查询词典 sampling method

Methods Collecting basic information of 67 community health service institutions applying method of self-filling questionnaire sampling, inputting data with Epidata 3.02, analyzing with EXCEL.

方法采用自填式问卷抽查的方法，收集67家社区健康服务机构基本资料，采用Epidata3.02建立数据库并录入数据，用Excel进行分析。

The method can be used to simulate the whole body shape of log approximately by sampling the cross sections along the length direction of log, thus providing a reference model for optimum saw cutting of log.

将其运用到原木长度方向上的多个采样截面，可近似模拟出原木的整体外形，从而为原木的优化下锯提供参考模型。

However, the mathematical study of the geology of this area is still lacking. On the basis of geological field survey, we have made systematic sampling and geochemical analyses of the rocks, and systematically studied the relationship between the Cu-Ni variable and the rock-forming element variables by the method of multi-variate...

文中在系统的野外地质调查基础上，进行了系统采样和岩石地球化学分析，应用多元线性回归和逐步回归分析相结合的方法，借助SPSS数学统计软件系统的研究Cu-Ni变量与造岩元素变量的关系，建立Cu-Ni变量与其他变量的回归方程，验证与解释白石泉Cu-Ni硫化物矿床的成因、岩浆来源等问题，对指导找矿勘探有重要作用，对应用数学地质方法有指引作用。

Based on basic theory of elastic wave propagation, wave equation forpropagation of elastic wave in 2 dimension vertical inhomogeneous mediumof similar concrete cutoff wall model is developed. 2 dimension elastic sheetof concrete cutoff wall is established to research law and energy distributionrelations between propagation, attenuation, reflection and transmission ofelastic wave in concrete cutoff wall; Based on the concept of resolution, thecontent of vertical reflection method used to inspect concrete cutoff wallresolution is raised and factors will have influences on resolution are analyzed,expression of defective layer composite reflection factor and detectabledefective layer maximum thickness are developed; Relations between allsteps of sampling system of vertical reflection are build, the influence ofcentrum characteristics and receiving sensor on testing results are analyzed,therefore parameter requirements for testing instrument and parameter selection principle of collected parameters are raised.

2从弹性波传播的基本理论研究出发，推导了弹性波在类似混凝土防渗墙模型的二维垂向不均匀介质中传播的波动方程式；建立了混凝土防渗墙二维弹性薄板模型，研究弹性波在混凝土防渗墙中的传播、衰减、反射、透射规律及能量分配关系；从分辨率的概念出发，提出了垂直反射法检测混凝土防渗墙分辨率的内涵，对影响分辨率的因素进行了分析，推导出了缺陷层复合反射系数、可检测缺陷层极限厚度的表达式；建立了垂直反射法采样系统各环节之间的关系，研究分析了震源特性、接收传感器对测试结果的影响，提出了对测试仪器参数的要求及采集参数的选择原则。

The experimental results show that low probability events of large Differential Group Delay can be resulted by importance sampling simulation and the system configuration is much simpler than by the standard Monte-Carlo method.

实验证明，采用重要抽样的仿真方法可以得到大差分群时延值的小概率事件，并且系统配置比用蒙特－卡洛的仿真方法简单得多。

The cluster random sampling method was employed to select 3 hospitals from all 5 municipal hospitals, the selected 3 hospitals were Zhuhai people hospital, Gongbei hospital, and maternal and child health care hospital.

方法采用整群随机抽样方法，在珠海市五所市级医院中随机抽取三所医院(即：珠海市人民医院、拱北医院和中医院)。

The fusion slide glass and powder pressed wafer are used for sampling, and empirical a coefficient and scattered ray inter standard method are adopted to correct the effect between elements.

采用熔融玻璃片和粉末压片法制样，用理论α系数和散射线内标法校正元素间的效应。

Based on Iwao's method, the formula of optimum theortical sampling number was established. By using methods for variance analysis, the number of B. tabaci eggs showed little difference on the upper, middle, and lower canopy of L.

应用Iwao的抽样模型，建立了烟粉虱卵的田间理论抽样数公式方差分析表明，烟粉虱卵在女贞树冠上层、中层、下层的分布数量差异不显著。

Based on Iwao's method, the formula of optimum theortical sampling number was established. By using methods for variance analysis, the number of B. tabaci eggs showed little difference on the upper, middle, and lower canopy of L.

应用Iwao的抽样模型，建立了烟粉虱卵的田间理论抽样数公式方差分析表明，烟粉虱卵在女贞树冠上层、中层、下层的分布数童差异不显著。

A method of bandpass signal acquisition using the second order sampling is developed.

研究了采用二阶采样实现带通信号采集的方法。

Many will continue to choose to live in duality and in conflict.

许多人将继续选择活在二元对立性和冲突中。

I find that students of the University of Physical Education all wear sportswear at first sight.

我发现：体育大学的学生乍一看，都是穿运动衣，大家都一样