查询词典 coefficient of variation

By means of linear trend estimate, Morlet wavelet analysis and binomial coefficient smooth, the interdecadal variation characteristics of north polar vortex and spring precipitation in China are studied.

各季节极涡面积及强度均存在显著的年代际变化，在20世纪70年代中期之前有上升趋势，而后出现下降的趋势；但极涡面积总体上有显著的线性变小趋势。

Canonical correlation coefficient and principal component analysis of hormone contents in leaf and ovule at certain flowering period with some fiber straits were conducted by using 35 variation lines with same genetic background.

对具有同一遗传背景的35份变异材料，在特定生育时期，进行了叶片和胚珠内源激素含量与其纤维性状的典型相关和主成分分析。

Results indicate that each land cover type has uniform rule of backscatter coefficient variation in different time.

研究结果表明，虽然同种类型的地物在同一景雷达图像上的后向散射系数存在一定的差异，但是其后向散射系数随时间的变化规律却是一致的。

The analysis of molecular variance revealed that 93.85% of the variance component was attributable to the variation among individuals within ditches. Low levels of the genetic differentiation coefficient among ditches, G=0.172 and Nm=2.4, indicated that the ditches barely hinder gene flow between Scaevola populations. UPGMA cluster analysis and principal coordinate analysis revealed no major groupings among ditches or among plants.

经过分子变方分析显示海南草海桐有93.85％的变方成分存在於个体间；POPGENE分析结果显示其遗传分化系数G(下标 ST为0.172，而基因流为2.4，显示沟渠并无阻碍基因交流之能力；UPGMA归群分析及主座标分析结果显示海南草海桐个体间几乎无差别或差异很小。

According to the relation of the heat capacity, the thermal conductivity, the thermal expansion coefficient and the elastic modulus of the laser medium, the distribution and the variation of the temperature and the thermal stress in laser medium were got.

考虑热容值、热导率、热膨胀系数和弹性模量等与温度的关系，得到激光介质的温度分布和变化，以及热应力的分布和变化。

The concrete work and main contribution are as follows:(1) The index indicating transfer capability homogeneousness is defined, and the new terms like homogeneous grid, grid according with economic flow are put forward. These new concepts describe the degree in which transfer capability is utilized, and they provide the standard for ideal grid whose transfer capability and power generation dispatching economy are in phase. So, new idea is introduced in transfer capability analysis.(2) The multi-objective function with generation cost and transfer capability homogeneousness weighted is constructed. The relationship between system existing generation dispatching and transfer capability is revealed through comparative analysis between security economic dispatch and security homogeneous dispatch, and the variation rule analysis between generation cost and transfer capability homogeneousness with the change of weighting coefficient.(3) Example analyses demonstrate that the difference between specific power system with ideal instance can be identified effectively using the above concepts and method.

具体工作和贡献主要体现在：(1)定义了衡量电网输电能力均匀性分布的指标，提出均匀电网、符合经济流电网的新概念，以描述电网输电能力被利用的程度，并给出输电能力和发电调度经济性相协调的理想电网标准，在输电能力分析评判领域引入了新观点；(2)构造了发电费用与输电均匀性加权的多目标函数，通过对安全经济调度与安全均匀调度的对比分析，以及权系数变化过程中发电费用与输电均匀性的变化规律分析，揭示了系统现存发电调度与输电能力之间的依赖关系；(3)大量分析表明，利用上述概念和方法可有效识别系统在特定模式下与符合经济流电网的偏差程度。

The article defines the generalized variation coefficient and puts forward a new kind of grey incidence model. This kind of model reflects the positive and negative relation of grey incidence degree to some extent. It is only relate to the geometric shape of sequences and has nothing to do with the spatial position of theirs.

首先定义了广义变异系数，并提出一种新的关联度计算方法，该关联度能够反映序列的正相关与负相关关系，并且只与序列的形状有关，而与它们在空间的相对位置无关。

A reasonable simplified acceleration is developed, and by which variation of the motion response of the free-standing equipment with the kinetic friction coefficient and explosion seism parameters is obtained.

并根据其特点，提出了合理简化加速度波，采用该加速度波形，分析得到了浮放设备运动响应与动摩擦系数、爆炸地运动参数的关系。

In the study on the relationship between different grid sizes and variogram of the pupae, the variation in the range, the intensity of local spatial continuity and the sill was very low or non-existent when the grid size was 5m, 6m or 7m, the value of the decisive coefficient was more bigger when the grid size was 5m, so, it is ideal grid size.

对不同样方大小的变异曲线图进行比较得知：样方边长分别为5、6、7m时，变程、空间局部连续性强度和基台值的变化幅度均很小，几乎相等，而样方边长为5m时的决定系数较大，此样方为最适样方大小。

The range of Simple match coefficient was from 0.5877 to 0.9868 and the range of average was from 0.6732 to 0.7653,with the total average of 0.7237.The result indicated that the soybean population was with lower genetic variation.

品种间的遗传相似系数变化范围为0.5877～0.9868，平均值变化范围为0.6732～0.7653，总体平均值为0.7237，遗传相似系数较高，说明材料间遗传变异较小。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。