threshold strength

The behaviour of fatigue crack growth rate da/ dN and threshold of stress strength factor △ K_ ( th) in axle steel is investigated and calculated.

本文对车轴钢材料的疲劳裂纹扩展速率da/dN和应力强度因子门槛值△K（th）的特性进行了试验和计算。

The results show that when the wave vector with parallel to the interface exceeds the damping constant and the field strength exceeds a certain threshold, the population of interfacial optical phonons grows with time.

研究结果表明：当平行于界面的波矢超过衰减常数，场强超过某一阈值时，界面光学声子数随时间指数增加。

In the condition of second order transition, expressions of threshold and saturation field strength are deduced, the relations between the expressions and the parameters of LC cell including anchoring energy are calculated in detail and the tendency is expressed.

在二级转变的条件下导出阈值场强和饱和场强的表达式，详细计算了它们与液晶盒参量包括锚定能参量的关系，得到它们的变化趋势。

The threshold of field strength and the power of laser required in experiment are approximately estimated.

还对场强阈值及所需激光器功率密度进行了估计，同时讨论了可能的应用。

He is so low that he drops on the threshold and has hardly strength of mind to enter.

他的情绪非常低，一到门口就泄了气，几乎无决心进去。

It is pointed that 75 and 200 are the threshold temperatures of elastic modulus and uniaxial compression strength respectively.

指出了75℃200℃别是花岗岩弹性模量和单轴抗压强度的门槛温度.

Xiangzi barely had the strength to step across the threshold of the gate.

祥子几乎没有力量迈出大门坎去.

Stimulate the nerve root, evoked motor evoked potential ( MEP) threshold current strength and motor evoked potential ( MEP) latency and nerve root injury is positively related to, motor evoked potential ( MEP) amplitude and nerve root injury were negatively related. 3.

刺激神经根，诱发运动诱发电位（MEP）的阈电流强度和运动诱发电位（MEP）潜伏时间与神经根损伤程度呈正相关，运动诱发电位（MEP）波幅与神经根损伤程度呈负相关。

This make the threshold strength and the saturation strength calculated under the same mathematic framework.

引进新的变量υ代替指向矢倾角θ，使得阈值磁场和饱和磁场可以在同一数学框架下计算；

The two concepts of deviation threshold and collision strength are used to adjust the exploration and exploitation ability of Catfish-PSO algorithm in order to optimize its performance.

算法中引入偏差阈值和冲撞力度两个概念，来调整种群的探测和开发能力，达到优化算法性能的目的。

The threshold strength of external electric field increases with the increasing pressure, and decreases with the concentration of particles in ER fluids.

阈值电场随外加压力梯度的增加而加大，随颗粒浓度的增加而减小。

The result showed that this material had low turn-on filed strength and threshold field strength, and good field emission properties.

场发射性能测试结果表明，该阴极材料具有很低的开启电场强度和阈值电场强度，并表现出较强的场发射稳定性。

Experimental Research on the Threshold Value of Fatigue Cracking of High Strength Steel

高强度钢的疲劳裂纹门槛值实验研究