entropy
n. [热] 熵（热力学函数）
n.
熵，平均信息量；负熵；
英英释义
entropy[ 'entrəpi ]
n.
(communication theory) a numerical measure of the uncertainty of an outcome
同义词：informationselective information
(thermodynamics) a thermodynamic quantity representing the amount of energy in a system that is no longer available for doing mechanical work
"entropy increases as matter and energy in the universe degrade to an ultimate state of inert uniformity"
同义词：randomnessS
词组短语
entropy function熵函数
negative entropy负熵；反熵作用
entropy increase熵增加
entropy flow熵流
activation entropy活化熵
partial entropy偏熵
双语例句
用作名词(n.)
The entropy density is constant ahead of the shock.
冲击波前方的熵密度是恒定的。
They can adopt conformations which lead to maximum entropy.
他们可以采取有最大熵值的构象。
权威例句
Maximum entropy modeling of species geographic distributionsEntropy-based algorithms for best basis selection
A maximum entropy approach to natural language processing
A maximum entropy approach to natural language ...
Prediction and entropy of printed English
Approximate entropy as a measure of system complexity.
A Maximum Entropy approach to Natural Language Processing
A new method for gray-level picture threshold using the entropy of the histogram
Physiological time-series analysis using approximate entropy and sample entropy
An overlap invariant entropy measure of 3D medical image alignment
entropy
entropy: [19] The term entropy was coined (as entropie) in 1865 by the German physicist Rudolph Clausius (1822–88), formulator of the second law of thermodynamics. It was he who developed the concept of entropy (a measure of the disorder of a system at atomic or molecular level), and he created the name for it (on the model of energy) from Greek en- ‘in’ and tropé ‘turning, transformation’ (source of English trophy and tropical). The first record of the English version of the word is from 1868.=> trophy, tropical
entropy (n.)
1868, from German Entropie "measure of the disorder of a system," coined 1865 (on analogy of Energie) by German physicist Rudolph Clausius (1822-1888), in his work on the laws of thermodynamics, from Greek entropia "a turning toward," from en "in" (see en- (2)) + trope "a turning, a transformation" (see trope). The notion is supposed to be "transformation contents." Related: Entropic.
It was not until 1865 that Clausius invented the word entropy as a suitable name for what he had been calling "the transformational content of the body." The new word made it possible to state the second law in the brief but portentous form: "The entropy of the universe tends toward a maximum," but Clausius did not view entropy as the basic concept for understanding that law. He preferred to express the physical meaning of the second law in terms of the concept of disgregation, another word that he coined, a concept that never became part of the accepted structure of thermodynamics. [Martin J. Klein, "The Scientific Style of Josiah Willard Gibbs," in "A Century of Nathematics in America," 1989]
1. The laws of thermodynamics involve a concept called entropy for irreversible thermodynamic processes.
热力学定律包括着一个称为熵的有关不可递热力学过程的概念。
-- 来源 -- 英汉 - 辞典例句
2. The second law only allows us to calculate changes in entropy.
第二定律只能让我们计算熵的改变量。
-- 来源 -- 英汉 - 辞典例句
3. It follows that every reversible adiabatic process is one of constant entropy, and may be described as isentropic.
可见可逆绝热过程都是熵不变的过程，可以把这种过程叫做等熵过程。
-- 来源 -- 英汉 - 辞典例句
4. The function is called the entropy of the system, and is denoted by S.
此函数称为该系统的熵，用S表示。
-- 来源 -- 英汉 - 辞典例句
5. The entropy density is constant ahead of the shock.
冲击波前方的熵密度是恒定的。
-- 来源 -- 英汉 - 辞典例句
6. They can adopt conformations which lead to maximum entropy.
他们可以采取有最大熵值的构象。
-- 来源 -- 英汉 - 辞典例句
7. For a system of 10 20 molecules, on the other hand, entropy decrease becomes so improbable that it deserves to be called impossible.
另一方面，对于有10 20个分子的系统，熵的减少是如此之不可几，因而理所当然地被说成不可能。
-- 来源 -- 英汉 - 辞典例句
8. He lit upon the law of entropy, and fitted it to history to prove that human energy was being constantly and irrecoverably dissipated.
他把热力学函数定律拿来应用到历史上，证明人类在不断地无可挽回地浪费他们的精力。
-- 来源 -- 英汉 - 辞典例句
9. MIBARK算法基于信息论的方法，用信息熵来定义属性的重要性。
MIBARK algorithm defined the attribute importance using the information entropy.
-- 来源 -- dict.cnki.net
10. A third statement of the second law of thermodynamics makes use of a new concept called entropy.
热力学第二定律的第三种陈述方式引用了一个叫做熵的新概念。
-- 来源 -- 英汉 - 辞典例句
entropy
