运用R/S(Rescaled Range Analysis)方法,对1951—2000年过去50年西安市的气温、降水、相对湿度和日照百分率等气候因子的冬(12、1、2月)、夏(6、7、8月)和年平均值进行了分析计算,各因子的Hurst指数H均大于0.5,说明了4个因子存在明显的H...运用R/S(Rescaled Range Analysis)方法,对1951—2000年过去50年西安市的气温、降水、相对湿度和日照百分率等气候因子的冬(12、1、2月)、夏(6、7、8月)和年平均值进行了分析计算,各因子的Hurst指数H均大于0.5,说明了4个因子存在明显的Hurst现象,反映出西安市过去50年来气候变化存在趋势性成分。过去50年气候资料统计表明,西安市气温呈现升高趋势,而降水、相对湿度和日照百分率则呈下降趋势,城市化效应已经对西安局地气候产生显著的影响。展开更多
SHEZU people in Yuan dynasty lived in the juncture of today’s Fujian, Guangdong and Jiangxi Provinces, whose territory was a little bit larger than they did in Tang and Song periods. They believed in Panhu and farmed...SHEZU people in Yuan dynasty lived in the juncture of today’s Fujian, Guangdong and Jiangxi Provinces, whose territory was a little bit larger than they did in Tang and Song periods. They believed in Panhu and farmed by a slash-and-burn method. In the middle and late Zhiyuan perijod, SHEZU people rose and fought against the Yuan government many times, not for the restoration of Song Dynasty, but for their intolerance of the exploitation by officials. The subsequent suppression of SHEZU people did not cause a large population migration. The Yuan government set up Shejun, the local troops, whose task was to open up wasteland and grow grain. The author holds that yuan Dynasty did not establish Tusi, a system of appointing national minority hereditary headmen.展开更多
文摘运用R/S(Rescaled Range Analysis)方法,对1951—2000年过去50年西安市的气温、降水、相对湿度和日照百分率等气候因子的冬(12、1、2月)、夏(6、7、8月)和年平均值进行了分析计算,各因子的Hurst指数H均大于0.5,说明了4个因子存在明显的Hurst现象,反映出西安市过去50年来气候变化存在趋势性成分。过去50年气候资料统计表明,西安市气温呈现升高趋势,而降水、相对湿度和日照百分率则呈下降趋势,城市化效应已经对西安局地气候产生显著的影响。
文摘SHEZU people in Yuan dynasty lived in the juncture of today’s Fujian, Guangdong and Jiangxi Provinces, whose territory was a little bit larger than they did in Tang and Song periods. They believed in Panhu and farmed by a slash-and-burn method. In the middle and late Zhiyuan perijod, SHEZU people rose and fought against the Yuan government many times, not for the restoration of Song Dynasty, but for their intolerance of the exploitation by officials. The subsequent suppression of SHEZU people did not cause a large population migration. The Yuan government set up Shejun, the local troops, whose task was to open up wasteland and grow grain. The author holds that yuan Dynasty did not establish Tusi, a system of appointing national minority hereditary headmen.
