The groundwater monitoring network design involves the determination of the sampling locations and sampling frequencies to characterize the contaminant plume in an aquifer over space and time.
地下水污染监测网的设计包括取样点在空间上的采样位置和时间上的取样频率这两方面的确定，其目的是为了准确刻画污染羽在含水层中随时间的变化状况。
In this paper, the principle of Sampling Time Staggered Space Vector Modulation (STS-SVM) as well as its realizing method in cascade multilevel converters is presented.
该文提出并分析了错时采样空间矢量调制(STS - SVM)技术的工作原理及其在级联型多电平变流器上的实现方法。
Through sampling soils of different years and depth in the reclaimed areas of Fushun coal mine, we analyzed the space-time change of soil nutrients and organic carbon.
以素有煤都之称抚顺矿区复垦土壤为例，对不同年限不同深度的土壤进行分析，揭示了抚顺煤矿区土壤养分的时空演变规律。
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