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- A type of probability sample in which aggregations of sampling units, called clusters, are sampled at some stage in the process. 是一种将样本单元聚集在一起的随机抽样法。样本群在抽样的某一步骤被抽出。
- Multistage sampling in forest inventory is not restricted to fixed-area sampling units. 森林资源清查中，多阶抽样并不局限于固定面积的抽样单元。
- Also,the second sampling units and unit number and the shortcoming of jackknife were discussed. 另外，对二重样本单元和单元数的确定以及刀切法的局限性进行了讨论。
- variance between primary sample units 初级抽样单位间的方差
- variance within primary sample units 初级抽样单位内的方差
- Every sampling unit can be certain length, also can be unit of particular area, bulk or cubage, quality or quantum of time. 每个取样单位可以是一定长度，也可以是一定面积、体积或容积、质量单位或时间单位等。
- The host computer and sampling units were separated electrically by adding photocoupler circuits to RS 485 bus interfaces. 由于在RS-485总线上加入了光电隔离电路，主计算机和各个数据采集单元电气上完全隔离。
- Sample Unit of Vanko Municipal Scene/ 万科城市风景示范单位/
- The Sample Unit of Creative Dream Garden/ 缔梦园样板房/
- Antijamming Method for Pulse Per Second Signal in Synchronized Sampling Unit Based on GPS.Automation of Electric Power Systems,2000,24(1):45-47. GPS同步采样装置中防止干扰GPS脉冲信号的措施.;电力系统自动化;2000;24(1):45-47
- What I need is nothing but a sample. 我需要的不过是一件样品而已。
- The luminous intensity on unit area. 单位面积上的发光强度。
- The nurse took a sample of my blood for tests. 护士抽了我的血样去化验。
- Airmail revised price list but full range sample within fortnight. 航空寄上订正价格表，全套样品两周内寄出。
- She was experimenting in selected units. 她在试点单位进行试验。
- His job is to sample products for defects. 他的工作是抽样检查产品的瑕疵。
- The emphasis is on the principles and composition of C8051F020 processor module,as well as the design of the analog dada sampling unit,the import and exit unit,the man-computer interface unit and the communication unit. 重点介绍了装置的C8051F020处理器模块的原理及构成,以及模拟量采集、开入开出、人机接口、通信等模块的设计。
- He sent me a sample copy of the book. 他寄给我一本样书。
- The family is the smallest social unit. 家庭是社会最小的单位。
- Pressure is force per unit area. 压力就是电单位面积上的力。
