proportional sampling

1. In general, three factors are directly proportional to and most influential on the price: the communication bus, the sampling rate, and the number of analog I/ O channels.
   通常，通信总线，采样率，模拟I/O通道数这三个因素最具价格影响力且与价格成正比。
2. The square of coloring development length of the tube was directly proportional to the product of the nitrogen dioxide concentration and sampling time.
   根据时间和显色长度可求出环境中二氧化氮的浓度。
3. Probability proportional to size sampling
   概率比例规模抽样法
4. Methods After 30 experimental spots were selected in Guangdong coastal areas and the Pearl river delta by population proportional probability sampling method, 1293 school aged children ( age 8 ￣ 10y) were conducted thyroid monitoring, urinary iodine and iodined salt measurement.
   方法用人口比例概率抽样法对该地区抽取30个调查点1293名8～10岁在学儿童进行甲状腺肿大率、尿碘、盐碘调查；
5. Measurement of pesticide contamination on the body surface of sprayers through regional and proportional sampling strategy
   区域比例取样测定全身体表农药污染总量
6. High proportional sampling audit to budget unit price;
   对预算单价的套用进行高比例抽样审计；
7. Analyses show that the optimal strategy is actually a feedback control by giving predicted miss as error signal. It is also a modified proportional navigation guidance law. Its ideal motion at each sampling instant is approximately the well-known constant bearing course.
   分析表明，最优策略实质上是以零控脱靶作为误差信号的反馈控制，在每一采样时刻近似地以平行接近法作为理想运动状态，是一种修正的比例导引方法。
8. PPS ( probability proportional to size cluster sampling) and random cluster sampling methods were used for the investigation.
   [方法]采用PPS抽样法和随机整群抽样法调查。
9. Methods The methods of retrospective survey and Probability Proportional sampling ( PPS) were used in the investigation of NT Mortality rate, the inoculation rate of tetanus toxoid ( TT) in the women of child-bearing age, antibody lavel;
   方法用回顾性和PPS调查方法调查NT死亡率、育龄妇女TT接种率、抗体水平；
10. Methods The multi stratified grouping random sampling method and the proportional sampling was used.
    方法本次流调方法与全国第四次流调方法基本一致，采用分层整群等比例随机抽样方法。
11. The simulated results show that random period control technique has better control results compared with proportional period control method in larger sampling period.
    仿真结果表明：在大的采样周期情况下，随机周期控制较比例周期控制具有更好的控制效果。
12. Fourier transform is the elementary method for the analysis of harmonics, which mainly disadvantage is that it exists the spectral leakage and fence effect, its frequency resolution is inversely proportional to the sample data length in asynchronous sampling.
    傅立叶变换是最基本的谐波分析方法，其主要缺点是在非同步采样时存在频谱泄露和栅栏效应，并且频率分辨率与采样数据长度成反比。

noun

1. the population is divided into subpopulations (strata) and random samples are taken of each stratum

   Synonym:    stratified samplingrepresentative sampling