size-fraction analysis 中文意思是什麼
size-fraction analysis
解釋
粒度分析-
The landscape pattern of change on the fraction of green vegetation during this period was studied using a landscape pattern analysis program fragstats by analyzing path size, number of patches, shape metrics and landscape heterogeneity metrics to show the changing feature of landscape pattern. all of these results of indices analysis emphasize that the eco - environmental system in beijing mountain area in a whole is stable and the fragmentation and heterogeneity level in the last five years is decreasing
本文在fcdmappingmodel原理和方法的基礎上,利用1994年和1999年的兩期landsattm數據,對北京北部山區昌平區、懷柔縣、密雲縣、平谷縣和西部山區門頭溝區的植被覆蓋率進行了計算,並利用fragstats軟體對其景觀變化過程從斑塊大小、數量、形狀和景觀異質性等角度進行了時空格局變化的剖析。
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