查询词典 variation coefficient

The dynamic characteristics of stochastic truss structures and stochastic frame structures are analyzed by using Random Factor Method. Then, from the expressions of structural random response of the frequency domain, the computational expressions of the mean value, variance and variation coefficient of the mean square value of the structural displacement and stress response under the stationary random excitation or non-stationary random excitation are developed by means of the random variable's functional moment method and the algebra synthesis method.

考虑压电智能桁架结构物理参数、几何参数、结构阻尼和外荷载、闭环系统控制电压分别或同时为随机变量，构建了结构在随机力作用下的动力响应分析模型，提出了求解方法，推导出结构动力响应随机变量的数字特征计算表达式，通过算例验证了所建模型和所提求解方法的正确性和有效性。

The variation coefficient of NUE is higher than that of NAE under the N fertilizer applications. It is also showed that the contribution of NUE to NE is higher than that of NAE in oilseed rape.

无论供氮水平如何，氮素利用效率的变异系数均大于氮素吸收效率的变异系数，说明氮素利用效率对油菜氮效率差异的贡献大于氮素吸收效率。

In order to determine the convergence of the line samplingbased reliability sensitivity method,the variance and the variation coefficient were derived for the reliability sensitivity estimation based on the line sampling.

为判别线抽样可靠性灵敏度分析的收敛性，推导了线抽样可靠性灵敏度估计量的方差和变异系数的计算公式，近似计算了线抽样可靠性灵敏度在给定置信度下的置信区间。

In order to determine the convergence of the line sampling -based reliability sensitivity method,the variance and the variation coefficient were derived for the reliability sensitivity estimation based on the line sampling .

为判别线抽样可靠性灵敏度分析的收敛性，推导了线抽样可靠性灵敏度估计量的方差和变异系数的计算公式，近似计算了线抽样可靠性灵敏度在给定置信度下的置信区间。

In order to compare the convergence of the importance sampling based reliability sensitivity analysis and Monte Carlo based reliability sensitivity analysis, the variance and variation coefficient of the reliability sensitivity assessment are derived in this contribution.

为了比较重要抽样与直接Monte Carlo方法在分析可靠性灵敏度时的收敛性，推导可靠性灵敏度估计量方差和变异系数的计算公式，近似计算重要抽样可靠性灵敏度估计量在给定置信度下的置信区间。

The faintest color of the bud color is yellow green. In addition, the variation-coefficient of some morphological traits is very low such as the cotyledon length, the cotyledon width, the cotyledon color, the silique length and so on. The Cluster analysis was based on the morphological data. When the genetic distance was 7.61, 21 accessions were clustered into 4 groups. The accessions of the group 1 had white petal, mezzo flower stalk and the earlier pick period, which is divided into two subgroup when the genetic distance was 5. 98. And the model was Ba39 and Ba35. The accessions in the group 2 had the very slender flower stalk and the middle pick period, that model was Ba27. The accessions of the group 3 had yellow petal, the thin flower stalk and the later pick period, that model was Ba43. The main characters of the group 4 were that it had the latest pick period and many leaves.

基于形态性状的聚类分析，在遗传距离7.61处，把21份芥蓝种质划分为4类，其中类群G1包括14份材料，其植株的生长势中等，株型较为一致，花瓣颜色均为白色，花薹粗细较为适中，平口时期较早，在遗传距离5.98处自然形成2个亚类，分别以Ba39和Ba35为代表；类群G2包括2份材料，即Ba27、Ba33，其植株的生长势较弱，花薹很细，平口时期相对居中，代表材料为Ba27；类群G3包括4份材料，即Ba05、Ba09、Ba38、Ba43，其植株的生长势较弱，子叶颜色、叶柄颜色、花茎颜色、花蕾颜色均为黄绿色，花瓣颜色为黄色，花薹较细，平口时期较晚，代表材料为Ba43；类群G4包括1份材料，即Ba41，其植株的生长势较强，平口时期很晚，并且叶片数很多。

To define the spatial distribution pattern of point objects, a new approach is introduced, which employs the variation coefficient CV of the area of Voronoi polygons.

：点集的Voronoi图是对点集的一种空间分割方式，不同分布的点集可以形成Voronoi多边形面积的不同变化，可以通过计算点状目标的Voronoi多边形面积的变异系数方法，来分析点状目标的空间分布特征。

New socialism countryside; evaluation index system; AHP; variation coefficient method; fuzzy evaluation method

社会主义新农村；评价指标体系；层次分析法；变异系数法；模糊评价法

The WBChE and EChE are correlated with the severity of AOPP,and can be used as a clinical indicator The variation coefficient of PChE is big,and can not reflect the severity and clinical changes of AOPP.

全血、红细胞ChE变化与AOPP临床中毒程度及其病情变化呈正相关，可作为临床观察有效指标。血浆ChE变异系数大，不能准确反映AOPP临床中毒程度及其病情变化。

Abnormity sampling method was adopted and there was 128 sampling points in this field.The statistical laws of soil pH,organic matter,total phosphorus,total nitrogen,alkaline hydrolyzable nitrogen,available potassium and available phosphorus were analyzed, and the results indicated that the variation coefficient of soil nutrients was between 6.3% and 356.1%,pH was 5.3%.Using the geostatistica...

以土壤的pH、有机质、全磷、全氮、碱解氮、速效钾和速效磷含量为研究对象，研究其相应的统计规律，结果表明土壤各养分属性的变异系数在6.3%~35.61%之间，pH为5.3%；采用地统计的半方差函数分析，发现有机质，全氮，碱解氮和速效钾在一定范围内存在空间相关性；采用克立格方法进行最优内插，绘制了养分含量分布图，并对其空间变异进行了初步分析。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。