Analysis and application of characteristic parameters of normal probability frequency distribution map of apparent formation water resistivity 非线性电阻分布特性视地层水电阻率正态分布分析及应用
The normal mixed distribution model can be used to get probability density or to simulate population which can not be fitted by standard parameters distribution classes. 正态混合模型还可以用来对那些不能用标准的参数分布族来拟和的总体进行密度估计或近似。
To define a particular normal probability distribution, we need only two parameters: the mean(μ) and the standard deviation(θ). 确定一个具体的正态概率分布,只需要两个参数:平均数μ和标准差θ。
The assessment of the quality of regional uranium deposit resource applying the normal probability distribution of the known ore-body quality 应用已知矿体质量的正态概率分布评价区域铀矿资源质量
It is proved that the measured values of microhardness in the different stages of fatigue obey the normal probability distribution by measured results of microhardness on the surface of structural steel during fatigue. 通过对疲劳过程中结构钢表面显微硬度测试结果的检验,证明了不同疲劳阶段的显微硬度测试值服从正态概率分布。
Coordinates of a normal probability paper are calculated with a approximate formula of normal distribution integral curve and drawn on screen. 采用正态分布积分曲线的近似公式计算概率格纸的坐标,并在屏幕绘图。
This paper introduces and justifies the evaluation of classification using the normal distribution model which is the most fundamental one in the probability distribution functions. Then it puts forward the design method of classifying map content using the principle of normal distribution. 本文在介绍应用概率分布函数中最基本的正态分布来评价地图内容分级方案合理性的基础上,提出了用正态布原理设计地图内容分级的方法。
Regression check of normal probability distribution 正态概率分布的回归检验
The experiment results show that the damage power threshold of IC fit normal distribution, and the variance is very small, so the damage probability fits 0-1 distribution. 器件损伤功率阈值基本呈正态分布,且方差较小,因此,器件的损伤概率近似于0~1分布。
The paper points out that the finish error of blades does not conform to normal distribution law, hence the error probability distribution function is derived for this specific process. 本文指出了叶片精加工的误差不符合正态分布规律,并推导了叶片精加工的误差概率分布函数。
In educational statistics, all the probability distribution of random approximates the normal distribution. This article uses figures charts to express that the calculation of probability which obey the normal distribution provide the scientific accordance for the evaluation of students 'experimental ability. 在教育统计中随机变量的概率分布都近似于正态分布,通过利用数表、图表说明服从正态分布的概率计算,给学生实验能力评价提供了科学的依据。
Reliability analysis of structural system for normal and non-normal probability distribution 正态和非正态分布下结构系统的可靠性分析
The results showed that in different fatigue stages the measured values of microhardness obey normal probability distribution and the variances of microhardness present certain degree dispersivity. 研究结果表明,不同疲劳阶段,试样表面显微硬度测试值呈正态分布,显微硬度方差在整个疲劳过程中始终呈现较大的离散性。
In the situation of structural performance function consisting of non normal dependent random variables, conditional probability distribution function of the variables and the inverse functions will be necessary for calculating structural second order reliability index by using Point Fitting SORM [ 1]. 对结构功能函数为相关非正态随机变量构成情况,使用PFSORM算法确定结构二次可靠指标须使用随机变量的条件分布函数及其反函数。
The results of traditional statistics analysis showed: the data of soil solute salt accorded with normal probability distribution, and the reasonable sampling numbers were 27 in the cotton field under the certain precision and credible level. 传统统计学分析表明土壤盐分测试数据基本符合正态分布;
The traditional theories always assume that the return of financial market follows normal distribution, but in practice it is found that the return of stock index always follows a 'heavy-tailed and skewed' probability distribution, in which traditional normal distribution may not be proper. 传统理论通常假设金融市场收益率服从正态分布,然而实践表明,股票指数收益率的分布具有尖峰厚尾的经验特征,因此采取传统的正态分布往往很难对其进行描述。
The traditional normal distribution cannot be well fitting of the tail of the data, thus it causes the setting of the margin unreasonable. So in the stock index futures market, the probability of the loss is higher than the estimation of normal distribution. 传统的正态分布不能很好地对数据尾部加以描述,从而造成了对保证金设定的不合理,使得现实中发生严重亏损的概率远远大于在正态分布下的估计。
Because the logarithmic normal distribution probability density function can better describe the distribution of the ST coefficients. The logarithmic normal distribution model is used for fitting the likelihood ratio probability of the ST coefficients. 由于对数正态分布概率密度函数能够更好地描述ST系数的分布情况,所以采用对数正态分布模型拟合ST系数的似然比概率。
Due to precipitation distribution is generally skewed distribution instead of the normal distribution, in drought disaster monitoring assessment which combined with precipitation, the paper adopt skewed distribution of probability, that is, AAA distribution to describe changes in precipitation. 由于降水量的分布一般为偏态分布而非正态分布,故在结合降水量进行干旱灾害监测评估中,采用偏态分布概率,即分布来描述降水量的变化。
The network model is based on knowledge of the field experts and the mechanism of process, and a weighted combination of several normal distribution functions is used to approximate the joint probability distribution in Bayesian network, and then the estimated formula for Bayesian network is been given. 在综合考虑生产过程工艺机理的基础上利用领域专家知识构建网络模型,采用加权联合高斯分布函数来近似表达贝叶斯网络模型中的联合概率分布,并给出了贝叶斯网络估计公式。
Thus, this paper has been developed based on the assumption that stock prices follow geometric Brownian motion and trade volume observe the normal distribution, to calculate the probability distribution of liquidity and to study the character of liquidity. 本文尝试通过假设股票价格服从几何布朗运动及成交量服从对数正态分布,计算出流动性的概率分布并结合分布研究流动性的特征。
Since the normal distribution could describe the tails risks not perfect. In reality, huge losses happened far greater than those the probability distribution estimated. 由于正态分布不能很好得描述尾部风险,现实中发生巨大亏损的概率远远大于正态分布的估计。