hysteresis - definição. O que é hysteresis. Significado, conceito
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O que (quem) é hysteresis - definição

DEPENDENCE OF THE STATE OF A SYSTEM ON ITS HISTORY
Hysteresis (electric); Hysterisis; Histeresis; Hysteresis effect; Hysteresis Effect; Hysterysis; Hysteresis loss; Hysteresis losses; Hysteresis loop; Histerese; Historesis; Hysteretic; Tipping point (physics); Hystersis; ⎎; Elastic Hysteresis
  • <var>E</var>}} is first decreased, then increased. The curves form a ''hysteresis loop''.

Hysteresis         
·noun A lagging or retardation of the effect, when the forces acting upon a body are changed, as if from velocity or internal friction; a temporary resistance to change from a condition previously induced, observed in magnetism, thermoelectricity, ·etc., on reversal of polarity.
hysteresis         
[?h?st?'ri:s?s]
¦ noun Physics the phenomenon in which the value of a physical property lags behind changes in the effect causing it, especially that involving magnetic induction and a magnetizing force.
Origin
C19: from Gk husteresis 'shortcoming'.
Hysteresis         
Hysteresis is the dependence of the state of a system on its history. For example, a magnet may have more than one possible magnetic moment in a given magnetic field, depending on how the field changed in the past.

Wikipédia

Hysteresis

Hysteresis is the dependence of the state of a system on its history. For example, a magnet may have more than one possible magnetic moment in a given magnetic field, depending on how the field changed in the past. Plots of a single component of the moment often form a loop or hysteresis curve, where there are different values of one variable depending on the direction of change of another variable. This history dependence is the basis of memory in a hard disk drive and the remanence that retains a record of the Earth's magnetic field magnitude in the past. Hysteresis occurs in ferromagnetic and ferroelectric materials, as well as in the deformation of rubber bands and shape-memory alloys and many other natural phenomena. In natural systems it is often associated with irreversible thermodynamic change such as phase transitions and with internal friction; and dissipation is a common side effect.

Hysteresis can be found in physics, chemistry, engineering, biology, and economics. It is incorporated in many artificial systems: for example, in thermostats and Schmitt triggers, it prevents unwanted frequent switching.

Hysteresis can be a dynamic lag between an input and an output that disappears if the input is varied more slowly; this is known as rate-dependent hysteresis. However, phenomena such as the magnetic hysteresis loops are mainly rate-independent, which makes a durable memory possible.

Systems with hysteresis are nonlinear, and can be mathematically challenging to model. Some hysteretic models, such as the Preisach model (originally applied to ferromagnetism) and the Bouc–Wen model, attempt to capture general features of hysteresis; and there are also phenomenological models for particular phenomena such as the Jiles–Atherton model for ferromagnetism.

It is difficult to define hysteresis precisely. Isaak D. Mayergoyz wrote "..the very meaning of hysteresis varies from one area to another, from paper to paper and from author to author. As a result, a stringent mathematical definition of hysteresis is needed in order to avoid confusion and ambiguity.".