Rain rate accumulative log-normal and Gamma distributions are calculated from 1991's hourly rain gauge data for 333-gauge stations of China. By comparison, it shows that the Gamma distribution depicts are better than the statistic rain rate distribution. 利用1991年中国333个地面雨量站的小时雨士数据,进行降雨率累积概率对数正态和伽场分布的计算比较,得出伽玛分布在较大的降雨范围内能更好地反映实际降雨率累积概率分布。
Vc and soluble solid material contents of flesh. diameter of flower and length of leaf, conformed to the normal distribution. However, those of fruit weight, edible rate of fruit and length of bearing branchlet looked rather like X2 distribution. 据分布函数的X2检验,果实制干率、生育期、Vc和固形物含量及花径和叶长遵从正态分布,而单果重、可食率和枣吊长度呈近似X2分布。
On the basis of that, deterministic equivalent model of probable investment model was set up, and it was found that the new model concludes case of normal distribution return rate. 在此基础上,得到了概率证券组合投资模型的确定性等价模型,并指出新的模型实际上包含了收益率为正态分布的情况。
In this paper, it is the first to discuss the normal approximation rate of the error distribution of nearest neighbor-kernel estimator for the conditional density. Secondly, the random weighting statistics is introduced, and the random weighting approximation rate is obtaned under suitable conditions. 本文首先研究了条件密度函数近邻&核估计的误差分布的正态逼近精度,然后利用随机加权法构造了近邻-核估计的随机加权统计量,获得了随机加权逼近精度。
The results indicated that the adults 'population presented normal distribution from the estimation of deviation; the dispersal rate decreased with releasing time. 研究结果表明:按偏离度的估计,扩散后种群呈正态分布:扩散速率随释放时间呈指数式下降;
The result indicated that neither the daily nor weekly returns rate of the two indices obey normal distribution, but the returns rate of month obeys it sometimes. 结果表明,两种指数的日收益率和周收益率不服从正态分布,而月收益率在一定的阶段表现出正态特性。
Four shares in the Chinese A stock market were selected and, with the assumption of a normal distribution of the returns, the daily portfolio allocations and the rate of borrowing and lending were obtained. The sensitivity of the model parameters are also discussed in this paper. 选取中国A股市场的4只股票,在收益率服从正态分布的假定下,确定投资组合中的资产配置以及借贷比率,并且讨论了模型参数的敏感性。
And according with normal distribution of internal phase droplet, a function on applied electric field was deducted. The demulsification rate under a given electric field intensity can be expressed by this function. 结合乳状液内相水滴的正态分布情况推导出一个关于外加电场强度的函数,这个函数表达了给定电场强度下的破乳率。