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Entropy

Entropy En"tro*py, n. [Gr. ? a turning in; ? in + ? a turn, fr. ? 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. The entropy of the universe tends towards a maximum. --Clausius.

Entropy En"tro*py, n. [Gr. ? a turning in; ? in + ? a turn, fr. ? 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. The entropy of the universe tends towards a maximum. --Clausius.

- Entropy is a scientific concept as well as a measurable physical property that is most commonly ****ociated with a state of disorder, randomness, or uncertainty...

- In information theory, the entropy of a random variable is the average level of "information", "surprise", or "uncertainty" inherent to the variable's...

- thermodynamic equilibrium where the entropy is highest at the given internal energy. An increase in the combined entropy of system and surroundings accounts...

- In information theory, the cross-entropy between two probability distributions p {\displaystyle p} and q {\displaystyle q} over the same underlying set...

- Q ) {\displaystyle D_{\text{KL}}(P\parallel Q)} (also called relative entropy and I-divergence), is a statistical distance: a measure of how one probability...

- and electrical engineering. A key measure in information theory is entropy. Entropy quantifies the amount of uncertainty involved in the value of a random...

- unavailable as a source for useful work. Entropy may also refer to: Entropy (classical thermodynamics), thermodynamic entropy in macroscopic terms, with less emphasis...

- constant, and in Planck's law of black-body radiation and Boltzmann's entropy formula, and is used in calculating thermal noise in resistors. The Boltzmann...

- theory, the Rényi entropy generalizes the Hartley entropy, the Shannon entropy, the collision entropy and the min-entropy. Entropies quantify the diversity...

- Maximum entropy thermodynamics Law of maximum entropy production Maximum entropy spectral estimation Principle of maximum entropy Maximum entropy probability...

- In information theory, the entropy of a random variable is the average level of "information", "surprise", or "uncertainty" inherent to the variable's...

- thermodynamic equilibrium where the entropy is highest at the given internal energy. An increase in the combined entropy of system and surroundings accounts...

- In information theory, the cross-entropy between two probability distributions p {\displaystyle p} and q {\displaystyle q} over the same underlying set...

- Q ) {\displaystyle D_{\text{KL}}(P\parallel Q)} (also called relative entropy and I-divergence), is a statistical distance: a measure of how one probability...

- and electrical engineering. A key measure in information theory is entropy. Entropy quantifies the amount of uncertainty involved in the value of a random...

- unavailable as a source for useful work. Entropy may also refer to: Entropy (classical thermodynamics), thermodynamic entropy in macroscopic terms, with less emphasis...

- constant, and in Planck's law of black-body radiation and Boltzmann's entropy formula, and is used in calculating thermal noise in resistors. The Boltzmann...

- theory, the Rényi entropy generalizes the Hartley entropy, the Shannon entropy, the collision entropy and the min-entropy. Entropies quantify the diversity...

- Maximum entropy thermodynamics Law of maximum entropy production Maximum entropy spectral estimation Principle of maximum entropy Maximum entropy probability...

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