression analysis and simulation,it is believed that the compound function model has good practicability,and it is expected to become a new generating scheme of cocoon filament size curve description and simulation.