| 单词 | characteristic curve |
| 释义 | > as lemmascharacteristic curve characteristic curve n. [after French caractéristique, noun (M. Deprez 1881, in Compt. rend. hebd. de l'Acad. des Sci. 92 1153)] (a) Electronics a graph showing the relationship between two related parameters of a device, esp. current and voltage; (b) Photography a graph showing the relationship between the logarithm of an exposure time and the resulting image density. ΘΚΠ the world > relative properties > number > graph or diagram > [noun] > graph > showing specific relationship characteristic1881 characteristic curve1881 time curve1883 luminosity curve1886 hysteresis curve1890 hysteresis loop1892 time-distance1892 solidus1901 power curve1908 log log1910 Russell diagram1922 creep curve1931 power curve1932 Hertzsprung–Russell diagram1939 Petersen graph1947 utility curve1948 tournament graph1959 offset1987 1881 tr. M. Deprez in Minutes Proc. Inst. Civil Engineers 65 449 By taking the quantities of this auxiliary current as abscissæ, and the differences of potential at the terminals of the induced circuit as ordinates, there results the characteristic curve [Fr. la courbe que j'appelle caractéristique]. 1891 F. Hurter & V. C. Driffield in Jrnl. Soc. Chem. Industry 10 100/2 We have shown that for every plate there exists a range of exposures during which the growth of the density is proportional to the logarithm of the exposure... The densities thus obtained, when plotted on a diagram, furnish the 'characteristic curve' of the plate. 1981 J. Monaco How to read Film (rev. ed.) ii. 95 A perfect emulsion would have a characteristic curve which was a straight line. 2000 P. Scherz Pract. Electronics for Inventors iv. 143 The equations..tend to ‘screw up’ when the currents and voltages are not within the bounds provided by the characteristic curves. 2007 M. Hurbis-Cherrier Voice & Vision xiv. 272 The characteristic curve is a graphical representation of the way a particular film stock responds to light. < as lemmas |
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