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1)  conditional entropy
条件熵
1.
Reduction method of decision table based on new conditional entropy;
基于新的条件熵的决策表约简方法
2.
An incremental approach to computation of a core based on conditional entropy;
一种基于条件熵的增量核求解方法
3.
Rules extraction method of decision tree based on new conditional entropy;
基于新的条件熵的决策树规则提取方法
2)  condition entropy
条件熵
1.
Based on the characteristics of entropy,relevant entropy and condition entropy,a rough granulation approaching variable is added in the rough set theory.
本文基于信息论中信息熵、相对熵和条件熵的概念和性质,在粗糙集系统中增加了一个粗粒度逼近量,并根据粗粒度逼近量提出了一种多尺度逼近的属性约简或者叫规则提取的新算法。
2.
To this issue,the condition entropy is used as heuristic information for reducing the searching room.
针对这一不足,利用粗糙集理论中的条件熵作为启发信息,来缩小搜索空间,并在算法中加入消除冗余属性的二次约简过程,得到一种改进的启发式属性约简算法。
3.
Firstly,the paper gives some concept of rough set theory:decision table,indiscernible relation,information entropy and condition entropy.
首先给出粗糙集理论的几个基本概念:决策表、不可分辨关系、信息熵和条件熵,然后对离散化问题进行介绍,给出断点分类的条件熵定义,在此基础上给出了断点选择的粗糙集连续属性离散化算法。
3)  entropy condition
熵条件
1.
Researches on the resolution of fast large time step entropy condition scheme;
快速大时间步长熵条件格式的分辨率研究
2.
By means of characteristics and based on initial conservation law, this paper discusses the existence and uniqueness of weak solution, along with its Rankine-Hugoniot and Entropy Condition.
本文运用特征线方法 ,从交通流原始守恒方程出发给出了解决弱解存在与唯一性的间断关系与熵条件 。
3.
With the help of characteristic analysis,under suitable generalized Rankine-Hugoniot relation and entropy condition,four different structures of Riemann solutions are established uniquely,in which the interactions among delta shock wave,vacuum and contact discontinuity are clarified.
借助于特征分析方法,在适当的广义Rankine-Hugoniot条件和熵条件下,得到狄拉克激波与真空、接触间断之间相互作用的结果,建立了四种不同的唯一的黎曼解结构。
4)  the condition of entropy increase
熵增条件
5)  isentropic conditions
等熵条件
6)  random conditional entropy
随机条件熵
1.
The notion of entropy density deviation and average random conditional entropy of arbitrary information sources on finite alphabet set relative to nonhomogeneous Markov chain are introduced,and the random deviation inequations between the relative entropy densities of arbitrary information sources and the average random condition entropy relative to nonhomogenous Markov chain are obtained.
通过引进有限字母集上任意信源相对于非齐次马氏链的熵密度偏差和平均随机条件熵的概念 ,得出了任意信源的相对熵密度与相对于非齐次马氏链的平均随机条件熵之间的随机偏差不等式 。
2.
A class of strong limit theorems for the random conditional entropy densities of the sequence of arbitrary random variables on the gambling system are discussed by applying the differentiation on a net and analytical methods.
采用网微分法和分析运算方法来研究赌博系统中任意随机变量序列随机条件熵的一类强极限定理,并由此得出若干任意信源的Shannon-Mcmillan定理。
3.
In this paper, the notion of random conditional entropy of finite nonhomogeneous markov chains is introduced, and the relation between this notion and the relative entropy density is studied.
本文引进有限非齐次马氏链随机条件熵的概念,研究这个概念与相对熵密度的关系,并通过数列的绝对平均收敛的概念给出有限非齐次马氏链的相对频率、相对熵密度和平均随机条件熵a。
补充资料:标准熵
分子式:
CAS号:

性质:根据热力学第三定律的普朗克表述(即0K时,纯物质的完整晶体的熵等于零)规定的物质的熵的绝对值,有时也称为规定熵(conventional entropy)。物理化学手册中给出的是纯物质在标准状态和298.15K的摩尔规定熵,也称为标准熵,符号Sm,298.15,单位J/(K·mol)。在确定熵值时需要用量热方法测量热容Cp与温度的关系以及各种相变热,因此规定熵也称量热熵(calorimetric entropy)。

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