Investigation of the particle median diameter of hydrocyclone for separation of sediments from Yellow River's water;
黄河水泥沙分离用水力旋流器的溢流颗粒中位径分析
It is proved up to the hilt that the Baipao ccal coal-forming environment aremiddle moor.
研究结果进一步验证了潦浒白泡煤是以草本植物为主体的草本—木本植物组合体在中位沼泽环境中形成的推论。
Objective To investigate the difference, if any, between the real median values of serum AFP, β-HCG and uE3 (for prenatal screening of fetal chromosome abnormalities) in normal pregnant women during second trimester and the median values in the presentlyused american softwares as a primary step toward establishing local (national) reference standard value through collecting enough data.
目的:探讨本地区正常孕妇在孕中期时血清中三个检测项目的中位数值与目前采用的标准之间是否有差异,为建立本地区正常孕妇的中位数标准打下基础。
Analysis Median of Serum PAPP-A and Fβ-HCG in Pregnant Women at 9～13 Weeks;
孕妇妊娠9～13周时血清PAPP-A和Fβ-HCG的中位数分析
Formulation Approaching to the Median Position;
关于中位数位置和计算公式探讨
7mg/m 3 and the median was2.
7mg/m3;中位数为2。
Methods:Median age at diagnosis was calculated by sex and year of diagnosis,linear regression model was fitted for trend analysis.
方法 :利用天津市肿瘤登记处的肿瘤发病资料 ,分性别、年份计算发病中位年龄 ,并进行直线回归分析。