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1·Many papers also focused on qualitative models with simple returns and provided forecasting for the rates of return.

许多论文还注重研究简易回收的定性模型，并提供回收率的预测方法。

2·There are two approaches to HR forecasting: quantitative and qualitative.

有两种人力资源预测的方法：定量分析法和定性分析法。

3·The improvement method presented in this paper provides a flexible means to deal with the qualitative fuzzy factors in load forecasting.

文中的改进方法为处理预测中的定性模糊因素提供了一种灵活的手段。