The other is grey fixed weight cluster method, which is based on the theory of grey system.
另一种是基于灰色系统理论的灰色定权聚类方法。
Taking Qianxi county, Hebei province, for example, we put forward the principles to select influencing factors, then graded, evaluated them and fixed on their weight by grey system analysis.
以河北省迁西县为例，提出了选取生态环境干扰度指标因子的原则，进行了干扰度指标因子的分级及赋值，并应用灰色关联度分析确定指标因子的权重。
Aiming at the doffing system with fixed length and weight was added in DTY machines, and applied it to the polyester filament production.
针对许多原DTY机无定长定重装置的情况，在DTY机上加装定长定重落筒系统，并应用于涤纶长丝生产中。
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