一般来说，跟踪研究会有受访者群组，固定样本追踪研究是贯时性的研究。
In general, longitudinal studies involve panels of respondents and panel studies are longitudinal studies.
这就是为什么我那么热衷于comScore混合了固定样本数据和像素数据跟踪的综合方法。
And that is why I am so enthusiastic about comScore's hybrid approach of marrying panel data and tracking pixel data.
（2007年7月31日下午）当时他们（研究人员）在附近徘徊，希望从她（指那只奇特的海豚）身上获取活组织检查样本。这只海豚先是潜到水里，过了一会嘴上固定着一只海螺浮出水面，她在水上面来回挥舞着海螺。
As they lingered nearby, hoping to dart a biopsy sample from her skin, the dolphin dived and then surfaced with her beak lodged in a conch shell, which she waved back and forth above the water.
在18件样本上检测了氧和锶的同位素。这两种元素在牙齿成型时，会固定在牙釉质上。
Oxygen and strontium isotopes, which are fixed in dental enamel at the time of tooth formation, were tested in 18 subjects.
居民调查则是基于60000住户这么一个更小的样本，这个统计得出的数据很不固定，而且从来都不尽兴任何修正。
The household survey is based on a much smaller sample of 60,000 households which is volatile and never revised.
每个样本均采用循环轴向荷载以至固定失效来测定其轴向刚度和抗扭刚度。
Each specimen underwent axial and torsional stiffness testing along with cyclic axial loading to failure.
本文以同时发行A股和H股的16家双重上市公司为样本，利用固定效应模型对H股折价率作了实证分析。
This paper makes a pragmatic study on discount rate of H share, taking 16 dual listing corporations on A and H share market as samples by means of the fixed effect model.
通过相隔固定的帧差值阅值化得到背景样本值，并采用高斯核密度估计方法计算背景灰度的概率密度函数。
The background samples are chosen by thresholding inter-frame differences, and the Gaussian kernel density estimation is used to estimate the probability density function of background intensity.
方法：样本包括经历孤立的后路脊椎融合和器械固定的青少年特发性侧凸病人。
Methods. The sample consisted of patients with AIS who underwent isolated posterior spinal fusion and instrumentation.
功率谱减法是一种传统的降噪方法。 但是功率谱减法采用固定的无音片段作为噪声样本容易引起误差。
Power spectral subtraction is a traditional method for decreasing noise which easily leads to error by regard fixed silence fragment as noise sample.
样本的血液是在进行第二次金属内固定时候抽取的。
Samples of blood collected during surgery were filtered using 2 ICS devices.
鉴别在野外带回的生物样本，并且研究各种生物的适应方法(摄食、呼吸、运动、固定、抵御捕食者等)。
Study the living organisms you brought back from the field. Notice especially their adaptive features - nutrition, respiration, locomotion, attachment and defence against predators.
从上可以看出，对于固定数量的样本，调节取样率会影响一个样本的音长。
As can be seen above, the ability to adjust the sample rate affects the length of a sample for a given number of samples.
方法制作内凹齿钥匙正常开锁和被钥匙机复制后的样本，用光学显微镜拍照固定痕迹特征。
Method Samples of manipulated keys and keys that used as guide in a duplication process are made. Marks and striations on the keys are photographed and analyzed by light microscopy.
在所述托盘(1)的同一半径上、对应于每个试剂瓶卡座(21)的外侧，设置有样本试管固定组件。
A sample test tube fixing member is disposed in the same radius of the tray (1) and correspondent to the outer side of each reagent bottle clamp bases (21).
在所述托盘(1)的同一半径上、对应于每个试剂瓶卡座(21)的外侧，设置有样本试管固定组件。
A sample test tube fixing member is disposed in the same radius of the tray (1) and correspondent to the outer side of each reagent bottle clamp bases (21).
应用推荐