综合考虑温度、降雪量、风等因素,构建冰雪运动气候指数(ice-snow sport climate index,ISCI)评价模型,确定冰雪运动气候适应性分级标准。以山西省为例,定量评价冰雪运动的气候适宜性特征和空间分布状况。结果表明:全省冰雪运动气候指...综合考虑温度、降雪量、风等因素,构建冰雪运动气候指数(ice-snow sport climate index,ISCI)评价模型,确定冰雪运动气候适应性分级标准。以山西省为例,定量评价冰雪运动的气候适宜性特征和空间分布状况。结果表明:全省冰雪运动气候指数平均值为5. 03,属于一般适宜等级; 38°N以北的大部分区域均适合发展冰雪运动产业,且未来气候适宜性呈现增强趋势。展开更多
The isotherm is an important feature of infrared satellite cloud images (ISCI), which can directly reveal substantial information of cloud systems. The isotherm extraction of ISCI can remove the redundant information ...The isotherm is an important feature of infrared satellite cloud images (ISCI), which can directly reveal substantial information of cloud systems. The isotherm extraction of ISCI can remove the redundant information and therefore helps to compress the information of ISCI. In this paper, an isotherm extraction method is presented. The main aggregate of clouds can be segmented based on mathematical morphology. T algorithm and IP algorithm are then applied to extract the isotherms from the main aggregate of clouds. A concrete example for the extraction of isotherm based on IBM SP2 is described. The result shows that this is a high efficient algorithm. It can be used in feature extractions of infrared images for weather forecasts.展开更多
文摘The isotherm is an important feature of infrared satellite cloud images (ISCI), which can directly reveal substantial information of cloud systems. The isotherm extraction of ISCI can remove the redundant information and therefore helps to compress the information of ISCI. In this paper, an isotherm extraction method is presented. The main aggregate of clouds can be segmented based on mathematical morphology. T algorithm and IP algorithm are then applied to extract the isotherms from the main aggregate of clouds. A concrete example for the extraction of isotherm based on IBM SP2 is described. The result shows that this is a high efficient algorithm. It can be used in feature extractions of infrared images for weather forecasts.
