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设A表示在单位圆盘D={z:|z|1}内解析且满足f(0)=f′(0)-1=0的函数类.首先,引入了与贝努利双纽线有关且具有共轭点的广义解析函数类SL~*_c(α,μ):■然后,讨论了此类函数的三阶Hankel行列式H_3(1),得到其上界估计. 相似文献
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魏新平 《甘肃农业大学学报》1993,28(4):395-399
本文根据水力学伯努力方程及牛顿公式,提出了梯形断面明渠非均匀渐变流水面线计算的数值方法,给出了迭代过程收敛的初值选择条件及计算实例。 相似文献
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Wang Hongen Li Jin 《保鲜与加工》1988,(4)
In this paper, dynamic analyses are made for (he pump and energy-store hydrauic system in a 3150 ton tube and form-bur press machine. The formulas for calculation are derived, and the so are the relationship between the press and the displacement, and the velocity and the acceleration. Numerical calculations are also made. The calculated results coincide with the measured data. The method in this paper has a universal reference meaning for all types of press machines with the type pump and energy-store hydraulic system. 相似文献
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