characteristic curve


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char·ac·ter·is·tic curve

sensitometric curve of radiographic film, a plot of the film density versus the logarithm of the relative exposure.
Farlex Partner Medical Dictionary © Farlex 2012

curve

(kurv) [L. curvus, bent, crooked]
A bend, chart, or graph.

bell curve

Normal distribution.

curve of Carus

See: curve of Carus

characteristic curve

Sensitometric curve.

dental curve

Curve of Spee.

D log E curve

Sensitometric curve.

dose response curve

A graph charting the effect of a specific dose of drug, chemical, or ionizing radiation.

dye-dilution curve

A graph of the disappearance rate of a known amount of injected dye from the circulation; used to measure cardiac function.

epidemic curve

A chart or graph in which the number of new cases of an illness is plotted over time.

Gaussian curve

Normal distribution.

growth curve

A graph of heights and weights, head circumference, and body mass index of infants and children of various ages. A line connecting the data points produces the curve. Usually the changes in height and weight are shown on the same chart. Growth charts are specific for age and gender.

learning curve

The effect of learning or practice on the performance of an intellectual or physical task. The term describes the acquisition of competence with experience, time, and training.

normal curve

Normal distribution.

receiver operating curve

Abbreviation: ROC curve
A plot of the fraction of true positives test results versus the fraction of false positive test results; the sensitivity of a test versus (1-the test specificity).
Synonym: receiver operating characteristic

sensitometric curve

In radiographic film analysis, the curve derived by graphing the exposure to the film versus the film density. Analysis yields information about the contrast, speed, latitude, and maximum and minimum densities of the film or film-screen system. Digital radiography systems exhibit linear curves.
Synonym: characteristic curve; D log E curve; Hurter and Driffield curve

curve of Spee

See: curve of Spee

Stephan curve

See: Stephan curve

survival curve

In radiobiology, a dose response curve.

time-temperature cooling curve

The mathematical relation that plots the physical and chemical behaviors of dental (and other) materials as their temperature decreases over time.
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
The estimation of PV equivalent circuit parameters has been tackled in a variety of recent works, which explore a multidude of different approaches for dealing with the non-linearities, possible approximations and other problems associated to I-V characteristic curve estimation [3-10].
In the process of steering, the signals of vehicle speed, steering wheel torque and assist current are gathered and transmitted to the controller, then it will determine the control voltage of assist motor according to the assistance characteristic curve, which will make assist motor produce assist torque that is transmitted to the pinion-rack mechanism through the reducer.
Houston, "Prediction of the soil-water characteristic curve based on grain-size-distribution and index properties," in Geotechnical Special Publications 130-142 & GRI-18; Proceedings of the GeoFrontiers 2005 Congress, pp.
(3) According to results of the direct shear tests and the soil-water characteristic curve of Yudong silt, the shear strength formula proposed by Bishop is not applicable, while an alternative method based on the Fredlund formula is appropriate.
We also showed that, based on receiver operating characteristic curve with area under the curve of 0.76, cutoff NLR value of 1.93 had 83% sensitivity and 54% specificity in differentiating SLE patients with or without nephritis.
The V-I characteristic curve of the electrical arc obtained by flicker effect as a result of the simulation.
* Line 3 is characteristic curve of the fan calculated using Equation 6
The response characteristic curves of the load sensing variable displacement pump are shown in Figure 9.
(1) The Analysis and Comparison between D-P Characteristic Curve and V-P Characteristic Curve of PV.
A high quantity of the nodes improves the accuracy of the characteristic curve but also challenges the optimization algorithm.
It is evident at every moment in every line and stroke of his drawing, in its characteristic curve and arabesque, its quick certainty and summary insouciance.
The receiver operating characteristic curve for FIT test results and colorectal carcinoma showed good predictive ability with an AUC of 0.79 (95% confidence interval 0.71-0.87).

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