The effect of proof testing on the fatigue strength of ceramic specimens is analyzed by means of the fracture mechanics approach.

应用断裂力学理论分析了保证试验对陶瓷试件造成的损伤及其对疲劳强度的影响。

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Finally, optical fiber lifetime is estimated and the lifetime design picture of optical fiber which passed three-grades proof testing strain is given.

最后，对筛选试验后的光纤寿命进行了估算，给出了光纤经三个等级的筛选应变后的寿命设计图。

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Two kinds of reference techniques for proof testing of optical fiber strength as well as the test methods are briefly presented. Optical fiber strength after proof testing is theoretically, analyzed.

简略介绍了两种光纤强度筛选的基准筛选试验设备及其方法，并从理论上分析了筛选试验后的光纤强度。

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At first, we only saw legitimate researchers testing innocuous proof-of-concepts.

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Ultimately, testing is your final proof.

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At that stage Dr Pusztai's research simply looked like a proof of principle checking that the techniques for transplanting and testing lectin genes worked, prior to exploring other, less harmful lectins as built-in insecticides for crops.

ECONOMIST: Potato-heads