1) unstable continuity velocity field
非稳态连续速度场
1.
Through analysis of its forming characteristic, unstable continuity velocity field is established.
给出了深小锥孔件开式冷挤压成形时极限变形程度的定义,通过对深小锥孔开式冷挤压成形时的变形分析,建立了变形区非稳态连续速度场,利用上限原理得到了极限变形程度的理论判据。
2.
, unstable continuity velocity field is established.
通过分析深小锥孔开式冷挤压成形特点 ,描述了其成形极限 ,建立了变形区非稳态连续速度场 ;利用上限原理得到了成形极限的理论模型。
3.
In the paper, the forming limit was depicted by analysis of the deep tine taper hole formed by open-die extrusion, and meanwhile unstable continuity velocity field was established.
建立了变形区非稳态连续速度场;利用上限原理得到了成形极限的理论判据。
2) varying velocity field
非稳态速度场
1.
The based on the concepts of hydrodynamics and field theory the varying velocity field of open-die cold extrusion of deep thin cone-hole is build and the mathematical relations between deformation power and the princial parameters is established by upper-bound method.
运用场论及流体动力学的理论,建立了深小锥孔开式冷挤压的非稳态速度场,运用上限法建立了变形功率和各主要参数间的函数关系。
3) continuous velocity field
连续速度场
1.
A kinematically admissible continuous velocity field to the plane strain extru sion is established in cartesian coordinates, and an upper - bound analytical solution is thus obtained in this paper.
本文采用直角坐标系建立了平面变形挤压问题的运动学许可连续速度场并获得了该问题的上解析限解。
2.
A kinematically admissible continuous velocity field is established and applied to the plane strain in reversible extrusion.
对平面变形的正反向挤压问题建立运动许可的连续速度场并获得上界解析解。
3.
A kinematically admissible continuous velocity field is established and applied to the plane strain due to drawing, and the upper-bound analytical solution is obtained.
与Avitzur以柱坐标系的连续速度场得到的上限解相对比,当压下率ε<70％时,本文解法可得到更低的上限值。
4) continuous function velocity field
连续函数速度场
5) noncontinuous velocity function
非连续速度函数
6) unstable temperature field
非稳态温度场
1.
Numerical simulation of unstable temperature field during modeling of SMC;
SMC模压过程非稳态温度场数值模拟
2.
In order to carry out a numerical simulation of the unstable temperature field and curing degree in the pultrusion process of GFRP,a mathematical model was established for the variation of temperature distribution and curing degree on the basis of curing kinetic and unstable thermal conduction theories.
为了对GFRP(玻璃纤维增强塑料)拉挤成型非稳态温度场与固化度进行数值模拟,依据固化动力学和非稳态导热理论,建立了温度场和固化度动力学模型。
3.
A finite element model concerning unstable temperature field for TCVI process was proposed to overcome this problem, and the distribution curves of the temperature field change during the whole infiltration process were given out by numerical simulation.
针对C/C复合材料热梯度化学气相渗透工艺(TCVI)致密化过程温度场难以用解析法求解的问题,建立了TCVI过程非稳态温度场有限元模型,给出了该过程温度场变化的分布曲线,研究了温度场变化规律及致密化效率与沉积温度的关系,数值模拟结果与实验结果吻合较好,为提高TCVI工艺致密化效率提供了理论指导。
补充资料：连续和非连续孔径射电望远镜
射电望远镜因接收天体射电的天线孔径的构成方式不同，而有连续孔径和非连续孔径之分。连续孔径射电望远镜是射电望远镜的一种最简单的类型，其天线孔径为接收单元所布满，因而天线增益和分辨率全由天线孔径的实际尺寸和形状决定。这类望远镜天线孔径可以有各种形状，如通常的抛物面、球面、抛物柱面、抛物带形反射面等。某些由分立天线（如偶极子天线、裂缝波导等）组成的天线阵，当阵元间距不大于半波长时，由于电场强度方向图和连续面电流分布的场强方向图相似，也被认为是连续孔径射电望远镜。这种情况更常见于线孔径或米波、十米波段的偶极子阵。非连续孔径射电望远镜是天线结构只分布在孔径部分面积内的望远镜，通常由多个天线组成。栅式干涉仪、复合射电干涉仪、栅十字、 T形栅、圆阵、圆环以及综合孔径射电望远镜等都是。这种望远镜的分辨率由天线范围（设想的孔径）的外尺寸决定，而总的天线增益或灵敏度，则取决于全部天线单元面积的总和。图中a所示的连续孔径天线可认为由N个单元面积组成,经天线传至接收机的信号是各单元反射信号的迭加，连续孔径射电望远镜通过焦点处的馈源自动得到这种迭加。由于二单元A、B信号的迭加效果等效于处在A、B的相关干涉仪输出，非连续孔径射电望远镜正是基于这个原理，在省去孔径一部分的情况下,保留连续孔径各单元间的全部间距和取向，如图中b所示的"骨架式"射电望远镜，或者依观测需要对这些间距和取向进行有限的采样（各种干涉阵），甚至用不少于2的有限天线依次采样后进行处理；图中c是综合孔径望远镜。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条