理学 >>> 地质学 >>> 矿床学与矿相学 >>> 凹凸棒石
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The water resource in Linyi city has the characteristics of big inter-annual and annual change and uneven geographical distribution, but is relatively the abundant area in Shandong province. The surfa...
Gravity model has been applied to trade and tourism for long. This paper analyzes the decisive factor of Zhangqiu’s tourist resource from the perspective of the actual data by adopting Gravity model. ...
This paper, based on the forest map of Mao’er Mountain in 1983 and forest inventory sub-compartment database of Mao’er Mountain in 2004, and with the support of geographical information system (GIS), ...

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