Comprehensive and systematic analysis has been made about the dust pollution of the arid and semi arid areas in Gansu province based on statistic data of TSP and natural dust within last 10 years.
本文用近10年来TSP、降尘监测数据对甘肃省干旱、半干旱地区尘类污染进行了较系统、全面地分析。
Another important feature of the equipments is the checking standard function, which can implement supervision and control based on statistic theory to the quality of verification data.
本装置的另一重要特点是具备核查标准功能，可以对检定数据质量实施基于统计理论的监督和控制。
Putting forward the change statistic method based on acreage, and counting the varieties of vector map data by using polygon intersection of vector data and changed pixel of raster data.
提出基于面积的变化统计方法，分别利用矢量数据的多边形交集和栅格数据的变化像素来统计地图矢量数据的变化。
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