n. [ Gr. &unr_; a turning in; &unr_; in + &unr_; a turn, fr. &unr_; to turn. ] (Thermodynamics) A certain property of a body, expressed as a measurable quantity, such that when there is no communication of heat the quantity remains constant, but when heat enters or leaves the body the quantity increases or diminishes. If a small amount, h, of heat enters the body when its temperature is t in the thermodynamic scale the entropy of the body is increased by h ÷ t. The entropy is regarded as measured from some standard temperature and pressure. Sometimes called the thermodynamic function. [ 1913 Webster ]
The entropy of the universe tends towards a maximum. Clausius. [ 1913 Webster ]
(n) (communication theory) a numerical measure of the uncertainty of an outcome, Syn.selective information, entropy, Example: the signal contained thousands of bits of information
(n) (thermodynamics) a thermodynamic quantity representing the amount of energy in a system that is no longer available for doing mechanical work, Syn.S, entropy, Example: entropy increases as matter and energy in the universe degrade to an ultimate state of inert uniformity
[じょうけんつきエントロピー, joukentsuki entoropi-] (n) { comp } conditional entropy; mean conditional information content; average conditional information content [Add to Longdo]
[じょうけんつきへいきんじょうほうりょう, joukentsukiheikinjouhouryou] (n) { comp } conditional entropy; mean conditional information content; average conditional information content [Add to Longdo]
[じょうけんつきエントロピー, joukentsuki entoropi-] conditional entropy, mean conditional information content, average conditional information content [Add to Longdo]
[じょうけんつきへいきんじょうほうりょう, joukentsukiheikinjouhouryou] conditional entropy, mean conditional information content, average conditional information content [Add to Longdo]
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