On the basis of freeboard phenomenon in curve way and the improvement of curve flow velocity, this paper gets a useful calculating method of bed roughness.
本文基于弯道超高现象以及弯道流速计算的改进，得出了一种较为实用的泥石流沟床糙率计算方法。
The design method of damping spring in vibration hammer is developed in this paper. Espacially a selecting range is introduced for calculating damping parameter, which is useful in design.
介绍了振动锤隔振弹簧设计方法给出了隔振参数计算必要的取值范围，可供实际设计参考。
A useful method for calculating RCS of complex objects is given.
提出一种计算复杂目标高频区rcs的实用方法。
We conclude that FCM is an accurate, reliable and very useful method for calculating mitral regurgitation stroke volume.
认为血流会聚法是一种准确、可靠且实用的二尖瓣返流量计算方法。
In this paper the authors give a kind of useful method that the structure of tree is applied in calculating permutation Sn, mapping YZ and permanent per(A) and designing high-efficient computer cam.
利用树的结构给出了X到Y的映射YZ，Sn以及矩阵积和式per（A）的一种计算方法和高效率计算机鼓轮的设计方法。
In this paper the authors give a kind of useful method that the structure of tree is applied in calculating permutation Sn, mapping YZ and permanent per(A) and designing high-efficient computer cam.
利用树的结构给出了X到Y的映射YZ，Sn以及矩阵积和式per（A）的一种计算方法和高效率计算机鼓轮的设计方法。
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