weak extension

Thermal fatigue test shows that it is weak in crack extension resistances.

热疲劳试验显示，材料的抗热疲劳性能较差；

In this paper, a weak semi-ring is defined, and the Carath é odory theorem about extension of measure is generalized.

提出了一个新的概念弱半环，并推广了Carath啨odory的测度扩张定理。

Electromagnetic wave reflection coefficients are calculated out by separate selection variable of gap dimension, clearance, cell period and medium electricity parameter ε? μ, variation specialties are discussed, and the conclusions of frequency selection property indistinctively, wave reflection weak and frequency range extension etc are got.

通过开口尺寸、间隙、单元周期及介质电参数ε、μ的变化，计算了电磁波的反射，讨论了变化的特性，得出这种结构具有弱的频率选择性、波反射减弱和频带展宽等结论。

In this paper, a brief review of the theory of the measure extension is given in the first, then a new concept& weak semi-ring is introduced, and the measure extension on it is followed, which has generalized the Caratheodory measure extension theorem.

本文首先对测度扩张的理论做了一个简单总结，然后引进了一个新集类&弱半环，给出了其上的测度扩张定理，它推广了Caratheodory测度扩张定理。

All of the patients were followed up from eight months to two years and showed a range over 100 degree without weak extension and lameness.

术后随访8个月至2年，患肢活动范围100度以上，效果满意，无肌力减退、无跛行。