As any test is only a sample of all-possible items or behaviour, whether the test items adequately sample the wider range of possible items is of prime concern. 由于任何测验都只是从所有可能的行为样本中抽取的一个样本,则需要最先考虑的问题就在于,测验项目是否精确地涵盖了可能存在的所有项目的大部分。
Another point of consideration is to adapt the sample to the optimum concentration range of the chosen technique. 另一点考虑是采用所选技术的最佳浓度范围的样品。
Reagent selection, control style and temperature chosen, along with sample size is investigated for a range of materials with different structures and delivery mechanisms – caplets, gel caps etc. 试剂的选择,控制方式和温度选择,以及样本大小的研究是根据一系列不同结构和输送装置的材料,如:粒,胶帽等。
Note that the only reason this is problematic for me is that the sample program constantly updates the range of some sliders. 注意,这对我是个问题的惟一原因是,示例程序要不断地更新一些滚动条的范围。
At present, the seismograph with 24 bit A/ D converter has low noise, low distortion, high sample rate and larger instantaneous dynamic range. It has realized the record of micro volt signals, created the condition for the seismic prospecting of the high resolution. 目前,24位模数转换器的地震勘探仪器具有低噪音、低畸变和高采样率,较大的瞬时动态范围,实现了微伏级信号的记录,为我们进行高分辨率地震勘探创造了条件。
Firstly, we took light cycle oil ( LCO) as a sample and discussed the separation characteristics of GC × GC and optimization of the conditions for separation of a sample with a wide distillation range. 首先以轻质循环油和系列正构烷烃为例,讨论了GC×GC的分离特性及用于宽馏程样品分离条件最佳化的方法。
The specific resistance of coal-derived needle coke is determinated on the model THS-80 particle specific resistance gauge. The effects of sample size range and loading height on specific resistance determination is investigated and the optimal testing conditions is also obtained by use of orthogonal experiment. 利用THS-80型粉末比电阻测定仪,测定煤系针状焦的比电阻,探讨试样粒度和装样高度对测试值的影响,并利用正交试验的方法确定较优的测试条件。
The measurement accuracy of differential propagation phase shift Φ DP is calculated with various sample pairs M, range average intervals and spectrum widths σ V by using theoretical formula. Then, the effect of those factors on the measurement errors of Φ DP is analyzed. 本文从理论公式出发,计算和分析了不同方位平均、距离平均、不同谱宽σV等因素对差传播相移ΦDP测量精度的影响。
A complete standard sample series with certain content range and proper content gradient can be formed together with the reference materials of America and Russia. 系列性好:这些样品还可与美、俄的标准物质构成既具有较大的元素浓度范围又具有适当浓度梯度的标准系列;
In this paper, estimating law for mineral content, simple proof of the law and determining lowest sample size and error range in measure and statistics are discussed. The law is used in point measure method with microscope to mass ore. 本文主要论述块状矿石显微镜下矿物含量点测法的估计定律,以及此定律的简要证明、测量统计中最低限度样本容量的确定及误差范围。
Discussion on selection of sample disposal, and pre-treatment conditions while applying supercritical fluid extraction, such as: selection of SF; characteristics of CO2 and its application to sample pre-treatment and range; 讨论了应用超临界流体萃取法进行样品预处理时的条件选择:超临界流体的选择,列举了数种常用的超临界流体,详尽介绍了CO2的特性及其在样品预处理中的应用范围;
[ Conclusions] The liquid protein chip has the merit of simpler operation, smaller sample amount, wider linear range and higher accuracy in detecting multiple tumor markers. It can be used in clinical practice widely. [结论]液相蛋白芯片检测多肿瘤标志物具有操作简便、标本用量少、线性范围广、准确度高的优点,可推广应用于临床检验。
The results show an apparent decay in the Hugoniot elastic limit with increasing propagation distance, as well as a stress relaxation behind the elastic wave front, and nearly 44% loss of Hugoniot elastic limit was observed in the present sample thickness range. 实验结果显示:Hugoniot弹性极限随着传播距离呈指数衰减,在所研究的样品厚度范围内,Hugoniot弹性极限减小了44%;
The method has been applied to the determination of tellurium in lead tellurium residue sample with recoveries in the range of 98.0%~ 102.3% and relative standard deviation in the range of 0.4%~ 0.8%. ml-1。本方法用于铅碲渣中碲的测定,回收率为98.0%~102.3%,相对标准偏差为0.4%~0.8%。
X-ray fluorescence spectrometry has many good advantages such as quick analysis speed, no sample destruction, wide detection range and reliable results. X射线荧光光谱分析具有分析速度快、不破坏样品组成、检测范围广、结果稳定可靠等优点。
Conclusions Not only is the new method sensitive, the less sample volume, wider linear range, reliable and easy to operate, but also it benefits the opertor's health. 结论本方法灵敏度高,取样量少,线性范围宽,准确可靠,操作简单快速,分析过程中对环境污染少,有利分析人员健康,是一种较好的尿砷分析方法。
This paper gives the distribution of sample median, sample range, and the negative logarithm of sample product on the basis of function distribution. 应用推导随机(向量)函数分布的有关知识,给出了均匀总体样本的中位数、样本极差及样本分量乘积的负对数的概率分布。
The results of N_2 sorption showed type IV isotherm, indicating that pore size of sample is in the range of mesopore. N2吸附-脱附实验结果表明:等温线类型为Ⅳ型,有序度较高的样品的最可几孔径在2.7nm左右,BET表面积大于700cm~3/g。
The detections of a blind sample gave results within the given range of concentration. 盲样测定结果在给定浓度范围内。
We also studied the effects of the dielectric property of the sample in the whole range in which the ST-ESR spectra are sensitive to τ C. 作者还研究了在ST-ESR谱对~(τ)C的整个敏感范围内样品介电性质的作用。
Further research should be done in children with large sample and upper-age range. 因此更大样本和大年龄范围的研究有待进一步进行。
Proteomics is still in its infancy although great progresses have been made in proteomics during the last decade, because the extreme complexity of proteome sample and large dynamic range of protein abundance overwhelm the capability of all currently available analytical platforms. 在过去的十几年中,蛋白质组学虽然获得了快速的发展,但仍然处于组学研究工作的初期,因为蛋白组样品的的复杂性和蛋白丰度的极大差别远远超过目前任何分析平台的鉴定能力。
The empirical identification method is mainly verify the existence of earnings management in large sample range by establish model, which is relatively accurate. 模型识别法主要是验证大样本范围内是否存在盈余管理,验证过程复杂,精确性较高。
Data sample range is from the first quarter of 1999 to the fourth quarter of 2010.It has 48 observation values. 数据样本范围是1999年第一季度到2010年第四季度,共48个观察值。
Because the clusters disrupt in ferrofluid, the inverse susceptibility versus temperature curve measured from the sample in the temperature range of 300-340 K does not obey the linear relationship described by Curie law, but shows an up-bending superlinearity. 由于磁流体中的聚集体发生分离,300~340K温度范围内磁流体样品的磁化率倒数与温度的关系不符合居里定律描述的线性关系,而是呈现向上弯曲的非线性。