波谱学杂志 ›› 1999, Vol. 16 ›› Issue (1): 70-75.

• 研究论文 • 上一篇    下一篇

相位交替组合脉冲NMR

杨绪杰, 贾红兵, 刘孝恒, 黄小波, 陆路德, 汪信   

  1. 南京理工大学化工学院, 南京 210094
  • 收稿日期:1998-10-05 修回日期:1998-12-07 出版日期:1999-02-05 发布日期:2018-01-11
  • 作者简介:杨绪杰,男,1947年出生,硕士,副教授

COMPOSITE PULSE NMR WITH PHASE ALTERNATION

Yang Xujie, Jia Hongbing, Liu Xiaoheng, Huang Xiaobo, Lu Lude, Wang Xin   

  1. School of Chemical Engineering, Nanjing University of Science and Technology, Najing 210094
  • Received:1998-10-05 Revised:1998-12-07 Online:1999-02-05 Published:2018-01-11

摘要: 用Wigner旋转矩阵和修改的Levenberg-Marquardt算法来描述优选相位交替组合π脉冲,编写了子程序DBCLSF和QRDCMP代表"IMSL"子程序库,解决非线性最小二乘法的问题.计算是在COMPAQ 586PC机上进行.可以发现,其优化结果同参考文献中用IBM/3600大型计算机的结果相同,优于其它现有的组合π脉冲.

关键词: 组合脉冲, 优化, 程序, 最小二乘法

Abstract: Optimizing phase alternating composite π pulses were described by using Wigner rotation matrix and modified Levenberg-Marquardt algorithm. The subroutines DBCLSF and QRDCMP were programed instead of "IMSL" subroutine library to solve the non-linear least square problems. The calculations were carried out on COMPAQ 586 personal computer, it was found that the optimized results were in agreement with that reported in the reference being obtained from IBM/3600 computer and better than other existing composite π pulses.

Key words: Composile pulse, Optimization, Program, Least square method