查询词典 optional sampling

chorion：绒膜,绒毛膜

chordate 脊索动物,脊索类 | chorion 绒膜,绒毛膜 | chorionic villus sampling 绒膜绒毛检验

chorion laeve：平 绒毛膜

choanal atresia 后鼻孔闭锁 | chorion laeve 平 绒毛膜 | chorionic villus sampling 绒毛取样

cleanliness limit：清洁度限值

取样部位 sampling location | 清洁度限值 cleanliness limit | 重量分析法 analysis by weight method

cluster wheat,club wheat：密穗小麦

"集体取样","cluster sampling" | "密穗小麦","cluster wheat,club wheat" | "离合器","clutch"

cluster point：聚点

clothoid 回旋曲线 | cluster point 聚点 | cluster sampling 分组抽样

cluster point of a sequence (net)：一(串网)序列的聚点;系列的聚点

"聚集;群落{统};聚落;部落","cluster" | "一(串网)序列的聚点;系列的聚点","cluster point of a sequence (net)" | "群落抽样[统]","cluster sampling"

Cluster sampling：整群抽样

(4) 整群抽样(cluster sampling) 此法是一种以包含若干个体的单位群为抽样对象的抽样方法. 其具体作法是:首先对所调查总体按需要划分成若干单位群,并对各群进行编号,然后用简单随机抽样法在总体中抽单位群来组成样本.

Cluster sampling：群集抽樣法

接下去应继续努力的在於各项经费、奖助学金的补助;打破课程性别区隔的现象,鼓励更多女性修习数学、科学相关学科在抽样的方法上,首先采立意群集抽样法(cluster sampling),分别在本省北部、中部、南部、东部抽取高级中学(离岛及纯男校除外),

Cluster sampling：群集抽样

6.群集抽样(Cluster Sampling)在本法抽样是以随机选出一群,一群为单位,不是个别单位. 群集抽样之优点简便易行,经济省事. 但是易产生抽样误差危险性很大. 分层之基础有赖抽样设计者之经验及判断. 理想上分层之数目愈多愈好. 因为层数愈多,

Simple cluster sampling：简单整群抽样

Significant figure,有效数字 | Simple cluster sampling,简单整群抽样 | Simple correlation,简单相关

phenol red：酚红,苯酚磺酞

phenol reagent 酚试剂 | phenol red 酚红,苯酚磺酞 | phenol red test 酚红排泌试验

accessory equipment：附件

accessory equipment 辅助设备 | accessory equipment 附件 | accessory part 附件