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起伏面磁场及其梯度张量快速三维正演方法(英文) 被引量:1
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作者 李昆 陈龙伟 +4 位作者 陈轻蕊 戴世坤 张钱江 赵东东 凌嘉宣 《Applied Geophysics》 SCIE CSCD 2018年第3期500-512,共13页
随着磁梯度张量测量技术迅速发展,为实现精细反演地下磁化率分布提供了数据保障。基于航空和陆地磁测数据的三维磁化率反演需要计算起伏面上的磁场,因此研究起伏面磁场及其梯度张量快速三维正演方法具有重要实际应用价值。针对任意磁化... 随着磁梯度张量测量技术迅速发展,为实现精细反演地下磁化率分布提供了数据保障。基于航空和陆地磁测数据的三维磁化率反演需要计算起伏面上的磁场,因此研究起伏面磁场及其梯度张量快速三维正演方法具有重要实际应用价值。针对任意磁化率分布、起伏面磁场及其梯度张量三维正演问题,本文提出了一种快速波数域三维正演方法,其关键环节包括:(1)结合棱柱体组合模型波数域表达式和Gauss-FFT算法,提出一种任意磁化分布情况下平面磁场及其梯度张量快速三维正演算法;(2)利用平面三维正演算法,计算多个高度平面磁场及其梯度张量,结合三次样条插值方法,实现起伏面磁场及其梯度张量三维正演。在此过程中,提出一种多个高度面情况下波数域加权系数快速计算方法,进一步提高了起伏面情况下三维正演的计算效率。通过设计不同模型算例,验证了新方法的计算精度和效率。 展开更多
关键词 Undulated surface magnetic fi eld gradient TENSOR 3D FORWARD modeling Gauss– FFT algorithm WAVENUMBER domain
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Empirical Analysis on Factors Restricting Low-carbon Agricultural Development in Hubei Province
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作者 Li Qi Li Bianlian 《Meteorological and Environmental Research》 CAS 2014年第5期36-38,共3页
From the perspective of input into agricultural production, the growth of agricultural production from 1982 to 2010 in Hubei Province was analyzed by using multiple regression method. The results show that the quantit... From the perspective of input into agricultural production, the growth of agricultural production from 1982 to 2010 in Hubei Province was analyzed by using multiple regression method. The results show that the quantity of fertilizer and the total power of machinery used for farming have significantly contributed to agricultural growth in Hubei Province, but they are also main factors restricting low-carbon agricultural development in Hubei Province. Therefore, the key point to develop low-carbon agriculture in Hubei Province currently should be put on how to fertilize rationally, how to innovate the pattern of agricultural production, how to develop agricultural mechanization rationally and so on. 展开更多
关键词 Low-carbon agriculture Production function Influencing factor COUNTERMEASURES China
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