The "Unit type" lithogeochemical survey method can decrease the numbers of sampling and the amounts of analytic run, and reduce greatly production costs.
“面型”岩石测量方法可成倍地减少样品采集量和分析工作量，大幅度降低了工作成本。
This article presents a digital type electromagnetic radiation measurement system along with its schematic circuit diagram, high speed discrete data sampling method and FFT calculation methods.
本文详细介绍电磁辐射数字化测量系统，给出了电路原理图，离散化数据高速采样方法及FFT计算方法。
Based on the measurement of flow field, the particle concentration distribution in the PDC type cyclone tube was studied by isokinetic sampling method.
在流场测试的基础上，采用等动采样的原理，对PD C型旋风管内的颗粒浓度分布进行了全面系统地测试。
Methods Under stratified sampling, the investigation of the oral health concept and behavior were carried out using closed type questionnaire method.
方法采取分层抽样方法，分别对口腔健康观念与行为情况进行问卷调查、填写记录。
Method: We adopted different level and wholly type sampling and letter investigation for 242 person who works in 84 medical unit, We analyzed 225 people's data (92. 97% ) .
方法：采用分层抽样与整体抽样对84个医疗单位242人进行信访调查，并对资料完整的225人（92.97%）进行分析。
Some superiorities of using down hole hammer counter circulation type continuous coring (sampling) method in gold ore exploration are expounded in this paper.
文中阐述了在金矿勘探中应用潜孔锤反循环连续取心（样）的优越性；
Some superiorities of using down hole hammer counter circulation type continuous coring (sampling) method in gold ore exploration are expounded in this paper.
文中阐述了在金矿勘探中应用潜孔锤反循环连续取心（样）的优越性；
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