| 释义 |
equipartition Physics.|ˌiːkwɪpɑːˈtɪʃən|
[f. equi- + partition.]
In full equipartition of energy. A principle of thermodynamics which states that when a system is in thermal equilibrium the kinetic energy is equally divided amongst the degrees of freedom.
Earlier called ‘the law of equal partition’, ‘the law of partition of kinetic energy’, etc.
1902Phil. Mag. IV. 385 The object of the present paper is, firstly, to give a proof of Boltzmann's Theorem on the Equipartition of Energy from a somewhat new point of view; and, secondly, to examine what are the precise conditions under which equipartition will take place, and whether these conditions..will occur in an actual gas. 1905Nature 18 May 54/2 Equipartition of energy is supposed to establish itself within a small fraction of a second. 1929Lowry & Sugden Physical Chem. 19 According to Maxwell's principle of equipartition of energy, each degree of freedom calls for an equal increment of internal energy. 1957Encycl. Brit. XIII. 386/2 According to a famous principle known as the equipartition of energy, when a dynamical system is in statistical equilibrium at a given temperature..the same amount of average kinetic energy is associated with each degree of freedom. 1962W. B. Thompson Introd. Plasma Physics iii. 25 At the same time, collisions between the original and secondary electrons result in an equipartition of energy, so that the electrons acquire a roughly Maxwellian distribution at some temperature T-. 1966K. Mendelssohn Quest for Absolute Zero vi. 114 Another aspect of this picture which will later acquire great significance is the so-called ‘law of equipartition’. This says that the energy will be distributed over all degrees of freedom. |