Currently , only 3 % of the students in america ' s top colleges come from families in the lowest income quartile and only 10 % from the bottom half , according to a study by anthony carnevale and stephen rose for the century foundation 根据安东尼?卡内瓦和斯蒂芬?罗斯的一项“世纪基金”研究，目前美国顶尖大学的学生中仅有大约3 %来自低收入家庭，而且仅有10 %来自中等收入以下的家庭。
Those achievements are reflected in rankings by national periodicals such as u . s . news and world report , which consistently ranks tulane in the top quartile of major universities and among the top 15 institutions in educational value 正是由于这些因素，在历年的美国新闻组us n和世界报道杂志w的全美大学综合排名中，图兰大学始终跻身于前30名，其教育质量排名更是在前15名之列。
Comparing the highest and lowest quartiles of carotid intima - media thickness , the researchers found that the relatie risk of atrial fibrillation , after adjusting for all potential confounding factors , was 1 . 90 oerall , which broke down to 1 . 61 in men and 2 . 14 in women 比较颈动脉内中膜厚度的最大和最小的四分位数，学者发现针对所有潜在的混杂致病因素进行调整后，房颤的相对风险总的来说为1 . 90 ，分为1 . 61 （男性）和2 . 14 （女性） 。
Data processing is performed by pc ， which includes detecting rough error by quartile method base on first order differential , adopting three points algorithm to eliminate deviations of rack displacement and installation , applying minimum containing area method to evaluate the sectional plane radius of roller and realizing it by genetic algorithm , adopting akima method to fit curve of roll profile 主要的数据处理工作在上位机进行，采用基于差分法的分位数算法剔除粗大误差；采用三点式测量原理消除探头的安装及运动所产生的误差；采用最小包容区域法评定轧辊半径，并应用遗传算法实现最小包容区域法的寻优计算；采用阿克玛插值方法进行辊型的曲线拟合。
Because the boundaries between the age and income categories are the respective quartiles for duplicate readership , the negative correlation coefficients also imply that the young and the affluent , as groups , tend to avail themselves of a larger pool of magazines than readers in the other demographic categories 由于年龄组与收入组之间的界线为双料读者群各自的四分位数，因此，相关系数为负数也意味着，同其他人群相比，年轻读者群与富有读者群倾向于占有更多的杂志。
This dissertation focuses on the application of data fusion in two - phase flow regime identification . following is the main contribution of the dissertation . 1 ) based on quartile and first order differential , a new outlier detection algorithm is presented , experiments show that the method combining with low pass filter can remove gross error and unwanted frequency components 本文的主要工作与创新点在于： 1 )将分位数方法与一阶差分法相结合，提出了一种基于一阶差分的粗差剔除方法，该方法与低通滤波器的结合可以有效去除两相流压力波动信号中的粗大误差以及信号频带以外的频率成分。
However , the definition of female androgen deficiency , as recently provided by the princeton consensus statement , is not precise enough and may lead to over - diagnosis due to the high prevalence of its diagnostic criteria : androgen levels below or within the lower quartile of the normal range and concurrent * * * ual dysfunction 可是，妇女雄激素缺乏的定义并不足够精确，而且它通用的诊断标准（雄激素水平低于或等于正常范围的低限，且并发性功能障碍）可能会导致过度诊断。
