Objective the aim of this study was to compare the differences in sampling methods of ct perfusion for soft tissue neoplasms in the head and neck regions.

目的研究不同ct灌注采样方法对头颈部软组织肿块性病变评价的影响。

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Factors influencing the tensile strength of polymerizer head sample were introduced, which included the sampling position, sampling direction, sampling quantity and the cross section shape of sample.

介绍了影响聚合釜封头试样拉伸性能的因素：取样部位、取样方向和取样数量及试样的横截面形状。

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To realize a true balance sampling receiver and resolve the pulse leakage of template signal in former receivers, a novel sampling-head is proposed.

为实现一种真正平衡的采样接收机，并解决以往接收机存在的采样模板脉冲泄漏问题，设计了一种新的平衡采样头。

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Republicans spent much of the 1997 appropriations season battling the administration over its plan to use statistical sampling, a technique that uses data from the traditional head count to estimate the number of those who did not respond to census takers.

CNN: By Juliana Gruenwald, CQ Staff Writer

The rover will spend the rest of the spring drilling and sampling the site, in search of organic compounds, then head for higher ground.

NEWYORKER: The Martian Chroniclers

The reason for this seemingly dotty result is that the errors from scientific sampling are easier to quantify (and minimise) than those arising from an imperfect head-count.

ECONOMIST: Statistics