对数

Meanwhile,according to the results we draw the flood insurance loss probability curve,and concluded that it is similar to lognormal distribution.

同时，根据计算结果得到洪水保险损失概率曲线，认为洪水保险损失近似服从对数正态分布。

To analyze these two important factors at the same time,this paper uses the Lognormal distribution curve as the income distribution curve to establish a vehicle ownership forecast model.

急速增长的中国汽车保有量不仅和收入水平的上升有关，也和收入差距的扩大有关，为了同时考虑这两个影响汽车普及的重要因素，本文以对数正态分布曲线作为收入分布曲线构建了中国汽车保有量的预测模型。

The random cascade model with a lognormal distribution is used to simulate the infiltration process in soils, and the different methods are applied to estimate the model parameters.

随机层叠模型中具有对数正态分布性质的随机层叠发生器被用来描述水流入渗过程，不同的方法被用于模型参数求解。

For restricting the probabilities of two types of errors, the fuzzy hypothesis test under lognormal distribution is studied with crisp data and fuzzy hypotheses.

在样本数据精确，统计假设模糊的情形，以控制出现两类错误的概率为目的，研究了对数正态分布下的模糊假设检验问题。

Under the assumption that a geometric process at the start point follows a lognormal distribution, the statistical inference problem for the geometric process is studied.

在假定几何过程的初始分布为对数正态分布的前提下，研究了几何过程的统计推断问题。

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。

Based on the importance of maintainability index demonstration for increasing cost-effectiveness ratio of weapon systems, a method of fuzzy maintainability index demonstration is offered for lognormal distribution.

基于维修性指标验证在提高武器系统费效比中的重要性，针对常用的对数正态分布，提出了一种模糊维修性指标验证方法。

OBJECTIVE The similar formulas were deduced that samples and standards were normal distribution and lognormal distribution.The software was programmed through VB software.

目的研究了样品、标准品的数据均符合正态分布、对数正态分布时的数理相似度计算公式并通过VB编程予以实现。

The paper introduces an algorithm to natural logarithm based on Maclaurin series.

基于麦克劳林级数公式计算自然对数，构造计算式向1逼近，从而加快级数的收敛速度。

The study of heterogeneous mapping algorithm based on the human eyes space-variant system. According to the "one-one mapping ring" and mapping direction we classify the mapping transformation into two sorts: forward algorithm and reverse algorithm. Based on the general rules of constructing this mapping model linear model and arctangent model are studied and verified.

本文基于人眼的空间分辨率可变视觉理念，研究了非均匀采样变换实现算法和非均匀采样变换的尺度轴转换与角度轴转换具有的"一一映射环"以及非均匀采样实现的两类转换：正向转换与逆向转换；在非均匀采样转换模型的基本构造规则基础上，讨论了区别于对数极坐标转换的线性非均匀采样模型及反正切非均匀采样模型的建立。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。