桓仁山区热度日与冷度日变化特征分析

应用19532010年桓仁县逐日平均气温序列,对桓仁山区月、年的热度日（HDD）和冷度日（CDD）的变化规律进行分析,并探讨度日与平均气温的关系。结果表明,平均月HDD以1月最大,年HDD呈明显的下降趋势,其线性倾向率为-98.96（℃.d）/10a;平均月CDD以7月最大,CDD多年呈上升趋势,上升率为7.13（℃.d）/10a。年HDD和CDD与年平均气温具有较高的相关性;年际、年代际HDD与年际、年代际平均气温具有反位相变化趋势;随着气候变暖,桓仁山区HDD将趋于减小,冬季用于供暖的能源将减少,CDD将趋于增加,夏季用于制冷降温的能源将增加。     

Adaptive image inpainting algorithm based on CDD model

An adaptive image inpainting algorithm based on CDD model is proposed. An adaptive coefficient is introduced to choose the right inpainting model for different curvatures. The coefficient adopts CDD model only for large curvatures,and use TV model for others. Thus the repair time of CDD model is greatly reduced. Another adaptive coefficient is introduced to choose the right diffusion way for different degrees of change. This coefficient adopts a more closing TV model in damage area edge which has large gradient,and use thermal diffusion equation in flat areas which has small gradient. Then better inpainting results can be achieved. Experiments show that the proposed algorithm has much faster inpainting speed and better inpainting results than CDD model.