The method of limit is proposed for establishing the sufficient conditions for determining the direction in a ventilation network. The composite determinative method of res…
提出了用极限方法确定判别某些网路风流方向的充分条件，并对现有的井巷风阻复合判别法和节点位势法进行了分析和探讨。
The engineering signification for the best slope Angle is remarked in this paper. In view of factors of engineering technique and cost, the determinative method of the best slope Angle is provided.
作者阐述了设计最优坡角的工程意义，并通过工程技术与成本诸要素分析，提出了最优坡角的确定方法。
DNA takes determinative effect in the process of various life activity, it is very important for the science research and society progress to seek for a fast method of DNA detection.
DNA在许多生命现象和生命过程中起着决定性的作用，因此寻求快速检测dna的方法具有重要的社会意义。
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