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Что (кто) такое absolute galvanometer - определение
INSTRUMENT THAT PROVIDED THE FIRST PRACTICAL ELECTROCARDIOGRAM
Einthoven galvanometer
Average absolute deviation
SUMMARY STATISTIC OF VARIABILITY
Mean Absolute Deviation; Mean absolute deviation; Maximum absolute deviation
The average absolute deviation (AAD) of a data set is the average of the absolute deviations from a central point. It is a summary statistic of statistical dispersion or variability.
Least absolute deviations
STATISTICAL OPTIMALITY CRITERION
Least absolute deviation; Minimum absolute deviation; Minimum absolute deviations; Least-absolute-deviations regression; Sum of absolute deviations; Least absolute errors; Least absolute value; Least absolute residuals; Least absolute values; LAD regression
Least absolute deviations (LAD), also known as least absolute errors (LAE), least absolute residuals (LAR), or least absolute values (LAV), is a statistical optimality criterion and a statistical optimization technique based minimizing the sum of absolute deviations (sum of absolute residuals or sum of absolute errors) or the L1 norm of such values. It is analogous to the least squares technique, except that it is based on absolute values instead of squared values.
Galvanometer
![camera]], together with a [[photoresistor]] (seen in the hole on top of the leftpart).](https://commons.wikimedia.org/wiki/Special:FilePath/Autoexpmeter.JPG?width=200 "camera]], together with a [[photoresistor]] (seen in the hole on top of the leftpart).")
![D'Arsonval/Weston galvanometer (ca. 1900). Part of the magnet's left [[pole piece]] is broken out to show the coil.](https://commons.wikimedia.org/wiki/Special:FilePath/D'Arsonval ammeter movement.jpg?width=200 "D'Arsonval/Weston galvanometer (ca. 1900). Part of the magnet's left [[pole piece]] is broken out to show the coil.")
.jpg?width=200 "Thomson mirror galvanometer, patented in 1858.")
![Pouillet]] Tangent Galvanometer on display at [[Musée d'histoire des sciences de la Ville de Genève]]](https://commons.wikimedia.org/wiki/Special:FilePath/Sine and Tangent Galvanometer-MHS 98-IMG 3874-gradient.jpg?width=200 "Pouillet]] Tangent Galvanometer on display at [[Musée d'histoire des sciences de la Ville de Genève]]")
![Galvanometer on display at [[Musée d'histoire des sciences de la Ville de Genève]]](https://commons.wikimedia.org/wiki/Special:FilePath/Galvanometer-MHS 229-IMG 3875-gradient.jpg?width=200 "Galvanometer on display at [[Musée d'histoire des sciences de la Ville de Genève]]")
INSTRUMENT TO MEASURE ELECTRIC CURRENT
Tangent galvanometer; D'Arsonval meter; D'Arsonval movement; Galvo; Null detector; Null indicator; Astatic galvanometer; D'arsonval meter movement; D'Arsonval meter movement; D'Arsonval galvanometer; Schweigger multiplier; Taut band movement
A galvanometer is an electromechanical measuring instrument for electric current. Early galvanometers were uncalibrated, but improved versions, called ammeters, were calibrated and could measure the flow of current more precisely.
Википедия
String galvanometer
A string galvanometer is a sensitive fast-responding measuring instrument that uses a single fine filament of wire suspended in a strong magnetic field to measure small currents. In use, a strong light source is used to illuminate the fine filament, and the optical system magnifies the movement of the filament allowing it to be observed or recorded by photography. The principle of the string galvanometer remained in use for electrocardiograms until the advent of electronic vacuum-tube amplifiers in the 1920s.
