1) variation coefficient Cv
变差系数Cv
2) coefficient of variation (CV%)
条干的变异系数CV%值
3) flow coefficient Cv
流量系数Cv
4) variation coefficient
变差系数
1.
The optimum design example shows that the variation coefficient of load torque acting on cutting head is decreased 13.
优化设计实例表明,截割头的负载转矩变差系数减小了13。
2.
The Analysis shows that the bigger the variation coefficient of dependent variable,the bigger the mean square error of regression equation when the multiple correlation coefficient(or correlation coefficient) is definite.
分析表明,复相关系数(或相关系数)一定时,倚变量的变差系数越大,回归方程的均方误差就越大;回归分析时,应对回归方程的误差进行分析。
3.
Mathematical expectation,variation coefficient and probability density function were analyzed or simulated to investigate the variation trend and characteristics of daily precipitation in the area.
利用重庆地区4个气象台站(沙坪坝、开县、万州、酉阳)1961～2000年的40 a观测资料,通过计算、拟合日降水的数学期望、变差系数及分布函数,对重庆地区日降水变化趋势及变化特征进行分析,从而进一步了解重庆气候变化情况。
5) coefficient of variation
变差系数
1.
Through the histogram method and Kolmogorov test,it was obtained that the sensitivity coefficient of variation for D6-2 artillery primer and mechanical explosive devices approximated the normal distribution of(0.
变差系数是进行火工品可靠性设计的重要参数之一。
2.
The results show that the rainfall isogram in the area of Beijing has been densified by the urbanization, and then the annual rainfall has been increased as well; which makes the change of the coefficient of variation of urban rainfall is larger than those of the suburbs.
分析表明,城市化使北京地区降雨量等值线加密、年雨量增加,使城区雨量变差系数变化大于郊区。
3.
Based on the date of Chaohu river network of waterways area 8 survey station of many year materials,The relations between,its flood peak and the year of the largest flood runoff one day is established,its corresponding coefficient of variation Cv value is calculated and the distribution rule and origin of the Cv value is analyzed.
通过对巢湖水系河网区8个测站多年资料,建立其洪峰与年最大一日洪量关系,计算其对应变差系数Cv值。
6) difference of variation coefficient
变异系数差
1.
By applying multiple central limit theorem,it′s proved that difference of variation coefficient of two normal distribution is asymotic normality.
利用多元中心极限定理,证明了两个正态分布变异系数差具有渐近正态性,从而给出了一种新的检验两个正态总体变异系数差异的方法。
补充资料：变差系数
变差系数：当两个方案的期望效益不同时，直接用标准差就不好比较了，此时就要用变差系数来测定它们的相对风险。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条