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Τι (ποιος) είναι characteristic curve - ορισμός
WIKIMEDIA DISAMBIGUATION PAGE
Characteristic curves; Characteristic curve (disambiguation)
Characteristic Curve
A curve indicating the variations in electro-motive force developed
during the rotations of the armature of a dynamo or other generator of
E. M. F. The term as used in the electrical sense is thus applied,
although the indicator diagram of a steam engine may be termed its
characteristic curve, and so in many other cases. As the amperes taken
from a series generator are increased in number, the E. M. F. rises, it
may be very rapidly up to a certain point, and thereafter more slowly.
To construct the curve coordinates, q. v., are employed. The resistance
of the dynamo and of the outer circuit being known, the current
intensity is measured. To obtain variations in electro-motive force the
external resistance is changed. Thus a number of ampere readings with
varying known resistance are obtained, and for each one an
electro-motive force is calculated by Ohm's law. From these data a curve
is plotted, usually with volts laid off on the ordinate and amperes on
the abscissa.
By other methods other characteristic curves may be obtained, for which
the titles under Curve may be consulted.
characteristic curve
¦ noun a graph showing the relationship between two variable but interdependent quantities.
Receiver operating characteristic
PERFORMANCE OF A BINARY CLASSIFIER SYSTEM AS ITS DISCRIMINATION THRESHOLD IS VARIED
Receiver-Operator Characteristic; Receiver-operator characteristic; Receiver operator characteristic; ROC analysis; ROC Analysis; Roc analysis; ROC Curve; ROC curve; Receiver operator curve; Roc curve; ROC plot; Receiver Operating Characteristic; Receiver operating curve; Receiver operating characteristic curve; Auroc; Reciever operating curve; C-statistic; AUROC; Area under the curve (receiver operating characteristic); ROC AUC; Receiver curve
A receiver operating characteristic curve, or ROC curve, is a graphical plot that illustrates the diagnostic ability of a binary classifier system as its discrimination threshold is varied. The method was originally developed for operators of military radar receivers starting in 1941, which led to its name.
Βικιπαίδεια
Characteristic curve
Characteristic curve may refer to:
- In electronics, a current–voltage characteristic curve
- Semiconductor curve tracer, a device for displaying the above curve
- In photography, a plot of film density: see sensitometry
- In mathematics, used in the method of characteristics for solving partial differential equations.
