查询词典 coefficient of variation

The varying tendencies of partition coefficients of some compounds in aqueous or nonaqueous solvent systems by calculating the phase equilibria with universal quasichemical functional group activity coefficient model are predicted. These compounds included saturated and unsaturated fatty acids ethyl esters,N2,4dinitrophenylamino alcohols, pnitrophenyl glucosides and so on, with simple structures and much differences in polarity.

以饱和及不饱和脂肪酸乙酯、2，4二硝基苯胺基脂肪醇和对硝基苯基葡萄糖甙等结构较为简单、极性差别较大的溶质系列为研究对象，应用修正的通用基团活度系数模型，通过相平衡计算，预测了它们在含水或不含水的溶剂体系中分配系数的变化趋势，并与前人的工作进行了对比。

The paper includes:The author calculate the structures inner force and displacement of the free end , analyze the influence of the height and the value of pretress of cable by making use of ANSYS 9.0 soft, pose the concept of critical prestress,conclude the function relation between displacement of the free end, initial strain and the height of cable ,analyze the dynamic properity and point out that Newmark-β method should be adopted when we analyze the dynamic properity of the cable-stayed spatial structure with direct integral test to guarantee the contribution of high mode,finally conclude the functional relation among coefficient of earthquake inner force, initial strain and the height of cable, wish to get some helpful conclusion applied to cable-stayed spatial truss design.

本文系统介绍了斜拉空间桁架竖向地震反应的分析理论与方法、详细分析了斜拉空间桁架结构在静力和竖向地震作用下的受力性能，主要内容包括：利用通用有限元软件ANSYS9.0计算了斜拉空间桁架在静力和竖向地震作用下内力及自由端位移分布规律并得出地震内力系数与节间位置、预应力以及斜拉索高度之间的函数关系；详细分析了斜拉索中施加的预应力以及斜拉索高度的变化对于该种结构内力及自由端位移的影响并提出了斜拉空间桁架的临界预应变概念，进而得到了自由端位移与初始预应变以及斜拉索高度的函数关系，即：△=-(40h+2180)ε+9.8；分析了该种结构的动力性能，并指出：在时域内采用直接积分法计算该种结构的动力响应时，应该考虑采用不引起振幅率减小的Newmark-β法，以保证高阶模态响应的贡献仍然保留在响应中而不致于被忽略。

This is a group of reflection coefficient on the material test data and documents.

详细说明：这是一组关于材料反射系数测试的数据和文档。

So the aim of this paper is to prove coefficient of h-polynomial of group H_3 and H_4 is nonnegative.

本文的目标就是要证明群H_3，H_4的h多项式的系数非负。

Second the power coefficient of the group multiple layers multiple goals is investigated and the method of the point estimation method is improved.

其次，在研究群体多层次多目标决策支持中的权系数问题时，改进并实现了群体多目标权系数的点估计方法。

Results The average coefficient of gray scale in group E was1.6and there were obvious discrepancy while comparingwith3.3in group C.

结果 实验组患者的平均灰度比为1.6，而对照组患者的平均比为3.3，两者相比差异有显著性。

Methods Focus group discussion,nominal group discussion and coefficient of concordance were used to determine the monitoring indexes.

方法应用专题组讨论、选题组讨论方法并运用和谐系数指标等统计学方法判定监测指标。

The power coefficient of the group multi-layer decision support system is investigated. Considering the factor of the group, the point estimation way is improved and realized.

3研究了群体多层决策支持系统中的权系数问题，讨论了复杂工业过程决策支持系统多目标分层的必要性，考虑到群体因素的作用，改进并实现了群体多目标权系数的点估计方法。

The effect of Longbishu's raw material drug produced with new technology and that with old technology on wet and dry weight coefficient of different group.

如何增强疗效、提高药品的利用率、改进工艺、降低成本、减少不良反应、降低患者的经济负担，是当前临床用药需要考虑的重要因素[3] 。

In this paper, the distribution curve and coefficient of group with sequenced character were employed to compare the medical expenditure distribution between two historical times in sampled areas.

本文运用有序特征群体分布曲线和系数比较分析了两个历史时点样本地区人群医疗费用的分布。

Salt is good, but if the salt becomes flat and tasteless, with what do you season it?

14：33 盐本是好的，盐若失了味，可用什么叫它再咸呢？

He reiterated that the PLA is an army of the people under the leadership of the Communist Party of China.

他重申，人民解放军是在中国共产党领导下的人民军队。