Numerous coal fires burn underneath the Datong coalfield because of indiscriminate *** TM/ETM,unmanned aerial vehicle（UAV）,and infrared thermal imager were employed to monitor underground coal fires in the Majiliang...
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Numerous coal fires burn underneath the Datong coalfield because of indiscriminate *** TM/ETM,unmanned aerial vehicle（UAV）,and infrared thermal imager were employed to monitor underground coal fires in the Majiliang mining *** thermal field distributions of this area in 2000,2002,2006,2007,and 2009 were obtained using Landsat TM/*** changes in the distribution were then analyzed to approximate the locations of the coal *** UAV imagery employed at a very high resolution（0.2 m）,the texture information,linear features,and brightness of the ground fissures in the coal fire area were *** these data were combined to build a knowledge model of determining fissures and were used to support underground coal fire *** infrared thermal imager was used to map the thermal field distribution of areas where coal fire is *** were analyzed to identify the hot spot trend and the depth of the burning point.
为研究COSMIC(constellation observing system for meteorology,ionosphere and climate)掩星反演湿温廓线的质量,需对数据误差特性进行量化研究。首先采用线性插值的方法,以时间窗3 h、水平距离300 km为匹配准则,对0.2~30 km各高度层...
详细信息
为研究COSMIC(constellation observing system for meteorology,ionosphere and climate)掩星反演湿温廓线的质量,需对数据误差特性进行量化研究。首先采用线性插值的方法,以时间窗3 h、水平距离300 km为匹配准则,对0.2~30 km各高度层温度的平均偏差和标准差进行统计分析,研究随海拔高、季节和纬度带变化的温度平均偏差特性。然后采用2016年的全球探空数据集分析全球区域的COSMIC湿温廓线质量,以及北温带COSMIC湿温廓线质量随季节变化的特点,探究不同纬度带地区COSMIC掩星湿温廓线质量随纬度变化的特点。结果表明,全球范围内温度平均偏差为-0.16 K,掩星数据和探空站资料精度相当;季节变化的统计量F=0.999 6>0.05,该因素对COSMIC湿温廓线质量影响不显著;纬度带变化的统计量F=0.024 4<0.05,该因素对COSMIC湿温廓线质量有显著影响,尤其是热带地区受水汽影响较大,温度平均偏差处于峰值,偏差高于0.25 K,南温带地区次之。
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