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The measure precision at k, for example, is a measure of precision looking only at the top ten (k=10) search results. More sophisticated metrics, such as discounted cumulative gain , take into account each individual ranking, and are more commonly used where this is important.
In effect, the Kelvin–Varley divider is an electromechanical precision digital-to-analog converter. The circuit is used for precision voltage measurements in calibration and metrology laboratories. It can achieve resolution, accuracy and linearity of 0.1 ppm (1 in 10 million). [1]
Metrology is a wide reaching field, but can be summarized through three basic activities: the definition of internationally accepted units of measurement, the realisation of these units of measurement in practice, and the application of chains of traceability (linking measurements to reference standards).
Atom interferometry techniques are reaching sufficient precision to allow laboratory-scale tests of general relativity. [55] Interferometers are used in atmospheric physics for high-precision measurements of trace gases via remote sounding of the atmosphere.
An important application of particular note is the detection of gravitational radiation in projects such as LIGO or the Virgo interferometer, where high-precision measurements must be made for the relative distance between two widely separated masses. However, the measurements described by quantum metrology are currently not used in this ...
A precision-recall curve plots precision as a function of recall; usually precision will decrease as the recall increases. Alternatively, values for one measure can be compared for a fixed level at the other measure (e.g. precision at a recall level of 0.75) or both are combined into a single measure.
Precision engineering is a branch of engineering that focus on the design, development and manufacture of product with high levels of accuracy and repeatability. It involves the use of advanced technologies and techniques to achieve tight tolerance and dimensional control in the manufacturing process.
Configurations with a high numerical aperture can measure on relatively steep flanks. Multiple sensors, with the same or different measurement ranges, can be used simultaneously, allowing differential measurement approaches (TTV) or expanding the use case of a system. Contact profilometer: this method is the most common surface measurement ...
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