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In statistics and machine learning, leakage (also known as data leakage or target leakage) is the use of information in the model training process which would not be expected to be available at prediction time, causing the predictive scores (metrics) to overestimate the model's utility when run in a production environment.
A leakage occurs when fluid is lost through a leak. Leakage may also refer to: Leakage (chemistry), a process in which material is lost through holes or defects in containers; Leakage (economics) Carbon leakage or emissions leakage, whereby another country increases its greenhouse gas emissions in response to a unilateral climate policy
In electronics, leakage is the gradual transfer of electrical energy across a boundary normally viewed as insulating, such as the spontaneous discharge of a charged capacitor, magnetic coupling of a transformer with other components, or flow of current across a transistor in the "off" state or a reverse-polarized diode.
The leakage is evident in the 2nd row, blue trace. It is the same amount as the red trace, which represents a slightly higher frequency that does not have an integer number of cycles. When the sinusoid is sampled and windowed, its discrete-time Fourier transform also exhibits the same leakage pattern (rows 3 and 4).
Types of leak openings include a puncture, gash, rust or other corrosion hole, very tiny pinhole leak (possibly in imperfect welds), crack or microcrack, or inadequate sealing between components or parts joined together. When there is a puncture, the size and shape of the leak can often be seen, but in many other cases, the size and shape of ...
A data breach, also known as data leakage, is "the unauthorized exposure, disclosure, or loss of personal information". [ 1 ] Attackers have a variety of motives, from financial gain to political activism , political repression , and espionage .
The economic definition of leakage is a situation in which income exits an economy instead of staying within. In retail, leakage refers to consumers spending money outside the local market. For instance, crossing a border to buy goods instead of making the same purchase from local shops.
Information leakage happens whenever a system that is designed to be closed to an eavesdropper reveals some information to unauthorized parties nonetheless. In other words: Information leakage occurs when secret information correlates with, or can be correlated with, observable information.