变化系数

Based on the routine quality monitoring data of 2004 from the section of Baifa and Baise ,the present situation of water quality in Baise reach of Youjiang river is evaluated by the method of single factor pollution index, and we draw a conclusion through the trend analysis of water conditions from 1999 to 2004 using Spearman's rank correlation coefficient method.

根据百法、百色断面2004年常规水质监测资料，采用单因子污染指数法对右江百色城河段的水质现状进行分析评价，并根据该河段1999年至2004年的监测资料，利用Spearman秩相关系数法进行水质变化趋势分析。

The induced changes in log mesopic contrast sensitivity showed significant negative correlation with the changes in third-order (r =-0.490, P =.0013 without glare; r =-0.362, P =.0177 with glare; Spearman rank correlation coefficient) and fourth-order root mean square (r =-0.586, P =.0001 and r =-0.306, P =.0450, respectively).

中间视力对比敏感度log值的变化与三阶像差(r =-0.490， P =。0013 无眩光； r =-0.362， P =。0177 ，有眩光； Spearman 等级相关系数)和四阶像差(r =-0.586， P =。0001无眩光；； r =-0.306， P =。0450有眩光，)的均方根呈显著负相关。

By use of continuous dynamic materials a quantitative analysis is conducted on the rareness of land supplies, correlation between land supplies and economic development, flexibility coefficient of land use, and contribution rate of land supplies to economic growth.

中文摘要：利用连续的动态资料，对深圳土地供给稀缺性、土地供给与经济发展的相关性、土地利用弹性系数、土地供给对经济增长贡献率及其变化进行了定量分析。

However, by modifying the reaeration coefficient, a good calculation result has been obtained. Similarly, the changing rule of COD can be monitored clearly, which may also provide scientific evidence to further understand the rules of pollution ejection and sediment motion.

经研究表明：考虑波动效应后，对复氧系数进行修正能得到较好的模型计算结果；同时，COD变化规律不仅可以弄清楚，而且可以为进一步研究排污规律和泥沙运动提供科学依据。

The red shift of exciton energies andthe variation of absorption coefficients in different electrical field are calculated.

在此基础上，计算了不同电场条件下激子能量的红移，以及吸收系数的变化。

At the same time the regression model of conversion coefficient is given using different meteorological factors.

利用1957-2001年全国472个测站小型蒸发器的实测资料及水面蒸发量的理论计算值，对比分析了两者折算系数的分布规律及45a来的年际变化，，同时利用各气象要素建立了回归模型。

A regression line Is as follows:Y=a+bX with the coefficient of correlation and the variability of results .

解： 。但是未必一定如此，端看样本值的变化，如果平均数接近且两组混合后反而接近一直线，此时相关系数变大。

How to give out the friction factor and the regular pattern is the importance of researching the prestressed loss in the long steel rope.

如何合理地给出摩阻损失系数或找出其变化规律，成为长索预应力损失估计的研究重点。

Since in some instance, the variance of response variable might be changeable along withthe alteration of explanatory variable, in the procedure of model constructing, a fixedeffects model should be considered firstly, then the random effects model or randomcoefficient model when necessary. The best fit model should be chosen by comparing thealterations of between-study variance and residual variance, as well as their relationshipswith covariates.

基于各研究中因变量与自变量间的曲线形状可能存在较大差异，建模时可依次考虑固定效应模型、随机效应模型和带协变量的随机系数模型，并观察研究水平的方差与残差方差的变化，以及与协变量的关系，从而选择最优模型。

Using the properties of base solution vectors of the linear restriction equations, a condition to maintain the same discriminant result between the sampled observations of changed and unchanged was obtained: the disturbed row vector of sampled observations was satisfied all linear equations whose coefficients were the base solution vectors of linear restriction equations.

利用约束条件方程组基础解向量的性质得出了使数据变化前后的判别分类结果保持不变的条件：数据扰动行向量必须满足所有以约束条件方程组的基础解向量为系数的线性方程组。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。