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exponential gamma
相关语句
  指数γ
     Application of probability weighted moments to estimating parameters in exponential gamma distribution
     概率权重矩法在指数Γ分布中的应用
短句来源
     In this paper PWM method is employed for the estimation of parameters in Exponential Gamma distribution (Ex-T distribution).
     本文将PWM法应用于指数Γ分布的参数估计。
短句来源
     Some characters and applications of generalized gamma distribution-- - log gamma distribution and exponential gamma distribution is introduced.
     介绍了广义Γ分布———对数Γ分布和指数Γ分布的一些特性和应用。
短句来源
  指数г
     THE DESIGN FLOOD OF A HYDROPOWER STATION DERIVED WITH EXPONENTIAL GAMMA DISTRIBUTION
     应用指数Г分布推求水电站设计洪水
短句来源
     It is proposed in this paper that an exponential gamma distribution be used as the theoretical model for the flood extremum distribution.
     本文提出用指数Г分布作为洪水极值分布的理论模型。
短句来源
     By analyzing the statistics of annual precipitation in Shaping Rain Gauging Station,this paper compares the result of P-Ⅲ distribution with that of exponential gamma distribution based on optimum curve fitting. The distribution of exponential gamma pattern is used to analyze the frequency characteristics of annual precipitation data series in Shaping Rain Gauging Station,and the result turns out to be valuable.
     对沙坪站年降水量进行统计分析,对P-Ⅲ线型(Г分布线型)和指数Г分布线型与经验频率点据拟合结果进行比较,并尝试采用指数Г分布线型拟合沙坪站年降水量资料系列进行频率特性分析,取得了较为合理的分析研究成果。
短句来源
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  exponential gamma
The gamma correction in these cameras is sufficiently accurately described by the exponential gamma in the model.
      


It is proposed in this paper that an exponential gamma distribution be used as the theoretical model for the flood extremum distribution. The density functi on of the exponential gamma distribution is derived based on gamma distribution:The exponential gamma distribution, or the frequency curve, is found by integration of the above equation and it is pointed out that P-Ⅲ and K-M type frequency curves are exponential gamma distribution curves under different specific conditions.

本文提出用指数Г分布作为洪水极值分布的理论模型。以Г分布为转换基础,导出了指数Г分布的密度函数 f(x)=β~α/Г了(a)(x-δ)α/b-1e(~(-β)(x-δ),1/b) 对上式积分推求得指数Г分布,即频率曲线。监指出P-Ⅲ型、K-M型频率曲线是在不同的特定条件下的指数Г型分布曲线。用实例说明该函数对洪水适应性较好。

On the basis of Exponential-Gamma distribution, this paper presents a model consisting of 10 kinds of distribution curves. The model contains several frequency curves used commonly in China and other countries, for example, Pearson type-3 distribution, Kritsky and Menkel (USSR) distribution, Logarithmic normal distribution, Gumbel distribution, and so on. Through dealing of parameters, the model can be applicable to the hydrological extreme values of different climatic regions, and has very strong...

On the basis of Exponential-Gamma distribution, this paper presents a model consisting of 10 kinds of distribution curves. The model contains several frequency curves used commonly in China and other countries, for example, Pearson type-3 distribution, Kritsky and Menkel (USSR) distribution, Logarithmic normal distribution, Gumbel distribution, and so on. Through dealing of parameters, the model can be applicable to the hydrological extreme values of different climatic regions, and has very strong flexilibity. In this paper, a real case study using flood data of 240 different hydrological stations in the whole country is submitted. The calculating results are satisfactory.

本文以指数Γ分布为基础,经过分析和推导,该数学模型内涵10种分布曲线,其中包括了当前国内外通常使用的几种频率曲线,如皮尔逊Ⅲ型、克里茨基-闵克里型、对数正态型及耿贝尔型等。只要对模型参数进行适当调整,便可转换成各种频率曲线,以适用于不同气候区水文极值的分布特性,它具有极强的适应功能。选用分布在全国各地区240个水文站的洪水观测资料拟合,其结果较我国采用的皮尔逊Ⅲ型曲线为好。

Probability weighted moments (PWM) were advanced in 1979 by Greenwood et al. The results in previous research show that the method has better statistical property. In 1988, Song Dedun and Ding Jing further verified that the distributions whose inverse forms must be explicitly defined could by no means be a prerequisite for using the PWM method, and they applied PWM method successfully to the estimation of parameters in Pearson Type-Ill distribution (P-III distribution) although this sort of distribution never...

Probability weighted moments (PWM) were advanced in 1979 by Greenwood et al. The results in previous research show that the method has better statistical property. In 1988, Song Dedun and Ding Jing further verified that the distributions whose inverse forms must be explicitly defined could by no means be a prerequisite for using the PWM method, and they applied PWM method successfully to the estimation of parameters in Pearson Type-Ill distribution (P-III distribution) although this sort of distribution never has explicit inverse form. In this paper PWM method is employed for the estimation of parameters in Exponential Gamma distribution (Ex-T distribution).The results from Monte Carlo experiments have shown that PWM method is of more favorable statistical characteristics as compared with conventional moments method.

指数Γ分布有四个独立参数。分布曲线的弹性好,适应性强,与我国各地区洪水系列点据的配合较好。但是,由于它有四个参数,使得分布参数的估计比较困难。由我国宋德敦、丁晶(1988年)将美国Greenwood等人(1979年)提出的概率权重矩法(PWM),应用于P-Ⅲ分布,取得较好效果。本文将PWM法应用于指数Γ分布的参数估计。统计试验结果和实例分析表明,PWM法用于指数Γ分布的参数估计时,具有较好的统计特性。

 
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