1、

The radius to thickness ratio.

径厚比的影响。

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2、

The solution is applicable for nozzles with any given contraction ratio n1, expansion ratio n2, and throat wall radius R.

精确解对任意给定的收缩比n1、扩张比n2和喉部壁面曲率半径R都适用。

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3、

The critical Marangoni number climbs with the ratio of height and radius decreasing and the gap width increasing.

临界Ma数随着高径比的减小而增大,随着狭缝宽度的增大而增大。

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4、

For seeking the structural parameters of biggest complete bandgap and the change regularity of the bandgap, the fill ratio, dielectric constant ratio of inner-scatters and outside radius of dielectric ring are changed.

改变其填充率,同时改变介电常数比,以寻找最大完全带隙的结构参数,研究其完全带隙变化规律。

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5、

Average free path of ball movement was directly proportional to ball radius, ball density and cylinder volume and inversely proportional to material mass and charge ratio.

磨球运动的平均自由程与磨球半径、磨球密度、球罐体积成正比,与粉碎物料质量、球料比成反比。

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6、

An optimum combination of forming parameters of expanding-ratio, diameter of sectorial die and corner radius of die rim is concluded from a functional relation between roundness error of cross-section and forming parameters for the process of mechanical expanding of large diameter line pipe in the paper.

针对大直径管线钢管机械扩径工艺,得到了以最终制品形状精度(横断面圆度误差)为优化目标的扩径率、模具直径和模具边缘圆角半径等成形参数的最优组合。

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