干燥指数
- 名aridity index
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而当辐射干燥指数大于10时,它们之间的相关性很小。
When RDI was greater than 10 , their correlations were rather weak .
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利用贺兰山北部树轮资料重建过去270年以来6~8月平均干燥指数
Reconstruction of mean drought index from June to August for the last 270 years using tree-ring data in the northern Helan Mountain
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多年干燥指数呈现,除了5月、10月呈现小幅下降外,其余月份全部呈现上升趋势,且西北部的变化趋势高于东南部地区,源区总体趋于干旱。
The trend of Evaporation ratio is upward except may and october . The change trend in the southeastern of region is bigger than the change trend in the northwest . Overall , the regions rends to dry .
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进一步计算了干燥度指数,并在10a代际尺度上详细分析了辽西干湿气候变化特征。
Furthermore , we have calculated the aridity index and analyzed the inter-decadal fluctuation of dry and wet climate .
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采用Holdridge潜在蒸发方法计算出了泾河流域的气候干燥度指数,构建了遥感植被指数与气候干燥度指数之间的回归模型。
Potential evaporation equation of Holdridge was employed to calculate climatic aridity index ( AI ), and construct the regression model between Normalized Difference Vegetation Index ( NDVI ) and AI .
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流域格局指数AI、CONTAG、SHDI、SHEI等与干燥度指数有很好的相关性;中上游地区气候相对湿润,景观破碎化程度较高,多样性、均匀度明显高于下游。
Pattern indexes such as AI , CONTAG , SHDI , and SHEI and so on have good correlations with aridity index . Climate in upper and middle reaches is relative humid , degrees of fragmentation ; diversity and evenness here are much higher than lower reaches .
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基于潜在蒸散和干燥度指数的河北省农业气候区划
Agricultural climate division of Hebei Province based on potential evapotranspiration and surface aridity index
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地理生态学的干燥度指数及其应用评述
Aridity index and its applications in geo-ecological study
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选出了用于玉米薄层干燥的模型:指数模型、单项扩散模型和Page模型。
Models which can be used to describe the maize thin-layer drying are : exponential model , single entry diffusion model and Page model have been selected .
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结果表明,多孔干燥层温度按指数规律变化,变化幅度取决于水汽流率,冻结层温度按线性分布,预测冻干时间与实际结果相符。
The results shows that temperature in the porous dried layer varies-as a exponential discipline whose changing scope is determined by the mass flux and a linear distribution in temperature exists across the frozen layer . The predicted drying time is found to fits the experimental results .
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在同一干燥温度下,随着垃圾厚度的增加,干燥时间近似呈指数形式增加;
At a specified drying temperature , drying time was highly dependent upon the packed waste thickness , having an exponent relation with the thickness .
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研究结果表明太阳能干燥薄层褐煤主要发生在降速干燥阶段,干燥曲线和干燥速率曲线呈指数变化。
It concluded that thin layer solar drying lignite mainly occurred in the falling rate drying period .