分布参数

The effects of different parameters and cross-sections on axial velocity, the distribution of secondary flow, temperature field, turbulent kinetic energy, wall friction coefficient and wall Nusselt number are analyzed in detail.

详细分析了充分发展的和发展段的湍流管道内，不同截面形状和几何参数对轴向速度分布，截面二次流结构，湍动能，曲线管道摩擦比，温度分布和曲线管道Nusselt系数比等管道流动和传热特性的影响。

Finally,the wind velocity data of Nantong observatory are used to verify the methods above-mentioned,and the likelihood ratio method and Kolmogorov statistic are used to test the fitness of the distribution.

引入涵盖Gumbel，Frechet，Weibull三类极值渐近分布的广义极值分布模型，给出该模型参数的极大似然估计的计算公式，并由此导出设计基本风速及其置信上限的计算方法。

Further, the maximum likelihood function is described as an unitary function of shape parameter. It is easy to be solved with the dichotomy.

但是三参数Weibul1 分布的参数估计比较复杂，人们围绕这一问题做了许多研究，提出了许多方法。

Since the limiting distribution is not tractable, we herein introduce the Nonparametric Monte Carlo Test to determine the critical values.

由于该检验统计量的极限分布依赖未知参数，我们采用非参数蒙特卡罗方法确定临界值。

In the study based on noise-distribution, an approach to compute local regularization parameter and design local regularization operator adaptively is proposed according to the distribution of the noise.

在基于噪声分布的方法中，提出根据噪声分布自适应计算正则化参数及设计正则化算子的方法。

What's more,as far as the location-scale population is concerned,we show that the Fisher information matrix from an RSS sample is independent of the location parameter and is inversely proportional to the scale parameter.

本文进一步表明，对于位置-尺度分布族RSS样本下的Fisher信息矩阵与位置参数无关，与尺度参数成反比。

Furthermore, computer simulation aimed at Weibull distribution and lognormal distribution is processed, and results show that the provided method is feasible and easy to implement.

论文还对Weibull分布和对数正态分布作了相应的计算机模拟，结果表明所给参数估计方法是容易施行并且行之有效的。

I will introduce a method to solve this problem when data come from some common life distribution, such as Weibull distribution and Lognormal distribution. In chapter 1, we introduce background of grouped data and how to analyze them with classical methods. In chapter 2, we introduce EM algorithm and show that the estimation of the parameters get through this algorithm is convergent under certain conditions. In chapter 3, we use EM algorithm to estimate parameters in Weibull distribution and Lognormal distribution by grouped data and the simulation shows this method is available.

第一章首先介绍分组数据问题的背景以及如何利用经典的统计方法对分组数据进行分析，并指出分析过程中所遇到的困难；第二章将介绍一种处理不完全数据时的常用算法，EM算法，并说明利用这种算法所得到的估计具有良好的收敛性；第三章将利用EM算法对基于分组数据的威布尔分布和对数正态分布进行参数估计，并进行模拟表明此方法的可行性与有效性。

In order to obtain spectrum intensity distribution inside a circular luminant without damage,a measuring method depending on Abel transform was developed.

为了在无损状态下获得圆截面发光体内部谱线强度空间相对分布，提出了利用Abel变换，将被检对象外部的逐层扫描数据通过3次样条函数方法数值求解，从而得到被检对象内部参数分布情况的实验方法。

The thesis studies axis distribution of magnetic field and carries on the simulation and computation using MATLAB. Then, the air-cored cylindrical winding is selected.

以磁场的基本理论为基础研究了空心线圈的轴向磁场分布与线圈参数的关系，并用MATLAB软件对磁场分布进行了计算和仿真，确定了空心圆柱线圈的设计方案。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。