查询词典 systematic sample

B: Choose a pair of sample containers with bottle lids wrapped in plastics and see the numbers on the sample bottles and lids and pour 50ml of urine from the cup into bottle A, the rest 25ml into bottle B for retest in case bottle A is in doubt.

挑选一套样品容器，看清楚两个样品瓶子和瓶子盖上的号码。从杯中倒50毫升尿样到A瓶中。如果A瓶有问题的话，余下的25毫升倒入B瓶中，供重复实验。

Chi-square test has been used to measure significant difference in advertising cultural values between 1991-1992 sample and 2002-2003 sample.

在本研究中，还发现不同的产品倾向于使用特定的文化价值。

The main influence factors to shear strength test result was systenatically studied by the contrast test,including test machine,shear clamp,distance between shear blade edge,clearance fit between test sample and shear hole,shear rate,effect of machining on sample's outer surface.

通过对比试验，全面系统地研究了剪切强度的主要影响因素：试验设备、剪切夹具、刀口间隙、试样与剪切孔间隙、剪切速度以及试样的表面机加工对钛合金丝材剪切强度的定量影响。

Numerical simulations by assemblies of circular panicles can qualitatively reflect the general characteristics of liquefaction behavior of sand. The interval effect of aspect ratio of elliptical panicle on the mechanical behavior of numerical sample is obtained, and the reason is related to the initial average co-ordination number. The regularity of evolution of fabric in the process of sand liquefaction under cyclic loading can be qualitatively achieved by using the numerical sample randomly mixed of panicles with different shapes. Numerical simulations can not only demonstrate the macro phenomenon of particle breakage, mostly importantly, it can also expose the evolution of particle breakage microscopically, and would contribute to further research of the micromechanics of particle breakage.

研究结果表明：Hertz-Mindlin非线性接触模型适用于变围压条件下砂土力学性质模拟；纯圆颗粒模拟能够定性地反映饱和砂土振动液化的一般规律；颗粒长短比变化对砂土力学性质的影响具有区间效应，其原因与粒间初始平均接触数有关；不同形状随机混合试样能够从定性规律上反映振动液化过程中砂土的细观组构演化规律；数值模拟不仅可得到颗粒破碎宏观响应，而且可以分析内部接触力变化和实现对粘结破裂位置的追踪，从而可进一步研究颗粒破碎细观力学机制。

The corrosion resistance of the SMAT sample is lower than that of the original coarse-grained sample.

因为316L不锈钢表面纳米晶组织容易钝化，形成的钝化膜不稳定，提高了溶解速度。

The sample's preparation and examines to include the scene gathering the suspicious spot sample (cotton yarn, lint ball and so on) to soak with the distilled water.

将现场采集的含有可疑斑点的样本用蒸馏水浸泡。

We classified the forest fuel and studied the fuel spatial distribution based on forest inventory and sample plots. Vertical and horizontal distribution of fuel is calculated from sample plots and tree biomass equation. Based on fuel distribution, wind simulation and DEM, fire intensity and effective shaded fuelbreak width are calculated under the condition of crown fire occurrence.

根据历史气象数据确定当地平均最大风速平均值为3.6m/s，平均最大风速的最大值为14m/s，在此情景下，结合DEM数据和可燃物数据对研究区域的林火强度进行计算，并对防火林带的有效参数进行确定。

By analyzing the transverse force of test sample, a general formula has been established between the sample's deflection angle and its Young's modulus.

中文摘要：通过对测试试件的横向受力分析，建立了试件偏转角度与试件杨氏模量之间的一般表达式。

To suppress the noise which caused by the fuzzy character of XLPE sample, the size of the photodetector was determined based on the analysis of the light intensity distribution in the spatial frequency plane when the laser beam passing through the sample was collected by lens. A series of detectors were designed to eliminate the time response decreasing effect caused by the increasing of the detector size. The developed laser system could resolve defects of 40 um diameter in XLPE tape with the 120um diameter and 400Hz scanning laser beam. after above results was used.

为了消除由于XLPE材料光弥散效应引起的信号噪声对信号幅度测量的影响和提高测试速度，研制了阵列组合式光电探测器，理论分析和实验验证都证明了该探测器有较好的频响特性和较低的噪声水平，应用这两项成果组成的信号系统及微机数据采集电路可在400Hz扫描频率下，扫描宽度所限制的120μm光束直径下获得40μm的测量分辨率。

The generation of blue light through direct frequency doubling of 860nm has been achieved in our two typical samples. Sample A and sample B have the number of domain laminas of 460 and 290 respectively, and the SHG efficiency are 4.2% and 3.5% in the two samples.

通过在不同的晶体偏角下进行基波波长扫描的倍频效率的测量，给出光学超晶格样品的&允许偏角&，超过这个角度，非线性倍频转换效率急剧下降。

"The operators will suffer a temporary decrease in the number of consumers and short message services as people may not like having to provide their ID cards for a phone number," Xu Junqi, vice-dean with the Policy-Making Institute of the Telecommunications Research Centre under MII, said yesterday.

信息产业部下属的通信决策研究院副主任徐俊其昨天说：&实行手机实名制后，人们可能不太情愿用身份证注册手机号，所以通信运营商会暂时面临用户减少和短信用户减少的问题。&

I don't believe in make-believe!

我不相信这些虚构的故事。