Sharp geochemical change belt reflects the geochemical characteristics of block margin of craton and so on, which reveals the boundarylocation more effective than geological survey.
地球化学急变带反映了克拉通边缘的地球化学特征，它可比地质观察更有效地揭示克拉通边界的位置。
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In this way, this proposed algorithm takes merits of the combination of edge detection and region growth to realize the accurate boundarylocationof 3d curved surface.
Positioned on the boundary between Philadelphia and Montgomery County, our school offers a quiet suburban location with access to the best of a thriving city.