Howard J. Feldman, the director of regulatory and scientific affairs at the American Petroleum Institute, noted that the evidence of a causal factor was inconclusive for some ailments.
美国石油研究所负责监管和科学事务的所长霍华德j·费尔德曼指出，证据表明废气对某些疾病的发生并不起决定性作用。
The strength matching factor m has a great influence on the J integral in the vicinity of the crack tip.
焊接接头强度匹配因子m对裂纹尖端的J积分值有很大的影响。
The results show that the j and f factors increase with the fin space and fin length decreasing, and the fin space has more obvious effect on the area of optimization factor.
试验结果表明，新型开窗翅片的翅片间距对表面传热因子和阻力性能影响较为显著。
PAN L J, ZHANG B M, DAI F H. Loss factor of viscoelastic damping composite material under harmonic excitation [J]. Journal of Vibration and Shock, 2008, 27(2): 57-60.
[16]潘利剑，张博明，戴福洪。 简谐激励下共固化复合材料黏弹阻尼结构的损耗因子研究[J]。振动与冲击，2008，27（2）： 57-60。
PAN L J, ZHANG B M, DAI F H. Loss factor of viscoelastic damping composite material under harmonic excitation [J]. Journal of Vibration and Shock, 2008, 27(2): 57-60.
[16]潘利剑，张博明，戴福洪。 简谐激励下共固化复合材料黏弹阻尼结构的损耗因子研究[J]。振动与冲击，2008，27（2）： 57-60。
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