“characteristic curve”的概念、定义、翻译、参考文献-科学参考

单词	characteristic curve
释义	characteristic curve [´kar·ik·tǝ`ris·tik `kǝrv] ^{GRAPHIC ARTS} In photography, a graph that shows how increases in exposure increase the density of the film. ^MATHEMATICS 1. One of a pair of conjugate curves in a surface with the property that the directions of the tangents through any point of the curve are the characteristic directions of the surface. 2. A curve plotted on graph paper to show the relation between two changing values. 3. A characteristic curve of a one-parameter family of surfaces is the limit of the curve of intersection of two neighboring surfaces of the family as those surfaces approach coincidence.
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