sampling

Methods To collect data by cluster sampling and analyze data by polychotomous Logistic regression.

方法采用整群样调查搜集资料,采用多分类回归分筛选影响因素。

Conduct operation including sampling, mounting, polishing, etching, microscope inspection, hardness testing, NDT testing (magnaflux particles, ultrasonic etc).

协助工程师进行材料测试,报告以及分.

To avoid sampling bias, they restricted their analysis to one group of animals—the bivalve molluscs—that fossilise well.

为了防止取样的偏颇，他们将分的对象限制在一类化石记录保存完备动物——双壳类软体动物。

Active carbon tube adsorption were used for sampling of methacrylonitrile, then thermal desorption analysis was performed by GC(FID).

活性碳管吸附空基丙烯腈,热解吸后相色谱(FID)测定。

Based on screening and sampling,properties of trass and trass concrete in Ximeng area of Inner Mongolia was studied.

通过筛分选样,对内蒙古锡盟地区大量蕴藏的火山渣及火山渣混凝土进行了材料性能实验研究。

It is calculated as half of the value of the sampling rate.Passing this level causes aliasing distortion, or foldover.

它的计算方法是将采样率除以二，超过这个数值将会导致折叠失真，或称折叠。

This paper presents a sampling and collecting high speed cloud echo data method using a monolithic processor for laser ceilometer.

本文介绍了激光测云仪用单片机实现云体回波信号高速数据采集的方法。

In sampling, we choose a small number of items which we think are typical of the whole and examine the sample.

在采样时, 我们选择少量我们认为是代表整体的东西, 并对这个样本进行研究。

The error estimation of the quasi-synchronous sampling harmonics anal-ysis and the method used for measuring the subharmonics of periodic signalsare also discussed.

文还对测量误差作了分和估计,并介绍了测量分数次谐波的一种方法。

This bead fusion method is a perfect sampling method for ICP, AA, as well as for indissolvable samples in wet chemical analysis.

对于ICP、AA和湿法化学分手段，对于难溶样品，熔融方法同样是一种非常完美的制样手段。

The malignant mesenchymoma is not rare actully,but owing to the one sidedness of sampling,it is always diagnosed pathomorphogically as one singletissue sarcoma.

恶性间叶瘤并不少见，但由于病例取材局限，每把此肿瘤诊断成一种组织的肉瘤。

A combustion-driven entrained flow reactor equipped with an optical particle-sizing pyrometry diagnostic and a rapid-quench sampling probe has been used for this investigation.

这里使用的试带有光学测温元件和快速淬火取样探针的流床反应器。

Program goals include teaching the sharks to swim into a shallow stretcher and remain calm for medical exams, morphometrics, and eventually diagnostic sampling.

计划的目的包括训练鲸鲨游入近水面的运送架，并在医护检查、体形测量和取化验样本期间保持安静。

Superpopulation model is a bridge between survey sampling and other branches of statistics.It is helpful to study sampling theory with the tool of superpopulation models.

摘要超总体模型是样理论与统计学其它分支联系的桥梁，借助于超总体模型研究样理论是一个有前途的方法。

Via examining, have 40 kinds eligibly, sampling percent of pass is 58.8% , among them 10 kinds belong to the product with quality serious problem.

经检验，合格的有40种，样合格率为58.8%，其有10种属于质量问题严重的产品。

In this survey, we take cosmetician as our sampling group and design a series of the questionnaires to know their acceptance of the information technology.

文摘要美容医学诊疗产业是一个以带动人类健康为目的之产业。

The flow model of single phase flow in the elbow of the vertical tubular leacher was studied by using NaCl solution tracing and microcomputer sampling.

用盐水示踪、微机采样来研究垂直管道浸取器回弯头内单相流的流动模型。

Indicate epidemiology investigation , confirm on the grounds of international sampling investigation, major part in the cancerogenic patient who has a smoke is a passive smoker.

流行病学调查表明，据国际性的样调查证实，吸烟致癌患者的大部分是被动吸烟者。

Nasal cannulae are now aailable with a separate tube that can be attached to the sampling probe from a capnograph, thereby allowing for end-tidal CO2 monitoring.

鼻导管可以单独连接到二氧化碳分仪上采样，行呼末二氧化碳监测。