对型材剪切的传统工艺进行了改进，采用一副剪切模，介绍了该模具的结构特点及工作过程。
Improved the traditional process of the section material cutting, designed a cutting die. Introduced the structure characteristics and working process of the die.
介绍了用在冲床上的一种双件精密剪切模的结构、工作过程和设计制造要点，并给出了实用的模具结构。
The structure, process of work, essential of design and making of one kind of precision cutting die for two-piece on punch press were introduced. Then a practical die structure was given.
经典成核理论假设气泡核的形成是在静态条件下发生的，它没有反映在口模流场中动态因素(拉伸、剪切等)对气泡成核的影响。
Because classical nucleation theory supposes that bubble formation is occurred under static state, it doesn't reflect the effects of dynamic factors on bubble nucleation, such as shear and elongation.
采用打靶法，数值求解了在负磁剪切托卡马克等离子体中离子温度梯度驱动的复本征模方程。
An eigenmode equation of ion temperature gradient driven instability in a tokamak plasma with negative magnetic shear is solved numerically by the shooting method.
用积分本征模方程研究了在托卡马克等离子体中包含全部动力学效应的动力剪切阿尔芬波模（无论是否存在温度梯度） 。
Kinetic shear Alfvn modes in tokamak plasmas (with or without temperature gradient) in the full gyrokinetic limit are numerically investigated by using the integral eigenvalue equations.
根据MHD气球模稳定性理论，计算了负磁剪切位形中等离子体气球边缘稳定性区域。
Based on MHD ballooning mode stability theory, marginal stability regions of the plasma ballooning mode in negative magnetic shear configuration are calculated in this paper.
实验结果表明，使用性能良好的锭模耐火涂料在低剪切条件下，应具有较大的表现粘度与屈服应力，以及较小的塑性粘度和适当的触变性。
The results show that the coatings with good application properties have larger apparent viscosity , higher yield stress , lower plastic viscosity and proper thixotropy at lower shear rate.
适当增加流道的长度，可以减小胶料出口处的速度场、剪切速率场的集中程度并使之趋于均匀，能够有效降低挤出胀大和模外熔体偏转流动现象。
The velocity field and shear rate distribution are reduced and uniform along with the proper increase of slip length. The die swell and the interface deflexion phenomenon will be reduced effectively.
研究了PVC材料通过矩形口模挤出时，口模的几何参数和剪切速率对离模膨胀的影响，并从理论上分析了其特征规律。
The effects of geometrical parameters of die and shear rates on the die swell of PVC extruded through rectangular die were discussed, and the special rules were also analyses theoretically.
平锻机上的凸、凹模，铜合金挤压模，镶块，高温工作下的热剪切刀。
Tools for forge machine, die insert, extrusion mould for Cu alloy, hot shearing knives.
入口截面不消耗剪切功率，然后用上界定理与曲面积分方法首次得到了用余弦模拉拔方棒时变形力的解析解。
Then with the upper-bound theorem and the surface integral an analytical solution of the drawing stress was first obtained.
这些影响因素使得口模出口处压力、法向速度和剪切速率均不为零，从而引发离模膨胀等问题。
These factors make the die exit pressure, normal velocity and shear rate not to be zero, thus lead to problems including die swell and etc.
采用非模方法，得到了扰动量的剪切傅里叶谐波分量随时间演化的方程组，并对方程组进行了数值分析。
Using the Nonmodal approach, the temporal evolution equations with Spatial Fourier Harmonics for the disturbed quantities are obtained, and have been studied numerically.
采用非模方法，得到了扰动量的剪切傅里叶谐波分量随时间演化的方程组，并对方程组进行了数值分析。
Using the Nonmodal approach, the temporal evolution equations with Spatial Fourier Harmonics for the disturbed quantities are obtained, and have been studied numerically.
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