矿井通风系统优化是一个有定性和定量相互结合、相互关联、相互制约的众多因素构成的复杂决策问题。
Mine ventilation system optimization is a decision-making problem about complexity system which is composed of many integrating, interrelating and interdependent quantitative and qualitative factors.
本文阅述了具有专科学历小学教师的知能结构的特征，用定性和定量相结合的方法分析了专科学历小教师的知识和能力的构成要素。
This thesis expounds the characteristics of the knowledge and ability composition of the primary school teachers who have the professional college record of schooling.
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