| 单词 | quality factor |
| 释义 | > as lemmasquality factor quality factor n. [originally after German Qualitätszahl (1898 in the passage translated in quot. 1899)] a number indicative of the quality of something; (Electronics and Physics) = Q n. 11. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > resistance > [noun] > reactance > ratio quality factor1899 Q1925 1899 G. C. Henning tr. A. Martens Handbk. Testing Materials I. 345 It has been attempted to establish values..which..furnish standards of utility of the material, and are called quality factors [Ger. Qualitätszahlen], or factors of utility. 1947 Electronic Circuits & Tubes i. 17 The ratio of the series reactance to the series resistance of a reactor is defined as Q, its quality factor. 1971 Nature 24 Dec. 461/1 Recent measurements of the quality factor, Q, for mechanical vibrations generated by dropping parts of the Apollo lunar module and by moonquakes indicate that the Q of the Moon for these vibrations is of the order of 3,000. 1997 R. A. Dentler & A. L. Hafner Hosting Newcomers ii. 29 The Quality of Education scale was developed because of the necessity of including a general educational quality factor that incorporates a broader sense of high standards. < as lemmas |
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