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叉熵
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  cross-entropy
     Solution of minimum cross-entropy optimization problems with cross-entropy constraints
     带有叉熵约束的最小叉熵优化问题的求解
短句来源
     Chapter two introduces the concept of entropy in information theory, maximum entropy principle, and minimum cross-entropy principle.
     第二章首先介绍了信息论中的熵、最大熵原理、最小叉熵原理。
短句来源
     Solution of the optimization problems of minimum cross-entropy with cross-entropy-type constraints was studied.
     研究了带有叉熵约束的最小叉熵优化问题的求解问题.
短句来源
     Chapter 5. Discussions on the optimization of stop-loss reinsurance are given firstly, and then utilizing the minimum cross-entropy principle, optimization model is established, and the upper and lower bounds of the stop-loss premium are given.
     第五章讨论了停止-损失再保险的最优性,然后利用最小叉熵原理建立优化模型,求出了再保险人保费的上下界。
短句来源
     Then the perturbation methods are used to an equivalent NLP problem of minmax problems and the resulted smooth functions are just aggregate functions obtained by maximum entropy principle and minimum cross-entropy principle, respectively.
     然后文中把这种方法应用到有限维极大极小问题的一个等价非线性规划问题,得到了相应的光滑函数,且与用最大熵原则和最小叉熵原则得到的凝聚函数相同。
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  “叉熵”译为未确定词的双语例句
     Mean-Cross-Entropy Model for Portfolio Optimization
     均值-叉熵证券投资组合优化模型
短句来源
     Chapter 2 is devoted to introducing the entropy concept and entropy optimization principles, which are the tools for predicting the probability distribution.
     第二章简要介绍了信息熵的概念和两种推断概率分布的准则,即最大熵原理和最小叉熵原理。
短句来源
     Based upon the duality theory of convex programming, we derive the corresponding dual programs of two entropy optimization problems.
     利用凸规划的对偶理论,分别推导出最大熵和最小叉熵问题的对偶规划,从而可以极大地减少计算工作量和有助于两个熵优化原理的推广应用。
短句来源
     In Chapter 3, the graduation and prediction models for mortality are studied. Based on two entropy optimization principles, we present two graduation models and one mortality predicting model that include the maximum entropy graduation model, the multi-objective graduation model and the minimum cross entropy prediction model, respectively.
     第三章将熵优化方法作为一种统计推断的工具,应用到寿险精算中的生存分析问题,针对死亡率修匀和死亡率调整,建立了两个死亡率修匀模型(分别为最大熵修匀模型和多目标修匀模型)和一个死亡率预测模型(最小叉熵模型)。
短句来源
     The main feature of this new approach lies in the fact that a probability transformation process, from anestimated one into a "real" one, is embedded in the premium derivation and transformation formula is explicitly given.
     第五章提出了一个新的保费定价方法,即叉熵正则化方法,并导出了一个指数型的保费定价公式。
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  相似匹配句对
     Interrelating Entropy
     相关
短句来源
     Entropy of Black Hole
     黑洞
短句来源
     Mean-Cross-Entropy Model for Portfolio Optimization
     均值-证券投资组合优化模型
短句来源
     Solution of minimum cross-entropy optimization problems with cross-entropy constraints
     带有约束的最小优化问题的求解
短句来源
     KNIFE & FORK
     刀与
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  cross-entropy
The cross-entropy method with fractile constraints has been developed to estimate a random variable when the data are a set of independent observations of the variable.
      
Quadratically constrained minimum cross-entropy analysis
      
Quadratically constrained minimum cross-entropy problem has recently been studied by Zhang and Brockett through an elaborately constructed dual.
      
The application of the principle of minimum cross-entropy to the characterization of the exponential-type probability distributi
      
Systematic and simple characterizations are presented for several familiar distributions in exponential family by means of the principle of minimum cross-entropy (minimum discrimination information).
      
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During using I_O techniques as a planning or forecasting tool, updating input_output coefficients plays a key role. In this paper, based on the minimum cross_entropy principle of information theory, a series of entropy optimization models for updating I_O coefficients are established according to prior information. A dual algorithm for optimization model with an example is presented. Numerical results illustrate that the entropy optimization updating method is feasible and effective.

在投入产出分析中,直接消耗系数的修订具有重要的意义.根据信息论中的最小叉熵原理,按照已知信息的多少,建立了几个可用于修订直接消耗系数的熵优化模型,并给出了求解优化模型的对偶算法和算例.计算实例的结果表明,所建立的模型和给出的算法是可行的、有效的.

The limitations of measuring risk with variance are analyzed on the base of Markowitz portfolio model. So the measurement method of risk is put forward with cross-entropy, and the mean cross entropy optimization model of portfolio is proposed. The new model avoids the complex calculation and can be easily used by general investors.

在研究马科维茨(Markowitz)证券投资组合模型的基础上,分析了该模型用方差度量风险的缺陷,进而提出用叉熵作为风险的度量方法,建立了均值-叉熵的投资组合优化模型.该模型计算简便,更易被一般投资人所使用.

Solution of the optimization problems of minimum cross-entropy with cross-entropy-type constraints was studied.According to the dual theory,a simple geometric programming was proposed to derive a corresponding geometric dual problem instead of cross-entropy optimization problem with cross-entropy constraints,which is a concave programming one with linear constrains,leading to a simpler calculation.

研究了带有叉熵约束的最小叉熵优化问题的求解问题.根据对偶理论,提出了一个简单的几何规划,该方法把一个带有叉熵约束的叉熵优化问题转化成了一个对偶规划,而对偶规划是一个只需要解决一个带有线性约束的凸规划问题,比较容易计算.

 
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