This study adopted two - stage random sampling method. The valid subjects were 300.

本研究采二阶段随机抽样方法, 有效样本共300位.

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Objective : To explore the sampling method of telephone survey.

目的: 探讨电话访问的抽样方法.

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To improve measurement accuracy, also a double - rate sampling method is proposed.

为了提高测量精度, 还研究了双采样速率方法.

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Methods: Cluster randomized sampling method for selecting subjectsand logistic regression were used to analyze these data.

方法: 采用分层整群随机抽样调查搜集资料,采用多序类回归分析筛选影响因素.

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The test method and exhaust gas sampling method constitutes the emission measure method.

车辆排放测量方法主要由排放检测方法和尾气取样方法构成.

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Sampling method and calculating method of concentraction of oil in sewage water was discussed.

本文讨论了污水中油的采样和结果计算方法.

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Reference source method is adopted to overcome the wiring shortcoming in traditional voltage sampling method.

系统采用基准源法的布线结构,以克服传统电压取样法中布线复杂的缺点.

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In this thesis, some traditional methods are introduced, such as, window method and frequency sampling method.

本文介绍了一些传统的方法, 如窗函数法、频率采样法.

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Then the proposed step - variable contour sampling method is used to adaptively sample the processed contours.

为了更有效地获得三维医学图像,提出了一种可调整步长的适应性图像目标轮廓采样方法.

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Then the sampling method of network traffic measure and error checking method is introduced.

然后介绍了抽样测量的一般方法,以及抽样测量分析中的误差检验方法.

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The linear intersect combustibles sampling method is used for combustibles measurement in different diameter grades.

地表可燃物载量调查采用线状相交可燃物取样调查方法,按不同径级调查可燃物载量.

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