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基于差分进化算法的核磁共振T2谱多指数反演
  • 期刊名称：物理学报57（2008）5956-6961
  • 时间：0
  • 分类：O753.2[理学—晶体学] TN911.72[电子电信—通信与信息系统;电子电信—信息与通信工程]
  • 作者机构：[1]复旦大学数学科学学院,上海200433, [2]中国石油大学（华东）,东营257061
  • 相关基金：国家自然科学基金（批准号：10431030）资助的课题.
  • 相关项目：数学物理方程的反问题及其应用
关键词： 核磁共振, 多指数反演, 差分进化, 岩心分析, nuclear magnetic resonance, multi-exponential inversion, differential evolution, core analysis
中文摘要：

提出了一种基于差分进化（DE）算法的核磁共振弛豫信号多指数反演新方法.将核磁共振T2谱反演问题转化为带非负约束的非线性优化问题,不需要预先给定横向弛豫时间T2分布,直接利用差分进化算法进行反演计算.在测量信号低信噪比的情况下,计算机模拟和实验数据反演都表明了该方法在分析处理NMR弛豫信号中的有效性.

英文摘要：

A new multi-exponential inversion method for NMR relaxation signals is presented and tested, which is based on differential evolution （DE） algorithm. The inversion of T2 spectrum in NMR is reduced to a non-negative constraint optimization problem, and solved directly by DE algorithm without pre-assigning the distribution of relaxation time T2 . The validity and effectiveness of our method is demonstrated by computer simulations and the inversion of practical NMR data under low SNR.

同期刊论文项目
数学物理方程的反问题及其应用
期刊论文 53 会议论文 19 著作 4
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